Effect of nano-montmorillonite on foaming properties of wood flour/polypropylene composites

被引：0

作者：

Xu A. ^{[1
]}

Song Y. ^{[1
]}

机构：

[1] Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 08期

关键词：

Microcellular foaming; Nano-montmorillonite; Polypropylene; SupercriticalCO[!sub]2[!/sub; Wood-plastic composites;

D O I：

10.13801/j.cnki.fhclxb.20201111.002

中图分类号：

学科分类号：

摘要：

The foamed wood flour-nano-montmorillonite (NMMT)/polypropylene (PP) composites were prepared by the batch foaming method using supercritical CO2 microcellular foaming technology. Effects of NMMT on the microcellular structure and mechanical properties of the composites were explored by investigating crystallization behavior, rheological properties, cell morphology and compression properties. The results show that NMMT accelerates the crystallization rate of the PP matrix in the wood flour/PP composites, and reduces the crystallinity rate. This is beneficial to the formation of foamed homogeneous system and cell growth. The PP molecular chain is inhibited by the NMMT interlayer, resulting in the melt elasticity increasement of the wood flour/PP composites. The phenomena of cell coalescence and collapse are reduced, the average cell diameter of the foamed composites is decreased from 30.4 μm to 20.3 μm, and the uniformity of cell size is obviously improved. The compressive strength and modulus are increased by 187% and 223%, respectively. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：2497 / 2504

页数：7

共 30 条

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