Qi You , Xiaolin Liu , Yichen Ou , Ya Zhong , Zhongyang Wu , Yiqi Zhao , Sheng Cui
{"title":"化学设计和微相分离有机硅/酚醛树脂双网络气凝胶优越的灵活性和绝热","authors":"Qi You , Xiaolin Liu , Yichen Ou , Ya Zhong , Zhongyang Wu , Yiqi Zhao , Sheng Cui","doi":"10.1016/j.compositesa.2025.109161","DOIUrl":null,"url":null,"abstract":"<div><div>Flexible aerogels play an important role in aerospace and architectural applications. However, it remains challenging to fabricate thermostable aerogels that combine flexibility, self-cleaning capability, and freeze resistance. Here, by strategically incorporating flexible long-chain silanes into the rigid aerogel network while precisely adjusting the skeleton and pore structure through microcosmic phase separation, we significantly improved both the flexibility and functionality of phenolic resin aerogels (PRAs). The micro nano structure regulated a unique network structure that made the aerogel highly flexible and thermal insulating. The as-prepared flexible aerogel exhibited outstanding deformability (up to 90 % damage strain) and great fatigue resistance (>500 compression cycles at 40 % strain), while maintaining ultra-low density (0.052 g·cm<sup>−3</sup>) and low thermal conductivity (0.0364 W·m<sup>−1</sup>·K<sup>−1</sup>). It also showed interesting self-cleaning and frost resistance properties. Thanks to its excellent thermal stability, this flexible aerogel is suitable for use as static thermal insulation below 220°C. Remarkably, it serves as an outstanding energy-saving building material: the house model constructed with this flexible aerogel maintained an indoor temperature of 15°C even in frigid environments as low as −12 °C. The unique combination of properties makes this flexible aerogel a highly promising thermal insulation material for both construction and aerospace applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109161"},"PeriodicalIF":8.1000,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chemical design and microphase separation of silicone/phenolic resin double-network aerogels for superior flexibility and thermal insulation\",\"authors\":\"Qi You , Xiaolin Liu , Yichen Ou , Ya Zhong , Zhongyang Wu , Yiqi Zhao , Sheng Cui\",\"doi\":\"10.1016/j.compositesa.2025.109161\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Flexible aerogels play an important role in aerospace and architectural applications. However, it remains challenging to fabricate thermostable aerogels that combine flexibility, self-cleaning capability, and freeze resistance. Here, by strategically incorporating flexible long-chain silanes into the rigid aerogel network while precisely adjusting the skeleton and pore structure through microcosmic phase separation, we significantly improved both the flexibility and functionality of phenolic resin aerogels (PRAs). The micro nano structure regulated a unique network structure that made the aerogel highly flexible and thermal insulating. The as-prepared flexible aerogel exhibited outstanding deformability (up to 90 % damage strain) and great fatigue resistance (>500 compression cycles at 40 % strain), while maintaining ultra-low density (0.052 g·cm<sup>−3</sup>) and low thermal conductivity (0.0364 W·m<sup>−1</sup>·K<sup>−1</sup>). It also showed interesting self-cleaning and frost resistance properties. Thanks to its excellent thermal stability, this flexible aerogel is suitable for use as static thermal insulation below 220°C. Remarkably, it serves as an outstanding energy-saving building material: the house model constructed with this flexible aerogel maintained an indoor temperature of 15°C even in frigid environments as low as −12 °C. The unique combination of properties makes this flexible aerogel a highly promising thermal insulation material for both construction and aerospace applications.</div></div>\",\"PeriodicalId\":282,\"journal\":{\"name\":\"Composites Part A: Applied Science and Manufacturing\",\"volume\":\"198 \",\"pages\":\"Article 109161\"},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2025-07-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Composites Part A: Applied Science and Manufacturing\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1359835X25004555\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MANUFACTURING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Part A: Applied Science and Manufacturing","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359835X25004555","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MANUFACTURING","Score":null,"Total":0}
Chemical design and microphase separation of silicone/phenolic resin double-network aerogels for superior flexibility and thermal insulation
Flexible aerogels play an important role in aerospace and architectural applications. However, it remains challenging to fabricate thermostable aerogels that combine flexibility, self-cleaning capability, and freeze resistance. Here, by strategically incorporating flexible long-chain silanes into the rigid aerogel network while precisely adjusting the skeleton and pore structure through microcosmic phase separation, we significantly improved both the flexibility and functionality of phenolic resin aerogels (PRAs). The micro nano structure regulated a unique network structure that made the aerogel highly flexible and thermal insulating. The as-prepared flexible aerogel exhibited outstanding deformability (up to 90 % damage strain) and great fatigue resistance (>500 compression cycles at 40 % strain), while maintaining ultra-low density (0.052 g·cm−3) and low thermal conductivity (0.0364 W·m−1·K−1). It also showed interesting self-cleaning and frost resistance properties. Thanks to its excellent thermal stability, this flexible aerogel is suitable for use as static thermal insulation below 220°C. Remarkably, it serves as an outstanding energy-saving building material: the house model constructed with this flexible aerogel maintained an indoor temperature of 15°C even in frigid environments as low as −12 °C. The unique combination of properties makes this flexible aerogel a highly promising thermal insulation material for both construction and aerospace applications.
期刊介绍:
Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.