杨絮纳米纤维素气凝胶的制备及表征

Preparation and Characterization of Populus Tomentosa Nano-Cellulose Aerogels

本试验以杨絮为原料,经化学预处理,得到纯化纤维素,再经机械处理制备纳米纤维素溶胶,通过液氮对杨絮纳米纤维素溶胶进行冷冻处理,制备得到杨絮纳米纤维素气凝胶。为探究不同超声处理时间对杨絮纤维微纤化的影响,笔者从气凝胶的密度、孔隙率、微观形貌等方面进行分析,进而探究了超声处理时间对所得气凝胶性能的影响。

This experiment used Populus tomentosa as raw material,after chemical pretreatment,pure cellulose,mechanical treatment to prepare nanometer cellulose sol.Through the liquid nitrogen on the poplar nanocellulose sol frozen.The nanofibrous aerogels were prepared and the effects of different sonication time on the microfibrillation of poplar fibers were investigated.From the airgel density,porosity,micro-morphology and other aspects of analysis,The effect of ultrasound time on the resulting airgel was further explored.