3D打印柔性SiO2气凝胶复合材料的研究
Study on 3D Printing Flexible SiO2 Aerogel Composites
陈浩 1储成义 2王雨婷 2鲍希希 2邱琢皓 2程昱川 2郭建军 2单兴刚 3孙爱华2
作者信息
- 1. 宁波大学材料科学与化学工程学院,宁波 315211
- 2. 中国科学院宁波材料技术与工程研究所,浙江省增材制造材料重点实验室,宁波 315201
- 3. 浙江理工大学科技与艺术学院,绍兴 312369
- 折叠
摘要
SiO2气凝胶因特殊网络结构而存在优异的性质,如高比表面积、高孔隙率、低热导率和低密度,是优异的保温绝热材料.但SiO2气凝胶机械性能脆弱,导致传统制造方法难以制备复杂和微小型构件,极大地阻碍了 SiO2气凝胶在隔热领域的发展和应用.本文通过3D打印直写技术制备了柔性SiO2气凝胶复合材料,通过研究不同聚乙烯醇(PVA)溶液和十八酸钠(C17H35COONa)的含量,找到最佳浆料配比,打印的柔性SiO2气凝胶复合材料在100 ℃下的热导率低至0.026 W/(m·K),同时具有较好的压缩性能、弯曲性能和疏水性.这项研究为SiO2气凝胶的规模化应用提供一种可能.
Abstract
SiO2 aerogel is an excellent thermal insulation material,which has excellent properties,due to its special network structure,such as high specific surface area,high porosity,low thermal conductivity and low density.However,the mechanical properties of SiO2 aerogel are fragile,which makes it difficult to prepare complex and miniature components by traditional manufacturing methods,which greatly hinders the development and application of SiO2 aerogel in the field of heat insulation.In this paper,flexible SiO2 aerogel composites were prepared by 3D printing direct writing technology.By studying the content of different polyvinyl alcohol solutions and sodium stearate,the optimal slurry ratio was found.The thermal conductivity of the printed flexible SiO2 aerogel composites at 100 ℃ is as low as 0.026 W/(m·K),and it has good compression performance,bending performance and hydrophobicity.This study provides a possibility for the large-scale application of SiO2 aerogel.
关键词
气凝胶/SiO2/3D打印/柔性/低热导率/疏水Key words
aerogel/SiO2/3D printing/flexible/low thermal conductivity/hydrophobicity引用本文复制引用
基金项目
国家自然科学基金(52273241)
浙江省教育厅科研项目(Y202248464)
出版年
2024
国家科技期刊平台
NSTL
万方数据