纤维毡种类对柔性SiO_(2)气凝胶复合毡性能的影响  

Effect of fiber felt types on the properties of flexible silica aerogel composite felt

作　　者：张忠伦 董凤新 苏诗戈 王明铭 刘振森 侯建业 ZHANG Zhonglun;DONG Fengxin;SU Shige;WANG Mingming;LIU Zhensen;HOU Jianye(CNBM Technology Innovation Academy(Shandong)Co.,Ltd.,Zaozhuang 277100;Shandong Key Laboratory of Inorganic Functional Materials and Intelligent Manufacture,Zaozhuang 277000;China Building Materials Academy Co.,Ltd.,Beijing 100024)

机构地区：[1]中建材科创新技术研究院(山东)有限公司,山东枣庄277100 [2]山东省无机功能材料与智能制造重点实验室,山东枣庄277000 [3]中国建筑材料科学研究总院有限公司,北京100024

出　　处：《中国建材科技》2024年第3期45-50,共6页China Building Materials Science & Technology

基　　金：枣庄市自主创新及成果转化计划“建筑节能关键技术研发与示范应用”(2022GH11)。

摘　　要：以甲基三乙氧基硅烷(MTES)为硅源,酸碱两步法制备溶液,以玻璃纤维毡、陶瓷纤维毡复合、玄武岩纤维毡为基材,制备柔性SiO_(2)气凝胶复合毡。对SiO_(2)柔性气凝胶复合毡进行微观形貌、机械强度、导热系数、疏水角表征,探究纤维毡种类对SiO_(2)柔性气凝胶毡性能的影响。研究表明,在相同工艺条件下,玻璃纤维复合毡导热系数最低、密度最小、疏水性能最优、机械性能最好,常温下导热系数0.294W/(m·K),密度0.158g/cm^(3),疏水角149.9°,拉伸强度1.27MPa;陶瓷纤维复合毡体积收缩率最大、压缩强度最小,体积收缩率12.5%,压缩强度24N(20%ε)、44N(30%ε);玄武岩纤维复合毡体积收缩率最小、压缩强度最大,体积收缩率7.8%,压缩强度91N(20%ε)、267N(30%ε)。With methyl triethoxysilane (MTES) as the silicon source,the solution is prepared by two-step acid-base method.And with glass fiber felt,ceramic fiber felt and basalt fiber felt as the substrate,the flexible SiO_(2) aerogel fiber composite felt is prepared.The micromorphology,mechanical strength,thermal conductivity and hydrophobic angle of SiO_(2) aerogel composite felt are characterized to explore the influence of fiber felt types on the properties of aerogel felt.The results show that under the same process,aerogel glass fiber composite felt has the lowest thermal conductivity,the smallest density,and the best hydrophobic and mechanical performance.Its thermal conductivity at room temperature is0.294W/(m·K),the density is 0.158g/cm~3,the hydrophobic angle is 149.9°,and the tensile strength is 1.27MPa.Aerogel ceramic fiber composite felt has the largest volume shrinkage rate and the smallest compressive strength,with volume shrinkage rate of 12.5%and compressive strength of 24N (20%ε) and 44N (30%ε).Aerogel basalt fiber composite felt has the smallest volume shrinkage rate and the largest compressive strength,with volume shrinkage rate of 7.8%and compressive strength of 91N(20%ε)and 267N(30%ε).

关 键 词：MTES 纤维毡 柔性 

分 类 号：TB332[一般工业技术—材料科学与工程]