Method for synthesizing chitosan cross-linked polymaleic anhydride super absorbent resin

A technology of polymaleic anhydride and superabsorbent resin, which is applied in the field of polymer materials, can solve the problems that the performance of superabsorbent resin cannot meet people's requirements, and achieve the effect of good water absorption

Inactive Publication Date: 2015-04-29
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the continuous improvement of living standards, people's performance requirements for superabsorbent resins continue to increase, and the performance of ordinary superabsorbent resins will not meet people's requirements. This requires people to design and synthesize higher performance superabsorbent resins. It is used in certain circumstances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of synthetic method of chitosan crosslinked polymaleic anhydride superabsorbent resin, described method comprises the following steps:

[0019] (1) Take 10 parts of chitosan in a single-necked flask, add 50 parts of deionized water and 1 part of acetic acid, stir to dissolve the chitosan completely, then add 10 parts of maleic anhydride in acetone solution drop by drop, and continue at room temperature Stir the reaction for 5 h, precipitate the cross-linking agent N-maleoylated chitosan with acetone, and dry it in a vacuum oven at 40°C to a constant weight to obtain the cross-linking agent N-maleoylated chitosan sugar;

[0020] (2) Weigh 1 part of the above-mentioned N-maleoylated chitosan in a beaker, add deionized water, stir until the crosslinking agent is completely dissolved, add 2000 parts of acrylic acid to the beaker, mix well, and use sodium hydroxide The solution neutralizes part of the acrylic acid;

[0021] (3) Then add 100 parts of maleic anhydride...

Embodiment 2

[0026] A kind of synthetic method of chitosan crosslinked polymaleic anhydride superabsorbent resin, described method comprises the following steps:

[0027] (1) Take 100 parts of chitosan in a single-necked flask, add 200 parts of deionized water and 5 parts of acetic acid, stir to dissolve the chitosan completely, then add 100 parts of maleic anhydride in acetone solution drop by drop, and continue at room temperature Stir the reaction for 10 h, precipitate the cross-linking agent N-maleoylated chitosan with acetone, and dry it in a vacuum oven at 40°C to a constant weight to obtain the cross-linking agent N-maleoylated chitosan sugar;

[0028] (2) Weigh 5 parts of the above-mentioned N-maleoylated chitosan in a beaker, add deionized water, stir until the crosslinking agent is completely dissolved, add 10000 parts of acrylic acid to the beaker, mix well, and use sodium hydroxide The solution neutralizes part of the acrylic acid;

[0029] (3) Then add 100 parts of maleic an...

Embodiment 3

[0034] A kind of synthetic method of chitosan crosslinked polymaleic anhydride superabsorbent resin, described method comprises the following steps:

[0035] (1) Take 80 parts of chitosan in a single-necked flask, add 150 parts of deionized water and 3 parts of acetic acid, stir to dissolve the chitosan completely, then add 80 parts of maleic anhydride in acetone solution drop by drop, continue at room temperature Stir the reaction for 8 hours, precipitate the cross-linking agent N-maleoylated chitosan with acetone, and fully dry it in a vacuum oven at 40°C to constant weight to obtain the cross-linking agent N-maleoylated chitosan ;

[0036] (2) Weigh 3 parts of the above-mentioned N-maleoylated chitosan in a beaker, add deionized water, stir until the crosslinking agent is completely dissolved, add 8000 parts of acrylic acid to the beaker, mix well, and use sodium hydroxide The solution neutralizes part of the acrylic acid;

[0037] (3) Then add 300 parts of maleic anhydri...

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Abstract

The invention discloses a method for synthesizing chitosan cross-linked polymaleic anhydride super absorbent resin. The method is as follows: biodegradable N-maleoyl chitosan is used as a cross-linking agent, maleic anhydride (MA) and acrylic acid (AA) are used as raw materials, and ammonium persulfate and sodium bisulfite are used as initiating agents; an aqueous solution free radical polymerization reaction is performed to synthesize the biodegradable super absorbent resin; an orthogonal experiment method is used to optimize the synthesis conditions to obtain optimum synthesis conditions. The chitosan cross-linked polymaleic anhydride super absorbent resin prepared using the method provided by the invention is good in water absorption, swelling dynamic performance, water retention capability under natural conditions, repeated water absorption, pH sensitivity and biodegradability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a synthesis method of chitosan cross-linked polymaleic anhydride superabsorbent resin. Background technique [0002] Superabsorbent resin (SAP) is a new type of functional polymer material that appeared in the 1960s with excellent water absorption and water retention and a micro-crosslinked three-dimensional network structure. Because it contains a large number of strong hydrophilic groups (such as hydroxyl groups, carboxyl groups, etc.), it has the molecular expansion properties of polymer electrolytes. At the same time, due to its unique micro-crosslinked three-dimensional network structure, it can hinder the further expansion of molecules. , so that the resin only swells but does not dissolve in water. It absorbs water equivalent to hundreds or thousands of times its own weight to form a gel-like substance, and the absorbed water will not leak out when a certain p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/10C08F220/06C08F222/06C08B37/08
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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