Facile synthesis, mechanical toughening, low thermal conductivity and fire-retardant of lightweight quartz fiber reinforced polymer nanocomposites
Facile synthesis, mechanical toughening, low thermal conductivity and fire-retardant of lightweight quartz fiber reinforced polymer nanocomposites
复制标题
轻质石英纤维增强聚合物纳米复合材料的简便合成、机械增韧、低导热性和阻燃性
DOI：
10.1016/j.compscitech.2021.108836
复制
发表时间：
2021-04
影响因子：
9.1
通讯作者：
Xinghong Zhang
中科院分区：
文献类型：
--
作者：
Jianguo Xu;Changqing Hong;Jun Geng;Xiangyu Jin;Yiwu Pan;Hebing Wang;Xiaoguang Luo;Xinghong Zhang
迫切需要具有良好隔热性能和力学性能的轻质和纳米多孔复合材料来解决与应用相关的突出问题。合成此类材料的主要挑战是降低导热系数，提高其刚柔结合性能和耐热性。本文提出以针刺石英纤维毡(NQF)为增强体，以酚醛树脂气凝胶(PR)为基质，采用真空浸渍-凝胶聚合工艺制备完全轻质的3D块体复合材料。用酚醛树脂聚合诱导相分离法制备了纳米孔PR，纳米孔PR均匀填充并分散在NQF中，无宏观裂解和团聚现象。所制备的NQF/PR纳米复合材料具有较高的力学性能，其XY方向的压缩强度为1.76~2.84 Mpa，杨氏模量为26.71~39.60 Mpa。重要的是，当z向应变达到50%时，NQF/PR纳米复合材料没有受到破坏。与大多数有机基气凝胶和类气凝胶材料相比，目前的NQF/PR纳米复合气凝胶具有优异的阻燃性能和良好的隔热性能，其导热系数从0.017 W/m⋅K到0.031 W/m⋅K。实验结果表明，该方法合成的NQF/PR纳米复合材料非常适合于工业兼容和生产的高性能轻质绝缘材料的加热。
Lightweight and nanoporous composite materials with excellent thermal insulation and strong mechanical property are urgently required to address prominent issues that pertain to application. The main challenge of synthesizing such materials is to reduce the thermal conductivity and improve its rigid-flexible combined property as well as its heat resistance. Here, we propose to prepare a completely lightweight 3D bulk composites by vacuum impregnation and gel polymerization processing with a needled quartz fiber felt (NQF) as the reinforcement and phenolic resin aerogel (PR) as the matrix. The nanoporous PR is facilely synthesized by polymerization-induced phase separation with phenolic resin, and the resultant nanoporous PR is uniformly filled and distributed in NQF without macroscopic cracking and agglomeration. The as-prepared NQF/PR nanocomposites possessed enhanced mechanical property with compressive strength (1.76–2.84 MPa) and Young's modulus (26.71–39.60 MPa) in the xy direction. Importantly, the NQF/PR nanocomposite was not damaged as the strain reached 50% in z direction. Compared to most organic-based aerogel and aerogel-like materials, the present NQF/PR nanocomposite aerogels exhibited excellent flame resistances with 1000° C fire duration time exceeding 30 min and excellent thermal insulation properties with low thermal conductivities that varied from 0.017 W/m⋅ K to 0.031 W/m⋅ K. This experimental results show that the synthesized NQF/PR nanocomposites by this method are very suitable to heat high-performance lightweight insulation materials for industrial compatibly and production.
登录
查看更多内容
影响因子：
16.6
作者：
Yu, Zhi-Long;Yang, Ning;Yu, Shu-Hong
通讯作者：
Yu, Shu-Hong
纳米二氧化硅气凝胶绝热材料导热模型研究进展
影响因子：
6.4
作者：
He, Ya-Ling;Xie, Tao
通讯作者：
Xie, Tao
影响因子：
9.1
作者：
Xie Junbo-;Chen Xiaoming-;Zhang Yifan;G. Fang;Chen Li
通讯作者：
Xie Junbo-;Chen Xiaoming-;Zhang Yifan;G. Fang;Chen Li
影响因子：
5.9
作者：
Jiang, Haiyun;Wang, Jigang;Liu, Qilong
通讯作者：
Liu, Qilong
影响因子：
4.4
作者：
Rowe, Allison A.;Tajvidi, Mehdi;Gardner, Douglas J.
通讯作者：
Gardner, Douglas J.