High-strength antibacterial pbo fiber
By forming a multilayer composite structure of silicon oxide and antibacterial metal on the surface of PBO fibers, the problem of easy peeling of the antibacterial coating on the surface of PBO fibers is solved, achieving efficient and stable antibacterial effect and uniform coating, which is suitable for mass production applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU XINCHEN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-06-12
Smart Images
Figure CN224350856U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a high-strength antibacterial PBO fiber, specifically an antibacterial fiber with PBO fiber as the base material, belonging to the field of high-performance fiber composite material technology. Background Technology
[0002] PBO fiber (poly(p-phenylenebenzodioxazole) fiber) is a high-performance organic fiber renowned for its excellent mechanical properties and outstanding heat resistance. However, its antibacterial function usually requires the introduction of antibacterial agents through modification or finishing processes. However, due to the strong chemical inertness and low polarity of the PBO fiber surface, most antibacterial agents (especially inorganic antibacterial agents such as silver ions and nano-ZnO) are difficult to adhere firmly through conventional methods.
[0003] In the prior art, Chinese patent CN111500991A discloses a method for preparing silver-plated antibacterial fabric. First, the fabric surface undergoes a modification pretreatment using oxygen or nitrogen as the modification reaction gas. In a vacuum environment, a plasma power source is used for modification. After modification, a sputtering reaction gas is introduced, and a silver alloy is used as the target material. A plasma power source is then activated to perform sputtering deposition, obtaining silver-plated antibacterial fibers with a coating thickness of no more than 200 nm. The coating is uniform and exhibits strong antibacterial ability. However, when this technology is applied to PBO fibers, the strong chemical inertness of the fiber surface leads to insufficient stability of the metal coating, making it prone to peeling and severely affecting the durability of the antibacterial effect.
[0004] In addition, Chinese patent CN213571292U discloses a colored antibacterial fabric that uses magnetron sputtering roll-to-roll coating technology to deposit an antibacterial layer and a buffer layer on the fiber surface. The antibacterial layer includes TiNO. X The membrane layer can be TiO2, ZnO, stainless steel nitride, AZO, copper, silver-titanium alloy, copper-titanium alloy, copper-zinc alloy, or titanium-aluminum alloy. A buffer layer is positioned between the fiber surface and the antibacterial layer. The buffer layer may include TiAlN or TiNO3. X Films made of NiCr, TiN, Ti, stainless steel, or oxynitride stainless steel can provide a strong bond between the antibacterial layer and the plant, preventing it from detaching and offering long-lasting antibacterial benefits. However, the unique surface properties of PBO fibers result in poor interfacial compatibility with these traditional buffer layer materials, leading to unsatisfactory coating adhesion and antibacterial effects.
[0005] Therefore, sputtering coating technology, due to its efficient and uniform film-forming characteristics, has been widely used in the surface antibacterial treatment of fibers such as polyester and cotton. However, the unique properties of PBO fibers (such as strong surface chemical inertness, low polarity, and excellent high-temperature resistance) impose special requirements on traditional antibacterial coatings. For example, conventional antibacterial metals (such as Ag and Cu) are difficult to form stable chemical bonds with the PBO surface, resulting in poor chemical compatibility. Therefore, to match the characteristics of PBO fibers, this invention proposes a novel antibacterial coating based on PBO fibers. Utility Model Content
[0006] The purpose of this invention is to provide a high-strength antibacterial PBO fiber. By sequentially depositing a silicon oxide layer and an antibacterial metal coating on the PBO fiber, the silicon oxide layer not only improves the bonding ability between the silver layer and the PBO fiber substrate, making the antibacterial metal coating less prone to peeling off, but also improves the dispersion of antibacterial metal coating crystals on its surface, resulting in a uniform coating and higher antibacterial ability.
[0007] This utility model is achieved through the following technical solution: a high-strength antibacterial PBO fiber, comprising a core layer, a transition layer and an antibacterial layer sequentially coated from the inside out, wherein the core layer is PBO fiber, the transition layer and the antibacterial layer are formed by sputtering coating technology, the transition layer is a silicon oxide layer and the antibacterial layer is an antibacterial metal coating.
[0008] The thickness of the silicon oxide layer is 10–500 nm.
[0009] The antibacterial metal is selected from one of silver, copper, silver oxide, copper oxide, or zinc oxide.
[0010] The thickness of the antibacterial metal coating is ≤1000nm.
[0011] The thickness of the antibacterial metal coating is 50–1000 nm.
[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0013] (1) This utility model uses high-performance PBO fiber as the core layer, and deposits a silicon oxide transition layer and an antibacterial metal coating layer on its surface in sequence through sputtering coating technology to form a multi-layer composite structure of "PBO-silicon oxide-antibacterial metal". Through the introduction of silicon oxide transition layer, the stable combination of silver antibacterial layer and PBO fiber is realized for the first time. Without damaging the mechanical properties of PBO fiber, it gives it a stable antibacterial function, filling the technical gap in this field.
[0014] (2) In the coating process, the PBO fiber substrate is first subjected to surface modification pretreatment, and then a silicon oxide layer is coated, which improves the bonding force between the antibacterial metal coating and the fiber substrate and makes the coating less likely to peel off. The PBO fiber with silicon oxide coating has low water absorption rate. Then an antibacterial layer (such as a silver layer) is coated, which makes the antibacterial layer (such as a silver layer) on its surface well dispersed in the silicon oxide layer, the coating is uniform, and the antibacterial ability is improved.
[0015] (3) This utility model can achieve mass production using conventional sputtering coating equipment. In the pretreatment stage, surface modification is carried out using inert gas (such as Ar) plasma, without the need to introduce complex chemical reagents. In the coating stage, by adjusting parameters such as sputtering power, gas pressure, and deposition time, it can be adapted to fiber substrates of different specifications of PBO fibers. No special equipment is required throughout the process, and SiO2 / Ag target material is a commonly used industrial material, which can effectively control production costs.
[0016] (4) The antibacterial metal coating of this utility model can adopt a variety of functional antibacterial material systems, including but not limited to: single metal systems, such as silver (Ag) and copper (Cu) coatings, which achieve antibacterial (Staphylococcus aureus) through the slow release of metal ions; metal oxide systems, such as silver oxide (Ag2O), copper oxide (CuO) or zinc oxide (ZnO) composite coatings, which also have photocatalytic antibacterial properties.
[0017] (5) In this utility model, when copper components (such as Cu plating) are introduced into the antibacterial metal layer, while maintaining the antibacterial performance, the fiber surface can also be given conductive properties, which can be extended to the field of antistatic, significantly improving the application scenarios of the product. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the preparation process of this utility model.
[0020] Among them, 1—PBO fiber, 2—silicon oxide layer, and 3—antibacterial metal coating. Detailed Implementation
[0021] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.
[0022] Example 1:
[0023] This embodiment describes a high-strength antibacterial PBO fiber, the structure of which is as follows: Figure 1As shown, PBO fiber 1 is used as the core layer. Sputtering coating technology is used to deposit a silicon oxide layer 2 and a silver layer (i.e., antibacterial metal coating 3) on the surface of PBO fiber 1. The silicon oxide layer 2 serves as a transition layer, which can improve the bonding ability between the modified PBO fiber 1 and the silver layer. At the same time, it can also ensure the dispersion performance of the silver layer seed crystals, making the coating more uniform and improving the antibacterial ability of the silver layer.
[0024] In this embodiment, the PBO fiber 1 has a diameter of 12 μm. A 20 nm silicon oxide layer 2 and a 300 nm silver layer are sequentially deposited on its surface using sputtering deposition technology.
[0025] The sputtering coating technology involved in this embodiment uses conventional sputtering coating equipment to obtain PBO antibacterial fibers in the following manner (refer to...). Figure 2 (The process is as follows): Place the PBO fiber substrate on the substrate stage of the reaction chamber, evacuate the reaction chamber to a pressure no greater than 10 Pa, fill it with a modified reactive gas (such as Ar), turn on the plasma power supply for modification treatment, with a voltage of 1000-1300V, a reaction gas pressure of 10-200 Pa, and a reaction time of 3-25 s; evacuate the reaction chamber to a pressure no greater than 10E-3 Pa, fill it with a sputtering reactive gas (such as argon), use a silicon oxide alloy (e.g., silicon oxide) as the target material, turn on the plasma power supply for sputtering coating treatment, with a voltage of 1000-2500V, a sputtering reactive gas pressure no greater than 10 Pa, and control the silicon oxide coating thickness at 20 nm; evacuate the reaction chamber again to a pressure no greater than 10E-3 Pa, fill it with a sputtering reactive gas, use silver as the target material, turn on the plasma power supply for sputtering coating treatment, with a voltage of 1000-2500V, a sputtering reactive gas pressure no greater than 10 Pa, and control the coating thickness at 300 nm.
[0026] Example 2:
[0027] This embodiment uses the same sputtering coating technology as Example 1 to prepare PBO antibacterial fibers, the only difference being that the diameter of PBO fiber 1 and the thickness of silicon oxide layer 2 and silver layer are slightly different.
[0028] Specifically, in this embodiment, the PBO fiber 1 has a diameter of 12 μm, and a 20 nm silicon oxide layer 2 and a 100 nm silver layer are sequentially deposited on its surface using sputtering deposition technology.
[0029] Example 3:
[0030] This embodiment uses the same sputtering coating technology as Example 1 to prepare PBO antibacterial fibers, the only difference being that the diameter of PBO fiber 1 and the thickness of silicon oxide layer 2 and silver layer are slightly different.
[0031] Specifically, in this embodiment, the PBO fiber 1 has a diameter of 12 μm, and a 20 nm silicon oxide layer 2 and a 400 nm silver layer are sequentially deposited on its surface using sputtering deposition technology.
[0032] Comparative Example 1:
[0033] The difference between this comparative example and Example 1 is that the silicon oxide layer 2 is omitted, and the rest of the coating process is the same as that in Example 1. In the PBO antibacterial fiber prepared thereby, PBO fiber 1 is used as the core layer with a diameter of 12 μm, and the surface of PBO fiber 1 is a silver layer with a thickness of 300 nm.
[0034] Experimental Example 1:
[0035] Antibacterial tests were conducted on the PBO antibacterial fibers in Examples 1 to 3 and Comparative Example 1.
[0036] The test method followed GB / T20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Vibration method", and the inhibition rate of PBO antimicrobial fibers against Staphylococcus aureus was tested. The test results are shown in Table 1 below.
[0037] Table 1: Inhibition rate of PBO antibacterial fiber against Staphylococcus aureus
[0038]
[0039] As can be seen from Table 1 above, the PBO antibacterial fibers in Examples 1, 2, 3 and Comparative Example 1 all have antibacterial effects against Staphylococcus aureus.
[0040] Experimental Example 2;
[0041] The color fastness of the PBO antibacterial fibers in Example 1 and Comparative Example 1 was tested.
[0042] The tests included color fastness to water, color fastness to acid and alkali perspiration, color fastness to dry rubbing, and color fastness to saliva. The test methods followed GB18401-2010 "National Basic Safety Technical Specifications for Textile Products". The test results are shown in Table 2 below.
[0043] Table 2: Color fastness and durability indicators of PBO antibacterial fibers
[0044] (Note: The number of washes mentioned in the table refers to the color change level ≥ level 3 after 50 / 20 washes according to the GB18401-2010 standard test.)
[0045]
[0046] As can be seen from Table 2 above, the PBO antibacterial fiber in Example 1 has a silicon oxide transition layer, which improves the coating adhesion.
[0047] Experimental Example 3:
[0048] Mechanical properties were tested on PBO fibers, PBO antibacterial fibers in Example 1 and Comparative Example 1.
[0049] The test method was based on GB / T 19975-2005, "Test Method for Tensile Properties of High-Strength Filaments," to test the breaking strength of the fibers. The test results are shown in Table 3 below.
[0050] Table 3: Mechanical properties of PBO fibers and PBO antibacterial fibers
[0051]
[0052] As can be seen from Table 3 above, the coating process on the surface of PBO fibers (antibacterial layer or "silicon oxide + antibacterial layer") will not cause significant damage to the performance of PBO fibers.
[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A high-strength antibacterial PBO fiber, characterized in that: It includes a core layer, a transition layer and an antibacterial layer that are sequentially covered from the inside out. The core layer is PBO fiber (1), and the transition layer and antibacterial layer are formed by sputtering coating technology. The transition layer is a silicon oxide layer (2), and the antibacterial layer is an antibacterial metal coating (3).
2. The high-strength antibacterial PBO fiber according to claim 1, characterized in that: The thickness of the silicon oxide layer (2) is 10-500 nm.
3. The high-strength antibacterial PBO fiber according to claim 1, characterized in that: The antibacterial metal is selected from one of silver, copper, silver oxide, copper oxide, or zinc oxide.
4. The high-strength antibacterial PBO fiber according to any one of claims 1 to 3, characterized in that: The thickness of the antibacterial metal coating (3) is ≤1000nm.
5. The high-strength antibacterial PBO fiber according to claim 4, characterized in that: The thickness of the antibacterial metal coating (3) is 50-1000 nm.