聚硅氮烷作为一种新型发泡剂用于制备高强度、低密度环氧泡沫。

Polysilazane as a new foaming agent to prepare high-strength, low-density epoxy foam.

作者信息

Chang Yucheng, Luo Yongming, Xu Caihong, Zhao Jianling

机构信息

School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China.

Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.

出版信息

R Soc Open Sci. 2019 May 1;6(5):182119. doi: 10.1098/rsos.182119. eCollection 2019 May.

DOI:10.1098/rsos.182119

PMID:31218037

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6549989/

Abstract

Polysilazane (PSN2) was used as chemical foaming agent to prepare epoxy foam for the first time. Using the new foaming agent, epoxy foams with high strength and low density were successfully prepared. The density of epoxy foam can be tuned from 0.321 to 0.151 g cm by changing the content of PSN2 from 2.50 to 7.50 wt%, with the compressive strength varied from 7.39 to 1.25 MPa. The morphology, porosity, mechanical property, thermal conductivity and adhesive property of foams with different polysilazane content were investigated. Besides, the effect of polyamine curing agent and surfactant on foams was also investigated to optimize the as-prepared epoxy foam.

摘要

首次使用聚硅氮烷（PSN2）作为化学发泡剂制备环氧泡沫。使用这种新型发泡剂，成功制备出了高强度、低密度的环氧泡沫。通过将PSN2的含量从2.50 wt% 改变到7.50 wt%，环氧泡沫的密度可从0.321 g/cm³ 调整到0.151 g/cm³，抗压强度从7.39 MPa 变化到1.25 MPa。研究了不同聚硅氮烷含量泡沫的形态、孔隙率、力学性能、热导率和粘附性能。此外，还研究了多胺固化剂和表面活性剂对泡沫的影响，以优化所制备的环氧泡沫。