A kind of impregnated glass fiber pipe and its preparation method

Abstract

The application relates to the technical field of trenchless pipe repairing, in particular to a glass fiber pipe with impregnated glue and a preparation method thereof. The glass fiber pipe with impregnated glue comprises a pipe to be repaired and a CIPP repairing layer covering the pipe to be repaired, the CIPP repairing layer comprises UV pre-impregnated glue and glass fiber fabric, the surface of the glass fiber fabric is compounded with up-conversion nano-particles, and the up-conversion nano-particles account for 0.01-0.20 wt% of the total mass of the glass fiber fabric. In the application, the up-conversion nano-particles are loaded on the surface of the glass fiber fabric, the up-conversion nano-particles convert a light source with a wavelength of 980-1020 nm into ultraviolet light, the UV pre-impregnated glue which is not completely cured in the CIPP repairing layer is subjected to secondary complete curing treatment, and then the comprehensive performance of the prepared glass fiber pipe with impregnated glue can be improved, and the thickness limitation of the existing UV pre-impregnated glue on the one-time forming UV curing process is broken.

Description

Technical Field

[0001] This invention relates to the field of trenchless pipeline repair technology, and in particular to a resin-impregnated fiberglass pipe and its preparation method. Background Technology

[0002] CIPP repair technology, also known as trenchless repair technology, is used to repair damaged pipelines and extend the service life of municipal pipelines. CIPP repair impregnated fiberglass tapes are mainly divided into epoxy resin-based impregnated fiberglass tapes, unsaturated polyester resin-based impregnated fiberglass tapes, vinyl ester resin-based impregnated fiberglass tapes, and UV resin-based impregnated fiberglass tapes.

[0003] UV resin-impregnated fiberglass tape boasts advantages such as high curing efficiency, no VOC generation, and good environmental performance, giving it a promising market prospect. However, the single-stage molding thickness of UV resin-impregnated fiberglass tape is often less than 2mm. When the thickness is ≥2.0mm, complete UV curing in a single pass is impossible, ultimately affecting the physicochemical properties and service life of the CIPP repair layer. To ensure the repair quality of the pipeline, the CIPP repair layer thickness is typically ≥2.0mm. Existing UV curing processes for CIPP repair layers employ multiple UV molding processes, which not only suffer from low CIPP repair efficiency but also expose the first fully cured CIPP repair layer to subsequent UV aging, impacting the service life and quality of the repaired impregnated fiberglass pipe. Therefore, the inventors have provided an impregnated fiberglass pipe and its preparation method. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a resin-impregnated fiberglass pipe and its preparation method.

[0005] The resin-impregnated fiberglass tube provided by this invention is achieved through the following technical solution: A type of impregnated fiberglass pipe includes a pipe to be repaired and a CIPP repair layer covering the pipe to be repaired; the CIPP repair layer includes UV prepreg and fiberglass fabric, and the surface of the fiberglass fabric is coated with upconversion nanoparticles; the upconversion nanoparticles account for 0.01-0.20 wt% of the total mass of the fiberglass fabric.

[0006] Preferably, the prepreg accounts for 40-50 wt% of the total mass of the glass fiber prepreg tape; the prepreg is made from the following raw materials in parts by weight: 10-25 parts polyurethane modified acrylate resin, 5-15 parts epoxy modified acrylate resin, 40-70 parts reactive diluent, 3-8 parts polyisocyanate crosslinking agent, 0.8-1.6 parts antioxidant, 0.05-0.20 parts defoamer, 0.25-0.50 parts wetting agent, 0.5-1.0 parts leveling agent, and 1.0-2.5 parts photoinitiator.

[0007] The CIPP repair layer in this invention has a one-time molding thickness of ≥2.0mm, which breaks through the thickness limitation of existing UV prepregs in one-time UV curing processes.

[0008] Preferably, the polyurethane-modified acrylate resin is a polyurethane-modified acrylate resin with hydroxyl side chains, selected from at least one of T-7000 difunctional polyurethane UV resin, T-7010N difunctional polyurethane UV resin, T-7222 difunctional dual-curing polyurethane acrylate UV resin, T-7135 difunctional polyurethane UV resin, T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, and T-7150 tetrafunctional polyurethane UV resin.

[0009] Preferably, the polyisocyanate crosslinking agent is at least one of 1,6-hexamethylene diisocyanate (HDI) and / or isoflurane diisocyanate (IPDI) combined with HDI dimer, HDI trimer, HDI biuret, and IPDI trimer.

[0010] In the preparation of gel-state UV prepreg film, the hydroxyl-OH groups of the side chains of polyurethane-modified acrylate resin react with the -NCO groups in the polyisocyanate crosslinking agent to form polyurethane bonds -NH-CO-, which increases the viscosity of the UV prepreg and transforms it from a viscous flow state to a gel state. The resulting gel-state UV prepreg film contains a large number of unreacted active double bonds, which are also formed in the subsequently prepared UV prepreg tape. By UV curing treatment followed by curing treatment under laser irradiation with a wavelength of 980-1020nm, the CIPP repair layer with a thickness of ≥2.0mm can be completely cured, breaking through the thickness limitation of existing UV prepregs in one-time UV curing processes, and also avoiding the UV aging risk associated with multiple UV curing processes.

[0011] Preferably, the reactive diluent is at least one of hydroxyethyl methacrylate, N,N-dimethylacrylamide, N-acrylomorpholine, isobornyl methacrylate, 3-isobornylcyclohexyl acrylate, ethoxyethoxyethyl acrylate, propoxylated neopentyl glycol diacrylate, neopentyl glycol polymethyl ethylene oxide diacrylate, bis(trimethylolpropane)tetraacrylate, and 2-hydroxyethyl methacrylate diphenyl phosphate.

[0012] Preferably, the photoinitiator is a compound of a long-wavelength photoinitiator and a short-wavelength photoinitiator; the long-wavelength photoinitiator is at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator 784; and the short-wavelength photoinitiator is at least one of photoinitiator 184, photoinitiator 1173, photoinitiator 2959, and photoinitiator MBF.

[0013] The UV prepreg of this invention uses a combination of long-wavelength and short-wavelength photoinitiators, which allows the CIPP repair layer to be fully UV-cured to the maximum extent during a single UV curing process. This effectively reduces the amount of incompletely cured UV prepreg inside the CIPP repair layer after the first UV curing process, thereby shortening the subsequent curing time under laser irradiation with a wavelength of 980-1020nm. This improves the overall curing efficiency of the impregnated fiberglass pipe and also improves the comprehensive performance of the final impregnated fiberglass pipe.

[0014] Preferably, the upconversion nanoparticles are rare-earth-doped fluorides, which include a NaYF4 support and rare-earth ions doped in the NaYF4 support, wherein the rare-earth ions are Yb. 3+ Paired with Er 3+ Ho 3+ Tm 3+ At least one of them.

[0015] Preferably, if the glass fiber fabric is an aminosilane-modified glass fiber fabric or an epoxysilane-modified glass fiber fabric, then the upconversion nanoparticles are carboxyl-modified upconversion nanoparticles; if the glass fiber fabric is an epoxysilane-modified glass fiber fabric, then the upconversion nanoparticles are amino-modified upconversion nanoparticles.

[0016] The above method can uniformly load upconversion nanoparticles onto the surface of glass fiber fabric, ensuring the uniform distribution of ultraviolet light generated during curing under laser irradiation with a wavelength of 980-1020nm. This can shorten the subsequent curing time under laser irradiation with a wavelength of 980-1020nm, thereby improving the overall curing efficiency of the impregnated glass fiber pipe and improving the comprehensive performance of the final impregnated glass fiber pipe.

[0017] More preferably, the prepreg further includes amino-modified upconversion nanoparticles, wherein the amino-modified upconversion nanoparticles account for 0.01-0.20 wt% of the total mass of the prepreg.

[0018] Introducing uniformly dispersed upconversion nanoparticles into the UV prepreg can further ensure the uniformity of UV light distribution during curing under laser irradiation with a wavelength of 980-1020nm, and shorten the subsequent curing time under laser irradiation with a wavelength of 980-1020nm, thereby improving the overall curing efficiency of the impregnated fiberglass pipe and improving the comprehensive performance of the final impregnated fiberglass pipe.

[0019] Preferably, the epoxy-modified acrylate resin is at least one of epoxy acrylate 615T9XD11Q, epoxy-modified acrylate resin CR90426, and modified bisphenol A epoxy acrylate resin EBECRYL 3708.

[0020] In this invention, epoxy-modified acrylate resin is used to improve the interfacial bonding strength and stability between the CIPP repair layer and the pipe to be repaired, thus ensuring the quality of the CIPP-repaired impregnated fiberglass pipe.

[0021] The present invention provides a method for preparing resin-impregnated fiberglass tubing, which is achieved through the following scheme: A method for preparing resin-impregnated fiberglass tubing includes the following steps: S1, Preparation of upconversion nanoparticles@glass fiber fabric; S1.1, The fiberglass fabric is placed in an aqueous solution of aminosilanol or an aqueous solution of epoxysilanol, and after soaking and drying, aminosilane-modified fiberglass fabric or epoxysilane-modified fiberglass fabric is obtained. S1.2, If the epoxy silane modified glass fiber fabric is placed in an aqueous dispersion of upconversion nanoparticles, the upconversion nanoparticle content in the aqueous dispersion of upconversion nanoparticles is 0.01-0.10 wt%, and the upconversion nanoparticles are amino-modified upconversion nanoparticles and / or carboxyl-modified upconversion nanoparticles. After soaking and drying, upconversion nanoparticles@glass fiber fabric A are obtained. If the aminosilane-modified glass fiber fabric is placed in an aqueous dispersion of carboxyl-modified upconversion nanoparticles, wherein the content of carboxyl-modified upconversion nanoparticles in the aqueous dispersion is 0.01-0.10 wt%, and the upconversion nanoparticles are obtained by soaking and drying to obtain glass fiber fabric B; S2, UV prepreg preparation: Place 10-25 parts of polyurethane modified acrylate resin, 5-15 parts of epoxy modified acrylate resin, 40-70 parts of reactive diluent, 3-8 parts of polyisocyanate crosslinking agent, 0.8-1.6 parts of antioxidant, 0.05-0.20 parts of defoamer, 0.25-0.50 parts of wetting agent, 0.5-1.0 parts of leveling agent, and 1.0-2.5 parts of photoinitiator in a vacuum reactor. Under normal pressure, mechanically stir at 300-600 rpm for 5-15 min, then vacuum degas for 15-30 min, purge with nitrogen to restore normal pressure, and discharge to obtain UV prepreg. S3. Apply UV prepreg onto release paper and pre-cure to form a gel-like UV prepreg film. The UV prepreg coating amount is 170-240 g / m². 2 ; S4, the gel-state UV prepreg film is hot-pressed onto the upper and lower surfaces of upconversion nanoparticles@glass fiber fabric A or upconversion nanoparticles@glass fiber fabric B, respectively, and then wound up and cut to obtain UV prepreg tape; S5. Apply the UV prepreg tape to the damaged area of ​​the pipe to be repaired to form a CIPP repair layer to be cured. The thickness of the CIPP repair layer to be cured is 2.0-4.0mm. Then, place it under a UV light source for 60-100s to cure. The unit light energy is 60~200mW / cm², and the cumulative light energy is 500-7000mJ / cm. Finally, cure it under a laser irradiation of 45-90W with a wavelength of 980-1020nm for 300-600s to form a CIPP repair layer on the pipe to be repaired and obtain the impregnated fiberglass pipe.

[0022] In summary, this invention has the following advantages: When repairing CIPP pipes, the thickness of the CIPP repair layer to be cured is typically ≥2.0mm. However, conventional one-time UV curing processes cannot completely cure the internal UV prepreg. Therefore, the inventors composite upconversion nanoparticles onto the surface of fiberglass fabric to form upconversion nanoparticles@fiberglass fabric. After the initial UV curing of the CIPP repair layer, it is cured under laser irradiation with a wavelength of 980-1020nm. The upconversion nanoparticles loaded on the fiberglass fabric convert the 980-1020nm light source into ultraviolet light, performing a secondary complete curing treatment on the incompletely cured UV prepreg inside the CIPP repair layer. This improves the overall performance of the final prepared impregnated fiberglass pipe, overcomes the thickness limitation of existing UV prepregs in one-time UV curing processes, and avoids the UV aging risk associated with multiple UV curing processes, thus extending the service life of the impregnated fiberglass pipe. Detailed Implementation

[0023] To further understand the inventiveness and technical advancements of this invention, the preferred embodiments of this invention will be discussed in detail below with reference to examples and comparative examples.

[0024] Example: A type of impregnated fiberglass pipe includes a pipe to be repaired and a CIPP repair layer covering the pipe. The CIPP repair layer is prepared as follows: fiberglass prepreg tape is attached to the repaired area of ​​the pipe, forming a CIPP repair layer of a predetermined thickness on the pipe. After being fixed in a transparent annular mold, it is cured by UV curing followed by laser irradiation with a wavelength of 980-1020nm. The predetermined thickness is 2-4mm, depending on the wall thickness of the pipe to be repaired. Specifically, for a DN150 PP pipe, the predetermined thickness of the CIPP repair layer to be cured can be selected as 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, or 4.0mm, which can ensure the quality and service life of the CIPP-repaired fiberglass pipe.

[0025] The CIPP repair layer consists of a UV prepreg and fiberglass fabric, with the prepreg accounting for 40-50 wt% of the total mass of the fiberglass prepreg tape. Upconversion nanoparticles are laminated onto the surface of the fiberglass fabric, accounting for 0.01-0.20 wt% of the total mass of the fiberglass fabric. These upconversion nanoparticles are rare-earth-doped fluorides, comprising a NaYF4 support and rare-earth ions doped into the NaYF4 support, with the rare-earth ions being Yb. 3+ Paired with Er 3+ Ho 3+ Tm 3+ At least one of the following. The upconversion nanoparticles may specifically be selected from the following provided by Xi'an Qiyue Biotechnology Co., Ltd: NaYF4:Yb / Er upconversion nanoparticles (Q-0278583), oily upconversion nanoparticles (Q-0375702, UV light), carboxyl-modified upconversion nanoparticles (Q-0375498, UV light), and amino-modified upconversion nanoparticles (Q-0374460).

[0026] The glass fiber fabric is made by upconversion nanoparticles@glass fiber fabric, and the specific preparation method is as follows: S1, placing the fiberglass fabric in an aqueous solution of aminosilanol or an aqueous solution of epoxysilanol, and obtaining aminosilane-modified fiberglass fabric or epoxysilane-modified fiberglass fabric by soaking and drying. S2, If the epoxy silane modified glass fiber fabric is placed in an aqueous dispersion of upconversion nanoparticles, the content of upconversion nanoparticles in the aqueous dispersion of upconversion nanoparticles is 0.01-0.10 wt%, and the upconversion nanoparticles are amino-modified upconversion nanoparticles and / or carboxyl-modified upconversion nanoparticles. After soaking and drying, the epoxy group on the surface of the glass fiber fabric undergoes a nucleophilic ring-opening reaction with the amino and / or carboxyl groups modified on the surface of the upconversion nanoparticles, and the upconversion nanoparticles are chemically bonded to the surface of the glass fiber fabric to obtain upconversion nanoparticles@glass fiber fabric A; If the aminosilane-modified glass fiber fabric is placed in an aqueous dispersion of carboxyl-modified upconversion nanoparticles, the content of carboxyl-modified upconversion nanoparticles in the aqueous dispersion is 0.01-0.10 wt%. After soaking and drying, the amino groups on the surface of the glass fiber fabric and the carboxyl groups modified on the surface of the upconversion nanoparticles undergo an amidation reaction, and the upconversion nanoparticles are chemically bonded to the surface of the glass fiber fabric to obtain upconversion nanoparticles@glass fiber fabric B.

[0027] Upconversion nanoparticles are uniformly loaded onto the surface of the fiberglass fabric, ensuring the uniformity of ultraviolet light distribution during curing under laser irradiation with a wavelength of 980-1020nm. After the CIPP repair layer to be cured completes the initial UV curing treatment, it is cured under laser irradiation with a wavelength of 980-1020nm. The upconversion nanoparticles loaded on the fiberglass fabric can convert the 980-1020nm light source into ultraviolet light, performing a secondary complete curing treatment on the incompletely cured UV prepreg inside the CIPP repair layer, improving the overall performance of the finally prepared impregnated fiberglass pipe. Furthermore, the uniform distribution of ultraviolet light can shorten the subsequent curing time under laser irradiation with a wavelength of 980-1020nm, thereby improving the overall curing efficiency of the impregnated fiberglass pipe and the overall performance of the finally prepared impregnated fiberglass pipe.

[0028] The prepreg is made from the following raw materials in parts by weight: 10-25 parts polyurethane modified acrylate resin, 5-15 parts epoxy modified acrylate resin, 40-70 parts reactive diluent, 3-8 parts polyisocyanate crosslinking agent, 0.8-1.6 parts antioxidant, 0.05-0.20 parts defoamer, 0.25-0.50 parts wetting agent, 0.5-1.0 parts leveling agent, and 1.0-2.5 parts photoinitiator.

[0029] The polyurethane-modified acrylate resin is a polyurethane-modified acrylate resin with hydroxyl-containing side chains, and can be selected from at least one of T-7000 difunctional polyurethane UV resin, T-7010N difunctional polyurethane UV resin, T-7222 difunctional dual-curing polyurethane UV resin, T-7135 difunctional polyurethane UV resin, T-7224 tetrafunctional dual-curing polyurethane UV resin, and T-7150 tetrafunctional polyurethane UV resin. Preferably, the polyurethane-modified acrylate resin is a compound of T-7222 difunctional dual-curing polyurethane UV resin and T-7224 tetrafunctional dual-curing polyurethane UV resin.

[0030] The epoxy-modified acrylate resin is at least one of epoxy acrylate 615T9XD11Q, epoxy-modified acrylate resin CR90426, and modified bisphenol A epoxy acrylate resin EBECRYL 3708.

[0031] The reactive diluent is at least one selected from hydroxyethyl methacrylate, N,N-dimethylacrylamide, N-acrylomorpholine, isobornyl methacrylate, 3-isobornylcyclohexyl acrylate, ethoxyethoxyethyl acrylate, propoxylated neopentyl glycol diacrylate, neopentyl glycol polymethyl ethylene oxide diacrylate, bis(trimethylolpropane)tetraacrylate, and 2-hydroxyethyl methacrylate diphenyl phosphate. Preferably, the reactive diluent is at least one selected from hydroxyethyl methacrylate, 2-hydroxyethyl methacrylate diphenyl phosphate combined with N,N-dimethylacrylamide, N-acrylomorpholine, isobornyl methacrylate, 3-isobornylcyclohexyl acrylate, ethoxyethoxyethyl acrylate, propoxylated neopentyl glycol diacrylate, neopentyl glycol polymethyl ethylene oxide diacrylate, and bis(trimethylolpropane)tetraacrylate.

[0032] During the preparation of gel-state UV prepreg film, the hydroxyl groups (-OH) in the side chains of polyurethane-modified acrylate resin and hydroxyethyl methacrylate react with the -NCO groups in the polyisocyanate crosslinking agent to form polyurethane bonds (-NH-CO-), which increases the viscosity of the UV prepreg and transforms it from a viscous flow state to a gel state. The benzene ring and phosphorus elements in diphenyl methacrylate-2-hydroxyethyl phosphate can improve the flame retardant, heat resistance, wear resistance, and bending resistance of the prepared impregnated fiberglass pipes.

[0033] The polyisocyanate crosslinking agent is at least one of 1,6-hexamethylene diisocyanate (HDI) and / or isoflurane diisocyanate (IPDI) combined with HDI dimer, HDI trimer, HDI biuret, and IPDI trimer.

[0034] Photoinitiators are composed of long-wavelength photoinitiators and short-wavelength photoinitiators.

[0035] The long-wavelength photoinitiator is at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator 784. The short-wavelength photoinitiator is at least one of photoinitiator 184, photoinitiator 1173, photoinitiator 2959, and photoinitiator MBF.

[0036] The antioxidant can be selected as antioxidant 1010 and / or antioxidant 1098 combined with antioxidant 168.

[0037] The defoamer can be BYK-1790 and / or BYK-1794. The wetting agent can be BYK-UV 3530 and / or EBECREL-436. The leveling agent can be BYK-1788 and / or BYK-361N.

[0038] To improve the overall curing efficiency of the impregnated fiberglass tubing, the prepreg also includes amino-modified upconversion nanoparticles, which account for 0.01-0.20 wt% of the total mass of the prepreg.

[0039] A method for preparing resin-impregnated fiberglass tubing includes the following steps: S1, Preparation of upconversion nanoparticles@glass fiber fabric; S2, UV prepreg preparation: Place 10-25 parts of polyurethane modified acrylate resin, 5-15 parts of epoxy modified acrylate resin, 40-70 parts of reactive diluent, 3-8 parts of polyisocyanate crosslinking agent, 0.8-1.6 parts of antioxidant, 0.05-0.20 parts of defoamer, 0.25-0.50 parts of wetting agent, 0.5-1.0 parts of leveling agent, and 1.0-2.5 parts of photoinitiator in a vacuum reactor. Under normal pressure, mechanically stir at 300-600 rpm for 5-15 minutes. Then, evacuate the reactor until the internal pressure is ≤100Pa. Perform vacuum degassing treatment for 15-30 minutes. After vacuum degassing treatment, purge with nitrogen to restore normal pressure. The UV prepreg is then discharged. S3. Apply UV prepreg onto release paper and pre-cure to form a gel-like UV prepreg film. The UV prepreg coating amount is 170-240 g / m². 2 ; S4, the gel-state UV prepreg film is hot-pressed onto the upper and lower surfaces of upconversion nanoparticles@glass fiber fabric A or upconversion nanoparticles@glass fiber fabric B, respectively, and then wound up and cut to obtain UV prepreg tape; S5. Apply the UV prepreg tape to the damaged area of ​​the pipe to be repaired. This will form a CIPP repair layer inside the pipe, with a thickness of 2.0-4.0 mm. After fixing the transparent ring mold, place it under a UV light source for 60-100 seconds. The unit light energy is 60-200 mW / cm², and the cumulative light energy is 500-7000 mJ / cm². Finally, cure it for 300-600 seconds under a laser irradiation of 45-90 W with a wavelength of 980-1020 nm. This will form a CIPP repair layer in the pipe and obtain the impregnated fiberglass pipe.

[0040] The application of UV prepreg tape, the fixing of the transparent annular mold, and the demolding can be performed using a pipeline robot. In this embodiment of the invention, which is a laboratory setting, the application of UV prepreg tape, the fixing of the transparent annular mold, and the demolding are performed manually on a 250mm long PPH pipe to be repaired.

[0041] In addition, high-strength PPH composite pipes can be directly produced using UV prepreg tape and PPH pipes. Specifically, UV prepreg tape is wrapped around the PPH pipe to form a reinforcing layer with a thickness of 2.0-4.0 mm. After being fixed in a transparent annular mold, it is cured under a UV light source for 60-100 seconds, with a unit light energy of 60-200 mW / cm² and a cumulative light energy of 500-7000 mJ / cm². Finally, it is cured under laser irradiation at 45-90 W with a wavelength of 980-1020 nm for 300-600 seconds to obtain a high-strength PPH composite pipe.

[0042] Preparation Example 1: A method for preparing upconversion nanoparticles@glass fiber fabric A, comprising the following steps: S1, Preparation of epoxy silanol aqueous solution: Anhydrous ethanol and deionized water are mixed at a mass ratio of 9:1 to form an alcohol aqueous solution. 2g of γ-glycidyl etheroxypropyltriethoxysilane KH561 is added to 100 parts by weight of alcohol aqueous solution and mixed well. Then, glacial acetic acid is added to adjust the pH value to 5 until the solution is completely dissolved and clear, thus obtaining KH561 alcohol aqueous solution. Preparation of aqueous dispersion of amino-modified upconversion nanoparticles: 0.04 parts by weight of boron trifluoride diethyl ether complex catalyst (CAS: 109-63-7) and 1 part by weight of amino-modified upconversion nanoparticles with catalog number Q-0374460 were dissolved in 999 parts by weight of deionized water and mixed evenly to obtain an aqueous dispersion of amino-modified upconversion nanoparticles with a concentration of 0.10 wt%. S2, SWR400 woven fabric from Nanjing Glass Fiber Research and Design Institute Co., Ltd. was soaked in KH561 alcohol aqueous solution, heated to 60℃, ultrasonically dispersed at 40kHz / 600W for 60min, drained and placed in a vacuum drying oven, vacuum pressure of 0.1Mpa, vacuum dried at 105℃ for 4h to obtain epoxy silane KH561 modified glass fiber fabric. S3, aminosilane KH561 modified glass fiber fabric was immersed in an aqueous dispersion of amino-modified upconversion nanoparticles with a concentration of 0.10 wt%, heated to 60℃, and ultrasonically dispersed at 40 kHz / 600 W for 60 min. After draining, it was placed in a vacuum drying oven with a vacuum pressure of 0.1 MPa and vacuum dried at 105℃ for 4 h to obtain upconversion nanoparticles@glass fiber fabric A, with an upconversion nanoparticle loading rate of 0.065 wt%.

[0043] Preparation Example 2: A method for preparing upconversion nanoparticles@glass fiber fabric B, comprising the following steps: S1, Preparation of aminosilanol aqueous solution: Anhydrous ethanol and deionized water are mixed at a mass ratio of 9:1 to form an alcohol aqueous solution. 2g of γ-aminopropyltriethoxysilane KH550 is added to 100 parts by weight of alcohol aqueous solution and mixed well. Then, glacial acetic acid is added to adjust the pH value to 4.0 until the solution is completely dissolved and clear and transparent to obtain KH550 alcohol aqueous solution. Preparation of an aqueous dispersion of carboxyl-modified upconversion nanoparticles: 0.06 parts by weight of catalyst DMAP (4-dimethylaminopyridine) and 1 part by weight of carboxyl-modified upconversion nanoparticles (UV light) with catalog number Q-0375498 were dissolved in 999 parts by weight of deionized water and mixed evenly to obtain an aqueous dispersion of carboxyl-modified upconversion nanoparticles with a concentration of 0.10 wt%. S2, SWR400 woven fabric from Nanjing Glass Fiber Research and Design Institute Co., Ltd. was soaked in KH550 alcohol aqueous solution, heated to 60℃, ultrasonically dispersed at 40kHz / 600W for 60min, drained and placed in a vacuum drying oven, vacuum pressure of 0.1Mpa, vacuum dried at 105℃ for 4h to obtain aminosilane KH550 modified glass fiber fabric. S3. The aminosilane KH550 modified glass fiber fabric was immersed in an aqueous dispersion of carboxyl-modified upconversion nanoparticles with a concentration of 0.10 wt%. The temperature was raised to 60℃, and the fabric was ultrasonically dispersed at 40 kHz / 600 W for 60 min. After draining, the fabric was placed in a vacuum drying oven with a vacuum pressure of 0.1 MPa and vacuum dried at 105℃ for 4 h to obtain upconversion nanoparticles@glass fiber fabric B with an upconversion nanoparticle loading rate of 0.054 wt%.

[0044] Example 1: A CIPP (Composite Injection Polypropylene) pipe includes a pipe to be repaired and a CIPP repair layer covering the pipe. The CIPP repair layer includes UV prepreg and upconversion nanoparticles@fiberglass fabric A as described in Example 1. The UV prepreg is made from the following raw materials in parts by weight: 15 parts T-7222 difunctional dual-curing polyurethane acrylate UV resin, 5 parts T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts epoxy acrylate 615T9XD11Q, 2 parts modified bisphenol A epoxy acrylate resin EBECRYL 3708, 15 parts hydroxyethyl methacrylate, 8 parts N,N-dimethylacrylamide, 25 parts isobornyl methacrylate, 10 parts bis(trimethylolpropane)tetraacrylate, 5 parts diphenyl methacrylate-2-hydroxyethyl phosphate, 5 parts 1,6-hexamethylene diisocyanate (HDI), 1.5 parts HDI trimer, 0.9 parts antioxidant 1010, 0.1 parts antioxidant 168, 0.10 parts defoamer BYK-1790, and 0.35 parts wetting agent BYK-UV. 3530, 0.65 parts leveling agent BYK-1788, 1.6 parts photoinitiator TPO, 0.8 parts photoinitiator 184.

[0045] A method for preparing resin-impregnated fiberglass tubing includes the following steps: Step 1, Preparation of UV Prepreg: Under light-protected conditions, combine 15 parts of T-7222 bifunctional dual-curing polyurethane acrylate UV resin, 5 parts of T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts of epoxy acrylate 615T9XD11Q, 2 parts of modified bisphenol A epoxy acrylate resin EBECRYL 3708, 15 parts of hydroxyethyl methacrylate, 8 parts of N,N-dimethylacrylamide, 25 parts of isoborneol methacrylate, 10 parts of bis(trimethylolpropane)tetraacrylate, 5 parts of 2-hydroxyethyl methacrylate diphenyl phosphate, 5 parts of 1,6-hexamethylene diisocyanate (HDI), 1.5 parts of HDI trimer, 0.9 parts of antioxidant 1010, 0.1 parts of antioxidant 168, 0.10 parts of defoamer BYK-1790, and 0.35 parts of wetting agent BYK-UV. 3530, 0.65 parts of leveling agent BYK-1788, 1.6 parts of photoinitiator TPO, and 0.8 parts of photoinitiator 184 were placed in a vacuum reactor and mechanically stirred at 360 rpm for 8 minutes under normal pressure. Then, a vacuum was drawn and vacuum degassing was performed for 30 minutes. Nitrogen was then introduced to restore normal pressure, and the UV prepreg was obtained by discharging the material. Step 2: Apply the UV prepreg prepared in Step 1 onto the release paper. The coating amount of UV prepreg is 170 g / m². 2 The film is placed in a dark environment and at room temperature for 24 hours to pre-cure and form a gel-like UV prepreg film. Step 3: The gel-state UV prepreg film is hot-pressed onto the upper and lower surfaces of the upconversion nanoparticles@glass fiber fabric A in Preparation Example 1, and then wound up and cut to obtain a UV prepreg tape with a thickness of 403 μm. Step four: Two 250mm long PPH pipe sections to be repaired are used as the UV prepreg tape repair targets. The outer diameter of the PPH pipes to be repaired is 150mm and the wall thickness is 14.6mm. A 200mm wide UV prepreg tape is attached to the inner splice of the two pipe sections to be repaired. Six circles of UV prepreg tape are attached to form a 2.42mm thick CIPP repair layer to be cured on the pipes to be repaired. After the transparent ring mold is fixed, it is placed under a ring LED light. First, it is cured with 254nm ultraviolet light for 30s, with a unit light energy of 100mW / cm². Then, it is cured with 365nm ultraviolet light for 60s, with a unit light energy of 60mW / cm², and a cumulative light energy of 6600mJ / cm. Finally, it is cured under 60W laser irradiation with a wavelength of 980nm for 480s. The CIPP repair layer is formed on the pipes to be repaired to obtain the impregnated fiberglass pipe.

[0046] The difference between Example 2 and Example 1 is that the upconversion nanoparticles@glass fiber fabric A in the preparation of Example 1 in the CIPP repair layer are replaced with the upconversion nanoparticles@glass fiber fabric B in the preparation of Example 2.

[0047] The difference in the preparation method of the impregnated glass fiber tube is that in step three, the gel-state UV prepreg film is hot-pressed onto the upper and lower surfaces of the upconversion nanoparticles@glass fiber fabric B in preparation example 2, and then wound and cut to obtain a UV prepreg tape with a thickness of 403μm. The remaining steps are the same.

[0048] The difference between Example 3 and Example 1 is that the UV prepreg is made from the following raw materials in parts by weight: 15 parts T-7222 difunctional dual-curing polyurethane acrylate UV resin, 5 parts T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts epoxy acrylate 615T9XD11Q, 2 parts modified bisphenol A epoxy acrylate resin EBECRYL 3708, 15 parts hydroxyethyl methacrylate, 8 parts N,N-dimethylacrylamide, 25 parts isobornyl methacrylate, 10 parts bis(trimethylolpropane)tetraacrylate, 5 parts diphenyl methacrylate-2-hydroxyethyl phosphate, 5 parts 1,6-hexamethylene diisocyanate (HDI), 1.5 parts HDI trimer, 0.9 parts antioxidant 1010, 0.1 parts antioxidant 168, 0.10 parts defoamer BYK-1790, and 0.35 parts wetting agent BYK-UV. 3530, 0.65 parts leveling agent BYK-1788, 1.6 parts photoinitiator TPO, 0.8 parts photoinitiator 184, and 0.1 parts amino-modified upconversion nanoparticles with product number Q-0374460.

[0049] The difference in the preparation method of impregnated fiberglass pipes lies in step one, the preparation of the UV prepreg: Under a light-protected environment, 15 parts of T-7222 bifunctional dual-curing polyurethane acrylate UV resin, 5 parts of T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts of epoxy acrylate 615T9XD11Q, and 2 parts of modified bisphenol A epoxy acrylate resin EBECRYL are mixed. 3708, 15 parts hydroxyethyl methacrylate, 8 parts N,N-dimethylacrylamide, 25 parts isobornyl methacrylate, 10 parts bis(trimethylolpropane)tetraacrylate, 5 parts diphenyl methacrylate-2-hydroxyethyl phosphate, 5 parts 1,6-hexamethylene diisocyanate (HDI), 1.5 parts HDI trimer, 0.9 parts antioxidant 1010, 0.1 parts antioxidant 168, 0.10 parts defoamer BYK-1790, 0.35 parts wetting agent BYK-UV 3530, 0.65 parts leveling agent BYK-1788, 1.6 parts photoinitiator TPO, 0.8 parts photoinitiator 184, and 0.1 parts amino-modified upconversion nanoparticles (product number Q-0374460) were placed in a vacuum reactor. Under normal pressure, the mixture was mechanically stirred at 360 rpm for 8 minutes. Then, a vacuum was applied until the internal pressure was ≤100 Pa. Vacuum degassing was performed for 30 minutes. After vacuum degassing, nitrogen was introduced to restore normal pressure, and the UV prepreg was obtained. Step four: Two 250mm long PPH pipe sections to be repaired were used as the UV prepreg tape repair targets. The outer diameter of the PPH pipes to be repaired was 150mm, and the wall thickness was 14.6mm. A 200mm wide strip was then used. A UV prepreg tape of m is attached to the inner joint of two sections of pipe to be repaired. Six layers of UV prepreg tape are attached to form a CIPP repair layer with a thickness of 2.42mm to be cured on the pipe. After the transparent ring mold is fixed, it is placed under a ring LED light. First, it is cured with 254nm UV light for 30s, with a unit light energy of 100mW / cm². Then it is cured with 365nm UV light for 60s, with a unit light energy of 60mW / cm², and a cumulative light energy of 6600mJ / cm. Finally, it is cured for 300s under 60W laser irradiation with a wavelength of 980nm. The CIPP repair layer is formed on the pipe to be repaired to obtain the impregnated fiberglass pipe. The remaining steps are the same.

[0050] The difference between Example 4 and Example 2 is that the UV prepreg was prepared from the following raw materials in parts by weight: 15 parts T-7222 difunctional dual-curing polyurethane acrylate UV resin, 5 parts T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts epoxy acrylate 615T9XD11Q, 2 parts modified bisphenol A epoxy acrylate resin EBECRYL 3708, 15 parts hydroxyethyl methacrylate, 8 parts N,N-dimethylacrylamide, 25 parts isobornyl methacrylate, 10 parts bis(trimethylolpropane)tetraacrylate, 5 parts diphenyl methacrylate-2-hydroxyethyl phosphate, 5 parts 1,6-hexamethylene diisocyanate (HDI), 1.5 parts HDI trimer, 0.9 parts antioxidant 1010, 0.1 parts antioxidant 168, 0.10 parts defoamer BYK-1790, and 0.35 parts wetting agent BYK-UV. 3530, 0.65 parts leveling agent BYK-1788, 1.6 parts photoinitiator TPO, 0.8 parts photoinitiator 184, and 0.1 parts amino-modified upconversion nanoparticles with product number Q-0374460.

[0051] The difference in the preparation method of impregnated fiberglass pipes lies in step one, the preparation of the UV prepreg: Under a light-protected environment, 15 parts of T-7222 bifunctional dual-curing polyurethane acrylate UV resin, 5 parts of T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, 4 parts of epoxy acrylate 615T9XD11Q, and 2 parts of modified bisphenol A epoxy acrylate resin EBECRYL are mixed. 3708, 15 parts hydroxyethyl methacrylate, 8 parts N,N-dimethylacrylamide, 25 parts isobornyl methacrylate, 10 parts bis(trimethylolpropane)tetraacrylate, 5 parts diphenyl methacrylate-2-hydroxyethyl phosphate, 5 parts 1,6-hexamethylene diisocyanate (HDI), 1.5 parts HDI trimer, 0.9 parts antioxidant 1010, 0.1 parts antioxidant 168, 0.10 parts defoamer BYK-1790, 0.35 parts wetting agent BYK-UV 3530, 0.65 parts leveling agent BYK-1788, 1.6 parts photoinitiator TPO, 0.8 parts photoinitiator 184, and 0.1 parts amino-modified upconversion nanoparticles (product number Q-0374460) were placed in a vacuum reactor. Under normal pressure, the mixture was mechanically stirred at 360 rpm for 8 minutes. Then, a vacuum was applied until the internal pressure was ≤100 Pa. Vacuum degassing was performed for 30 minutes. After vacuum degassing, nitrogen was introduced to restore normal pressure, and the UV prepreg was obtained. Step four: Two 250mm long PPH pipe sections to be repaired were used as the UV prepreg tape repair targets. The outer diameter of the PPH pipes to be repaired was 150mm, and the wall thickness was 14.6mm. A 200mm wide strip was then used. A UV prepreg tape of m is attached to the inner joint of two sections of pipe to be repaired. Six layers of UV prepreg tape are attached to form a CIPP repair layer with a thickness of 2.42mm to be cured on the pipe. After the transparent ring mold is fixed, it is placed under a ring LED light. First, it is cured with 254nm UV light for 30s, with a unit light energy of 100mW / cm². Then it is cured with 365nm UV light for 60s, with a unit light energy of 60mW / cm², and a cumulative light energy of 6600mJ / cm. Finally, it is cured for 300s under 60W laser irradiation with a wavelength of 980nm. The CIPP repair layer is formed on the pipe to be repaired to obtain the impregnated fiberglass pipe. The remaining steps are the same.

[0052] The difference between Comparative Example 1 and Example 1 is that the upconversion nanoparticles@glass fiber fabric A in the CIPP repair layer of Example 1 are replaced with epoxy silane KH561 modified glass fiber fabric SWR400 prepared in S2 of Example 1.

[0053] The difference between Comparative Example 2 and Comparative Example 1 is as follows: In step four, two 250mm long PPH pipe sections to be repaired are used as the objects of UV prepreg tape repair. The outer diameter of the PPH pipe to be repaired is 150mm and the wall thickness is 14.6mm. A 200mm wide UV prepreg tape is attached to the inner splice of the two pipe sections to be repaired. The UV prepreg tape is applied in three circles to form a 1.21mm thick CIPP repair layer A to be cured on the pipe to be repaired. Then, it is placed under a ring LED light and cured with 254nm UV light for 30s, with a unit light energy of 100mW / cm². After being fixed in a transparent ring mold, it is cured with 365nm UV light for 60s, with a unit light energy of 60mW / cm², and the cumulative light energy is 6600mJ / cm². 2 The process involves a single curing step to form CIPP repair layer A. Three layers of UV prepreg tape are then attached to CIPP repair layer A, creating a 1.21mm thick CIPP repair layer B to be cured. After being fixed in a transparent ring mold, the layer is placed under a ring-shaped LED light. First, it is cured with 254nm UV light for 30 seconds (100mW / cm²), then with 365nm UV light for 60 seconds (60mW / cm²), for a total cumulative light energy of 6600mJ / cm². 2 Finally, a CIPP repair layer with a wall thickness of 2.42mm was formed on the pipe to be repaired, and the impregnated fiberglass pipe was obtained.

[0054] The difference between Comparative Example 3 and Example 2 is that the upconversion nanoparticles@glass fiber fabric A in the CIPP repair layer of Example 1 are replaced with aminosilane KH550 modified glass fiber fabric SWR400 prepared in S2 of Example 2.

[0055] The difference between Comparative Example 4 and Comparative Example 3 is as follows: In step four, two 250mm long PPH pipe sections to be repaired are used as the objects of UV prepreg tape repair. The outer diameter of the PPH pipe to be repaired is 150mm, and the wall thickness is 14.6mm. A 200mm wide UV prepreg tape is attached to the inner splice of the two pipe sections to be repaired. Three circles of UV prepreg tape are attached to form a 1.21mm thick CIPP repair layer A to be cured on the pipe to be repaired. After the transparent ring mold is fixed, it is placed under a ring LED light. First, it is cured with 254nm UV light for 30s, with a unit light energy of 100mW / cm², and then cured with 365nm UV light for 60s, with a unit light energy of 60mW / cm², for a cumulative light energy of 6600mJ / cm². 2The process involves a single curing step to form CIPP repair layer A. Three layers of UV prepreg tape are then attached to CIPP repair layer A, creating a 1.21mm thick CIPP repair layer B to be cured. After being fixed in a transparent ring mold, the layer is placed under a ring-shaped LED light. First, it is cured with 254nm UV light for 30 seconds (100mW / cm²), then with 365nm UV light for 60 seconds (60mW / cm²), for a total cumulative light energy of 6600mJ / cm². 2 Finally, a CIPP repair layer with a wall thickness of 2.42mm was formed on the pipe to be repaired, and the impregnated fiberglass pipe was obtained.

[0056] Performance testing: 1. Curing performance test: First, the prepared impregnated fiberglass pipe is cut. Then, the cross-section of the CIPP repair layer of the cut impregnated fiberglass pipe is tested with a pencil hardness test (GB / T 6739), with the outer surface of the CIPP repair layer as the base point (surface hardness is Y). 表 Test point A is the center of the CIPP repair layer section (vertical distance from the base point is 1.21mm), test point B is 2.00mm vertically from the base point, and test point C is 2.40mm vertically from the base point. If ΔY1≤1.0%, ΔY1=(Y A -Y 表 ) 100 / Y 表 If the test point A is completely solidified, it is considered as √; otherwise, it is ×. If ΔY2≤1.0%, ΔY2=(Y B -Y 表 ) 100 / Y 表 If the test point B is completely solidified, it is considered as √; otherwise, it is ×. If ΔY3≤1.0%, ΔY3=(Y c -Y 表 ) 100 / Y 表 If the test point C is completely cured, it is considered that the CIPP repair layer is completely cured and recorded as √; otherwise, it is recorded as ×. If the test point C is completely cured, it is considered that the CIPP repair layer is completely cured.

[0057] 2. Pressure resistance test of impregnated fiberglass pipes: Run at a water pressure of 1.5MPa for 24 hours and observe whether there is water leakage at the repair site. If water leakage occurs, it is recorded as unqualified; if no water leakage occurs, it is recorded as qualified.

[0058] 3. Aging resistance test of impregnated fiberglass pipes: The pipes are placed in an aging test chamber for simulated aging test. After aging treatment at 85℃ / 80RH% for 1000h, a pressure test is performed. The pipes are run at a water pressure of 1.5MPa for 24h. The repair site is observed for water leakage. If water leakage occurs, the pipes are recorded as unqualified. If no water leakage occurs, the pipes are recorded as qualified.

[0059] 4. Tensile property test method for resin-impregnated fiberglass pipes: Conduct tensile tests according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Properties Test", and record the breaking tensile force (kN) at which the resin-impregnated fiberglass pipe breaks.

[0060] Table 1: Curing performance test parameters of CIPP repair layers in Examples 1-4 and Comparative Examples 1-4 Table 2: Water pressure resistance and aging resistance test parameters of the resin-impregnated fiberglass pipes in Examples 1-4 and Comparative Examples 1-4 Combining Examples 1 and Comparative Examples 1-2, Examples 2 and Comparative Examples 3-4, and Table 1-2, it can be seen that when upconversion nanoparticles are composited on the surface of fiberglass fabric to form upconversion nanoparticles@fiberglass fabric, after the CIPP repair layer to be cured has undergone the initial UV curing treatment, it is cured under laser irradiation with a wavelength of 980-1020nm. The upconversion nanoparticles loaded on the fiberglass fabric can convert the 980-1020nm light source into ultraviolet light, and perform a secondary complete curing treatment on the incompletely cured UV prepreg inside the CIPP repair layer, thereby improving the overall performance of the finally prepared impregnated fiberglass pipe and breaking through the thickness limitation of existing UV prepregs in one-time UV curing processes. Furthermore, comparing Examples 1 with Comparative Example 2 and Examples 2 with Comparative Example 4, it can be seen that the one-time UV curing process can avoid the risk of ultraviolet aging associated with multiple UV curing processes and extend the service life of the impregnated fiberglass pipe.

[0061] A comparison of Examples 1 and 3, Examples 2 and 4, and Tables 1-2 show that incorporating an appropriate amount of amino-modified upconversion nanoparticles into the UV prepreg can accelerate the curing efficiency. Under irradiation with a 60W laser at a wavelength of 980nm, the curing time is shortened from 480s to 300s. Furthermore, in terms of breaking tensile strength, the impregnated fiberglass pipe with an appropriate amount of amino-modified upconversion nanoparticles exhibits superior tensile mechanical properties. The main reason for this is that the amino-modified upconversion nanoparticles can improve the overall crosslinking density and thus the tensile mechanical properties of the impregnated fiberglass pipe. On the other hand, they can shorten the UV curing time and avoid UV aging caused by over-coating, thereby improving the tensile mechanical properties of the impregnated fiberglass pipe.

[0062] This invention has completed small-scale experimental testing, demonstrating that loading upconversion nanoparticles onto the surface of fiberglass fabric converts a 980-1020nm wavelength light source into ultraviolet light, thereby performing a secondary complete curing treatment on the incompletely cured UV prepreg inside the CIPP repair layer. Based on the above technology, the overall performance of the prepared impregnated fiberglass pipe can be improved, breaking through the thickness limitation of existing UV prepregs in one-step UV curing processes. With the mass production of upconversion nanoparticles, it is expected to be widely promoted and applied.

[0063] It should be noted that this specific embodiment is merely an explanation of the technical solution of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A type of impregnated fiberglass pipe, characterized in that: The device includes a pipe to be repaired and a CIPP repair layer covering the pipe. The CIPP repair layer comprises a UV prepreg and a fiberglass fabric. The surface of the fiberglass fabric is coated with upconversion nanoparticles. The upconversion nanoparticles account for 0.01-0.20 wt% of the total mass of the fiberglass fabric. The prepreg accounts for 40-50 wt% of the total mass of the fiberglass prepreg tape. The prepreg is made from the following raw materials in parts by weight: 10-25 parts polyurethane modified acrylate resin, 5-15 parts epoxy modified acrylate resin, 40-70 parts reactive diluent, 3-8 parts polyisocyanate crosslinking agent, 0.8-1.6 parts antioxidant, 0.05-0.20 parts defoamer, 0.25-0.50 parts wetting agent, 0.5-1.0 parts leveling agent, and 1.0-2.5 parts photoinitiator.

2. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The polyisocyanate crosslinking agent is at least one of 1,6-hexamethylene diisocyanate (HDI) and / or isoflurane diisocyanate (IPDI) combined with HDI dimer, HDI trimer, HDI biuret, and IPDI trimer.

3. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The active diluent is at least one of the following: hydroxyethyl methacrylate, N,N-dimethylacrylamide, N-acrylomorpholine, isobornyl methacrylate, 3-isobornylcyclohexyl acrylate, ethoxyethoxyethyl acrylate, propoxylated neopentyl glycol diacrylate, neopentyl glycol polymethyl ethylene oxide diacrylate, bis(trimethylolpropane)tetraacrylate, and 2-hydroxyethyl methacrylate diphenyl phosphate.

4. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The photoinitiator is a compound of a long-wavelength photoinitiator and a short-wavelength photoinitiator; the long-wavelength photoinitiator is at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator 784; the short-wavelength photoinitiator is at least one of photoinitiator 184, photoinitiator 1173, photoinitiator 2959, and photoinitiator MBF.

5. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The upconversion nanoparticles are rare-earth-doped fluorides, comprising a NaYF4 support and rare-earth ions doped into the NaYF4 support, wherein the rare-earth ions are Yb. 3+ Paired with Er 3+ Ho 3+ Tm 3+ At least one of them.

6. The resin-impregnated fiberglass pipe according to claim 5, characterized in that: If the glass fiber fabric is an aminosilane-modified glass fiber fabric or an epoxysilane-modified glass fiber fabric, then the upconversion nanoparticles are carboxyl-modified upconversion nanoparticles; if the glass fiber fabric is an epoxysilane-modified glass fiber fabric, then the upconversion nanoparticles are amino-modified upconversion nanoparticles.

7. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The prepreg further includes amino-modified upconversion nanoparticles, which account for 0.01-0.20 wt% of the total mass of the prepreg.

8. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The polyurethane-modified acrylate resin is a polyurethane-modified acrylate resin with hydroxyl side chains, selected from at least one of T-7000 difunctional polyurethane UV resin, T-7010N difunctional polyurethane UV resin, T-7222 difunctional dual-curing polyurethane acrylate UV resin, T-7135 difunctional polyurethane UV resin, T-7224 tetrafunctional dual-curing polyurethane acrylate UV resin, and T-7150 tetrafunctional polyurethane UV resin.

9. The resin-impregnated fiberglass pipe according to claim 1, characterized in that: The epoxy-modified acrylate resin is at least one of epoxy acrylate 615T9XD11Q, epoxy-modified acrylate resin CR90426, and modified bisphenol A epoxy acrylate resin EBECRYL 3708.

10. A method for preparing a resin-impregnated fiberglass tube according to any one of claims 1-9, characterized in that: Includes the following steps: S1, Preparation of upconversion nanoparticles@glass fiber fabric; S1.1, The fiberglass fabric is placed in an aqueous solution of aminosilanol or an aqueous solution of epoxysilanol, and after soaking and drying, aminosilane-modified fiberglass fabric or epoxysilane-modified fiberglass fabric is obtained. S1.2, If the epoxy silane modified glass fiber fabric is placed in an aqueous dispersion of upconversion nanoparticles, the upconversion nanoparticle content in the aqueous dispersion of upconversion nanoparticles is 0.01-0.10 wt%, and the upconversion nanoparticles are amino-modified upconversion nanoparticles and / or carboxyl-modified upconversion nanoparticles. After soaking and drying, upconversion nanoparticles@glass fiber fabric A are obtained. If the aminosilane-modified glass fiber fabric is placed in an aqueous dispersion of carboxyl-modified upconversion nanoparticles, wherein the content of carboxyl-modified upconversion nanoparticles in the aqueous dispersion is 0.01-0.10 wt%, and the upconversion nanoparticles are obtained by soaking and drying to obtain glass fiber fabric B; S2, UV prepreg preparation: Place 10-25 parts of polyurethane modified acrylate resin, 5-15 parts of epoxy modified acrylate resin, 40-70 parts of reactive diluent, 3-8 parts of polyisocyanate crosslinking agent, 0.8-1.6 parts of antioxidant, 0.05-0.20 parts of defoamer, 0.25-0.50 parts of wetting agent, 0.5-1.0 parts of leveling agent, and 1.0-2.5 parts of photoinitiator in a vacuum reactor. Under normal pressure, mechanically stir at 300-600 rpm for 5-15 min, then vacuum degas for 15-30 min, purge with nitrogen to restore normal pressure, and discharge to obtain UV prepreg. S3. Apply UV prepreg onto release paper and pre-cure to form a gel-state UV prepreg film. The UV prepreg coating amount is 170-240 g / m². 2 ; S4, the gel-state UV prepreg film is hot-pressed onto the upper and lower surfaces of upconversion nanoparticles@glass fiber fabric A or upconversion nanoparticles@glass fiber fabric B, respectively, and then wound up and cut to obtain UV prepreg tape; S5. Apply the UV prepreg tape to the damaged area of ​​the pipe to be repaired to form a CIPP repair layer to be cured. The thickness of the CIPP repair layer to be cured is 2.0-4.0mm. Then, place it under a UV light source for 60-100s to cure. The unit light energy is 60~200mW / cm², and the cumulative light energy is 5000-7000mJ / cm. Finally, cure it under a laser irradiation of 45-90W with a wavelength of 980-1020nm for 300-600s to form a CIPP repair layer on the pipe to be repaired and obtain the impregnated fiberglass pipe.

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