Rollings De-ann E, Veinot Jonathan G C
Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2 Canada.
Langmuir. 2008 Dec 2;24(23):13653-62. doi: 10.1021/la801595m.
A detailed study of polysiloxane nanofiber formation by surface initiated polymerization of vapor phase organotrichlorosilane reagents is presented. Substrate composition, substrate activation, reagent quantity, reaction pressure, and reaction time are parameters shown to influence nanofiber synthesis. Stepwise variation of the parameters isolates the role of each on polysiloxane nanofiber growth, and a mechanism for fiber formation is proposed based on these findings. Tunable aqueous wettability of the fibers is also demonstrated in this report, with contact angles varying from 85 degrees to 130 degrees +/- 2 degrees depending upon fiber surface density and length. Aqueous contact angles are further increased to >150 degrees by either solution functionalization of calcined fibers or copolymerization with an organofluorosilane
本文详细研究了通过气相有机三氯硅烷试剂的表面引发聚合形成聚硅氧烷纳米纤维的过程。研究表明，底物组成、底物活化、试剂用量、反应压力和反应时间等参数会影响纳米纤维的合成。通过逐步改变这些参数，可以分离出每个参数对聚硅氧烷纳米纤维生长的作用，并基于这些发现提出了纤维形成的机制。本报告还展示了纤维可调的水润湿性，根据纤维表面密度和长度的不同，接触角在85度至130度±2度之间变化。通过煅烧纤维的溶液功能化或与有机氟硅烷共聚，水接触角可进一步提高到>150度。
