超临界流体干燥法制备炭气凝胶  

PREPARATION OF CARBON AEROGELS USING SUPERCRITICAL FLUID DRYING TECHNIQUE

作　　者：李文翠[1] 郭树才[1] 赵旭东[1] 

机构地区：[1]大连理工大学炭资源综合利用开放实验室,辽宁大连116012

出　　处：《炭素技术》2000年第3期7-9,共3页Carbon Techniques

基　　金：国家自然科学基金资助项目!( 59672026)

摘　　要：以间苯二酚和甲醛为原料， Ca(OH)2为催化剂，经溶胶—凝胶过程得水凝胶 ;以超临界 CO2干燥水凝胶，得到网络间充满气体的固态材料气凝胶，再经高温热解得炭气凝胶。 TEM表征结果显示：气凝胶和炭气凝胶均具有规则的纳米网络结构，网络节点粒径约 10 nm，典型网络孔径小于 50 nm。Aquagels are synthesized by sol－ gel process from resorcinol and formaldhyde with Ca(OH)2 as catalyst, and carbon aerogels are obtained following first the supercritical CO2 drying of aquagels and then pyrolysis of aerogels. TEM examination shows that aerogels and carbon aerogels have a regular nanometer network consisited of interconnected bead, these beads are about 10 nm in diameter, the typical pore size of network is smaller than 50 nm.

关 键 词：超临界流体干燥 炭气 凝胶 纳米结构 

分 类 号：TQ427.26[化学工程] TQ127.11