Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
Carbohydr Polym. 2018 Oct 1;197:277-283. doi: 10.1016/j.carbpol.2018.06.014. Epub 2018 Jun 4.
Composite aerogels with excellent mechanical properties were prepared by using carboxymethyl cellulose (CMC) as raw materials, 2D graphene oxide (GO) nanosheets as reinforcement, boric acid (BA) as cross-linker. By controlling the heat transfer rate, composite aerogels with isotropy and anisotropy structure were prepared, the mechanical and heat insulation properties were studied. The isotropy composite aerogel had compression strength of 110 kPa at 60% compression, which was 5 times of the axial and 14 times of the radial of anisotropy structure composite aerogels, and thermal conductivity was also lower than those of two directions of anisotropy composite aerogel. Besides, the mechanical properties of isotropy composite aerogels increased with the increase of GO content. When GO content was up to 5 wt%, the compressive strength and Young's modulus of composite aerogels reached 349 kPa and 1029 kPa, which were 1.6 and 4.5 times that of CMC aerogels, respectively.
采用羧甲基纤维素（CMC）为原料，二维氧化石墨烯（GO）纳米片为增强体，硼酸（BA）为交联剂，制备出具有优异力学性能的复合气凝胶。通过控制传热速率，制备出各向同性和各向异性结构的复合气凝胶，研究了其力学和隔热性能。各向同性复合气凝胶在 60%压缩时的压缩强度为 110kPa，是各向异性结构复合气凝胶轴向和径向的 5 倍和 14 倍，热导率也低于各向异性结构复合气凝胶的两个方向。此外，各向同性复合气凝胶的力学性能随 GO 含量的增加而提高。当 GO 含量达到 5wt%时，复合气凝胶的压缩强度和杨氏模量分别达到 349kPa 和 1029kPa，分别是 CMC 气凝胶的 1.6 倍和 4.5 倍。
