文献类型：期刊文献

英文题名：Co-Optimizing Insulative and Mechanical Properties of Quartz Fabric Reinforced Phenolic Composites by a Compromising Porous Structure for Thermal Insulation

作者：Qian, Zhen[1];Cai, Hongxiang[1];Wang, Peng[1];Li, Liang[1];Zhou, Xiaoyi[1];Cao, Yu[1];Zhang, Yayun[1];Niu, Bo[1];Long, Donghui[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Mat & Related Technol, Shanghai 200237, Peoples R China

年份：2023

卷号：62

期号：9

起止页码：3962

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20230913653529);WOS:【SCI-EXPANDED(收录号:WOS:000937111300001)】；

基金：This work was supported by the National Natural Science Foundation of China (nos. 22078100, 52102098, and22008073) and China Postdoctoral Science Foundation (2022M711140) .

语种：英文

外文关键词：Ablation - Compressive strength - Economic and social effects - Heat flux - Heat resistance - Oxidation resistance - Quartz - Silicon carbide - Tensile strength - Thermal conductivity - Thermal insulation

摘要：Introducing porosity into structures is recognized as a practical strategy to achieve lightweightness and insulation for ablatives, but reduced matrix density leads to the weakening of mechanical and anti-ablation performances. Herein, a trade-off design of the porous structure is developed for integrating high-strength, insulation, and anti-ablation abilities into mid density nanoporous phenolic composites (NPC). Benefiting from a narrow nanopore size (20-62 nm) of the matrix, thermal conductivity of NPC can be effectively limited within 0.079-0.115 W/(m center dot K), while showing a mid-density of 0.89-1.04 g/cm3. Meanwhile, NPC shows a considerable axial tensile strength of 130.2-177.8 MPa and out-of-plane compressive strength of 300 MPa due to the compromising porosity (34-62%) and reinforcing of the 3D needle-punched quartz fiber preform. Besides, NPC exhibits excellent oxidation resistance in static radiation heating (1000 degrees C) and outstanding insulation and ablation resistance under an oxy-acetylene heat flux of 1.76 and 4.18 MW/m2 with the linear ablation rates of 0.102 and 0.185 mm/s, respectively. The results will further promote the development and application of phenolic ablatives in extreme re-entry environments.