Unlock instant, AI-driven research and patent intelligence for your innovation.

Production of easily biological-degradable built-up starch-base high water-absorption resin

A technology of superabsorbent resin and compound starch, which is applied in the field of polymer composite materials, can solve the problems of non-degradable, high production cost, difficult biodegradation, etc., and achieve the effect of low price, low cost and good safety

Inactive Publication Date: 2008-12-31
JIANGNAN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemically synthesized superabsorbent resin has good water absorption rate and use effect, but there are also some defects as follows: 1. The rise in oil prices has led to a sharp increase in production costs, and the current price per ton is 30,000-50,000 yuan; 2. Biodegradation is relatively difficult, and the superabsorbent resin cannot be degraded in the environment for a long time after being discarded

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The quality index of cross-linked carboxymethyl starch: carboxymethyl substitution degree is 0.6, cross-linking degree is 0.1 cross-linking group per 100 glucose units; acrylonitrile——2-acrylamide-2-methylpropanesulfonate The quality index of the acid-grafted co-polymerized starch is: the mass percentage content of acrylonitrile is 25%, the percentage content of 2-acrylamide-2-methylpropanesulfonic acid is 5%, and the percentage content of starch is 70%;

[0020] The mass ratio of cross-linked carboxymethyl starch and acrylonitrile-2-acrylamide-2-methylpropanesulfonic acid grafted copolymerized starch is 90:10, and they are fully mixed;

[0021] Gelatinization: gelatinization in a kneader, gelatinization temperature 80°C, time 40min;

[0022] Tablet production: Tablet production is carried out in a drum dryer with a temperature of 120°C and a time of 10 minutes; crushing and screening: crushing with a low-speed auger to make it into a certain size of flakes; then use 18...

Embodiment 2

[0025] The quality index of cross-linked carboxymethyl starch: the degree of carboxymethyl substitution is 0.1, and the degree of cross-linking is 1.8 cross-linking groups per 100 glucose units; propylene——2-acrylamide-2-methylpropanesulfonic acid The quality index of the grafted co-polymerized starch is: the mass percentage content of acrylonitrile is 40%, the percentage content of 2-acrylamide-2-methylpropanesulfonic acid is 8%, and the percentage content of starch is 52%;

[0026] The mass ratio of cross-linked carboxymethyl starch and acrylonitrile-2-acrylamide-2-methylpropanesulfonic acid grafted copolymerized starch is 99:1, and they are fully mixed;

[0027] Gelatinization: gelatinization in a kneader, gelatinization temperature 120°C, time 20min;

[0028] Tablet production: Tablet production is carried out in a drum dryer at a temperature of 160°C for 3 minutes; crushing and sieving: crushing with a low-speed auger to make it into a certain size of flakes; then success...

Embodiment 3

[0031] The quality index of cross-linked carboxymethyl starch: the degree of carboxymethyl substitution is 0.3, the degree of cross-linking is 1.0 cross-linking groups per 100 glucose units; the mass percentage of acrylonitrile is 75%, 2-acrylamide-2 - The percentage content of methylpropanesulfonic acid is 10%, and the percentage content of starch is 15%;

[0032] The quality index of acrylonitrile-2-acrylamide-2-methylpropanesulfonic acid grafted copolymerized starch is:

[0033] The mass ratio of cross-linked carboxymethyl starch and acrylonitrile-2-acrylamide-2-methylpropanesulfonic acid grafted copolymerized starch is 95:5, and they are fully mixed;

[0034] Gelatinization: gelatinization in a kneader, gelatinization temperature 100°C, time 30min;

[0035] Tablet production: Tablet production is carried out in a drum dryer at a temperature of 140°C for 6 minutes; crushing and sieving: crushing with a low-speed auger to make it into a certain size of flakes; then successi...

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
Login to View More

PUM

No PUM Login to View More

Abstract

Production of easily-biological degradable and complex formulating starch base high-water absorption resin of is carried out by taking cross-linked carboxymethyl starch and acrylonitrile-2-acrylamide-2-methyl propyl sulfonic acid grafted copolymerized starch to complex formulating, mixing proportionally, gelatinizing, pelletizing, crushing and screening to obtain the final product. It has high water absorption and safety. Its distilled water-absorption multiplying factor is 300-800 and normal saline absorption multiplying factor is 20-60.

Description

technical field [0001] The invention discloses a preparation method of an easily biodegradable composite starch-based superabsorbent resin, which belongs to the technical field of polymer composite materials. Background technique [0002] Superabsorbent resin refers to a polymer substance with particularly strong water absorption performance. Its water absorption capacity is dozens or even thousands of times its own mass, and its ability to absorb normal saline is generally several to dozens of times its own mass. Superabsorbent resins have been researched since around 1950 and put into industrial production around 1960. There are many types of superabsorbent resins, mainly including starch-based, cellulose-based, protein-based, chemically synthesized and various composite-based superabsorbent resins. [0003] The development and research of starch-based superabsorbent resin has a history of several decades. In 1961, C.R. Russell of the Northern Research Institute of the Un...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/04C08L51/02
Inventor 童群义
Owner JIANGNAN UNIV