Mg/Al(CO_3)-LDHs/纤维素气凝胶的机械性能研究  

Mechanical analysis of Mg/Al(CO_3)-LDHs/cellulose aerogels

作　　者：骆晓蕾 李震 张梅飞 马廷方 刘琳[1] 姚菊明[1] LUO Xiaolei;LI Zhen;ZHANG Meifei;MA Tingfang;LIU Lin;YAO Juming(Silk Institute,College of Materials and Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China;Wensli Group Co.Ltd.,Hangzhou 310021,China)

机构地区：[1]浙江理工大学纺织与材料学院丝绸学院,杭州310018 [2]万事利集团有限公司,杭州310021

出　　处：《浙江理工大学学报（自然科学版）》2018年第4期403-409,共7页Journal of Zhejiang Sci-Tech University(Natural Sciences)

摘　　要：通过双滴定共沉淀法制备Mg/Al(CO_3)-层状双金属氢氧化物(Layered double hydroxides,LDHs)无机纳米颗粒,并将其与纤维素复合,制备具有微孔结构的Mg/Al(CO_3)-LDHs/纤维素复合气凝胶材料。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、热重分析仪(TG)、傅里叶变换红外光谱仪((FITR)、动态热机械性能分析(DMA)、压缩测试及旋转流变测试,分析了Mg/Al(CO_3)-LDHs无机纳米颗粒添加量对Mg/Al(CO_3)-LDHs/纤维素复合气凝胶的形貌、热稳定性及机械性能的影响。结果表明:层状双金属氢氧化物纳米颗粒可以在维持气凝胶多孔形貌的同时增强机械性能及热稳定性,复合气凝胶的最大压缩应力随Mg/Al(CO_3)-LDHs的增加而变大,当Mg/Al(CO_3)-LDHs与纤维素的质量比为2∶5时,复合纤维素气凝胶的压缩强度是纯纤维素气凝胶的约两倍。Mg/Al（CO3）-layered double hydroxides（Mg/Al（CO3）-LDHs）were prepared via double titration coprecipitation method and then compounded with cellulose for the porous materialsMg/Al（CO3）-LDHs/cellulose composite aerogels.The Mg/Al（CO3）-LDHs/cellulose composite aerogels were tested by scanning electron microscopy（SEM）,X-ray diffraction（XRD）,thermogravimetric analysis（TG）,Fourier transform infrared spectroscopy（FITR）and dynamic thermomechanical analysis（DMA）to analyze their morphology,thermal stability and mechanical properties bythe addition amount of Mg/Al（CO3）-LDHsnanoparticle.The result showed that LDHs enhanced the mechanical and thermal stability of the material while maintaining the porous morphology of the aerogels.The mechanical and thermal stability were all improved with the increasing Mg/Al（CO3）-LDHs,when the mass ratio of Mg/Al（CO3）-LDHs and cellulose is 2∶5,themaximum compressive stress of composite cellulose aerogels was nearly double the maximum compressive stress of pure cellulose aerogels.

关 键 词：层状双金属氢氧化物 热稳定性 动态机械性能 纤维素气凝胶 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]