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Natural macromolecular water absorbing material and preparation method thereof

A natural polymer and water-absorbing material technology, applied in the field of high-strength natural polymer water-absorbing materials, to achieve high safety and good water retention effects

Inactive Publication Date: 2016-04-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in existing water-absorbing materials using organic monomers as raw material components, and to provide a pure natural high-performance water-absorbing material prepared from seaweed products sodium alginate and Gracilaria polysaccharides and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soak 3 parts of Gracilaria in 10wt% NaOH solution at 85°C for 4 hours, wash with water until neutral, boil in water at 90°C for 3 hours, extract and filter to obtain Gracilaria polysaccharide, and the obtained Gracilaria polysaccharide is dried, After alcohol washing and crushing, pass through a 20-mesh sieve for later use. Dissolve 6 parts of sodium alginate in 95.5 parts of water, add Gracilaria polysaccharide, stir evenly, drop 10 parts of calcium chloride solution with a concentration of 10wt% into the gel with a syringe, the gel time is 0.05 hours, and then dry the product Obtain natural polymer water-absorbing materials. The weight of the water-absorbing material obtained by this method is 46 times of its own dry weight after absorbing water, and the weight after absorbing 0.9wt% normal saline is 31 times of its own dry weight. The tensile strength of the material after absorbing water is 0.13MPa, which has good Excellent water retention, the water retention can ...

Embodiment 2

[0022] Soak 0.2 parts of Gracilaria in 2wt% NaOH solution at 60°C for 8 hours, wash with water until neutral, boil in water at 80°C for 8 hours, extract and filter to obtain Gracilaria polysaccharides, and the obtained Gracilaria polysaccharides are dried, After alcohol washing and crushing, pass through a 20-mesh sieve for later use. Dissolve 0.2 parts of sodium alginate in 70 parts of water, add Gracilaria polysaccharide, stir evenly, drop 20 parts of calcium chloride solution with a concentration of 0.2wt% into the gel with a syringe, the gel time is 6 hours, and then dry the product Promptly get the natural polymer water-absorbing material. The weight of the water-absorbing material obtained by this method is 45 times of its own dry weight after absorbing water, and the weight after absorbing 0.9wt% physiological saline is 32.5 times of its own dry weight. The tensile strength of the material after absorbing water is 0.16MPa, which has good Excellent water retention, the ...

Embodiment 3

[0024] Soak 6 parts of Gracilaria in 20wt% NaOH solution at 70°C for 0.5 hours, wash with water until neutral, boil in water at 100°C for 1 hour, extract and filter to obtain Gracilaria polysaccharides, the obtained Gracilaria polysaccharides are dried, After alcohol washing and crushing, pass through a 20-mesh sieve for later use. Dissolve 3 parts of sodium alginate in 85 parts of water, add Gracilaria polysaccharide, stir evenly, drop 0.2 parts of 20wt% calcium chloride solution into the gel with a syringe, the gel time is 3 hours, and then dry the product Obtain natural polymer water-absorbing materials. The weight of the water-absorbing material obtained by this method is 46.5 times of its own dry weight after absorbing water, and the weight after absorbing 0.9wt% normal saline is 33 times of its own dry weight. The tensile strength of the material after absorbing water is 0.2MPa, which has good Excellent water retention, the water retention can reach 85% within half an h...

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Abstract

The invention discloses a natural macromolecular water absorbing material and a preparation method thereof. Natural macromolecular gracilaria polysaccharides and sodium alginate are used as main raw materials; the natural macromolecular water absorbing material has great safety to people, particularly infants; the water absorbing multiples reach tens to hundreds of multiples of the self weight and the tensile strength is great; the natural macromolecular water absorbing material has a good water-retaining performance and the product can be naturally degraded.

Description

technical field [0001] The invention belongs to the field of water-absorbing materials, in particular to a high-strength natural polymer water-absorbing material whose main components are Gracilaria polysaccharide and sodium alginate. Background technique [0002] Super absorbent material is a substance containing a large number of hydrophilic groups, which can absorb water tens to thousands of times its own weight. It is widely used in baby diapers, women's sanitary napkins, pet mats, gardening and other fields. It is a very meaningful research content. [0003] The water-absorbing materials developed in the past are mostly divided into two categories. One is to carry out graft reaction on natural polymers such as starch and cellulose, and add functional organic monomers to form super water-absorbing materials; the other is to use one or more Formed by polymerization of organic monomers. The safety of these two types of water-absorbing materials is restricted by the proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L5/00C08L5/04C08B37/00
CPCC08B37/0003C08J3/075C08L5/04C08L2205/02C08L5/00
Inventor 叶卓亮
Owner FUZHOU UNIV
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