炭气凝胶的常压干燥制备研究

摘要

实验以间苯二酚（Resorcinol ，简称R）与甲醛（Formaldehyde ，简称F）以一定的摩尔比混合，加入二次去离子水作为溶剂并用碱性试剂作为催化剂，在恒温水浴中生成RF湿凝胶。在常温下用丙酮浸泡湿凝胶以置换水，制备出RF凝胶。最后将RF气凝胶置于管式炉中，在氮气保护气氛下，高温炭化得到炭气凝胶，并用TG-DTA ，XRD、高倍显微镜等方法对其表面形貌及结构进行分析。%In this paper , the preparation process of carbon aerogels is operated by Resorcinol (Resorcinol ,referred to as R ) and Formaldehyde (Formaldehyde ,referred to as F) at a certain mole ratio of mixture ,then add secondary deionized water as solvent and alkaline reagent as catalyst ,gen-erate RF wet gel in the constant temperature water bath .At room temperature ,soak wet gel with ac-etone to replace water ,so RF aerogel is prepared .Finally put the RF aerogel at tube furnace ,under nitrogen atmosphere ,high temperature carbonization of carbon aerogels .TG -DTA ,SEM and high -power microscope were used to characterize the carbon aerogels .