TY - JOUR
T1 - Synergetic effect of O-POSS and T-POSS to enhance ablative resistant of phenolic-based silica fiber composites via strong interphase strength and ceramic formation
AU - Niu, Zhaoqi
AU - Li, Gang
AU - Ma, Xiaoyan
AU - Shen, Shuai
AU - Xin, Yi
AU - Cai, Lifeng
AU - Chen, Fang
AU - Zhang, Chengshuang
AU - Hou, Xiao
N1 - Publisher Copyright:
© 2022
PY - 2022/4
Y1 - 2022/4
N2 - As a typical ablative material, silica fiber reinforced phenolic resin composites are widely used in thermal protection system. However, its ablative properties and interfacial strength need to be further improved to meet the growing requirements of aerospace. In this work, reactive octaepoxycyclohexylethyl POSS (O-POSS) and tetrasilanoloctaphenyl POSS (T-POSS) were synthesized to modified high silica fiber cloth (HSC) and phenolic resin (PR) respectively. The flexural strength and interlaminar shear strength of modified HSC reinforced modified PR (PK-HSC/T-PR) composites are 213.1 and 22.4 MPa, 63.6% and 59.5%, higher than those of pristine HSC/PR composites, respectively. Meantime, the obtained PK-HSC/T-PR composites also exhibit lower thermal conductivity (0.2461 W⋅(m K)−1) and ablative rate (liner ablative rate: 0.128 mm/s, decreased by 22.4%). Furthermore, the mechanism of the two POSS synergetic effect for ablative performance enhancement was explored from both the aspects of matrix ceramization and interface structure evolution during ablation process.
AB - As a typical ablative material, silica fiber reinforced phenolic resin composites are widely used in thermal protection system. However, its ablative properties and interfacial strength need to be further improved to meet the growing requirements of aerospace. In this work, reactive octaepoxycyclohexylethyl POSS (O-POSS) and tetrasilanoloctaphenyl POSS (T-POSS) were synthesized to modified high silica fiber cloth (HSC) and phenolic resin (PR) respectively. The flexural strength and interlaminar shear strength of modified HSC reinforced modified PR (PK-HSC/T-PR) composites are 213.1 and 22.4 MPa, 63.6% and 59.5%, higher than those of pristine HSC/PR composites, respectively. Meantime, the obtained PK-HSC/T-PR composites also exhibit lower thermal conductivity (0.2461 W⋅(m K)−1) and ablative rate (liner ablative rate: 0.128 mm/s, decreased by 22.4%). Furthermore, the mechanism of the two POSS synergetic effect for ablative performance enhancement was explored from both the aspects of matrix ceramization and interface structure evolution during ablation process.
KW - A. Hybrid
KW - A. Polymer-matrix composites (PMCs)
KW - Ablation materials
KW - B. Interface/interphase
UR - http://www.scopus.com/inward/record.url?scp=85124232260&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2022.106855
DO - 10.1016/j.compositesa.2022.106855
M3 - 文章
AN - SCOPUS:85124232260
SN - 1359-835X
VL - 155
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 106855
ER -