Hayase Gen, Kanamori Kazuyoshi, Abe Kentaro, Yano Hiroyuki, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki
Department of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
ACS Appl Mater Interfaces. 2014 Jun 25;6(12):9466-71. doi: 10.1021/am501822y. Epub 2014 Jun 6.
Polymethylsilsesquioxane-cellulose nanofiber (PMSQ-CNF) composite aerogels have been prepared through sol-gel in a solvent containing a small amount of CNFs as suspension. Since these composite aerogels do not show excessive aggregation of PMSQ and CNF, the original PMSQ networks are not disturbed. Composite aerogels with low density (0.020 g cm(-3) at lowest), low thermal conductivity (15 mW m(-1) K(-1)), visible light translucency, bending flexibility, and superhydrophobicity thus have been successfully obtained. In particular, the lowest density and bending flexibility have been achieved with the aid of the physical supporting effect of CNFs, and the lowest thermal conductivity is comparable with the original PMSQ aerogels and standard silica aerogels. The PMSQ-CNF composite aerogels would be a candidate to practical high-performance thermal insulating materials.
聚甲基倍半硅氧烷-纤维素纳米纤维（PMSQ-CNF）复合气凝胶是通过溶胶-凝胶法在含有少量作为悬浮剂的CNF的溶剂中制备的。由于这些复合气凝胶没有表现出PMSQ和CNF的过度聚集，原始的PMSQ网络未受到干扰。因此，成功获得了具有低密度（最低为0.020 g cm⁻³）、低导热率（15 mW m⁻¹ K⁻¹）、可见光半透明性、弯曲柔韧性和超疏水性的复合气凝胶。特别是，借助CNF的物理支撑作用实现了最低密度和弯曲柔韧性，并且最低导热率与原始PMSQ气凝胶和标准二氧化硅气凝胶相当。PMSQ-CNF复合气凝胶有望成为实用的高性能隔热材料。
