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Process for preparing composite material of poly-aspartic acid, derivates thereof, chitosan and calcium phosphorous compound

A technology for polyaspartic acid and composite materials, which is applied in the field of preparing polyaspartic acid or its derivatives, composite materials of chitosan and calcium phosphorus compounds, can solve problems such as poor mechanical strength and improve mechanical strength. , easy chemical modification, good environmental compatibility

Inactive Publication Date: 2011-06-15
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the developed material has the disadvantage of poor mechanical strength

Method used

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  • Process for preparing composite material of poly-aspartic acid, derivates thereof, chitosan and calcium phosphorous compound
  • Process for preparing composite material of poly-aspartic acid, derivates thereof, chitosan and calcium phosphorous compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: In the process of preparing polyaspartic acid or its derivatives, chitosan and calcium-phosphorus compound composite materials, using organic solvent method to prepare polyaspartic acid and its derivatives containing at least one amino side chain , the method includes the following steps:

[0053] (1) Preparation of polyaspartic acid and derivatives thereof containing at least one amino side chain. The method is to react the polysuccinimide with a polyamine or its hydrochloride in an organic solvent such as dimethylformamide. The molar ratio of polyamine to polysuccinimide (calculated in terms of succinimide units) is 0.05-1.0:1, the reaction temperature is 20-100° C., and the reaction time is 1-10 hours. After the reaction is completed, add anhydrous methanol or anhydrous ethanol to precipitate the product, filter, and vacuum dry the filter cake at 40-60° C. for 4 hours to obtain a partially ring-opened polysuccinimide containing at least one amino side cha...

Embodiment 2

[0062]Example 2: In the process of preparing polyaspartic acid or its derivatives, chitosan and calcium phosphorus compound composite materials, using an aqueous medium method to prepare polyaspartic acid containing at least one amino side chain and its derivatives The method includes the following steps:

[0063] (1) An aqueous solution of polyaspartic acid and its derivatives containing at least one amino side chain is prepared. The method is to dissolve a polyamine containing at least two amine groups in an aqueous solution containing an alkali, and the molar ratio of the polyamine to the alkali is 1:9-9:1; The molar ratio of amine (calculated as succinimide unit): 0.05-1.0:1 mixing, the reaction temperature is 20-100 DEG C, and the reaction time is 0.1-10 hours.

[0064] The mixing mode of the above-mentioned polyamine and polysuccinimide can be that under stirring, the polyamine solution is added to the suspension slurry of polysuccinimide in water in whole, in batches, ...

Embodiment 3

[0073] Example 3: In the process of preparing polyaspartic acid or its derivatives, chitosan and calcium phosphorus compound composite materials, using an aqueous medium method to prepare polyaspartic acid and its derivatives containing at least one amino side chain The method includes the following steps:

[0074] (1) An aqueous solution of polyaspartic acid and its derivatives containing at least one amino side chain is prepared. The method is to mix an aqueous solution of a polyamine containing at least two amine groups, a hydrolyzing agent and / or an aminolysis agent with polysuccinimide, the reaction temperature is 20-100 DEG C, and the reaction time is 0.5-10 hours, so as to obtain a solution containing at least two amine groups. Polyaspartic acid and derivatives thereof with one amine side chain or aqueous solutions thereof. The molar ratio of the total moles of polyamine, hydrolyzing agent and aminolysis agent to polysuccinimide in terms of succinimide units is 1-5:1. ...

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Abstract

The invention discloses a method for preparing composite material of poly-aspartic acid or a derivative thereof, chitosan and a calcium-phosphate compound. The method is as follows: firstly, the poly-aspartic acid with different side chains or the derivative thereof is synthesized, then the poly-aspartic acid with different side chains or the derivative thereof, the chitosan and calcium-containing solution are mixed, reacted and precipitated under certain temperature and pH value. The obtained product has the characteristic of imitating a cell envelope and is environment-friendly biomimetic material. The material has the function of absorbing heavy metals and certain organic substances, can be used to remove the heavy metals, chlorohydrocarbon, organic pigment, dyes and so on, and is widely used for fields such as medicine industry, food engineering, printing and dyeing industry, sewage treatment and so on.

Description

【Technical field】 [0001] The invention relates to the field of fine chemicals of chemical engineering, in particular to a method for preparing a composite material of polyaspartic acid or its derivatives, chitosan and calcium phosphorus compounds. 【Background technique】 [0002] In previous work, we have developed a composite of polyaspartic acid or its derivatives and chitosan (see ZL200510015063.5 and CN 1916052A). But the developed material has the disadvantage of poor mechanical strength. For this reason, the present invention intends to incorporate inorganic materials therein to prepare composite materials of polyaspartic acid or its derivatives, chitosan and inorganic materials, so as to improve the mechanical strength of the materials. The whole preparation process adopts a clean chemical process, does not use toxic and harmful solvents, and the obtained material is an imitation cell wall membrane material, which has good biocompatibility and will not cause secondary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L5/08C08K5/07C08K3/22C08K3/24C08K3/28
Inventor 孙波方叶明王博威孙永跃吴新世安钢
Owner TIANJIN UNIVERSITY OF TECHNOLOGY