Impact-resistant, heat-resistant and antibacterial polylactic acid composition and preparation method thereof

A polylactic acid and impact-resistant technology, which is applied in the field of polymer material modification, can solve the problems of high brittleness, poor heat resistance, and poor light resistance of PLA materials, and achieve good compatibility, improved brittleness, and improved heat resistance.

Inactive Publication Date: 2019-04-16
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But up to now, PLA materials are still facing technical problems such as high brittleness, poor heat resistance, easy to grow bacteria, poor light resistance, etc., and its applicability is greatly limited.

Method used

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  • Impact-resistant, heat-resistant and antibacterial polylactic acid composition and preparation method thereof
  • Impact-resistant, heat-resistant and antibacterial polylactic acid composition and preparation method thereof
  • Impact-resistant, heat-resistant and antibacterial polylactic acid composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0035] Embodiment 1~3: adopt PLA as base material, by adding a small amount of TPU or TPEE as impact-resistant resin, adding glass fiber and organic montmorillonite as heat-resistant filler, adding nano-titanium dioxide and silver ion exchanger compound as antibacterial agent, 770 and UV326 are added as light stabilizers, and other components are detailed in the example data in Table 2. From the test results of Examples 1 to 3 in Table 3, it can be found that the prepared polylactic acid composition material has significantly improved IZOD notched impact strength and heat distortion temperature, and its antibacterial performance can reach Class I. Xenon lamp / ultraviolet lamp There is no yellowing phenomenon in aging, and it has the characteristics of impact resistance, heat resistance, antibacterial and light aging resistance.

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Abstract

The invention discloses an impact-resistant, heat-resistant and antibacterial polylactic acid composition and a preparation method thereof. The impact-resistant, heat-resistant and antibacterial polylactic acid composition adopts PLA resin as a basic material and is prepared by adding impact-resistant resin, a heat-resistant filler, an antibacterial agent, a coupling agent, a lubricant, a light stabilizer and an antioxidant and using a double-screw extruder for melting and blending the materials above. The PLA composition not only has the advantages of great shock resistance, heat resistance,bacterial resistance and light aging resistance but also is easy for extrusion and injection molding, and the biodegradable characteristics of the PLA composition are basically maintained.

Description

technical field [0001] The invention relates to a preparation method of a polylactic acid composition, in particular to an impact-resistant, heat-resistant and antibacterial polylactic acid composition and a preparation method thereof, belonging to the field of polymer material modification. Background technique [0002] With the continuous enhancement of human awareness of environmental protection, the problem of "white pollution" of polymer materials has been increasingly challenged. Polylactic acid (PLA) is made from starch raw materials extracted from renewable plant resources (such as corn, cassava, etc.). It is a new type of bio-based degradable material. Pollution, the product can be biodegraded in nature and does not pollute the environment. It is a green and environment-friendly polymer material in line with sustainable development, and its application value has attracted more and more attention. But so far, PLA materials still face technical problems such as high ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L75/06C08L101/00C08L83/04C08K13/06C08K9/04C08K3/34C08K7/14
CPCC08L67/04C08L2201/08C08L2205/03C08L2205/035C08L2207/04C08L75/06C08L83/04C08K13/06C08K9/04C08K3/34C08K7/14C08L101/00
Inventor 王立春朱军颜婷婷张瑜张伟孙青缪爱东
Owner NANTONG UNIVERSITY
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