CN114130120A - Waterproof high-wear-resistance PTFE filter material and preparation method thereof - Google Patents
Waterproof high-wear-resistance PTFE filter material and preparation method thereof Download PDFInfo
- Publication number
- CN114130120A CN114130120A CN202111217386.8A CN202111217386A CN114130120A CN 114130120 A CN114130120 A CN 114130120A CN 202111217386 A CN202111217386 A CN 202111217386A CN 114130120 A CN114130120 A CN 114130120A
- Authority
- CN
- China
- Prior art keywords
- ptfe
- nano sio
- wear
- filter material
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 266
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 233
- 239000000463 material Substances 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title claims abstract description 59
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 112
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 112
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 112
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 112
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 112
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 112
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 239000006185 dispersion Substances 0.000 claims abstract description 64
- 239000002131 composite material Substances 0.000 claims abstract description 63
- 238000005470 impregnation Methods 0.000 claims abstract description 63
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000002156 mixing Methods 0.000 claims abstract description 51
- 238000003756 stirring Methods 0.000 claims abstract description 39
- 239000000839 emulsion Substances 0.000 claims abstract description 31
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 21
- 238000009998 heat setting Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000008399 tap water Substances 0.000 claims description 30
- 235000020679 tap water Nutrition 0.000 claims description 30
- 239000003822 epoxy resin Substances 0.000 claims description 17
- 239000004744 fabric Substances 0.000 claims description 17
- 229920000647 polyepoxide Polymers 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 16
- 239000004925 Acrylic resin Substances 0.000 claims description 15
- 229920000178 Acrylic resin Polymers 0.000 claims description 15
- 238000009960 carding Methods 0.000 claims description 15
- ZTMNRKZFOYFOIE-UHFFFAOYSA-N 1-butoxyhexyl acetate Chemical compound C(C)(=O)OC(CCCCC)OCCCC ZTMNRKZFOYFOIE-UHFFFAOYSA-N 0.000 claims description 14
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000011265 semifinished product Substances 0.000 claims description 3
- YVRYNXUEZTXSDZ-UHFFFAOYSA-N 1-butoxyhexan-1-ol Chemical compound CCCCCC(O)OCCCC YVRYNXUEZTXSDZ-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002105 nanoparticle Substances 0.000 abstract description 3
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000011068 loading method Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910021392 nanocarbon Inorganic materials 0.000 description 2
- 238000003921 particle size analysis Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- FJQXCDYVZAHXNS-UHFFFAOYSA-N methadone hydrochloride Chemical group Cl.C=1C=CC=CC=1C(CC(C)N(C)C)(C(=O)CC)C1=CC=CC=C1 FJQXCDYVZAHXNS-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention provides a preparation method of a waterproof high-wear-resistance PTFE filter material, which comprises the following steps: (1) water taking and nano SiO2Mixing, adding sodium dodecyl sulfate and ethylene glycol at a ratio of 1:2, stirring on a temperature magnetic stirrer to obtain nano SiO2A dispersion liquid; (2) the prepared nano SiO2Mixing the dispersion with PTFE emulsion and water at a ratio of 0.5-2:1:13, adding film-forming assistant, and stirring with magnetic stirrer to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; (3) through the dipping-pressing process, the prepared nano SiO2the/PTFE composite film-forming impregnation liquid is uniformly dispersed into the PTFE needled felt, and the waterproof and high-wear-resistant PTFE filter material is obtained through high-temperature heat setting. The invention has the beneficial effects that: the addition amount of sodium dodecyl sulfate and glycol is adjusted to ensure that the nano SiO is prepared2Can be effectively dispersed in the composite emulsion for a long time (more than 2 h), presents a suspension state without sedimentation, and effectively avoids the phenomenon of SiO2The nano particles are precipitated to influence the actual loading efficiency of the PTFE filter materialThe situation is.
Description
Technical Field
The invention relates to the technical field of production of environment-friendly materials, in particular to a waterproof high-wear-resistance PTFE filter material and a preparation method thereof.
Background
The bag type dust collector is used as a dry type dust collection device, has high dust collection efficiency, can reach more than 99% of dust collection efficiency under normal conditions, is simple in structure and convenient to maintain, and has lower manufacturing cost than an electric dust collector under the condition of ensuring the same dust collection efficiency, so that the application range of the bag type dust collector is wider. Polytetrafluoroethylene is also called Teflon (Teflon), has the reputation of plastic king, and has good chemical stability, high temperature resistance and oxidation resistance; PTFE short fibers prepared from polytetrafluoroethylene resin by a membrane cracking method are needled to form a PTFE filter material, so that a PTFE filter bag is prepared, the PTFE filter bag has good chemical stability, PTFE can resist high temperature, the continuous use temperature can reach 260 ℃, and the instantaneous temperature can reach 280 ℃; therefore, the PTFE filter bag is suitable for the smoke treatment in the complex working condition processes of coal-fired boilers, waste incineration, chemical production and the like.
However, the wear resistance of the PTFE filter bag is general, and when the PTFE filter bag is continuously rubbed, the PTFE filter bag is damaged, so that the dust filtering efficiency is influenced; meanwhile, the PTFE filter bag is also stuck in the using process, so that the dust filtering efficiency is influenced, and the improvement of the waterproof performance of the PTFE filter bag is beneficial to the reduction of the sticking phenomenon; for example, a reference document with publication number CN 105755823A discloses a method for performing PTFE impregnation treatment on a filter material, which comprises the following steps: step one, preparing a steeping liquor; step two, dipping treatment; step three, drying in an oven; in the first step, the impregnation liquid is prepared by mixing PTFE emulsion, an antioxidant, a titanate coupling agent, an adhesive, nano carbon black particles, epoxy resin and deionized water; in the second step, the filter material is dipped in the dipping solution and then is pressed by a glue spreader to remove the solution; in the third step, the rolled filter material is dried in an oven at the temperature of 120-210 ℃ for 5-7 min; the impregnation liquid used in the process is the mixture of PTFE emulsion, an antioxidant, a titanate coupling agent, an adhesive, nano carbon black particles, epoxy resin and deionized water, and the impregnation liquid has a common dispersion effect and can not suspend for a long time, so that the impregnation of a filter material at the later stage is influenced, and the performance of the filter material is further influenced.
Disclosure of Invention
The invention aims to provide a PTFE filter material with excellent waterproof and wear-resisting properties.
The invention solves the technical problems through the following technical means:
a preparation method of a waterproof high-wear-resistance PTFE filter material comprises the following steps:
(1) preparation of nano SiO2Dispersion liquid: water taking and nano SiO2Mixing, adding sodium dodecyl sulfate and ethylene glycol at a ratio of 1:2, stirring on a temperature magnetic stirrer to obtain nano SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and water at a ratio of 0.5-2:1:13, adding film-forming assistant, and stirring with magnetic stirrer to obtain nanometer SiO2PTFE composite film-forming impregnation liquid;
(3) preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2the/PTFE composite film-forming impregnation liquid is uniformly dispersed into the PTFE needled felt, and the waterproof and high-wear-resistant PTFE filter material is obtained through high-temperature heat setting.
Has the advantages that: the production process is simple, the wear resistance and the water resistance of the PTFE filter material can be improved without special treatment on the PTFE filter material, and the rapid industrialization is convenient to realize; the invention takes PTFE emulsion as a film forming material and nanometer SiO2Is hydrophobic and wear-resistant filler, so that the gaps of the PTFE filter material are filled with nano SiO2And the PTFE emulsion can not only fill the gaps of the filter material, but also form a film on the surface of the filter material. The invention adds sodium dodecyl sulfate and glycol to prepare the nano SiO2Can be effectively dispersed in the composite emulsion for a long time (more than 2 h), presents a suspension state without sedimentation, and effectively avoids the phenomenon of SiO2The nano particles are precipitated, so that the actual loading efficiency of the PTFE filter material is influenced, and the practical industrial application is facilitated. The invention can use dipping-rolling technique to make nano SiO2The PTFE composite film-forming impregnation liquid is uniformly dispersed into the PTFE semi-finished product needled felt, so that the nano SiO is obtained2And the PTFE emulsion can uniformly enter pores of the PTFE needled felt; meanwhile, the film forming agent is added into the composite emulsion, so that the PTFE emulsion can form a film on the surface of the PTFE filter material to form nano SiO2Sealed in the pores of the PTFE needled felt, thereby improving the wear resistance and the waterproofness of the PTFE filter material.
Preferably, (1) preparing nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g-4g sodium dodecyl sulfate and 1.2g-8g ethylene glycol, stirring on a temperature magnetic stirrer to obtain nano SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 0.5-2:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer to obtain nanometer SiO2PTFE composite film-forming impregnation liquid;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt;
(4) preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Preferably, the temperature of the temperature magnetic stirrer in the step (1) is 80 ℃, and the stirring time is 2 hours; and (3) stirring time of the magnetic stirrer in the step (2) is 30 min.
Preferably, the film forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate.
Preferably, the grammage control of the PTFE needled feltMade at 780-2。
Preferably, (1) preparing nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g sodium dodecyl sulfate and 1.2g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 0.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 780g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Preferably, (1) preparing nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 1.5g sodium dodecyl sulfate and 3g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 1:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: will PTFE short fibers are subjected to opening, mixing, fine opening, carding, lapping, base cloth adding and needling to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 795g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Preferably, (1) preparing nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 2.5g sodium dodecyl sulfate and 5g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 1.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 815g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Preferably, (1) preparing nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 4g sodium dodecyl sulfate and 8g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 2:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 830g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
The invention also discloses a waterproof high-wear-resistance PTFE filter material prepared by the preparation method of any one of the technical schemes.
Has the advantages that: PTFE filter material is processed by SiO2After the/PTFE composite film-forming liquid is treated, the wear resistance is improved by more than 30 percent, and the waterproof performance reaches 5 grades.
The invention has the advantages that:
the invention adds sodium dodecyl sulfate and glycol to prepare the nano SiO2Can be effectively dispersed in the composite emulsion for a long time (more than 2 h), presents a suspension state without sedimentation, and effectively avoids the phenomenon of SiO2The nano particles are precipitated, the actual load efficiency of the PTFE filter material is influenced, on one hand, the PTFE filter material is convenient for actual industrial application, and on the other hand, the wear resistance and the waterproofness of the PTFE filter material can be improved by improving the actual load efficiency of the PTFE filter material.
The PTFE filter material is processed by SiO2The wear resistance of the composite PTFE film forming liquid is improved by more than 30 percent, and the waterproof performance reaches 5 grades.
The invention can use dipping-rolling technique to make nano SiO2Composite of/PTFEThe membrane impregnation liquid is uniformly dispersed into the PTFE semi-finished product needled felt, so that the nano SiO is obtained2And the PTFE emulsion can uniformly enter pores of the PTFE needled felt; meanwhile, the film forming agent is added into the composite emulsion, so that the PTFE emulsion can form a film on the surface of the PTFE filter material to form nano SiO2Sealed in the pores of the PTFE needled felt, thereby improving the wear resistance and the waterproofness of the PTFE filter material.
Drawings
FIG. 1 is an SEM image of a waterproof and highly wear-resistant PTFE filter material in an example;
FIG. 2 is a graph showing abrasion resistance indexes before and after abrasion of the waterproof highly abrasion-resistant PTFE filter materials prepared in examples 1 to 4 and comparative example 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
Example 1
A preparation method of a waterproof high-wear-resistance PTFE filter material comprises the following steps:
(1) preparation of nano SiO2Dispersion liquid
200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g sodium dodecyl sulfate and 1.2g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
the obtained nano SiO2The dispersion has good dispersion effect and can be suspended for a long timeFloat, ensure the subsequent nano SiO2The preparation of the PTFE composite film-forming impregnation liquid is realized;
(2) preparation of nano SiO2PTFE composite film forming impregnation liquid
The prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 0.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparation of PTFE needled felt
Opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight is controlled to be 780g/m2；
(4) Preparing waterproof high-wear-resistance PTFE filter material
As shown in fig. 1, the nano SiO prepared in step (2) is processed by a dipping-rolling process2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Example 2
A preparation method of a waterproof high-wear-resistance PTFE filter material comprises the following steps:
(1) preparation of nano SiO2Dispersion liquid
200mL of tap water and 6g of nano SiO are taken2Mixing, adding 1.5g sodium dodecyl sulfate and 3g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
the obtained nano SiO2The dispersion liquid has good dispersion effect, can suspend for a long time, and ensures the subsequent nano SiO2The preparation of the PTFE composite film-forming impregnation liquid is realized;
(2) preparation of nano SiO2PTFE composite film forming impregnation liquid
The prepared nano SiO2The dispersion was mixed with PTFE emulsion, tap water and 1:1:13, and 2g of a film-forming assistant was added thereto under magnetic forceStirring for 30min on a stirrer to prepare the nano SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparation of PTFE needled felt
Opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight is controlled to be 795g/m2；
(4) Preparing waterproof high-wear-resistance PTFE filter material
As shown in fig. 1, the nano SiO prepared in step (2) is processed by a dipping-rolling process2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Example 3
A preparation method of a waterproof high-wear-resistance PTFE filter material comprises the following steps:
(1) preparation of nano SiO2Dispersion liquid
200mL of tap water and 6g of nano SiO are taken2Mixing, adding 2.5g sodium dodecyl sulfate and 5g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
the obtained nano SiO2The dispersion liquid has good dispersion effect, can suspend for a long time, and ensures the subsequent nano SiO2The preparation of the PTFE composite film-forming impregnation liquid is realized;
(2) preparation of nano SiO2PTFE composite film forming impregnation liquid
The prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 1.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparation of PTFE needled felt
Opening, mixing, fine opening and loosening PTFE short fibers,Carding, lapping, adding base cloth and needling to prepare a semi-finished PTFE needled felt; the gram weight is controlled at 815g/m2；
(4) Preparing waterproof high-wear-resistance PTFE filter material
As shown in fig. 1, the nano SiO prepared in step (2) is processed by a dipping-rolling process2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
Example 4
A preparation method of a waterproof high-wear-resistance PTFE filter material comprises the following steps:
(1) preparation of nano SiO2Dispersion liquid
200mL of tap water and 6g of nano SiO are taken2Mixing, adding 4g sodium dodecyl sulfate and 8g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
the obtained nano SiO2The dispersion liquid has good dispersion effect, can suspend for a long time, and ensures the subsequent nano SiO2The preparation of the PTFE composite film-forming impregnation liquid is realized;
(2) preparation of nano SiO2PTFE composite film forming impregnation liquid
The prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 2:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparation of PTFE needled felt
Opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight is controlled to be 830g/m2；
(4) Preparing waterproof high-wear-resistance PTFE filter material
As shown in fig. 1, the nano SiO prepared in step (2) is processed by a dipping-rolling process2The PTFE composite film-forming impregnation liquid is uniformly dispersed into the step (3)And in the prepared semi-finished PTFE needled felt, obtaining the waterproof and high-wear-resistance PTFE filter material through high-temperature heat setting.
Comparative example 1
A preparation method of a PTFE filter material comprises the following steps:
(1) preparation of PTFE film-forming impregnating solution
Mixing PTFE emulsion and tap water in a ratio of 1:13, adding 2g of film-forming assistant, and stirring on a magnetic stirrer for 30min to prepare PTFE film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(2) preparation of PTFE needled felt
Opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight is controlled to be 780g/m2；
(3) Preparation of PTFE Filter Material
And (3) uniformly dispersing the PTFE film-forming impregnation liquid prepared in the step (1) into the semi-finished PTFE needled felt prepared in the step (2) through an impregnation-pressing process, and obtaining the PTFE filter material through high-temperature heat setting.
Comparative example 2
Nano SiO2A method of preparing a dispersion comprising the steps of:
200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g polyvinylpyrrolidone (PVP) and 1.2g n-butanol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2And (3) dispersing the mixture.
Table 1 shows the results of the wear resistance tests of the PTFE filter materials prepared in examples 1 to 4 and comparative example 1.
Table 2 is a table of the water resistance ratings of the PTFE filter materials prepared in examples 1-4 and comparative example 1.
| Example 1 | Grade 5 |
| Example 2 | Grade 5 |
| Example 3 | Grade 5 |
| Example 4 | Grade 5 |
| Comparative example 1 | 4-5 stages |
Table 3 shows the nano SiO prepared in examples 1-4 and comparative example 22Particle size analysis data of the dispersion.
| D10 | D50 | D90 | |
| Example 1 | 1.909 | 4.656 | 9.363 |
| Example 2 | 1.804 | 4.542 | 9.124 |
| Example 3 | 1.851 | 4.534 | 9.173 |
| Example 4 | 1.861 | 4.319 | 9.121 |
| Comparative example 2 | 2.896 | 6.345 | 12.478 |
The performance test method comprises the following steps:
(1) and (3) wear resistance test:
the test instrument is a Martindale wear-resistant tester, and the sample is a circular sample in the clamp;
the test method comprises the following steps: under a specified load, the plane motion with the locus as a Lissajious graph rubs with an abrasive material (namely a standard fabric), a sample clamp can freely rotate around an axis which is vertical to the horizontal plane, and the wear resistance of the fabric is determined according to a mass loss method;
abrasion resistance index n/delta m
In the formula: n: total number of rubs in units of times;
Δ m: the mass loss of the sample in milligrams (mg) at the total number of rubs.
(2) And (3) waterproof testing: the method adopts a standard GBT 4745 and 2012 textile waterproof performance test and a standard water-soaking method and a GB/T19977 and 2014 textile oil-repellent hydrocarbon resistance test to carry out measurement;
table 4 is a waterproof performance evaluation table.
(3) And (3) particle size testing: adopting GOST R8.777-2011 national measurement consistency guarantee system, and adopting BT-9300ST laser particle size distribution instrument to measure SiO prepared by different methods2Particle size of the dispersion.
As can be seen from Table 1 and FIG. 2, the PTFE filter materials prepared in examples 1 to 4 all have high wear resistance; as can be seen from Table 2, the water resistance ratings of examples 1-4 all reached 5; as can be seen from Table 3, the addition of different surfactants and co-surfactants resulted in nano SiO2The dispersion degree of the nano SiO is different, and according to the particle size analysis test result, after the sodium dodecyl sulfate and the ethylene glycol are added, the nano SiO2Has good dispersion effect, thereby being capable of stably dispersing for a long time and being convenient for industrial application.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the waterproof high-wear-resistance PTFE filter material is characterized by comprising the following steps of:
(1) preparation of nano SiO2Dispersion liquid: water taking and nano SiO2Mixing, adding sodium dodecyl sulfate and ethylene glycol at a ratio of 1:2, stirring on a temperature magnetic stirrer to obtain nano SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and water at a ratio of 0.5-2:1:13, adding film-forming assistant, and stirring with magnetic stirrer to obtain nanometer SiO2PTFE composite film-forming impregnation liquid;
(3) preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2the/PTFE composite film-forming impregnation liquid is uniformly dispersed into the PTFE needled felt, and the waterproof and high-wear-resistant PTFE filter material is obtained through high-temperature heat setting.
2. The preparation method of the waterproof high-wear-resistance PTFE filter material according to claim 1, which is characterized by comprising the following steps:
(1) preparation of nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g-4g sodium dodecyl sulfate and 1.2g-8g ethylene glycol, stirring on a temperature magnetic stirrer to obtain nano SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 0.5-2:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer to obtain nanometer SiO2PTFE composite film-forming impregnation liquid;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt;
(4) preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2The PTFE composite film-forming impregnation liquid is uniformly dispersed to the step (3)) In the semi-finished product PTFE needled felt prepared in the step (1), the waterproof high-wear-resistance PTFE filter material is obtained through high-temperature heat setting.
3. The preparation method of the waterproof high-wear-resistance PTFE filter material according to claim 1 or 2, which is characterized in that: the temperature of the temperature magnetic stirrer in the step (1) is 80 ℃, and the stirring time is 2 hours; and (3) stirring time of the magnetic stirrer in the step (2) is 30 min.
4. The preparation method of the waterproof high-wear-resistance PTFE filter material according to claim 1 or 2, which is characterized in that: the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate.
5. The preparation method of the waterproof high-wear-resistance PTFE filter material according to claim 1 or 2, which is characterized in that: the gram weight of the PTFE needled felt is controlled to be 780-830g/m2。
6. The preparation method of the waterproof high-wear-resistance PTFE filter material as claimed in claim 2, which is characterized by comprising the following steps:
(1) preparation of nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 0.6g sodium dodecyl sulfate and 1.2g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 0.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: the PTFE short fiber is made into a semi-finished PTFE needle through opening, mixing, fine opening, carding, lapping, adding base cloth and needlingFelting; the gram weight of the PTFE needled felt is controlled to be 780g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
7. The preparation method of the waterproof high-wear-resistance PTFE filter material as claimed in claim 2, which is characterized by comprising the following steps:
(1) preparation of nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 1.5g sodium dodecyl sulfate and 3g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 1:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 795g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
8. The preparation method of the waterproof high-wear-resistance PTFE filter material as claimed in claim 2, which is characterized by comprising the following steps:
(1) preparation of nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 2.5g sodium dodecyl sulfate and 5g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 1.5:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming auxiliary agent is one of 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetate;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 815g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
9. The preparation method of the waterproof high-wear-resistance PTFE filter material as claimed in claim 2, which is characterized by comprising the following steps:
(1) preparation of nano SiO2Dispersion liquid: 200mL of tap water and 6g of nano SiO are taken2Mixing, adding 4g sodium dodecyl sulfate and 8g ethylene glycol, stirring at 80 deg.C for 2 hr to obtain nanometer SiO2A dispersion liquid;
(2) preparation of nano SiO2PTFE composite film-forming impregnation liquid: the prepared nano SiO2Mixing the dispersion with PTFE emulsion and tap water at a ratio of 2:1:13, adding 2g film-forming assistant, and stirring with magnetic stirrer for 30min to obtain nanometer SiO2PTFE composite film-forming impregnation liquid; the film-forming assistant is selected from 3-ethoxy ethyl propionate EEP, acrylic resin, epoxy resin and hexanediol butyl ether acetateOne kind of the material is selected;
(3) preparing PTFE (polytetrafluoroethylene) needled felt: opening, mixing, finely opening, carding, lapping, adding base cloth and needling PTFE short fibers to prepare a semi-finished PTFE needled felt; the gram weight of the PTFE needled felt is controlled to be 830g/m2；
(4) Preparing a waterproof high-wear-resistance PTFE filter material: the nano SiO prepared in the step (2) is dipped and rolled2And (3) uniformly dispersing the/PTFE composite film-forming impregnation liquid into the semi-finished PTFE needled felt prepared in the step (3), and performing high-temperature heat setting to obtain the waterproof and high-wear-resistant PTFE filter material.
10. A waterproof high wear-resistant PTFE filter prepared by the preparation method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217386.8A CN114130120A (en) | 2021-10-19 | 2021-10-19 | Waterproof high-wear-resistance PTFE filter material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217386.8A CN114130120A (en) | 2021-10-19 | 2021-10-19 | Waterproof high-wear-resistance PTFE filter material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114130120A true CN114130120A (en) | 2022-03-04 |
Family
ID=80394442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217386.8A Pending CN114130120A (en) | 2021-10-19 | 2021-10-19 | Waterproof high-wear-resistance PTFE filter material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114130120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253486A (en) * | 2022-08-16 | 2022-11-01 | 朗天科技股份有限公司 | High-wear-resistance dedusting filter material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010240576A (en) * | 2009-04-06 | 2010-10-28 | Techno M:Kk | Surface processing method of filter, needle filter, and woven filter |
| CN103505943A (en) * | 2013-07-26 | 2014-01-15 | 江南大学 | Preparation method of wear-resistant and antioxidant polyphenylene sulfide filter |
| CN104861413A (en) * | 2015-06-09 | 2015-08-26 | 李平兰 | Method for preparing decorative interior acoustic insulating material |
| CN109173438A (en) * | 2018-09-05 | 2019-01-11 | 江苏明晶布业股份有限公司 | A kind of production technology of micropore PTFE acupuncture filter material |
-
2021
- 2021-10-19 CN CN202111217386.8A patent/CN114130120A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010240576A (en) * | 2009-04-06 | 2010-10-28 | Techno M:Kk | Surface processing method of filter, needle filter, and woven filter |
| CN103505943A (en) * | 2013-07-26 | 2014-01-15 | 江南大学 | Preparation method of wear-resistant and antioxidant polyphenylene sulfide filter |
| CN104861413A (en) * | 2015-06-09 | 2015-08-26 | 李平兰 | Method for preparing decorative interior acoustic insulating material |
| CN109173438A (en) * | 2018-09-05 | 2019-01-11 | 江苏明晶布业股份有限公司 | A kind of production technology of micropore PTFE acupuncture filter material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253486A (en) * | 2022-08-16 | 2022-11-01 | 朗天科技股份有限公司 | High-wear-resistance dedusting filter material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107618243B (en) | A kind of polymer modification graphene/Kynoar high-dielectric composite material and preparation method thereof | |
| CN114130120A (en) | Waterproof high-wear-resistance PTFE filter material and preparation method thereof | |
| CN108442179A (en) | A kind of plant fiber load graphene prepares paper substrate air filting material and preparation method thereof | |
| CN109954329A (en) | A kind of anti-haze filtering layer material of plant fiber self-supporting graphene and its preparation method and application | |
| KR20220044956A (en) | dispersant | |
| CN113122024B (en) | Nano-sheet layered carbon black emulsion and preparation method and application thereof | |
| CN109621737A (en) | The preparation method of the PTFE/PFA composite membrane of high porosity | |
| CN108192137B (en) | Preparation method of high-dispersion carbon nano tube used as rubber filler | |
| CN108071020A (en) | It is a kind of to be used to that filter bag of non-ferrous metal dust and preparation method thereof to be recovered by filtration | |
| Shen et al. | Antifouling hydrophilic electrostatic spinning PAN membrane based on click chemistry with high efficiency oil-water separation | |
| CN105038328A (en) | Process method for ceric oxide-coated rutile type titanium dioxide and coated titanium dioxide | |
| CN104844996A (en) | Carbon black filled PTFE microporous film and preparation method thereof | |
| CN114196178A (en) | Polylactic acid melt-blown non-woven composition, preparation method thereof and product prepared from polylactic acid melt-blown non-woven composition | |
| CN108192143B (en) | Method for modifying carbon nano tube used as rubber filler | |
| CN109824030A (en) | A kind of hollow carbon sphere and its preparation method and application | |
| CN115322590B (en) | Composite environment-friendly carbon black and preparation method thereof | |
| CN114345311B (en) | Super-hydrophobic fluorocarbon chain modified titanium dioxide and preparation method and application thereof | |
| CN109722899B (en) | Polyetherimide resin-based carbon fiber suspension sizing agent and preparation method thereof | |
| CN107325322A (en) | Modifying agent comprising nano material | |
| CN109438990A (en) | A kind of compound silicone oil emulsion and preparation method thereof | |
| Yang et al. | Preparation and properties of environmentally benign waterborne polyurethane composites from sodium-alginate-modified nano calcium carbonate | |
| CN114159890A (en) | Preparation method of high-wear-resistance dedusting filter material | |
| Liu et al. | One-pot facile synthesis of PDMS/PDMAEMA hybrid sponges for surfactant stabilized O/W emulsion separation | |
| CN110306250B (en) | Long-acting anti-static composite nylon fabric and preparation method thereof | |
| CN110373764B (en) | Antibacterial and antistatic graphene viscose yarn and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220304 |