张婷婷   

Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Main positions: 大工书院党委副书记兼副院长

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Language:English

Paper Publications

Title of Paper:硅藻土制备介孔SiO2气凝胶

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Date of Publication:2013-04-15

Journal:土木建筑与环境工程

Included Journals:ISTIC、CSCD、Scopus

Volume:35

Issue:2

Page Number:141-146,158

ISSN No.:1674-4764

Key Words:硅藻土 水玻璃 响应面法 SiO2气凝胶 介孔

Abstract:采用响应面法对由硅藻土制取水玻璃的工艺进行优化,进而选择最佳工艺参数在常压干燥下成功合成了SiO2气凝胶材料.试验结果表明:当碱硅比为3∶10,NaOH溶液浓度为10%,反应温度为90℃时,水玻璃模数测定值与SiO2溶出率的加权平均值达到最大值79.91%;利用N2物理吸附、FESEM、TEM、FT-IR、TG/SDTA对气凝胶的基本性能和形貌结构进行了研究.结果表明,制备得到的气凝胶密度为0.132~0.143 g/m3,比表面积达755.5 m2/g,形貌为不规则纳米晶粒堆积而成的海绵状结构,孔径分布集中,经改性后的气凝胶的疏水性可保持到400℃左右.

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