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Carbon dioxide-based polylactic acid copolymer modified cellulose material and preparation method thereof

A technology of copolymer modification and carbon dioxide, which is applied in the production of bulk chemicals, can solve the problems of poor mechanical properties of polylactic acid copolymers, and achieve the effects of good physical and chemical properties, low price and good compatibility.

Active Publication Date: 2022-05-10
欧尚元(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for preparing a carbon dioxide-based polylactic acid copolymer modified cellulose material to solve the problem of poor mechanical properties of polylactic acid copolymers in the prior art

Method used

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  • Carbon dioxide-based polylactic acid copolymer modified cellulose material and preparation method thereof
  • Carbon dioxide-based polylactic acid copolymer modified cellulose material and preparation method thereof
  • Carbon dioxide-based polylactic acid copolymer modified cellulose material and preparation method thereof

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Embodiment 1

[0034] The preparation method of the carbon dioxide-based polylactic acid copolymer modified cellulose material of the present embodiment comprises the following steps:

[0035] (1) Take 0.1mol of carbon dioxide-based polypropylene carbonate, 0.1mol of oxalic acid, 0.1mol of L-lactic acid, add 0.001mol of stannous octoate as a catalyst, and perform the following polycondensation reaction:

[0036]

[0037] (I)

[0038] The reaction temperature of the polycondensation reaction is 50°C, the reaction time is 48h, and the vacuum degree is 0.085MPa; it obtains the polycondensate shown in formula (I), wherein, x=0.1; y=0.1; z=0.1; n The value range is 10~30.

[0039] The carbon dioxide-based polypropylene carbonate is produced by the copolymerization of propylene oxide and carbon dioxide, its average molecular weight is 2000, and the terminal group is a hydroxyl group;

[0040] (2) Carry out the following substitution reaction between the polycondensate represented by formula (...

Embodiment 2

[0047] The preparation method of the carbon dioxide-based polylactic acid copolymer modified cellulose material of the present embodiment comprises the following steps:

[0048] (1) Take 0.1mol of carbon dioxide-based polypropylene carbonate, 0.1mol of oxalic acid, 0.2mol of L-lactic acid, add 0.001mol of stannous octoate as a catalyst, and perform the following polycondensation reaction:

[0049]

[0050] (I)

[0051] The reaction temperature of the polycondensation reaction is 150°C, the reaction time is 3h, and the vacuum degree is 0.095MPa; it obtains the polycondensate shown in formula (I), wherein, x=0.1; y=0.1; z=0.2; n The value range is 10~30.

[0052] The carbon dioxide-based polypropylene carbonate is produced by the copolymerization of propylene oxide and carbon dioxide, its average molecular weight is 2000, and the terminal group is a hydroxyl group;

[0053] (2) Carry out the following substitution reaction between the polycondensate represented by formula (...

Embodiment 3

[0060] The preparation method of the carbon dioxide-based polylactic acid copolymer modified cellulose material of the present embodiment comprises the following steps:

[0061] (1) Take 0.1mol of carbon dioxide-based polypropylene carbonate, 0.1mol of oxalic acid, 0.3mol of L-lactic acid, add 0.001mol of stannous octoate as a catalyst, and perform the following polycondensation reaction:

[0062]

[0063] (I)

[0064] The reaction temperature of the polycondensation reaction is 100°C, the reaction time is 25h, and the vacuum degree is 0.085MPa; it obtains the polycondensate shown in formula (I), wherein, x=0.1; y=0.1; z=0.3; n The value range is 10~30.

[0065] The carbon dioxide-based polypropylene carbonate is produced by the copolymerization of propylene oxide and carbon dioxide, its average molecular weight is 2000, and the terminal group is a hydroxyl group;

[0066] (2) Carry out the following substitution reaction between the polycondensate represented by formula ...

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Abstract

The invention provides a carbon dioxide-based polylactic acid copolymer modified cellulose material and a preparation method thereof, and the preparation method comprises the following steps: taking carbon dioxide-based polypropylene carbonate, oxalic acid and lactic acid, and carrying out condensation polymerization to obtain a condensation polymer; carrying out substitution reaction on the polycondensate and ethyl phosphoryl dichloride to obtain a substitute; reacting the substitute with cellulose to obtain a modified cellulose product; and finally, blending the obtained modified cellulose product with polylactic acid to obtain the carbon dioxide-based polylactic acid copolymer modified cellulose material. According to the preparation method of the carbon dioxide-based polylactic acid copolymer modified cellulose material, the obtained material has good physical and chemical properties, mechanical properties and biodegradability.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a carbon dioxide-based polylactic acid copolymer modified cellulose material and a preparation method thereof. Background technique [0002] Polylactic acid (abbreviated as PLA) is a popular biodegradable aliphatic polyester, which is polymerized from small molecule lactic acid produced by microbial fermentation of biomass raw materials. It is biodegradable, renewable, and biocompatible. Good performance, high mechanical strength, high melting temperature and easy processing. The final decomposition products of PLA in nature are carbon dioxide and water, which has no pollution to the ecological environment and is a green and environmentally friendly polymer. [0003] Based on the above inherent advantages, PLA has been widely used in the fields of industry, medicine, construction, transportation, agriculture, electronics, automobiles, and environmental protection mater...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L87/00C08G63/64C08G63/91C08G81/00C08G63/85
CPCC08L67/04C08G63/64C08G63/91C08G63/85C08G81/00C08L87/00Y02P20/54
Inventor 张天惕
Owner 欧尚元(天津)有限公司