Antibacterial and insecticidal microcapsule fabric

Abstract

The utility model relates to the technical field of antibacterial fabrics, and provides an antibacterial and insecticidal microcapsule fabric which comprises a fabric base layer, antibacterial and insecticidal microcapsules are filled in the fabric base layer, two sides of the fabric base layer are respectively provided with a porous network hydrogel layer, and the outer side of each porous network hydrogel layer is coated with a waterproof surface layer. The antibacterial and insecticidal microcapsule is composed of a slow-release shell and an antibacterial and insecticidal core material wrapped in the slow-release shell. The antibacterial and insecticidal microcapsule fabric with the hydrophobic surface layer and the hydrophilic inner layer is obtained, the antibacterial effect is remarkable, the biocompatibility is good, and application and development in the dressing field are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of antibacterial fabrics, in particular to an antibacterial and insecticidal microcapsule fabric. Background Art

[0002] Cotton fabrics are comfortable, soft, breathable, easy to absorb moisture and inexpensive, making them widely used in the field of wound dressings. However, the surface of traditional cotton fabrics is prone to the reproduction of a large number of bacteria, and traditional cotton fabric wound dressings are prone to adhesion to the wound, which will cause the wound to be injured again when the dressing is removed. This has limited the development of traditional cotton fabrics in the field of wound dressings to a certain extent. Therefore, it is necessary to improve traditional cotton fabrics, especially the improvement of antibacterial, insecticidal and waterproof properties is particularly critical.

[0003] In the prior art, the fibers of the fabric base are treated with antibacterial and waterproof treatment to achieve the sterilization and waterproof functions of the dressing. For example, the patent CN108498842B "A medical dressing for in vitro wound care" discloses that the medical dressing is composed of two layers of fabrics, the outer layer of which is polyester fabric, and the inner layer of which is woven from fibers with a core-shell structure. The fibers of the core-shell structure are based on sodium alginate fibers and coated with polyacrylate on the outside, achieving good surface hydrophobic and inner hydrophilic effects, and having certain flexibility and strength. However, it can be seen that the patent requires the use of a large amount of modified fibers (i.e., core-shell fibers with sodium alginate fibers as the core and coated with polyacrylate on the outside), the acquisition method is complex, and the pre-treatment steps are cumbersome. Specifically, the alginate fiber is plasma activated by using polyacrylate emulsion, so that the alginate fiber surface has a crosslinkable group, and the alginate fiber is crosslinked and coated with polyacrylate under the action of a silane coupling agent, which increases resource consumption and prolongs the production process, thereby increasing the preparation cost. Secondly, the antibacterial performance of the dressing in the patent needs to be further enhanced. In the prior art, metal ions are generally used for antibacterial dressings, such as the patent CN109532142A "A long-lasting antibacterial fabric containing copper ion fibers", the patent CN104228174A "Antibacterial fabric", and the patent CN108621481A "Antibacterial fabric and antibacterial textile containing silver ions". However, if the amount of metal ions added to the dressing is small, the functionality cannot be guaranteed; if the amount of metal ions added is increased, the air permeability of the dressing will often deteriorate and the hand feel will be poor. It can be seen that it is difficult to achieve the unification of many properties such as antibacterial fabric, waterproof outer layer, and hydrophilic inner layer in the prior art, resulting in less than ideal functions of the dressing.

[0004] To this end, based on the existing technology, the utility model creatively designs a porous network hydrogel layer and a fabric base layer arranged between the porous network hydrogel layers, and fills antibacterial and insecticidal microcapsules in the fabric base layer, and coats a waterproof surface layer on the outside of the porous network hydrogel layer, providing an antibacterial and insecticidal microcapsule fabric with a hydrophobic surface layer and a hydrophilic inner layer, aiming to simplify the structure of the fabric and enhance its waterproofness, breathability and antibacterial properties. Utility Model Content

[0005] The utility model aims to provide an antibacterial and insecticidal microcapsule fabric with a simple structure, good antibacterial performance, hydrophobic surface and hydrophilic inner layer, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An antibacterial and insecticidal microcapsule fabric comprises a fabric base, the fabric base is filled with antibacterial and insecticidal microcapsules, two sides of the fabric base are respectively provided with porous network hydrogel layers, and the outer sides of the porous network hydrogel layers are coated with a waterproof surface layer; the antibacterial and insecticidal microcapsules are composed of a sustained-release shell and an antibacterial and insecticidal core material wrapped in the sustained-release shell.

[0008] Preferably, the fabric base layer is an anion modified pure cotton fabric layer.

[0009] Preferably, the fabric base layer is woven from pure cotton warp yarns and pure cotton weft yarns, and the gaps between the pure cotton warp yarns and the pure cotton weft yarns form receiving holes for filling antibacterial and insecticidal microcapsules.

[0010] Preferably, the average particle size of the antibacterial and insecticidal microcapsules is 0.3-0.8 μm.

[0011] Preferably, metal oxide particles are adsorbed in the porous network hydrogel layer to improve biocompatibility and antibacterial rate.

[0012] Preferably, the metal oxide particles are spherical, and the average particle size of the metal oxide particles is 45-55 nm.

[0013] Preferably, the thickness of the fabric base layer is 1.2-2.4 mm.

[0014] Preferably, the thickness of the porous network hydrogel layer is 1.2-1.5 times the thickness of the fabric base layer.

[0015] Preferably, the thickness of the waterproof surface layer is 0.8-1.5 mm.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model creatively designs a porous network hydrogel layer and a fabric base layer arranged between the porous network hydrogel layers, and fills antibacterial and insecticidal microcapsules in the fabric base layer, and coats a waterproof surface layer on the outside of the porous network hydrogel layer, fully utilizing the strong moisturizing property of the porous network hydrogel layer, and having good softness, adhesion and antibacterial properties, it can absorb wound bed exudate in a timely manner while effectively avoiding external liquid contamination and adhesion to the wound, accelerating wound healing, and overcoming the disadvantage that traditional cotton fabric wound dressings are prone to adhesion to the wound; the antibacterial and insecticidal microcapsules have a sustained-release effect, can exert long-lasting antibacterial and insecticidal effects, extend the service life of the dressing, and avoid the problem that the dressing needs to be replaced after a period of use, and the location of the antibacterial and insecticidal microcapsules does not affect the overall softness, strength and air permeability of the fabric, so that the overall performance of the fabric is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an antibacterial and insecticidal microcapsule fabric of the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the antibacterial and insecticidal microcapsules in the utility model;

[0020] Figure 3 It is a diagram showing the antibacterial effects of the modified fabric, hydrogel, and hydrogel-based cotton fabric in the utility model;

[0021] Figure 4 This is an image of cells after being cultured with the extract in the utility model;

[0022] In the figure, 1-fabric base layer, 101-pure cotton warp yarn, 102-pure cotton weft yarn, 103-receiving hole, 2-porous network hydrogel layer, 3-waterproof surface layer, 4-antibacterial and insecticidal microcapsule, 401-slow-release shell, 402-antibacterial and insecticidal core material, 5-metal oxide particles. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 4 , the utility model provides: Specific embodiment 1

[0026] An antibacterial and insecticidal microcapsule fabric comprises a fabric base layer 1 with a thickness of 1.2 mm, the fabric base layer 1 is an anion-modified pure cotton fabric layer (1,2,3,4-butanetetracarboxylic acid and sodium hypophosphite are used to anion-modify the cotton fabric), woven from pure cotton warp yarns 101 and pure cotton weft yarns 102, and the gaps between the pure cotton warp yarns 101 and the pure cotton weft yarns 102 form accommodating holes 103 for filling antibacterial and insecticidal microcapsules 4, the antibacterial and insecticidal microcapsules 4 are spherical, with an average particle size of 0.3 μm, and are composed of a sustained-release shell 401 (polyurethane shell) and an antibacterial and insecticidal core material 402 (a solid core material adsorbed with an antibacterial and insecticide, and the antibacterial and insecticide is a mixture of nano zinc oxide, sodium dodecylbenzene sulfonate and chitosan quaternary ammonium salt) wrapped in the sustained-release shell 401.

[0027] In this embodiment 1, a porous network hydrogel layer 2 (polyvinyl alcohol / polyacrylamide double network antibacterial hydrogel) with a thickness of 1.4 mm (1.2 times the thickness of the fabric base layer) is bonded to both sides of the fabric base layer 1 to form a "sandwich structure". The porosity of the porous network hydrogel layer 2 is 92%, and metal oxide particles 5 (nano iron oxide) are adsorbed in the porous network hydrogel layer 2 with an adsorption rate of 0.2%. The metal oxide particles 5 are spherical and have an average particle size of 45 nm.

[0028] In this embodiment 1, a waterproof surface layer 3 (paraffin layer) with a thickness of 0.8 mm is coated on the outside of the porous network hydrogel layer 2 . Specific embodiment 2

[0030] The antibacterial and insecticidal microcapsule fabric of this embodiment 2 has the same structure as that of embodiment 1, except that: the thickness of the fabric base layer 1 is 2.4 mm, the thickness of the porous network hydrogel layer 2 is 3.6 mm (1.5 times the thickness of the fabric base layer), and the thickness of the waterproof surface layer 3 is 1.5 mm; the average particle size of the antibacterial and insecticidal microcapsules 4 is 0.8 μm; the adsorption rate of the metal oxide particles 5 (nano copper oxide) is 0.3%, and the average particle size of the metal oxide particles 5 is 55 nm. Specific embodiment 3

[0032] The antibacterial and insecticidal microcapsule fabric of this embodiment 3 has the same structure as that of embodiment 1, except that: the thickness of the fabric base layer 1 is 1.6 mm, the thickness of the porous network hydrogel layer 2 is 2.2 mm (1.4 times the thickness of the fabric base layer), and the thickness of the waterproof surface layer 3 is 1.2 mm; the average particle size of the antibacterial and insecticidal microcapsules 4 is 0.5 μm; the adsorption rate of the metal oxide particles 5 (nano zinc oxide) is 0.2%, and the average particle size of the metal oxide particles 5 is 52 nm.

[0033] The antibacterial and insecticidal microcapsule fabrics obtained in specific examples 1 to 3 were tested for relevant properties, and the results were as follows (including the control group: modified fabric, single hydrogel):

[0034] Table 1 Performance test data of antibacterial and insecticidal microcapsule fabrics obtained in specific examples 1 to 3

[0035]

[0036] As can be seen from Table 1, the breaking stress of the antibacterial and insecticidal microcapsule fabric (PHPC) designed by the utility model can reach more than 7.9 MPa, and the mechanical properties are significantly improved compared with those of a single hydrogel, which is beneficial to its application in the fields of biomedicine and the like; the swelling rates of the antibacterial and insecticidal microcapsule fabric designed by the utility model in deionized water and PBS (phosphate buffer solution) are about 480% and 410%, respectively, which meet the requirements of an ideal wound dressing, and the good swelling rate enables the antibacterial and insecticidal microcapsule fabric to absorb the wound in time. Tissue exudate, thereby accelerating wound healing; hydrogel is a hydrophilic material, the contact angle of a single hydrogel is about 49.47°, and the contact angle of the antibacterial and insecticidal microcapsule fabric formed by it is about 119°, indicating that the surface layer of the fabric obtained by the utility model is hydrophobic, that is, the antibacterial and insecticidal microcapsule fabric is designed with a hydrophobic surface layer and a hydrophilic inner layer. When used, the fabric can not only absorb wound bed exudate in time, but also effectively avoid external liquid contamination and adhesion, further enhancing the huge potential of the fabric in the field of wound dressings. In addition, the antibacterial effects of modified fabrics, single hydrogels, and antibacterial and insecticidal microcapsule fabrics (hydrogel-based cotton fabrics) on E. coli and S. aureus were also tested (such as Figure 3 ), the antibacterial rate of a single hydrogel was 53.87%, and the antibacterial rate of the antibacterial and insecticidal microcapsule fabric was above 99.77%, which was much higher than the basic requirement of 70% antibacterial rate for antibacterial materials, and the antibacterial effect was significant.

[0037] In addition, the cell viability in each embodiment was measured to be above 92% (the morphology and distribution of L929 fibroblasts under an optical microscope after co-culture with the sample extract for 24 hours, as shown in FIG. Figure 4 ), indicating that the antibacterial and insecticidal microcapsule fabric designed by the utility model has no obvious toxicity to mammalian cells and has good biocompatibility. This is also because the metal oxide particles are adsorbed in the porous network hydrogel layer, which further lays a foundation for its application in the field of dressings.

[0038] It can be seen from the above embodiments of the utility model that the utility model designs a porous network hydrogel layer and a fabric base layer arranged between the porous network hydrogel layers, and fills antibacterial and insecticidal microcapsules in the fabric base layer, and coats a waterproof surface layer on the outside of the porous network hydrogel layer, which fully utilizes the strong moisturizing properties of the porous network hydrogel layer to maintain a moist healing environment suitable for wound healing, and has good softness, adhesion, and antibacterial properties. It also has the characteristics of high swelling rate, soft and elastic structure, and good biocompatibility. It can effectively avoid external liquid contamination and adhesion to the wound while absorbing the exudate of the wound bed in time, accelerate wound healing, and overcome the disadvantage that traditional cotton fabric wound dressings are prone to adhesion to the wound.

[0039] The antibacterial and insecticidal microcapsules in the utility model have a sustained release effect, can exert long-lasting antibacterial and insecticidal effects, extend the service life of the dressing, and avoid the problem of the dressing needing to be replaced after a period of use. The location of the antibacterial and insecticidal microcapsules does not affect the overall softness, strength and air permeability of the fabric, so that the overall performance of the fabric is further improved.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An antibacterial and insecticidal microcapsule fabric, characterized in that: It comprises a fabric base layer, which is filled with antibacterial and insecticidal microcapsules, and porous network hydrogel layers are respectively provided on both sides of the fabric base layer, and the outer sides of the porous network hydrogel layers are coated with a waterproof surface layer; the antibacterial and insecticidal microcapsules are composed of a sustained-release shell and an antibacterial and insecticidal core material wrapped in the sustained-release shell.

2. The antibacterial and insecticidal microcapsule fabric according to claim 1, characterized in that: The fabric base layer is an anion modified pure cotton fabric layer.

3. The antibacterial and insecticidal microcapsule fabric according to claim 1, characterized in that: The fabric base layer is woven from pure cotton warp yarns and pure cotton weft yarns, and the gaps between the pure cotton warp yarns and the pure cotton weft yarns form receiving holes for filling antibacterial and insecticidal microcapsules.

4. The antibacterial and insecticidal microcapsule fabric according to claim 1 or 3, characterized in that: The average particle size of the antibacterial and insecticidal microcapsules is 0.3-0.8 μm.

5. The antibacterial and insecticidal microcapsule fabric according to claim 1, characterized in that: The porous network hydrogel layer is filled with metal oxide particles.

6. The antibacterial and insecticidal microcapsule fabric according to claim 5, characterized in that: The metal oxide particles are spherical, and the average particle size of the metal oxide particles is 45-55 nm.

7. The antibacterial and insecticidal microcapsule fabric according to claim 1, characterized in that: The thickness of the fabric base layer is 1.2-2.4 mm.

8. The antibacterial and insecticidal microcapsule fabric according to claim 7, characterized in that: The thickness of the porous network hydrogel layer is 1.2-1.5 times the thickness of the fabric base layer.

9. The antibacterial and insecticidal microcapsule fabric according to claim 7 or 8, characterized in that: The thickness of the waterproof surface layer is 0.8-1.5 mm.

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