Supercritical fluid injection foaming polylactide foam material and preparation method therefor

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United States of America Patent

PATENT NO 12202179
APP PUB NO 20230054285A1
SERIAL NO

17795538

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Abstract

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The present application relates to a supercritical fluid injection foaming polylactide foam material and a preparation method therefor. The method includes: first obtaining a surface-modified cellulose nanofiber aqueous solution; then melting and blending the cellulose nanofiber aqueous solution and a polylactide twice; passing same through extrusion, cooling under water, and granulation so as to obtain a polylactide/cellulose nanofiber composite material; then plasticizing and melting the polylactide/cellulose nanofiber composite material in a microporous foaming injection molding machine; uniformly mixing same with a supercritical fluid foaming agent in the injection molding machine; injecting same into a mold cavity; and subjecting the resultant to post-treatment so as to obtain a polylactide foam material. The polylactide foam material has a sandwich structure, in which two outer surface layers are solid layers that do not contain any foam, and the sandwiched layer is a foam layer having a cellular structure.

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Patent Owner(s)

Patent OwnerAddress
NINGBO INSTITUTE OF MATERIALS TECHNOLOGY AND ENGINEERING CHINESE ACADEMY OF SCIENCESNO 519 ZHUANGSHI ROAD ZHENHAI DISTRICT NINGBO ZHEJIANG 315200

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Luo, Haibin Ningbo, CN 7 10
Ren, Qian Ningbo, CN 7 20
Wang, Long Ningbo, CN 293 1389
Wu, Fei Ningbo, CN 179 1254
Wu, Minghui Ningbo, CN 12 513
Zhang, Lihua Ningbo, CN 49 182
Zheng, Wenge Ningbo, CN 1 1

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