ZHANG Jiawen， LIU Junhuai， HE Hui， LIU Yi， HE Yuqin， ZHANG Hong， WU Qingding

(Research Institute of Material Forming Technology， Central South University of Forestry and Technology， Changsha 410004， China)

Abstract: In order to expand the high-value clean utilization of ramie resources, the ramie bone-based composite materials were prepared by warm pressing method with ramie bone powder as base material, as well as nano-copper oxide and epoxy resin powder as strengthening factors. The forming process parameters and strengthening factors were optimized by response surface design method. With the help of cone calorimeter and scanning electron microscope, flame retardant and smoke suppressive characteristics of ramie bone-based composites were studied. The results show that the optimal process parameters and strengthening factors of ramie bone-based composites are as follows: forming temperature is 180 ℃, forming pressure is 70 MPa, holding time of heat preservation and pressure is 30 min, mass fraction of epoxy resin is 9.2%, mass fraction of nano-copper oxide is 30.8%. Ramie bone-based composite materials have the ability to delay ignition, slow flame diffusion, inhibit combustion heat release,and inhibit smoke release. The structure of the residual carbon layer is compact and compact, which can effectively restrain the bursting of the carbon layer.

Keywords: ramie bone-based composite; flame retardant and smoke suppression characteristics; response surface test design method; process parameter; strengthening factor

中图分类号：TB44

文献标志码：A

文章编号：1008-5548(2021)04-0027-09

DOI:10.13732/j.issn.1008-5548.2021.04.004

收稿日期： 2020-12-15， 修回日期：2021-04-03，在线出版时间：2021-06-03 14:21。

基金项目：湖南省重点领域研发计划项目，编号：2019GK2244；湖南省自然科学基金/常德市联合基金项目，编号：2020JJ6065。

第一作者简介：张嘉文(1995—)，女，硕士研究生，研究方向为新型生物质建材。E-mail: 576792476@qq.com。

通信作者简介：吴庆定(1963—)，男，博士，教授，博士生导师，研究方向为生物质材料成形理论与技术。E-mail: wudingle@126.com。