Reconstruction and functionalization of aerogels by controlling mesoscopic nucleation to greatly enhance macroscopic performance  

作　　者：焦晨璐 邵光伟 陈宇岳 刘向阳 Chen-Lu Jiao;Guang-Wei Shao;Yu-Yue Chen;Xiang-Yang Liu(College of Ocean and Earth Sciences,Shenzhen Research Institute of Xiamen University,Xiamen University,Shenzhen/Xiamen 361005,China;College of Textile and Clothing Engineering,Soochow University,Suzhou 215006,China;Engineering Research Center of Technical Textiles,Ministry of Education,College of Textiles,Donghua University,Shanghai 201620,China)

机构地区：[1]College of Ocean and Earth Sciences,Shenzhen Research Institute of Xiamen University,Xiamen University,Shenzhen/Xiamen 361005,China [2]College of Textile and Clothing Engineering,Soochow University,Suzhou 215006,China [3]Engineering Research Center of Technical Textiles,Ministry of Education,College of Textiles,Donghua University,Shanghai 201620,China

出　　处：《Chinese Physics B》2023年第3期25-35,共11页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 12074322);Shenzhen Science and Technology Plan Project (Grant No. JCYJ20180504170208402);Science and Technology Project of Xiamen City (Grant No. 3502Z20183012);Science and Technology Planning Project of Guangdong Province,China (Grant No. 2018B030331001)

摘　　要：This work presents a strategy for the mesoscopic engineering of hierarchically structured sodium alginate(SA)aerogels to enhance the macroscopic performance.The strategy was implemented by meso-functionalizing and reorganizing SA aerogels via controlled heterogeneous nucleation,in which microcrystalline cellulose-manganese dioxide(MCC-MnO_(2))nano-crystallites worked as template.Due to the short rod-like structure and abundant hydroxyl groups of MCC-MnO_(2),the organized mesostructure of SA aerogels was reconstructed during the assembly of SA molecule chains,which gave rise to a significant enhancement in macroscopic performance of SA areogels.For instance,the functionalized and reconstructed MCC-MnO_(2)/SA aerogels acquired a more than 70%increase in mechanical strength with an excellent deformation recovery.Furthermore,an almost double enhancement of removal capacity for metal ions(i.e.,Cu^(2+)and Pb^(2+))and organic dyes(i.e.,congo red and methylene blue)was obtained for MnO_(2)/SA aerogels,with an 87%repossession of the pollutants removal performance after 5 operation cycles.

关 键 词：mesoscopic reconstruction AEROGEL sodium alginate microcrystalline cellulose MnO_(2)nanoparticles 

分 类 号：TQ427.26[化学工程] X703[环境科学与工程—环境工程]