CN116334781A - Wear-resistant artificial grass silk fiber and preparation method thereof - Google Patents
Wear-resistant artificial grass silk fiber and preparation method thereof Download PDFInfo
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- CN116334781A CN116334781A CN202211723288.6A CN202211723288A CN116334781A CN 116334781 A CN116334781 A CN 116334781A CN 202211723288 A CN202211723288 A CN 202211723288A CN 116334781 A CN116334781 A CN 116334781A
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- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 37
- 239000000835 fiber Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 150000002500 ions Chemical class 0.000 claims abstract description 64
- 239000000843 powder Substances 0.000 claims abstract description 59
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 44
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 44
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000004005 microsphere Substances 0.000 claims abstract description 32
- 229960003638 dopamine Drugs 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 19
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 15
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 15
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 15
- 150000001450 anions Chemical class 0.000 claims abstract description 14
- 239000004814 polyurethane Substances 0.000 claims abstract description 13
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 9
- 238000005299 abrasion Methods 0.000 claims abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 9
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 9
- 239000003999 initiator Substances 0.000 claims abstract description 9
- 229920002635 polyurethane Polymers 0.000 claims abstract description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 9
- 239000004595 color masterbatch Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- -1 dopamine modified kaolin Chemical class 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005119 centrifugation Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 5
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000379 polymerizing effect Effects 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 229920003023 plastic Polymers 0.000 abstract description 10
- 239000004033 plastic Substances 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000036541 health Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920001690 polydopamine Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses an abrasion-resistant artificial grass silk fiber and a preparation method thereof, wherein the abrasion-resistant artificial grass silk fiber comprises the following materials in parts by weight: low density polyethylene: 75-85 parts; dopamine: 0.3-0.5 part; kaolin: 3-5 parts; negative ion microsphere: 16-20 parts; processing aid: 0.7-0.8 part; color master batch: 3-4 parts; wherein the density of the low density polyethylene is 0.920g/cm 3 ‑0.925g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The anion microsphere comprises the following components in parts by weight: modified powder: 55-60 parts; 15% polyvinyl alcohol: 35-40 parts; 2, 2-dioxyacetophenone initiator: 0.5 to 1.5 parts; polyurethane PU:1 to 3.5 parts; the modified powder comprises the following components in parts by mass: negative ion powder: 25-40 parts; methyl methacrylate monomer: 60-75 parts; silane coupling agent: 1.5-2 parts; the mesh number of the negative ion powder is 3000 meshes; the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.4-0.7 parts; an antioxidant: 0.05-0.2 parts; the scheme can obviously improve the plasticThe material has mechanical property, wear resistance and the like, and the negative ion plastic with good performance and environmental protection is prepared.
Description
Technical Field
The invention relates to the technical field of artificial lawns, in particular to an abrasion-resistant artificial grass silk fiber and a preparation method thereof.
Background
The artificial grass is a plastic artificial grass, has extremely high similarity with natural grass in appearance, recoverability, ventilation, water permeability, sound absorption and noise reduction, and has remarkable advantages compared with the artificial grass prepared by modern plastic chemical fiber or other materials. However, the defects of the traditional artificial lawn are also obvious, such as poor environmental protection performance of a grass yarn layer prepared from chemical fiber materials, no air purification function of the natural lawn, and the artificial lawn is easy to cause irreversible damage to the physical health of athletes and forms a potential risk to the natural environment when used for a long time; especially for sports lawns, people frequently move on the sports lawns and rub the artificial grass filaments, and the artificial grass filaments can be split, fuzzed and the like.
The artificial grass yarn fiber is a main component part of the artificial lawn, the quality of the artificial lawn is mainly derived from the quality of the artificial grass yarn, and the plastic polymer of the artificial grass yarn raw material is mainly polyethylene, so that the artificial grass yarn fiber has poor performance and is easy to cause irreversible damage to the physical health of athletes after long-term use; on the basis, negative ion powder is added into the grass yarn layer, so that negative ions released to the outside can purify the air, and the grass yarn is beneficial to human health; the negative ion powder radiates far infrared rays, generates negative oxygen ions, adsorbs and the like according to the characteristics of the negative ion powder, but the dispersibility and the stability of the negative ion powder in a high polymer matrix can not meet the requirements of practical application at present, the surface energy of the negative ion powder is large, the surface activity is very high, single particles can not exist stably, the single particles are often agglomerated through mutual attraction, and the powder performance is degraded after the agglomeration, so that the performance of the negative ion powder is not easy to embody. In addition, because the raw materials of the artificial grass filaments are mainly polyethylene, the friction performance is poor, the phenomenon of breaking and damaging the grass filaments easily occurs in the using process, the wear resistance of the grass filaments is improved, and the service life of the artificial lawn is prolonged.
Disclosure of Invention
The invention aims to solve the problems of poor environmental protection and wear resistance of artificial lawns in the prior art, and provides a wear-resistant artificial grass silk fiber and a preparation method thereof, wherein kaolin is used as a filler to be added into a polymer, so that the mechanical property, wear resistance and the like of plastics can be remarkably improved; because the kaolin is poor in compatibility between inorganic matters and organic matters, the dopamine is used for modifying the kaolin and then is added into the polymer, so that the dispersion stability of the kaolin in the polymer can be obviously improved, the dosage of the kaolin can be reduced, and the polymer shows good wear resistance; secondly, because of the miniaturization of the negative ion powder particles and the strong polarity of the surface, the uniform dispersion of the negative ion powder in the polymer material is difficult, and the interface wettability with the polymer material is poor, the invention prepares the negative ion microsphere after the stabilization treatment of the fine negative ion powder, and fuses the negative ion microsphere and the polymer, thereby preparing the negative ion plastic with good performance and environmental protection.
The technical scheme of the invention is as follows:
the wear-resistant artificial grass silk fiber comprises the following materials in parts by weight:
low density polyethylene: 75-85 parts;
dopamine: 0.3-0.5 part;
kaolin: 3-5 parts;
negative ion microsphere: 16-20 parts;
processing aid: 0.7-0.8 part;
color master batch: 3-4 parts;
wherein the density of the low density polyethylene is 0.920g/cm 3 -0.925g/cm 3 ；
The negative ion microsphere comprises the following components in parts by mass: modified powder: 55-60 parts; 15% polyvinyl alcohol: 35-40 parts; 2, 2-dioxyacetophenone initiator: 0.5 to 1.5 parts; polyurethane PU:1 to 3.5 parts;
the modified powder comprises the following components in parts by weight: negative ion powder: 25-40 parts; methyl methacrylate monomer: 60-75 parts; silane coupling agent: 1.5-2 parts; the mesh number of the negative ion powder is 3000 meshes;
the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.4-0.7 parts; an antioxidant: 0.05 to 0.2 parts.
Preferably, the wear-resistant artificial grass silk fiber comprises the following materials in parts by mass:
low density polyethylene: 80 parts;
dopamine: 0.5 parts;
kaolin: 4 parts;
negative ion microsphere: 18 parts;
processing aid: 0.7 parts;
color master batch: 3 parts;
wherein, the anion microsphere comprises the following components in parts by mass: modified powder: 58 parts; 15% polyvinyl alcohol: 35 parts; 2, 2-dioxyacetophenone initiator: 1 part; polyurethane: 2 parts;
the modified powder comprises the following components in parts by weight: negative ion powder: 35 parts; silane coupling agent: 2 parts; methyl methacrylate monomer: 65 parts;
the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.6 parts; an antioxidant: 0.2 parts.
Preferably, the compatilizer is YP510 of Huizhou Yupu chemical Co Ltd, and the antioxidant is antioxidant 1010 of Nanjing Lipai chemical Co Ltd.
The invention provides a preparation method of wear-resistant artificial grass silk fiber, which comprises the following steps:
s1, preparing kaolin suspension:
adding kaolin into a beaker containing deionized water while stirring, pouring triaminomethane into the beaker after stirring is completed, adjusting the pH of the mixed solution to 8, then adding dopamine, stirring for two hours by a magnetic stirrer at room temperature, and uniformly mixing to obtain a kaolin suspension;
s2, preparing dopamine modified kaolin:
putting the kaolin suspension prepared in the step S1 into a centrifugal machine with the rotating speed of 11000rpm/min for centrifugation for 20 minutes, washing the centrifuged kaolin after centrifugation, and drying the washed kaolin to constant weight at the temperature of 80 ℃ to prepare the dopamine modified kaolin;
s3, preparing modified powder:
placing the negative ion powder and the silane coupling agent into a three-neck flask, and adding ethanol which is 2.5 times of the total mass of the negative ion powder and the silane coupling agent into the three-neck flask to serve as a solvent; mixing and stirring anion powder, a silane coupling agent and an ethanol solution for 30min at room temperature, then introducing nitrogen into the mixed solution, heating and refluxing for two hours, then taking out the mixed solution, filtering, drying, grinding and refining to obtain modified powder with stable surface;
s4, preparing negative ion microspheres:
adding the modified powder prepared in the step S3 into a reaction bottle, adding deionized water and polyvinyl alcohol into the reaction bottle, heating and dissolving the mixed material in the reaction bottle, adding methyl methacrylate monomer, stirring again for dispersing for 1 hour, raising the temperature to 70 ℃, and polymerizing for 4 hours; then heating to 80 ℃, preserving heat for 2 hours, closing nitrogen gas inlet after heat preservation, cooling to 50 ℃, and finally carrying out suction filtration, washing and drying on the mixed material to obtain the anion microsphere;
s5, preparing grass silk fibers:
adding the dopamine modified kaolin prepared in the step S2 and the anion microsphere prepared in the step S4, low-density polyethylene, a processing aid, masterbatch, polyurethane and a 2, 2-dioxyacetophenone initiator into a high-speed mixer in proportion, mixing, adding the materials into an extruder for extrusion wire drawing after uniform mixing, and then rolling after passing through a hot stretching box and a heat treatment box.
Preferably, the temperatures of all sections of the extruder from the feeding end to the discharging end are as follows: temperature of the machine head: 120-140 ℃; a region: 170-190 ℃; two areas: 175-195 deg.c; three regions: 175-195 deg.c; four regions: 175-195 deg.c.
Preferably, the temperature in the hot stretching box is 135 ℃, the stretching ratio of the hot stretching box is 1:3, and the retraction rate is 95%; the temperature in the heat treatment tank was 110 ℃.
The invention has the beneficial effects that:
according to the wear-resistant artificial grass silk fiber and the preparation method thereof, the kaolin is used as the filler to be added into the polymer, so that the mechanical property, wear resistance and the like of the plastic can be remarkably improved, but due to poor compatibility of the kaolin as an inorganic substance and an organic substance, the dopamine is used for modifying the kaolin and then is added into the polymer, and the dopamine can be coated on the surface of the kaolin, so that the surface energy and polarity of the kaolin are reduced, the kaolin can be easily combined with high polymer substances, the dispersion stability of the kaolin in the polymer can be remarkably improved, the consumption of the kaolin can be reduced, and the polymer shows good wear resistance; secondly, the surface of the negative ion powder is hydrophilic and oleophobic, is easy to agglomerate, is directly added into a monomer, and cannot be dispersed and rapidly precipitated; the coupling agent is a substance with an amphoteric structure, one part of groups in the molecule can react with chemical groups (-OH) on the surface of the negative ion powder crystal to form strong chemical bonding, and the other part of groups have the property of organophilic matters and can form good bonding with monomers; therefore, the negative ion powder is subjected to surface modification treatment by using the coupling agent, so that the negative ion powder can be changed from hydrophilicity to lipophilicity, and the aim of good dispersion state in the monomer is fulfilled; the invention prepares the negative ion microsphere after stabilizing the fine negative ion powder, and melts the negative ion microsphere and the polymer, thereby preparing the negative ion plastic with good performance and environmental protection; the polymer microsphere is a novel functional material with excellent performance, namely a material with the particle size ranging from nano level to micro level, is a novel high polymer material with excellent performance, has large specific surface area, is easy to recycle and relatively low in price, and has high permeability and mobility when polymer particles move due to gravity, an electric field and Brownian in a medium; the dispersion emulsion of the polymer microspheres can be stably present for a long time due to electrostatic discharge effect, van der Waals force effect and volume repulsion effect between particles.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the invention, dopamine is selected from the company responsible for the biological science and technology of Synbomen, kaolin is selected from the company responsible for the chemical industry and technology of Shanghai, a compatilizer is selected from YP510 of the company Limited for the reputation of Huizhou, and an antioxidant is selected from antioxidant 1010 of the company Limited for the chemical industry of Nanjing.
The wear-resistant artificial grass silk fiber comprises the following materials in parts by weight:
low density polyethylene: 75-85 parts;
dopamine: 0.3-0.5 part;
kaolin: 3-5 parts;
negative ion microsphere: 16-20 parts;
processing aid: 0.7-0.8 part;
color master batch: 3-4 parts;
wherein the density of the low density polyethylene is 0.920g/cm 3 -0.925g/cm 3 ；
The anion microsphere comprises the following components in parts by weight: modified powder: 55-60 parts; 15% polyvinyl alcohol: 35-40 parts; 2, 2-dioxyacetophenone initiator: 0.5 to 1.5 parts; polyurethane PU:1 to 3.5 parts;
the modified powder comprises the following components in parts by mass: negative ion powder: 25-40 parts; methyl methacrylate monomer: 60-75 parts; silane coupling agent: 1.5-2 parts; the mesh number of the negative ion powder is 3000 meshes;
the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.4-0.7 parts; an antioxidant: 0.05 to 0.2 parts.
A method for preparing wear-resistant artificial grass silk fiber, which comprises the following steps:
s1, preparing kaolin suspension:
adding kaolin into a beaker containing deionized water while stirring, pouring triaminomethane into the beaker after stirring is completed, adjusting the pH of the mixed solution to 8, then adding dopamine, stirring for two hours by a magnetic stirrer at room temperature, and uniformly mixing to obtain a kaolin suspension;
s2, preparing dopamine modified kaolin:
putting the kaolin suspension prepared in the step S1 into a centrifugal machine with the rotating speed of 11000rpm/min for centrifugation for 20 minutes, washing the centrifuged kaolin after centrifugation, and drying the washed kaolin to constant weight at the temperature of 80 ℃ to prepare the dopamine modified kaolin;
s3, preparing modified powder:
placing the negative ion powder and the silane coupling agent into a three-neck flask, and adding ethanol which is 2.5 times of the total mass of the negative ion powder and the silane coupling agent into the three-neck flask to serve as a solvent; mixing and stirring anion powder, a silane coupling agent and an ethanol solution for 30min at room temperature, then introducing nitrogen into the mixed solution, heating and refluxing for two hours, then taking out the mixed solution, filtering, drying, grinding and refining to obtain modified powder with stable surface;
s4, preparing negative ion microspheres:
adding the modified powder prepared in the step S3 into a reaction bottle, adding deionized water and polyvinyl alcohol into the reaction bottle, heating and dissolving the mixed material in the reaction bottle, adding methyl methacrylate monomer, stirring again for dispersing for 1 hour, raising the temperature to 70 ℃, and polymerizing for 4 hours; then heating to 80 ℃, preserving heat for 2 hours, closing nitrogen gas inlet after heat preservation, cooling to 50 ℃, and finally carrying out suction filtration, washing and drying on the mixed material to obtain the anion microsphere;
s5, preparing grass silk fibers:
adding the dopamine modified kaolin prepared in the step S2 and the anion microsphere prepared in the step S4, and the low-density polyethylene, the processing aid, the masterbatch, the polyurethane and the 2, 2-dioxyacetophenone initiator into a high-speed mixer in proportion for mixing, adding the materials into an extruder for extrusion wire drawing after the materials are uniformly mixed, and then rolling after passing through a hot stretching box and a heat treatment box; wherein the temperature in the hot stretching box is 135 ℃, the stretching ratio of the hot stretching box is 1:3, and the retraction rate is 95%; the temperature in the heat treatment tank was 110 ℃.
It should be noted that the temperatures of each section of the extruder from the feeding end to the discharging end are as follows: temperature of the machine head: 120-140 ℃; a region: 170-190 ℃; two areas: 175-195 deg.c; three regions: 175-195 deg.c; four regions: 175-195 deg.c.
In the invention, the release amount of negative ions needs to be determined, so that the negative ion plastic with good performance and environmental protection can be prepared, and experimental data and experimental results of examples 1 to 6 are shown in the following tables 1 to 4:
the following table 1 shows the material ratios of examples 1 to 6 according to the present invention:
TABLE 1
| Material | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Low density polyethylene | 80 | 80 | 80 | 80 | 80 | 80 |
| Dopamine | 0.3 | 0.4 | 0.3 | 0.5 | 0.4 | 0.5 |
| Kaolin clay | 3 | 3 | 4 | 4 | 5 | 6 |
| Negative ion microsphere | 15 | 15 | 18 | 18 | 20 | 20 |
| Processing aid | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| Color master batch | 3 | 3 | 3 | 3 | 3 | 3 |
The following Table 2 shows the material ratios of the anion microspheres and the processing aids in Table 1:
TABLE 2
The following table 3 shows the material ratios of the modified powders in table 2:
TABLE 3 Table 3
Table 4 below shows the experimental results of examples 1 to 6 according to the present invention:
TABLE 4 Table 4
| Description of the embodiments | Coefficient of friction | Abrasion loss | Amount of negative ion released (per cm) 3 ) |
| Example 1 | 0.78 | 0.86 | 3000 |
| Example 2 | 0.86 | 0.46 | 3200 |
| Example 3 | 1.02 | 0.53 | 3200 |
| Example 4 | 0.80 | 0.83 | 4200 |
| Example 5 | 0.79 | 0.85 | 3800 |
| Example 6 | 0.78 | 0.85 | 3500 |
In the stage study, a plastic block with a cutting size of 1 x 1cm and a thickness of 1cm was used as a standard block for testing the release amount of negative ions. The sample was tested against the negative ion detector. The distance between the surface of the tested sample and the testing end of the instrument is zero, otherwise the sensitivity of the instrument is affected.
The negative ion powder has the function of releasing negative ions, and the negative ion powder is modified due to poor compatibility with the polymer, so that the surface energy is reduced, the compatibility with the polymer is enhanced, and further more negative ions are released due to good dispersion in the polymer. Excessive negative ion microspheres are dispersed in PE to generate agglomeration, so that the negative ion release amount is reduced.
The following Table 5 shows the material ratios of comparative examples 1 and 2 according to the present invention:
TABLE 5
| Material | Comparative example 1 | Comparative example 2 |
| Low density polyethylene | 80 | 80 |
| Dopamine | 0.3 | 0.4 |
| Kaolin clay | 4 | 3 |
| Negative ion microsphere | 18 | 18 |
| Processing aid | 0.8 | 0.8 |
The following Table 6 shows the material ratios of the negative ion microspheres and the processing aids in Table 5:
TABLE 6
The following table 7 shows the material ratios of the modified powders in table 6:
TABLE 7
Table 8 below shows the experimental results of comparative examples 1 and 2 according to the present invention:
TABLE 8
| Description of the embodiments | Coefficient of friction | Abrasion loss | Amount of negative ion released (per cm) 3 ) |
| Comparative example 1 | 0.78 | 0.86 | 3000 |
| Comparative example 2 | 0.86 | 0.46 | 3200 |
The dopamine is used for modifying the kaolin, the dopamine is coated on the surface of the kaolin, and the dopamine is an organic substance and has good compatibility with high molecular substances. Dopamine is a green modifier, and the modification of the carbon nano tube by the dopamine does not influence the structure of the kaolin and the stability in PE, the dopamine forms polydopamine through self-polymerization, and the polydopamine is adsorbed on the surface of the outer wall of the kaolin through non-covalent action.
The invention has been described above with reference to preferred embodiments, but the scope of the invention is not limited thereto, and any and all technical solutions falling within the scope of the claims are within the scope of the invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.
Claims (6)
1. The wear-resistant artificial grass silk fiber is characterized by comprising the following materials in parts by weight:
low density polyethylene: 75-85 parts;
dopamine: 0.3-0.5 part;
kaolin: 3-5 parts;
negative ion microsphere: 16-20 parts;
processing aid: 0.7-0.8 part;
color master batch: 3-4 parts;
wherein the density of the low density polyethylene is 0.920g/cm 3 -0.925g/cm 3 ；
The negative ion microsphere comprises the following components in parts by mass: modified powder: 55-60 parts; 15% polyvinyl alcohol: 35-40 parts; 2, 2-dioxyacetophenone initiator: 0.5 to 1.5 parts; polyurethane PU:1 to 3.5 parts;
the modified powder comprises the following components in parts by weight: negative ion powder: 25-40 parts; methyl methacrylate monomer: 60-75 parts; silane coupling agent: 1.5-2 parts; the mesh number of the negative ion powder is 3000 meshes;
the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.4-0.7 parts; an antioxidant: 0.05 to 0.2 parts.
2. An abrasion resistant artificial grass fibre according to claim 1, characterised in that it comprises the following materials in parts by mass:
low density polyethylene: 80 parts;
dopamine: 0.5 parts;
kaolin: 4 parts;
negative ion microsphere: 18 parts;
processing aid: 0.7 parts;
color master batch: 3 parts;
wherein, the anion microsphere comprises the following components in parts by mass: modified powder: 58 parts; 15% polyvinyl alcohol: 35 parts; 2, 2-dioxyacetophenone initiator: 1 part; polyurethane: 2 parts;
the modified powder comprises the following components in parts by weight: negative ion powder: 35 parts; silane coupling agent: 2 parts; methyl methacrylate monomer: 65 parts;
the processing aid comprises the following components in parts by mass: and (3) a compatilizer: 0.6 parts; an antioxidant: 0.2 parts.
3. The wear resistant artificial grass filament fiber of claim 1, wherein said compatibilizer is selected from the group consisting of model YP510 from the company of repulper chemical, inc. In huizhou, and said antioxidant is selected from the group consisting of model antioxidant 1010 from the company of chemical, inc. In south kyi.
4. A method for producing an abrasion resistant artificial grass filament according to claims 1-3, comprising the steps of:
s1, preparing kaolin suspension:
adding kaolin into a beaker containing deionized water while stirring, pouring triaminomethane into the beaker after stirring is completed, adjusting the pH of the mixed solution to 8, then adding dopamine, stirring for two hours by a magnetic stirrer at room temperature, and uniformly mixing to obtain a kaolin suspension;
s2, preparing dopamine modified kaolin:
putting the kaolin suspension prepared in the step S1 into a centrifugal machine with the rotating speed of 11000rpm/min for centrifugation for 20 minutes, washing the centrifuged kaolin after centrifugation, and drying the washed kaolin to constant weight at the temperature of 80 ℃ to prepare the dopamine modified kaolin;
s3, preparing modified powder:
placing the negative ion powder and the silane coupling agent into a three-neck flask, and adding ethanol which is 2.5 times of the total mass of the negative ion powder and the silane coupling agent into the three-neck flask to serve as a solvent; mixing and stirring anion powder, a silane coupling agent and an ethanol solution for 30min at room temperature, then introducing nitrogen into the mixed solution, heating and refluxing for two hours, then taking out the mixed solution, filtering, drying, grinding and refining to obtain modified powder with stable surface;
s4, preparing negative ion microspheres:
adding the modified powder prepared in the step S3 into a reaction bottle, adding deionized water and polyvinyl alcohol into the reaction bottle, heating and dissolving the mixed material in the reaction bottle, adding methyl methacrylate monomer, stirring again for dispersing for 1 hour, raising the temperature to 70 ℃, and polymerizing for 4 hours; then heating to 80 ℃, preserving heat for 2 hours, closing nitrogen gas inlet after heat preservation, cooling to 50 ℃, and finally carrying out suction filtration, washing and drying on the mixed material to obtain the anion microsphere;
s5, preparing grass silk fibers:
adding the dopamine modified kaolin prepared in the step S2 and the anion microsphere prepared in the step S4, low-density polyethylene, a processing aid, masterbatch, polyurethane and a 2, 2-dioxyacetophenone initiator into a high-speed mixer in proportion, mixing, adding the materials into an extruder for extrusion wire drawing after uniform mixing, and then rolling after passing through a hot stretching box and a heat treatment box.
5. The method for producing an abrasion resistant artificial grass filament according to claim 4, wherein the temperatures of the sections of the extruder from the feed end to the discharge end are as follows: temperature of the machine head: 120-140 ℃; a region: 170-190 ℃; two areas: 175-195 deg.c; three regions: 175-195 deg.c; four regions: 175-195 deg.c.
6. The method for producing an abrasion resistant artificial grass filament according to claim 4, wherein the temperature in the hot stretching tank is 135 ℃, the stretching ratio of the hot stretching tank is 1:3, and the retraction rate is 95%; the temperature in the heat treatment tank was 110 ℃.
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