胶原纤维基气凝胶的可控制备及其对氰化氢的吸附研究  

Controllable Fabrication of Collagen Fibers-based Aerogel and its Adsorption Performances for HCN

作　　者：杨本刚 赵志鹏 施丰成 郝柏村 叶留志 郑婉 黄鑫[2,3] YANG Bengang;ZHAO Zhipeng;SHI Fengcheng;HAO Baicun;YE Liuzhi;ZHENG Wan;HUANG Xin(Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province,Chengdu 610011,China;National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)

机构地区：[1]卷烟减害降焦四川省重点实验室,四川成都610011 [2]四川大学制革清洁技术国家工程实验室,四川成都610065 [3]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《皮革科学与工程》2025年第3期11-16,24,共7页Leather Science and Engineering

基　　金：卷烟减害降焦四川省重点实验室开放基金资助项目(jykf202202)。

摘　　要：氰化氢(HCN)是一种剧毒物质,若不经妥善处理排放到大气中将对环境和人体造成巨大威胁。利用胶原纤维(CFs)为基材,以羧甲基纤维素钠(CMC)和聚乙烯亚胺(PEI)为粘接剂和表面修饰剂,通过冷冻干燥法制备了新型胶原纤维基气凝胶,用于对HCN的吸附去除。CFs具有独特的两亲性,可通过自组装形成超分子网络结构,CMC和PEI作为粘接剂可强化所形成的三维网络结构,同时PEI提供了丰富的碱性氨基功能团,可作为吸附位点与弱酸性HCN反应,从而实现对其的高效吸附。实验结果表明,通过PEI用量的改变可有效调控所制备的气凝胶的孔道结构,孔隙率最高可达92.56%,将该材料用于HCN的吸附,HCN降低率最高可达50.55%,压降低至184.3 Pa。Hydrogen cyanide(HCN)is a highly toxic compound,which poses significant adverse impacts on the environment and human health if it is discharged into the air without proper remediation.In this investigation,a novel collagen fibers-based aerogel was developed via freeze-drying method by utilizing collagen fibers(CFs)as raw materials with sodium carboxymethylcellulose(CMC)and polyethylenimine(PEI)serving as the binder and surface modifier for achieving the efficient adsorption and removal of HCN.CFs are featured with unique amphiphilicity,which enables the construction of supramolecular network structures through self-assembly.CMC and PEI worked as the binder to reinforce the as-formed three-dimensional network structure,while PEI also provides abundant alkaline amino functional groups to serve as adsorption sites to react with HCN,thus accomplishing efficient adsorption.The pore structure of the as-prepared aerogel was facilely regulated by changing the dosages of PEI,with a porosity as high as 92.56%.By applying the aerogel in the filtration of HCN-contained gas streams,the HCN reduction rate reached up to 50.55%,while the pressure drop was as low as 184.3 Pa.

关 键 词：氰化氢 胶原纤维 气凝胶 吸附 吸附材料 

分 类 号：TS512[轻工技术与工程—皮革化学与工程] TS411.2[农业科学—烟草工业]