Rapid curing material based on bio-based material as well as preparation method and application of rapid curing material

Abstract

The invention relates to the technical field of civil engineering materials, in particular to a rapid curing material based on a bio-based material and a preparation method and application of the rapid curing material. The rapid curing material comprises the following raw materials in parts by weight: 70-80 parts of a basic bio-based polymer, 9-15 parts of a curing accelerator, 20-30 parts of a plant source modified polymer and 9-15 parts of a reinforcing agent, the basic bio-based polymer comprises the following raw materials: a bacillus strain and a culture medium; the bacillus strain comprises bacillus amyloliquefaciens; the culture medium comprises a yeast extract and a carbon source. By optimizing a bio-based material preparation process and constructing a multi-path synergistic curing system, a rapid, environment-friendly and high-performance curing effect is achieved, and the technical blank of efficient application of bio-based materials in the field of civil engineering is filled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering materials, in particular to a rapid curing material based on bio-based materials and a preparation method and application thereof. BACKGROUND

[0002] In the field of civil engineering materials, curing technology is the core link to ensure the strength and stability of the structure. The existing curing materials and technologies are mainly divided into two categories: chemical synthetic material system and early bio-based material system. There are the following outstanding problems: traditional curing materials are mainly cement, epoxy resin and polyurethane. The carbon emission in the production process of cement-based materials is extremely high. According to the data published in the journal Nature in 2020, Concrete: the most destructive material on Earth (DOI: 10.1038 / d41586-019-03712-w), its production contributes to 8% of global CO2 emissions, and the curing period is as long as 7-28 days, which seriously restricts the construction efficiency. Although the epoxy resin material has a faster curing speed (24-48 hours), it relies on petroleum-based raw materials, and the volatile VOCs (such as epoxy chloropropane) are harmful to human health. On the other hand, bio-based materials often rely on a single curing approach (such as only thermal curing or chemical crosslinking), and the proportion of curing accelerators is not reasonable, either too much leading to a decline in material performance, or too little resulting in poor curing effect, which seriously affects the curing efficiency and final performance of bio-based materials, and limits their large-scale application in actual engineering.

[0003] With the increasing emphasis on ecological environmental protection around the world, and the development of civil engineering towards high difficulty, high performance and long service life, higher requirements are put forward for curing materials and technologies. The existing curing materials and technologies have the problems of high carbon emission, dependence on non-renewable resources, harm to human health, and single curing performance, which have become an important bottleneck restricting the sustainable development of the civil engineering industry. It is urgent to develop new bio-based curing materials and technologies that are environmentally friendly, efficient and high-performance. SUMMARY

[0004] In view of the problems of "high carbon emission, slow curing speed, insufficient environmental protection, and single performance" in the prior art, the preparation process of bio-based materials is optimized, and a multi-pathway synergistic curing system is constructed to achieve rapid, environmentally friendly and high-performance curing effect, filling the technical gap of efficient application of bio-based materials in the field of civil engineering.

[0005] The technical solution of the present application is as follows:

[0006] In a first aspect, a fast-curing material based on a bio-based material is provided, the fast-curing material comprising the following raw materials by weight: 70-80 parts by weight of a base bio-based polymer, 9-15 parts by weight of a curing promoter, 9-15 parts by weight of a reinforcing agent;

[0007] The base bio-based polymer comprises 40-50 parts by weight of a microbially fermented synthetic bio-polymer, 20-30 parts by weight of a plant-derived modified polymer;

[0008] The raw materials of the microbially fermented synthetic bio-polymer comprise: a Bacillus strain, a culture medium;

[0009] The Bacillus strain comprises Bacillus amyloliquefaciens;

[0010] The culture medium comprises yeast extract, a carbon source.

[0011] The Bacillus amyloliquefaciens can form a hydrogen-bonding network with the polymer of the present application, for improving the performance of the material.

[0012] As a specific embodiment of the present application, the curing promoter comprises at least one of a calcium ion-organic complex, β-glycerophosphate disodium, a polyisocyanate, a catechol grafted modified chitosan, and a composite photoinitiator; preferably, the composite photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl-1-propanone and an iodonium salt.

[0013] As a specific embodiment of the present application, the plant-derived modified polymer comprises a polymer containing a double bond and a phenolic hydroxyl group; preferably, the plant-derived modified polymer comprises a cardanol-based polymer and a tung oil-based urushiol compound.

[0014] The tung oil-based urushiol compound mentioned in the Mycosil paint can be a tung oil-based urushiol compound prepared by a Friedel-Crafts alkylation reaction of a bio-based catechol extracted from a plant and tung oil or a plant oil ester tung oil acid containing a double bond and a phenolic hydroxyl group.

[0015] As a specific embodiment of the present application, the reinforcing agent comprises at least one of a fiber and silicon dioxide; preferably, the fiber is bamboo fiber and / or hemp fiber, and more preferably, the fiber is alkali-treated bamboo fiber with a length of 5-10 mm; preferably, the silicon dioxide is nano-silicon dioxide, and more preferably, the nano-silicon dioxide has a particle size of 20-50 nm.

[0016] As a specific embodiment of the present application, the culture medium further comprises: a phosphorus source, trace elements; preferably, the culture medium comprises the following raw materials: yeast extract, a carbon source, a phosphorus source, a trace element mixture, and water; the addition amount ratio of the yeast extract, the carbon source, the phosphorus source, the trace element mixture, and the water is: 10-15 g: 20-30 g: 1-2 g: 0.1-0.5 mL: 1000 g.

[0017] As a specific embodiment of the present application, the culture medium further comprises magnesium sulfate, ammonium chloride; preferably, the ratio of the amount of magnesium sulfate, ammonium chloride added to water is 0.5-1 g:0.5-1 g:1000 g.

[0018] As a specific embodiment of the present application, the carbon source comprises a sugar; preferably glucose.

[0019] As a specific embodiment of the present application, the phosphorus source comprises at least one of sodium dihydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate; preferably potassium dihydrogen phosphate.

[0020] As a specific embodiment of the present application, the trace elements comprise iron salts, manganese salts, zinc salts.

[0021] As a specific embodiment of the present application, the preparation method of the base bio-based polymer comprises:

[0022] (1) configuring a culture medium, adjusting the pH to 7.2±0.5; inoculating a Bacillus strain and fermenting;

[0023] (2) centrifuging the fermentation broth of step (1), ultrafiltrating, adding ethanol to the ultrafiltration filtrate, precipitating the bio-polymer, and drying to obtain a microbial fermentation synthesized bio-polymer powder;

[0024] (3) reacting the microbial fermentation synthesized bio-polymer powder of step (2) with a plant source modified polymer to obtain a base bio-based polymer.

[0025] As a specific embodiment of the present application, the fermentation conditions of step (1) comprise an inoculation amount of 1-8%; a fermentation temperature of 25-40℃; a fermentation aeration amount of 0.5-2vvm; and a fermentation time of 30-80h.

[0026] As a specific embodiment of the present application, sterile gas containing oxygen with a content of ≥20% is introduced during fermentation.

[0027] As a specific embodiment of the present application, sterile gas containing oxygen with a content of 20%-40% is introduced.

[0028] By continuously supplying oxygen, the activity and metabolic efficiency of the strain are maintained, and the high yield of bio-based polymers is ensured.

[0029] As a specific embodiment of the present application, the ultrafiltration conditions of step (2) comprise using a polymer membrane with a molecular weight cut-off of ≥10000 Da, and ultrafiltrating under a pressure of 0.1-0.2 MPa.

[0030] As a specific embodiment of the present application, the drying of step (2) comprises freeze-drying; preferably vacuum freeze-drying.

[0031] As a specific embodiment of the present application, the reaction conditions of step (3) include: reaction temperature: 50-70℃; reaction time: 20-60min.

[0032] In a second aspect, the application provides a method for preparing the above-mentioned rapid curing material based on bio-based material, characterized in that it comprises the following steps: adding a curing agent promoting factor and a reinforcing agent to the base bio-based polymer, and stirring to obtain the rapid curing material based on bio-based material.

[0033] As a specific embodiment of the present application, the stirring conditions include a stirring temperature of 45-65℃ and a stirring time of 10-40min.

[0034] In a second aspect, the application provides the use of the above-mentioned rapid curing material based on bio-based material or the rapid curing material prepared by the above-mentioned method as a curing agent in civil engineering.

[0035] As a specific embodiment of the present application, if used for curing large-area flat structures, the curing promoter is selected from a calcium ion-organic complex and a composite photoinitiator.

[0036] As a specific embodiment of the present application, if used for curing complex-shaped structures, the curing promoter is selected from a calcium ion-organic complex, a catechol grafted modified chitosan, and a beta-glycerophosphate disodium.

[0037] As a specific embodiment of the present application, if used for emergency repair curing, the curing promoter is selected from a calcium ion-organic complex and a polyisocyanate crosslinking agent.

[0038] As a specific embodiment of the present application, the curing time is less than or equal to 10min.

[0039] As a specific embodiment of the present application, it further comprises irradiating the coating on the construction base surface with an ultraviolet lamp during construction.

[0040] Advantages of the present application

[0041] By using a full bio-based material system, replacing traditional chemically synthesized materials, carbon emissions and harmful substance emissions during production and use are reduced, solving the problem of high pollution and high carbon emissions of traditional materials. The construction of a multi-path rapid curing process significantly shortens the curing time, among which the light curing time is 2-3 minutes, the heat curing time is 2-3 minutes, and the chemical crosslinking curing time is the fastest 2 minutes, effectively breaking through the bottleneck of slow curing speed of existing bio-based materials.

[0042] Three curing processes are suitable for large-area planar structures, complex-shaped structures, and emergency repair, etc. in different scenarios, overcoming the limitations of single curing approach. The optimized medium formula and extraction process increase the yield of biopolymer by 80%, and the purity is above 98%, improving the preparation efficiency and purity of bio-based materials, and providing high-quality raw material guarantee for efficient curing. The overall scheme realizes the rapid, environmentally friendly and high-performance application of bio-based materials in civil engineering, meeting the needs of different construction scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0043] One or more embodiments are illustrated by way of example in the accompanying drawings, which are not intended to be limiting of the embodiments, the drawings show embodiments in which like reference numerals refer to like elements, the drawings are not necessarily to scale, and in which:

[0044] Figure 1 Flow chart for preparing the bio-based rapid curing material of the present application;

[0045] Figure 2 Schematic diagram of the light curing system structure and construction process of the present application;

[0046] Figure 3 Schematic diagram of the phase change of the heat curing system of the present application;

[0047] Figure 4 Reaction schematic diagram of the chemical glue joint curing system of the present application. DETAILED DESCRIPTION

[0048] In order to be able to understand the features and technical contents of the embodiments of the present application more fully, the implementation of the embodiments of the present application will be described in detail below in conjunction with the drawings, which are only used for reference and do not limit the embodiments of the present application. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to show.

[0049] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0050] The term "and / or" is a description of the association relationship of the objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0051] Figure 1 The preparation process of bio-based material from strain fermentation to final solidification system is shown. The bacillus strain is cultured by optimizing the culture medium (containing yeast extract, glucose, etc.); the fermentation broth is centrifuged by a centrifugal device to remove the bacterial bodies, and then filtered by an ultrafiltration membrane device to remove small molecular impurities, and then precipitated by an organic solvent in a precipitation reaction kettle to obtain a bio-based polymer; the polymer is mixed with a solidification promoter (such as calcium ion-EDTA complex) in a mixing and stirring tank, and an alkali-treated natural fiber (bamboo fiber / ramie fiber) is added, and finally the formed rapid solidification system is stored in a solidification system storage tank.

[0052] Preparation of base bio-based polymer in Example 1

[0053] (1) Preparation of microbial fermentation synthesized bio-polymer

[0054] The bacillus strain is bacillus amyloliquefaciens KN-527 from Wuhan Konno Biotechnology Co., Ltd.

[0055] According to the culture medium formula, 12 g of yeast extract, 25 g of glucose, 1.5 g of potassium dihydrogen phosphate, 0.8 g of magnesium sulfate, and 0.7 g of ammonium chloride are weighed, 1 L of deionized water is added, 0.3 mL of trace element mixed solution (containing 0.01 g / L of FeSO4·7H2O, 0.005 g / L of MnSO4·H2O, and 0.005 g / L of ZnSO4·7H2O) is added, and after stirring and dissolving, the pH is adjusted to 7.2. The culture medium is transferred to a fermentation tank, and the bacillus strain to be screened (inoculation amount 5%) is inoculated, and fermented at 32°C, stirring speed 220 r / min, and aeration amount 1.2 vvm for 48 h; sterile gas containing 30% oxygen is passed through the fermentation. The growth rate and viable cell count of the strain are determined to screen strains that can grow well in the culture medium. Strains that grow slowly or cannot effectively utilize carbon sources (glucose) or nutrients in the culture medium are eliminated.

[0056] After fermentation is completed, the fermentation broth is centrifuged at 5500 r / min for 18 minutes to remove the bacterial bodies and impurities; the supernatant is ultrafiltered through a polyether sulfone membrane with a molecular weight cutoff of 10000 Da under a pressure of 0.15 MPa; 3.5 times the volume of anhydrous ethanol is added to the ultrafiltration filtrate, which is placed at 4°C for 14 hours, and the precipitated bio-polymer is vacuum freeze-dried at -40°C and 0.01 mbar to obtain a high-purity powder, which is a microbial fermentation synthesized bio-polymer;

[0057] (2) Preparation of plant source modified polymer

[0058] C Cashew phenol-based polymer (containing double bonds and phenolic hydroxyl groups) is taken and purified by vacuum distillation for standby use.

[0059] The cardanol-based polymer can adopt a bio-based laccol compound prepared by a Friedel-Crafts alkylation reaction of a bio-based catechol extracted from plants and a bio-based plant oil, such as a bio-based plant oil, or a bio-based plant oil ester, such as a bio-based tung oil or a bio-based tung oil acid;

[0060] (3) Synthesis of the base bio-based polymer

[0061] The cardanol-based polymer is placed in a rotary evaporator and distilled at a vacuum degree of 0.08-0.09 MPa and a temperature of 80-100°C for 2-3 hours to remove low-boiling impurities (such as residual solvents and small-molecule monomers); a fraction collected at 180-220°C / 0.01 MPa is a purified cardanol-based polymer (purity ≥ 95%, acid value ≤ 5 mg KOH / g); the purified product needs to be stored in the dark and under nitrogen protection to prevent oxidation and polymerization.

[0062] The cardanol-based polymer has a structural formula as shown in Formula I

[0063]

[0064] The bio-based polymer synthesized by microbial fermentation (75 parts) and the plant source modified polymer (25 parts) are weighed by mass fraction, added to a stirring tank, and stirred at 60°C and a rotation speed of 300 r / min for 30 minutes to form a uniform base bio-based polymer.

[0065] During construction, the coating on the construction base is irradiated with a UV lamp to induce the polymerization of phenolic hydroxyl radicals and the copolymerization of double bonds in the bio-based polymer.

[0066] Example 2: Implementation scheme of the photocuring process

[0067] The base bio-based polymer prepared according to Example 1: composite photoinitiator = 20:1 (mass ratio) of materials are weighed;

[0068] The composite photoinitiator is Darocur 1173 (CAS#: 7473-98-5): 1-methylpyridine iodide (CAS#: 930-73-4) = 3:1 (mass ratio).

[0069] 200 g of the base bio-based polymer is mixed with 15 g of a curing accelerator (5 g of a calcium ion-EDTA complex and 10 g of a composite photoinitiator) in a mixing and stirring tank, and 8 g of alkali-treated natural fibers (bamboo fibers) are added at the same time, and finally a fast-curing material is formed; the material is coated on a pretreated (smoothed and cleaned) building floor, and the coating thickness is controlled to be 1-2 mm.

[0070] The UV light lamp with wavelength of 365 nm and power of 3000 W is used to irradiate the coating surface at a distance of 20 cm for 2.5 minutes. During the irradiation process, the phenolic hydroxyl group in the system is decomposed into free radicals, which initiates the synergistic polymerization of carbon-carbon double bond and epoxy group, forming a three-dimensional cross-linked structure.

[0071] Figure 2 It is illustrated that the light-active bio-based polymer containing double bond and phenolic hydroxyl group forms a mixed system with the composite photoinitiator and dispersed natural fibers; during construction, the coating on the construction base surface is irradiated by a UV light lamp to initiate the free radical polymerization of phenolic hydroxyl group and the double bond copolymerization in the bio-based polymer.

[0072] Example 3: Thermal curing process implementation scheme

[0073] The materials are weighed according to the base bio-based polymer: resorcinol grafted and modified chitosan: β-glycerophosphate disodium = 7:2:1 (mass ratio), and deionized water is added to form a paste (solid content 40%), and stirred until there are no particles.

[0074] 200g base bio-based polymer is mixed with 85.7g curing accelerator (10g calcium ion-EDTA complex, 57.1g resorcinol grafted and modified chitosan, 28.6g β-glycerophosphate disodium) in a mixing tank, while 8g of alkali treated natural fibers (bamboo fiber / hemp fiber) are added, and finally a rapid curing material is formed; the material is filled into the crack (width 0.5-2mm), and a hot air gun is used to heat at 35℃ for 2.5 minutes, and the resorcinol group is oxidized to form a quinone structure, which is cross-linked with unoxidized molecules to form a gel state.

[0075] Figure 3 It is illustrated that the resorcinol grafted and modified chitosan and β-glycerophosphate disodium form a liquid mixed system at low temperature; when heated to 30-40℃ using a hot air gun, the resorcinol in the resorcinol grafted and modified chitosan is oxidized to form a quinone structure, which is cross-linked with unoxidized molecules to form a gel state solidified body.

[0076] Example 4: Chemical cross-linking curing process implementation scheme

[0077] The materials are weighed according to the base bio-based polymer: polyisocyanate cross-linking agent = 1:1.2 (molar ratio).

[0078] 200g base bio-based polymer was mixed with 245g curing accelerator (5g calcium ion-EDTA complex, 240g polyisocyanate crosslinking agent) in a mixing tank, while 8g alkali-treated natural fibers (hemp fibers) were added, mixed by two-component spray gun (mixing time < 20 seconds), at this time the system temperature rose to 30℃ due to reaction heat; the mixed material was injected into the crack (width 2-4mm), and cured at room temperature (25℃) for 6 minutes, the isocyanate group reacted with carboxyl and hydroxyl group to form urea bond and ester bond, and the curing was completed; if the ambient temperature is lower than 15℃, heating to 50℃ can accelerate the curing, which can be completed in 2 minutes.

[0079] Figure 4 Description: The base bio-based polymer and the polyisocyanate crosslinking agent were mixed in a mixing device at a molar ratio of 1:1-1.5:1, and the carboxyl / hydroxyl group of the bio-based polymer containing carboxyl / hydroxyl group reacted with the isocyanate group of the polyisocyanate crosslinking agent to form covalent bond under room temperature / micro-heat conditions, so that the system was rapidly cured.

[0080] Example 4

[0081] The base bio-based polymer prepared in Example 1 was added to different types of curing accelerators and reinforcing phases, and stirred for 20 minutes to be uniform, and the temperature of the mixed system was controlled at 50-60℃; the obtained material was detected for bending strength and elongation at break, and the results are shown in Table 1.

[0082] The bending strength test was performed on a WDW-20 universal material testing machine, and the loading speed was 50N / s; the elongation at break test was performed on a CMT6104 electronic tensile testing machine, and the tensile speed was 500mm / min, and the test results were the average value of 5 samples.

[0083] Table 1 Property analysis of different curing materials

[0084]

[0085]

[0086] Note: * The base bio-based polymer is the base bio-based polymer prepared in Example 1.

[0087] The above only describes the preferred examples of the present application. It should be noted that for those skilled in the art, under the technical inspiration provided by the present application, other equivalent variants and improvements as the common knowledge in the art can also be made, and should be considered as the protection scope of the present application.

Claims

1. A fast-curing material based on a bio-based material, characterized in that, The fast curing material comprises raw materials in the following weight parts: 70-80 parts by weight of a base bio-based polymer, 9-15 parts by weight of a curing accelerator, 9-15 parts by weight of a reinforcing agent; The base bio-based polymer comprises 40-50 parts by weight of a microorganism fermentation synthesized bio-polymer, 20-30 parts by weight of a plant source modified polymer; The raw materials of the microorganism fermentation synthesized bio-polymer comprise Bacillus strains and culture medium; The Bacillus strains comprise Bacillus amyloliquefaciens; The culture medium comprises yeast extract and carbon source.

2. The rapid-curing material based on a bio-based material according to claim 1, characterized in that, The curing accelerator comprises at least one of calcium ion-organic complex, β-glycerophosphate disodium, polyisocyanate, hydroquinone grafted modified chitosan and composite photoinitiator; preferably, the composite photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl-1-propanone and iodonium salt; And / or, the plant source modified polymer comprises a polymer containing double bond and phenolic hydroxyl; preferably, the plant source modified polymer comprises cashew phenol-based polymer or tung oil-based urushiol compound; And / or, the reinforcing agent comprises at least one of fiber and silicon dioxide; preferably, the fiber is bamboo fiber and / or hemp fiber, more preferably, the fiber is alkali-treated bamboo fiber with a length of 5-10 mm; preferably, the silicon dioxide is nano-silicon dioxide, more preferably, the nano-silicon dioxide has a particle size of 20-50 nm; And / or, the culture medium further comprises phosphorus source and trace elements; preferably, the culture medium comprises the following raw materials: yeast extract, carbon source, phosphorus source, trace element mixture and water; the adding amount ratio of the yeast extract, carbon source, phosphorus source, trace element mixture and water is 10-15 g: 20-30 g: 1-2 g: 0.1-0.5 mL: 1000 g.

3. The fast-curing material based on a bio-based material according to claim 1 or 2, c h a r a c t e r i z e d in that The culture medium further comprises magnesium sulfate and ammonium chloride; preferably, the adding amount ratio of the magnesium sulfate, ammonium chloride and water is 0.5-1 g: 0.5-1 g: 1000 g; And / or, the carbon source comprises sugar; preferably, the sugar is glucose; And / or, the phosphorus source comprises at least one of sodium dihydrogen phosphate, ammonium dihydrogen phosphate and potassium dihydrogen phosphate; preferably, the phosphorus source is potassium dihydrogen phosphate; And / or, the trace elements comprise iron salt, manganese salt and zinc salt.

4. The rapid-curing bio-based material-based material according to any one of claims 1 - 3, c h a ra cte ri zed in that The preparation method of the base bio-based polymer comprises: (1) configuring culture medium and adjusting pH to 7.2±0.5; inoculating Bacillus strains and fermenting; (2) centrifuging the fermentation liquid of step (1), ultrafiltrating, adding ethanol to the ultrafiltration filtrate, precipitating bio-polymer and drying to obtain microorganism fermentation synthesized bio-polymer powder; (3) reacting the microorganism fermentation synthesized bio-polymer powder of step (2) with plant source modified polymer to obtain base bio-based polymer.

5. The rapid-curing material based on a bio-based material according to claim 4, characterized in that, The fermentation conditions of step (1) comprise: inoculation amount of 1-8%; fermentation temperature of 25-40℃; fermentation aeration amount of 0.5-2vvm; fermentation time of 30-80h; preferably, sterile gas containing oxygen with an oxygen content of ≥20% is introduced; more preferably, sterile gas containing oxygen with an oxygen content of 20%-40% is introduced; And / or, the condition of step (2) ultrafiltration includes using polymer membrane with molecular weight cut-off ≥10000 Da, ultrafiltration under 0.1-0.2 MPa pressure; And / or, the drying of step (2) includes freeze-drying; preferably vacuum freeze-drying; And / or, the condition of step (3) reaction includes: reaction temperature: 50-70℃; reaction time: 20-60 min.

6. A method for producing a rapid-curing material based on a bio-based material according to any one of claims 1 to 5, characterized in that, Comprising the following steps: Adding curing agent promoting factor and reinforcing agent to the base bio-based polymer, stirring to obtain the fast curing material of bio-based material.

7. The production method according to claim 6, wherein The condition of stirring includes stirring temperature 45-65℃, stirring time 10-40 min.

8. The fast curing material based on bio-based material of any one of claims 1-5 or the fast curing material prepared by the method of claim 7 or 8 as curing agent in civil engineering.

9. Use according to claim 8, characterized in that, If used for curing large-area flat structure, the curing promoter is selected from calcium ion-organic complex and composite photoinitiator; And / or, if used for curing complex shape structure, the curing promoter is selected from calcium ion-organic complex, hydroquinone grafted modified chitosan and β-glycerophosphate disodium; And / or, if used for emergency repair curing, the curing promoter is selected from calcium ion-organic complex and polyisocyanate crosslinking agent.

10. Use according to claim 8 or 9, characterized in that, The curing time is less than or equal to 10 min; And / or, further comprising irradiating the coating on the construction base surface with ultraviolet lamp during construction.

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