CN116855017A - Antibacterial mildew-proof EVA composite material and preparation method thereof - Google Patents
Antibacterial mildew-proof EVA composite material and preparation method thereof Download PDFInfo
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- CN116855017A CN116855017A CN202310881553.1A CN202310881553A CN116855017A CN 116855017 A CN116855017 A CN 116855017A CN 202310881553 A CN202310881553 A CN 202310881553A CN 116855017 A CN116855017 A CN 116855017A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 46
- KSEBMYQBYZTDHS-HWKANZROSA-M (E)-Ferulic acid Natural products COC1=CC(\C=C\C([O-])=O)=CC=C1O KSEBMYQBYZTDHS-HWKANZROSA-M 0.000 claims abstract description 22
- KSEBMYQBYZTDHS-HWKANZROSA-N ferulic acid Chemical compound COC1=CC(\C=C\C(O)=O)=CC=C1O KSEBMYQBYZTDHS-HWKANZROSA-N 0.000 claims abstract description 22
- 229940114124 ferulic acid Drugs 0.000 claims abstract description 22
- KSEBMYQBYZTDHS-UHFFFAOYSA-N ferulic acid Natural products COC1=CC(C=CC(O)=O)=CC=C1O KSEBMYQBYZTDHS-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000001785 ferulic acid Nutrition 0.000 claims abstract description 22
- QURCVMIEKCOAJU-UHFFFAOYSA-N trans-isoferulic acid Natural products COC1=CC=C(C=CC(O)=O)C=C1O QURCVMIEKCOAJU-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- 239000003999 initiator Substances 0.000 claims abstract description 12
- -1 amino modified 4-propenyloxy-2-hydroxybenzophenone Chemical class 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 238000012986 modification Methods 0.000 claims abstract description 9
- 230000004048 modification Effects 0.000 claims abstract description 9
- 150000004753 Schiff bases Chemical class 0.000 claims abstract description 8
- 239000002262 Schiff base Substances 0.000 claims abstract description 5
- 239000007791 liquid phase Substances 0.000 claims abstract description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 6
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- SFWAHIDOQPMACG-UHFFFAOYSA-N (2-hydroxy-4-prop-1-enoxyphenyl)-phenylmethanone Chemical compound OC1=C(C(=O)C2=CC=CC=C2)C=CC(=C1)OC=CC SFWAHIDOQPMACG-UHFFFAOYSA-N 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000000845 anti-microbial effect Effects 0.000 claims 6
- 230000035484 reaction time Effects 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000013508 migration Methods 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 46
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 46
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000004599 antimicrobial Substances 0.000 description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229940124543 ultraviolet light absorber Drugs 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- XTVRPSBYSGATQQ-UHFFFAOYSA-N 1,2-dinitrosodioxidane Chemical compound O=NOON=O XTVRPSBYSGATQQ-UHFFFAOYSA-N 0.000 description 1
- 241000228245 Aspergillus niger Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241001515917 Chaetomium globosum Species 0.000 description 1
- 241000588923 Citrobacter Species 0.000 description 1
- 241000588914 Enterobacter Species 0.000 description 1
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 1
- 241000607760 Shigella sonnei Species 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical group [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 229940115939 shigella sonnei Drugs 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses an antibacterial mildew-proof EVA composite material and a preparation method thereof, wherein the EVA composite material is prepared from EVA resin, an antibacterial agent, an initiator, a heat stabilizer, a lubricant and a filler, wherein the antibacterial agent is prepared by firstly preparing amino modified 4-propenyloxy-2-hydroxybenzophenone by utilizing a liquid phase modification mode, and then grafting ferulic acid on the amino modified 4-propenyloxy-2-hydroxybenzophenone through Schiff base reaction. The antibacterial agent enhances the oxidation resistance of the antibacterial agent by introducing the ferulic acid, and the introduced ferulic acid and Schiff base structure has good mildew-proof and broad-spectrum antibacterial effects, and meanwhile, the antibacterial agent is embedded into the main chain of EVA in a chemical bond mode by acting with an initiator, so that the loss caused by migration, volatilization and extraction of the antibacterial agent can be prevented, and the long-acting antibacterial and mildew-proof properties of the composite material are ensured.
Description
Technical Field
The invention belongs to the field of composite materials, and particularly relates to an antibacterial and mildew-proof EVA composite material and a preparation method thereof.
Background
EVA resin, which is totally called ethylene-vinyl acetate copolymer resin, has good mechanical property, chemical stability and better biocompatibility, and has been widely applied to the fields of shoe material foaming, wires and cables, films, food medical treatment and the like. However, the surface of EVA products can grow and accumulate pathogenic microorganisms such as bacteria, mold, etc. due to long-term use, which can cause a corresponding hazard to the physical health of people to some extent. Therefore, in order to solve the problem and ensure the health and life quality of people, the EVA material needs to be subjected to antibacterial modification to prepare the EVA composite material with good antibacterial and mildew-proof effects.
The inorganic antibacterial agent which is commonly used at present is a silver ion type antibacterial agent, and the inorganic antibacterial agent is poor in compatibility with EVA, so that the prepared antibacterial EVA composite material has a certain antibacterial function, but the antibacterial agent is easy to fall off and does not have antibacterial long-acting property. Ferulic acid is a substance with good antioxidant activity, and has strong scavenging effect on hydrogen peroxide, superoxide radical, hydroxyl radical and nitroso peroxide. In addition to exhibiting strong antioxidant activity, ferulic acid has also been found to inhibit the proliferation of pathogenic bacteria such as shigella sonnei, pneumobacillus, enterobacter, escherichia coli, citrobacter, pseudomonas aeruginosa, and 11 microorganisms responsible for food spoilage.
According to the invention, the ultraviolet light absorber 4-propylene oxy-2-hydroxy benzophenone (AHB) is subjected to amino modification, and then is compounded with ferulic acid through Schiff base reaction, so that the oxidation resistance of the antibacterial agent is enhanced, the composite material is not easy to oxidize, in addition, the antibacterial agent is embedded into the main chain of EVA in a chemical bond manner, the loss caused by migration, volatilization and extraction of the antibacterial agent can be prevented, and the antibacterial and mildew-proof long-acting performance of the composite material is ensured.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an antibacterial mildew-proof EVA composite material and a preparation method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an antibacterial and mildew-proof EVA composite material is prepared from EVA resin, an antibacterial agent, an initiator, a heat stabilizer, a lubricant and a filler; wherein, based on 100 percent of the total mass of the EVA resin and the antibacterial agent, the usage amount of the initiator is 0.1 to 2 percent, the usage amount of the heat stabilizer is 0.5 percent, the usage amount of the lubricant is 1.5 percent, and the usage amount of the filler is 0.2 percent; the mass percentage ratio of the EVA resin to the antibacterial agent is (98-99.9) to (0.1-2).
Further, the EVA resin has a VA content of 6% and a melt index of 28g/10min.
Further, the initiator is dicumyl peroxide (DCP).
Further, the heat stabilizer is calcium stearate.
Further, the lubricant is polyethylene wax.
Further, the filler is talc.
Further, the antibacterial agent is prepared by carrying out surface modification on 4-propenoxy-2-hydroxybenzophenone (AHB) by 3-aminopropyl trimethoxy silane in a liquid phase modification mode to prepare amino modified 4-propenoxy-2-hydroxybenzophenone (AHB-NH) 2 ) Then grafting ferulic acid on the polymer through Schiff base reaction; the method comprises the following specific steps:
a) Dispersing 4-propenoxy-2-hydroxy diphenyl ketone (AHB) in toluene, adding 3-aminopropyl trimethoxy silane, stirring at 50 ℃ for reaction for 3 hours, washing with toluene for multiple times, and drying to obtain amino modified 4-propenoxy-2-hydroxy diphenyl ketone (AHB-NH) 2 ）；
b) The AHB-NH obtained 2 Dissolving with N, N-Dimethylformamide (DMF), adding ferulic acid, reflux-reacting at 60deg.C for 2 hr, reflux-washing with ethanol to remove unreacted ferulic acid, and obtaining the antibacterial agent AHB-NH 2 -FA。
Wherein, the molar ratio of the 3-aminopropyl trimethoxy silane, the 4-propylene oxy-2-hydroxy diphenyl ketone and the ferulic acid is 3:1:1.
The preparation method of the antibacterial mildew-proof EVA composite material comprises the following steps:
1) Weighing EVA resin, an antibacterial agent, an initiator, a heat stabilizer, a lubricant and a filler according to a proportion, and stirring at a high speed to uniformly mix the materials to obtain a mixture;
2) And pouring the obtained mixture into a double-screw extruder for extrusion granulation, and drying to obtain the antibacterial and mildew-proof EVA composite material.
Further, the rotation speed of the high-speed stirring in the step 1) is 230 rpm, and the time is 30 min.
Further, the twin-screw extruder used in step 2) was operated at a speed of 200-300 rpm and the barrel temperature was 120-150 ℃.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the oxidation resistance of the antibacterial agent is enhanced by introducing the ferulic acid, the introduced ferulic acid and Schiff base structure has good mildew-proof and broad-spectrum antibacterial effects, and meanwhile, the antibacterial agent is embedded into the main chain of EVA in a chemical bond mode by acting with an initiator, so that the loss caused by migration, volatilization and extraction of the antibacterial agent can be prevented, and the obtained EVA composite material has the original ultraviolet-proof performance and long-acting antibacterial and mildew-proof properties.
Drawings
FIG. 1 is a schematic diagram of the reaction scheme for preparing an antimicrobial agent according to the present invention.
FIG. 2 is a schematic representation of the reaction of the antimicrobial agent of the present invention embedded in the EVA backbone.
FIG. 3 shows AHB-NH prepared in the examples 2 、AHB-NH 2 -infrared spectrum contrast plot of FA versus AHB.
Detailed Description
An antibacterial and mildew-proof EVA composite material is prepared by the following steps:
1) The EVA resin and the antibacterial agent are respectively weighed according to the mass percentage ratio of (98-99.9) (0.1-2), then the initiator dicumyl peroxide (DCP) accounting for 0.1% -2% of the total mass of the EVA resin and the antibacterial agent, the heat stabilizer calcium stearate accounting for 0.5%, the lubricant polyethylene wax accounting for 1.5% and the filler talcum powder accounting for 0.2% are added into a high-speed stirrer, and stirred at 230 rpm for 30 min to be uniformly mixed, so as to obtain a mixture;
2) And pouring the obtained mixture into a double-screw extruder, extruding and granulating at a rotating speed of 200-300 rpm, wherein the temperature of an extruding cylinder is 120-150 ℃, and drying to obtain the antibacterial and mildew-proof EVA composite material.
Wherein the EVA resin has a VA content of 6% and a melt index of 28g/10min.
The preparation of the antibacterial agent comprises the following steps:
1) Dispersing 4-propylene oxy-2-hydroxy diphenyl ketone in toluene, adding a certain amount of 3-aminopropyl trimethoxy silane, stirring at 50 ℃ for reaction for 3 hours, washing with toluene for multiple times, and drying to obtain AHB-NH 2 ；
2) AHB-NH was prepared with the appropriate amount of N, N-Dimethylformamide (DMF) 2 Dissolving, adding a certain amount of ferulic acid, heating and refluxing at 60deg.C for 2 hr, and refluxing with ethanol to remove unreacted ferulic acid to obtain antibacterial agent AHB-NH 2 -FA。
FIG. 3 shows the prepared AHB-NH 2 、AHB-NH 2 -infrared spectrum contrast plot of FA versus AHB. As can be seen from FIG. 3, AHB-NH is compared to AHB 2 At 1480 and 1480 cm −1 2930 and 2930 cm −1 There is a new absorption peak, 1480 and 1480 cm −1 is-NH 2 Is a deformation vibration peak of (2); 2930 cm −1 Is methylene-CH 2 Is a stretching vibration peak of (2). This result indicates successful amino incorporation into AHB. Compared with AHB-NH 2 ，AHB-NH 2 FA at 3420 and 3420 cm −1 The stretching vibration peak of-OH appears, which indicates that ferulic acid and AHB-NH 2 Successfully reacts to prepare AHB-NH 2 -FA。
In order to make the contents of the present invention more easily understood, the technical scheme of the present invention will be further described with reference to the specific embodiments, but the present invention is not limited thereto.
Example 1:
the embodiment provides an antibacterial mildew-proof EVA composite material, which is prepared by the following steps:
1) The EVA resin and the antibacterial agent are respectively weighed according to the mass percentage ratio of 99.9:0.1, and then DCP accounting for 0.3 percent of the total mass of the EVA resin and the antibacterial agent, calcium stearate accounting for 0.5 percent, polyethylene wax accounting for 1.5 percent and talcum powder accounting for 0.2 percent are weighed, and the raw materials are added into a high-speed stirrer and stirred at 230 rpm for 30 minutes to be uniformly mixed to obtain a mixture;
2) And pouring the obtained mixture into a double-screw extruder, carrying out thermomechanical mixing, reaction, extrusion (the temperature of an extruding cylinder is 120 ℃), cooling and granulating, and drying to obtain the antibacterial and mildew-proof EVA composite material.
Example 2:
the embodiment provides an antibacterial mildew-proof EVA composite material, the EVA resin consumption is 99.5%, and the antibacterial agent AHB-NH 2 The FA was used in an amount of 0.5% and the other contents were the same as in example 1.
Example 3:
the embodiment provides an antibacterial and mildew-proof EVA composite material, the EVA resin dosage is 99%, and the antibacterial agent AHB-NH 2 The FA was used in an amount of 1.0% and the other contents were as in example 1.
Example 4:
the embodiment provides an antibacterial and mildew-proof EVA composite material, the EVA resin consumption is 98%, and the antibacterial agent AHB-NH 2 The FA was used in an amount of 2.0% and the other contents were as in example 1.
Comparative example 1:
this comparative example provides an antibacterial and mildew-resistant EVA material using common inorganic silver ions (langyi B130) as an antibacterial agent, otherwise as in example 4.
Comparative example 2:
this comparative example provides an antibacterial and mildew-resistant EVA composite using 4-propenoxy-2-hydroxybenzophenone (AHB) as the antibacterial agent, otherwise as in example 4.
Comparative example 3:
the comparative example provides an antibacterial and mildew-proof EVA composite material which adopts ferulic acid as an antibacterial agent, and the other contents are the same as those in the example 4.
Comparative example 4:
the comparative example provides an antibacterial and mildew-proof EVA composite material, which adopts 4-propylene oxy-2-hydroxybenzophenone (AHB) and ferulic acid to be mixed according to a molar ratio of 1:1 as an antibacterial agent, and the other contents are the same as those of the example 4.
The EVA materials obtained in examples and comparative examples were tested for antibacterial properties (using E.coli as a test strain) and mildew-proof grades (using Aspergillus niger ATCC 6275, chaetomium globosum ATCC 6205, etc. as test strains to construct a mildew environment), and the results are shown in Table 1.
TABLE 1 antibacterial and mildew-proof grades of different EVA materials
As can be seen from a comparison of the examples in Table 1 with comparative example 1, the antimicrobial agent AHB-NH of the present invention 2 The FA can enhance the antibacterial property of the antibacterial agent by introducing ferulic acid and Schiff base structures, so that the better antibacterial property can be maintained by using a smaller amount of the antibacterial agent.
As is clear from a comparison between example 4 and comparative example 2, since AHB is only an ultraviolet light absorber, the composite material obtained by adding only AHB does not have antibacterial and antifungal properties.
As can be seen from a comparison of example 4 with comparative examples 3, 4, with single ferulic acid and blends of AHB and ferulic acid with EVA simple physical blendingCompared with the mixed solution, the invention prepares the antibacterial agent AHB-NH 2 FA is embedded in the main chain of EVA in a chemical bond manner, which solves the problem of compatibility between the antibacterial agent and EVA, and ensures that the antibacterial agent does not migrate, volatilize and withdraw, thereby realizing better and longer-acting antibacterial and mildew-proof effects with less antibacterial agent.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. An antibacterial and mildew-proof EVA composite material is characterized in that: the composite material is prepared from EVA resin, an antibacterial agent, an initiator, a heat stabilizer, a lubricant and a filler serving as raw materials;
wherein, based on 100 percent of the total mass of the EVA resin and the antibacterial agent, the usage amount of the initiator is 0.1 to 2 percent, the usage amount of the heat stabilizer is 0.5 percent, the usage amount of the lubricant is 1.5 percent, and the usage amount of the filler is 0.2 percent; the mass percentage ratio of the EVA resin to the antibacterial agent is (98-99.9) to (0.1-2).
2. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the EVA resin has a VA content of 6% and a melt index of 28g/10min.
3. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the antibacterial agent is prepared by firstly carrying out surface modification on 4-propenoxy-2-hydroxybenzophenone by 3-aminopropyl trimethoxy silane in a liquid phase modification mode to prepare amino modified 4-propenoxy-2-hydroxybenzophenone, and then grafting ferulic acid on the amino modified 4-propenoxy-2-hydroxybenzophenone by Schiff base reaction.
4. The antibacterial and mildew-resistant EVA composite according to claim 3, wherein: the molar ratio of the 3-aminopropyl trimethoxysilane, the 4-propyleneoxy-2-hydroxybenzophenone and the ferulic acid is 3:1:1;
the temperature of the liquid phase modification is 50 ℃, and the reaction time is 3 hours;
the Schiff base reaction is carried out under the condition of taking N, N-dimethylformamide as a solvent, and heating and refluxing are carried out for 2 hours at 60 ℃.
5. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the initiator is dicumyl peroxide.
6. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the heat stabilizer is calcium stearate.
7. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the lubricant is polyethylene wax.
8. The antimicrobial and mildew-resistant EVA composite according to claim 1, characterized in that: the filler is talcum powder.
9. A method for preparing the antibacterial and mildew-proof EVA composite according to claim 1, characterized in that: the method comprises the following steps:
1) Weighing EVA resin, an antibacterial agent, an initiator, a heat stabilizer, a lubricant and a filler according to a proportion, and stirring at a high speed to uniformly mix the materials to obtain a mixture;
2) And pouring the obtained mixture into a double-screw extruder for extrusion granulation, and drying to obtain the antibacterial and mildew-proof EVA composite material.
10. The method for preparing the antibacterial and mildew-proof EVA composite material according to claim 9, wherein the method comprises the following steps: the rotating speed of the high-speed stirring is 230 rpm, and the time is 30 min; the rotation speed of the twin-screw extruder is 200-300 rpm, and the temperature of the extruding cylinder is 120-150 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117888227A (en) * | 2024-01-31 | 2024-04-16 | 东莞市杰瑟普化妆用具有限公司 | Preparation method of collagen-containing antibacterial fiber applied to cosmetic brush hair |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117888227A (en) * | 2024-01-31 | 2024-04-16 | 东莞市杰瑟普化妆用具有限公司 | Preparation method of collagen-containing antibacterial fiber applied to cosmetic brush hair |
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