Low thermal-conductivity and high thermal stable silica aerogel based on MTMS/Water-glass co-precursor prepared by freeze drying

被引：107

作者：

Pan, Yuelei ^{[1
]}

He, Song ^{[1
]}

Gong, Lunlun ^{[1
]}

Cheng, Xudong ^{[1
]}

Li, Congcong ^{[1
]}

Li, Zhi ^{[1
]}

Liu, Zhong ^{[2
]}

Zhang, Heping ^{[1
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Anhui, Peoples R China

[2] ECONANO Beijing Tech Ltd, Beijing 100176, Peoples R China

来源：

MATERIALS & DESIGN | 2017年 / 113卷

关键词：

Silica aerogels; MTMS/Water-glass; Freeze drying; Hydrophobic; Thermal stability; SURFACE CHEMICAL-MODIFICATION; PHYSICAL-PROPERTIES; LOW-DENSITY; XEROGELS;

D O I：

10.1016/j.matdes.2016.09.083

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, hybrid silica aerogels were prepared by methltrimethoxysilane (MTMS) and water-glass co-precursor through two-step sol-gel process followed by freeze drying (FD). The characteristics of aerogels were strongly affected by the molar ratio of MTMS/Water-glass. When the molar ratio is 5.1, hybrid aerogel was obtained with good performances, such as low density (0.083 g/cm(3)), high contact angle (155.1 degrees) and low thermal conductivity (0.0226 W/m.K). The density, contact angle and thermal conductivity of aerogels based on co-precursor are still showing excellent thermal stability with the same performances after 550 degrees C heat-treatment. (C) 2016 Published by Elsevier Ltd.

引用

页码：246 / 253

页数：8

共 6 条

[1] Mechanical performance and thermal stability of glass fiber reinforced silica aerogel composites based on co-precursor method by freeze drying
Zhou, Ting
Cheng, Xudong
Pan, Yuelei
Li, Congcong
Gong, Lunlun
Zhang, Heping
APPLIED SURFACE SCIENCE, 2018, 437 : 321 - 328
[2] Spray freeze-dried monolithic silica aerogel based on water-glass with thermal superinsulating properties
Pan, Yuelei
Cheng, Xudong
Zhou, Ting
Gong, Lunlun
Zhang, Heping
MATERIALS LETTERS, 2018, 229 : 265 - 268
[3] Hydrophobic silica aerogel glass-fibre composite with higher strength and thermal insulation based on methyltrimethoxysilane (MTMS) precursor
Ul Haq, Ehsan
Zaidi, Syed Farrukh Alam
Zubair, Muhammad
Karim, Muhammad Ramzan Abdul
Padmanabhan, Sanosh Kunjalukkal
Licciulli, Antonio
ENERGY AND BUILDINGS, 2017, 151 : 494 - 500
[4] Synthesis of Al2O3-SiO2 aerogel from water glass with high thermal stability and low thermal conductivity
Chenkang Xia
Mingyuan Hao
Weihai Liu
Xinyuan Zhang
Yang Miao
Chao Ma
Feng Gao
Journal of Sol-Gel Science and Technology, 2023, 106 : 561 - 571
[5] Synthesis of Al2O3-SiO2 aerogel from water glass with high thermal stability and low thermal conductivity
Xia, Chenkang
Hao, Mingyuan
Liu, Weihai
Zhang, Xinyuan
Miao, Yang
Ma, Chao
Gao, Feng
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2023, 106 (02) : 561 - 571
[6] A vertically aligned anisotropic boron nitride nanosheet (BNNSs)/polyvinyl alcohol (PVA) composite aerogel with ultra-low thermal conductivity prepared by the prefreeze-freeze-drying method for efficient thermal management
Zhang, Yuan
Li, Yifan
Lei, Qiuxing
Zhu, Dahai
Zhang, Wenzhe
Wu, Xinfeng
Xie, Huaqing
Yu, Wei
MATERIALS TODAY COMMUNICATIONS, 2023, 36

← 1 →