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Hydrophilic membrane and preparation method thereof

A hydrophilic film and hydrophilic technology, applied in the direction of coating, etc., can solve the problems of toxic shock syndrome, skin allergic reaction, unsatisfactory water retention rate, etc., and achieve the effect of high water absorption performance

Pending Publication Date: 2021-04-30
NINGBO SOKEN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But for SAP, firstly, the water retention rate of these materials is not ideal, and it dries quickly after absorbing water, which is not suitable for mask products; secondly, these materials are synthesized by chemical methods using polymer resins, which are easy to cause skin irritation. Allergic reactions, SAP can also produce health problems such as toxic shock syndrome; third, these materials are not biodegradable, under ideal conditions, it takes 100 years for a mask to degrade, and 500 years for diapers to degrade

Method used

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  • Hydrophilic membrane and preparation method thereof
  • Hydrophilic membrane and preparation method thereof
  • Hydrophilic membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation method of modified starch resin: Add 30 parts of glutinous rice starch into a three-necked flask with a stirrer, then add distilled water and stir at 60°C for gelatinization; cool to room temperature, and then add 20 parts of acrylic acid to the gelatinized starch Resin, 30 parts of isopropanol, 0.5 parts of 2,4-dihydroxybenzophenone and 20 parts of 7% NaOH solution are mixed evenly and placed under a 1200W ultraviolet lamp for polymerization. The temperature is controlled at 20-30°C and filtered Then dry in an oven at 85°C for 12 hours, and pulverize the obtained material to obtain the desired modified starch resin;

[0036] (2) Preparation method of hydrophilic fiber film: Mix 40 parts of modified starch resin, 20 parts of polyglycolic acid, and 1 part of cyanoguanidine evenly, and then melt, extrude, blown film and solidify at 240°C to obtain the desired hydrophilic Fiber membrane;

[0037] (3) Preparation method of hydrophilic coating: add 20 parts ...

Embodiment 2

[0040] (1) Preparation method of modified starch resin: Add 50 parts of glutinous rice starch into a three-necked flask with a stirrer, then add distilled water and stir at 60°C for gelatinization; cool to room temperature, then add 30 parts of acrylic acid to the gelatinized starch Resin, 30 parts of isopropanol, 1 part of 2,4-dihydroxybenzophenone and 20 parts of 7% NaOH solution are mixed evenly and placed under a 1200W ultraviolet lamp for polymerization, the temperature is controlled at 20-30 ° C, filtered Then dry in an oven at 85°C for 12 hours, and pulverize the obtained material to obtain the desired modified starch resin;

[0041] (2) Preparation method of hydrophilic fiber film: Mix 50 parts of modified starch resin, 30 parts of polyglycolic acid, and 4 parts of cyanoguanidine, and then melt, extrude, blown film and solidify at 240°C to obtain the desired hydrophilic Fiber membrane;

[0042] (3) Preparation method of hydrophilic coating: add 30 parts of PVA to 30 p...

Embodiment 3

[0045] (1) Preparation method of modified starch resin: Add 40 parts of glutinous rice starch into a three-necked flask with a stirrer, then add distilled water and stir at 60°C for gelatinization; cool to room temperature, and then add 25 parts of acrylic acid to the gelatinized starch Resin, 30 parts of isopropanol, 0.8 parts of 2,4-dihydroxybenzophenone and 20 parts of 7% NaOH solution are mixed evenly and placed under a 1200W ultraviolet lamp for polymerization, the temperature is controlled at 20-30 °C, and filtered Then dry in an oven at 85°C for 12 hours, and pulverize the obtained material to obtain the desired modified starch resin;

[0046] (2) Preparation method of hydrophilic fiber film: Mix 60 parts of modified starch resin, 25 parts of polyglycolic acid, and 2 parts of cyanoguanidine evenly, and then melt, extrude, blown film and solidify at 240°C to obtain the desired hydrophilic Fiber membrane;

[0047] (3) Preparation method of hydrophilic coating: Add 25 par...

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Abstract

The invention discloses a hydrophilic membrane. The hydrophilic membrane is characterized by comprising a hydrophilic fiber membrane and a hydrophilic coating, wherein the hydrophilic fiber membrane is coated with the hydrophilic coating; the hydrophilic fiber membrane is prepared from the following raw materials in parts by mass: 40 to 60 parts of modified starch resin, 20 to 30 parts of polyglycolic acid and 1 to 4 parts of cyanoguanidine; the modified starch resin comprises the following raw materials in parts by mass: 30-50 parts of glutinous rice starch, 20-30 parts of acrylic resin, 0.5-1 part of an initiator, 30 parts of a solvent and 20 parts of a NaOH solution; the hydrophilic coating comprises the following raw materials in parts by mass: 100 parts of an acrylic copolymer, 30-50 parts of deionized water and 20-30 parts of polyvinyl alcohol. The invention also discloses a preparation method of the hydrophilic membrane. Compared with the prior art, the hydrophilic membrane disclosed by the invention is safe, healthy, good in water absorption and water retention effects and degradable.

Description

technical field [0001] The invention relates to the technical field of hydrophilic materials, in particular to a hydrophilic membrane and a preparation method thereof. Background technique [0002] As we all know, at present, diapers, sanitary napkins, sanitary napkins and other hygiene products all use super absorbent resin (SAP) as absorbent. These substances can absorb several times their own mass of liquid, and on average each diaper can absorb 30 times its own mass of liquid, so they are widely used. [0003] For example, the patent application No. CN201710648872.2 (Notice No. CN109320660A) of the invention patent "A Production Process of Medicine and Superabsorbent Resin SAP" adopts the aqueous solution adiabatic polymerization method, uses deionized water as the flux, and partially neutralizes the acrylic acid with alkali, Add cured starch, cross-linking agent and composite initiator, carry out cross-linking polymerization at low temperature, and obtain SAP with a th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/056C08L3/02C08L33/04C08L67/04C08K5/315C09D133/04C09D7/65
CPCC08J7/056C08J7/0427C09D133/04C09D7/65C08L3/02C08J2303/02C08J2433/04C08J2467/04
Inventor 江健波纪照辉吴苗苗
Owner NINGBO SOKEN CHEM
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