Super-hydrophilic and anti-fouling cotton fabric for oil-water separation and zwitter-ion hydrogel for cotton fabric
A technology of oil-water separation and zwitterion, applied in gel preparation, colloid chemistry, colloid chemistry, etc., can solve the problems of hydrophobic oil-water separation membrane clogging, reduced service life, and reduced flux
Active Publication Date: 2021-07-06
SICHUAN UNIV
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Problems solved by technology
[0003] In view of the problems in the prior art, the present invention provides a cotton fabric with hydrophilic and anti-fouling properties, which has good oil-water separation ability and self-repair ability, and solves the problem that the membrane pores of the hydrophobic oil-water separation membrane are blocked by oil dirt, Causes problems of reduced flux and reduced service life
Method used
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[0023] A super-hydrophilic stain-resistant cotton fabric for oil-water separation, using cotton fabric as a base material, and zwitterionic hydrogel as a coating solution to form a hydrogel-coated cotton fabric.
[0024] Step 1, Synthesis of Zwitterionic Copolymer
[0025] s1, dissolve SBMA, HEA and AIBN (molar ratio 60:40:1, SBMA is 2 g) into 18 mL of ethanol and water mixture (5:1, v / v), stir at room temperature and pass N 2 Degas for 20 minutes; then in a closed vial, stir at 70°C for 15 h to react; at this time, a white precipitate precipitates out at the bottom of the vial;
[0026] s2, the white precipitate was dissolved in hot water at 70°C, added dropwise to cold ethanol, and the zwitterionic copolymer was precipitated from the solution, then centrifuged and the upper layer liquid was skimmed off, and repeated three times to purify the precipitate, and heated at 70°C Dry in a vacuum oven to obtain p(SBMA-co-HEA);
[0027] Step 2, Preparation of Cotton Fabric Coated w...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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The invention belongs to the field of oil-water separation, and particularly relates to a super-hydrophilic and anti-fouling cotton fabric for oil-water separation and zwitter-ion hydrogel for the cotton fabric. The super-hydrophilic and anti-fouling cotton fabric takes a cotton fabric as a base material and the zwitter-ion hydrogel as a coating solution, and a hydrogel coating cotton fabric is formed. The invention further provides a preparation method of the super-hydrophilic and anti-fouling cotton fabric and a preparation method of the zwitter-ion hydrogel. According to the invention, the problems that membrane holes of a hydrophobic oil-water separation membrane are blocked by oil stains, so that the flux is reduced and the service life is shortened are solved, the super-hydrophilicity, stability and self-repairing performance of the cotton fabric are achieved through the zwitter-ion hydrogel, and meanwhile the cotton fabric has good anti-fouling performance.
Description
technical field [0001] The invention belongs to the field of oil-water separation, and in particular relates to a super-hydrophilic anti-fouling cotton fabric used for oil-water separation and an amphoteric ion hydrogel used for the cotton fabric. Background technique [0002] Nowadays, the oily wastewater discharged by industry is increasing day by day, and frequent oil spill accidents have caused catastrophic damage to our daily life, natural environment and people's health. Therefore, it is imminent to develop effective oil-water separation methods. Traditional oil-water separation technologies, such as centrifugation, air flotation, adsorption, flocculation, etc., often have disadvantages such as low separation efficiency, complicated operating equipment, and high energy consumption. In recent years, membrane separation technology has become one of the most effective methods for oily wastewater treatment due to its advantages of high efficiency, energy saving, continuou...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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IPC IPC(8): D06N3/04D06N3/00B01J13/00
CPCD06N3/04D06N3/0088D06N3/0015B01J13/0065D06N2209/146D06N2209/141
Inventor 林绍建兰建武
Owner SICHUAN UNIV