Polylactic acid composition and preparation method thereof

A technology of polylactic acid and its composition, which is applied in the field of polymer material processing and preparation, can solve the problems of easy agglomeration, difficulty in uniform dispersion, low interfacial bonding strength, difficulties in research and application, etc., and achieve good hydrophilicity, excellent mechanical properties, broaden the The effect of using range

Active Publication Date: 2019-05-21
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristics of easy agglomeration, surface hydrophobicity and chemical inertness of nano-carbon materials lead to poor compatibility between nano-carbon materials and polymer matrix, low interface bonding strength with polymer matrix, and easy agglomeration in polymer matrix. It is difficult to disperse uniformly, which brings great difficulties to the further research and application of polymer-based nano-carbon composites

Method used

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  • Polylactic acid composition and preparation method thereof
  • Polylactic acid composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Dry 100 parts (mass parts, the same below) of poly-L-lactic acid, 1 part of reduced graphene oxide / organic salt microsphere composite powder, and 0.02 part of carbodiimide anti-hydrolysis agent UN-150 in a Hack torque The polylactic acid composition was prepared by high temperature melt blending in a rheometer.

[0050] Torque rheometer processing conditions: working temperature 180°C, rotating speed 60rpm, mixing for 10min until the mixing torque is balanced.

[0051] Wherein, the preparation method of the reduced graphene oxide / organic salt microsphere composite powder is as follows:

[0052] 1. Add 16.37g (0.215mol) 1,3-propanediol, 18.93g (0.210mol) 1,4-butanediol, 7.00g ( 0.035mol) PEG-200, 5.37g (0.040mol) dipropylene glycol and 19.49g (0.165mol) succinic acid, 33.38g (0.165mol) sebacic acid, 17.57g (0.135mol) itaconic acid, 15.67g (0.135mol) fumaric acid, then add 66.9mg antioxidant 1010, 66.9mg antioxidant 168 and 133.8mg hydroquinone, stir and heat up to 170°...

Embodiment 2

[0060] 100 parts of dry poly-L-lactic acid, 2 parts of reduced graphene oxide / organic salt microsphere composite powder, and 0.04 part of carbodiimide anti-hydrolysis agent UN-150 were melted together in a Haake torque rheometer at high temperature. The polylactic acid composition was prepared in a mixed manner.

[0061] Torque rheometer processing conditions: working temperature 180°C, rotating speed 60rpm, mixing for 10min until the mixing torque is balanced.

Embodiment 3

[0063] 100 parts of dry poly-L-lactic acid, 4 parts of reduced graphene oxide / organic salt microsphere composite powder, and 0.08 part of carbodiimide anti-hydrolysis agent UN-150 were co-melted at high temperature in a Haake torque rheometer. The polylactic acid composition was prepared in a mixed manner.

[0064] Torque rheometer processing conditions: working temperature 180°C, rotating speed 60rpm, mixing for 10min until the mixing torque is balanced.

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Abstract

The invention belongs to the technical field of processing and preparation of a macromolecular material and particularly relates to a polylactic acid composition and a preparation method thereof. Thepolylactic acid composition comprises the following components in parts by weight: 100 parts of polylactic acid, 1 to 15 parts of reduced nanometer carbon oxide material/organic salt microsphere composite powder and 0.02 to 0.30 part of a hydrolysis-resistant agent. The reduced nanometer carbon oxide material/organic salt microsphere composite powder has high compatibility with the polylactic acid, so that the reduced nanometer carbon oxide material is dispersed in the polylactic acid well, the mechanical property of the polylactic acid is improved, and the crystallization property, the processing property, the biodegradability, the heat stability and the like are effectively improved; meanwhile, high electricity-conducing and heat-conducting properties are achieved and the application range of the polylactic acid is enlarged. In the polylactic acid composition prepared by the method, the preparation process is simple and the operation process is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of polymer material processing and preparation, and in particular relates to a polylactic acid composition and a preparation method thereof. Background technique [0002] Polylactic acid is a kind of lactic acid polyester in the form of ester bonds, which is made from starch and sugar extracted from plants as raw materials, which are fermented by microorganisms and then chemically reacted. Polylactic acid has excellent biocompatibility and absorbability, is non-toxic and non-irritating, and can be completely decomposed into water and carbon dioxide under the action of microorganisms, water, acid, alkali, etc., and has no pollution to the environment. It can be applied to the fields of packaging materials, biomedicine, automobiles and electronics, etc. However, the shortcomings of polylactic acid materials such as high brittleness, slow crystallization rate and poor thermal stability have limited its wide ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/06C08K3/04C08K5/29C08F283/01C08F222/14C08F2/46C08G63/676
Inventor 王庆国黎永轩王兆山王童瑶
Owner QINGDAO UNIV OF SCI & TECH
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