界面增强二氧化硅气凝胶复合功能材料的制备及其性能研究  

Preparation and performance study of interface reinforced silica aerogel composite functional materials

作　　者：房爱省 李海明 李洪彦 FANG Ai-xing;LI Hai-ming;LI Hong-yan(Huayi(Tianjin)New Materials Technology Co.,Ltd.,Tianjin 300350,China;School of Materials Science and Engineering,T ianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]华燚(天津)新材料科技有限公司,天津300350 [2]天津城建大学材料科学与工程学院,天津300384

出　　处：《现代化工》2025年第3期131-136,共6页Modern Chemical Industry

基　　金：天津市自然科学基金(18JCQNJC03000)。

摘　　要：以正硅酸乙酯(TEOS)为前驱体,通过溶胶-凝胶法制备了具有静电作用相界面的聚合物/SA复合材料。通过核磁共振波谱仪(NMR)、傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)、Zeta电位检测仪等对试样进行表征。结果表明,通过引入带电单体甲基丙烯酰氧乙基三甲基氯化铵(MTC)成功制备了具有静电作用相界面的SA复合材料,保持了原有纳米多孔结构。二氧化硅相和聚合物相之间较强的静电相互作用有效阻止了共聚物的团聚。在热降解过程中受静电力的限制,减小了活性自由基的碰撞概率。静电作用相界面具有较高的界面热阻,可以提高SA复合材料的热稳定性,并可以有效进行载荷转移。Polymer/SA composites with electrostatically interacting phase interfaces are prepared through the sol-gel method with ethyl orthosilicate(TEOS)as a precursor.The specimens are characterized by means of nuclear magnetic resonance(NMR)spectroscopy,Fourier transform infrared(FT-IR)spectroscopy,thermogravimetric analysis(TG),and Zeta potential detection.Results show that SA composites that have phase interfaces with electrostatic interaction and maintain the original nano-porous structure are successfully prepared through adding methacryloyloxyethyl trimethyl ammonium chloride(MTC)that is a charged monomer.The strong electrostatic interaction between silica phases and polymer phases prevents effectively the agglomeration among copolymers.The collision probability of active radicals reduces due to the limitation of electrostatic force during thermal degradation.The phase interfaces with electrostatic interaction have a high interfacial thermal resistance,which improves the thermal stability of SA composites and enables load transfer to conduct effectively.

关 键 词：SiO_(2)气凝胶 聚合物增强 相界面 导热性能 

分 类 号：TB332[一般工业技术—材料科学与工程]