多胺修饰大豆分离蛋白-氧化石墨烯复合气凝胶构筑及其高效去除糖精机制解析  

Construction of Polyamine Modified Soy Protein/Graphene Oxide Composite Aerogel and Mechanism by Which It Efficiently Removes Saccharin

作　　者：熊艳舒 韦伟 李楣 王佳欣 陆海勤[1] 李文 李凯[1,3,4] XIONG Yanshu;WEI Wei;LI Mei;WANG Jiaxin;LU Haiqin;LI Wen;LI Kai(School of Light Industry and Food Engineering,Guangxi University,Nanning 530004,China;Key Laboratory of Chemistry and Engineering of Forest Products(State Ethnic Affairs Commission),Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products,School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530008,China;Collaborative Innovation Center for Sugar Industry Co-built by Provincial and Ministerial Departments,Guangxi University,Nanning 530004,China;Academy of Sugarcane and Sugar Industry,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学轻工与食品工程学院,广西南宁530004 [2]广西民族大学化学化工学院,林产化学与工程国家民委重点实验室,广西林产化学与工程重点实验室,广西林产化学与工程协同创新中心,广西南宁530008 [3]广西大学蔗糖产业省部共建协同创新中心,广西南宁530004 [4]广西大学甘蔗与制糖产业学院,广西南宁530004

出　　处：《食品科学》2025年第7期23-33,共11页Food Science

基　　金：国家自然科学基金青年科学基金项目(32001741);广西科技重大专项(桂科AA22117015-3);现代农业产业糖料技术体系项目(CARS-17);广西大学甘蔗与制糖产业学院专项科研项目(ASSI-20230013)。

摘　　要：为解决人工甜味剂作为一种新型污染物引起的食品安全隐患与环境危害问题,本研究利用聚乙烯亚胺改性大豆分离蛋白(soy protein isolate,SPI)层插氧化石墨烯(graphene oxide,GO)构筑环境友好型生物质基气凝胶(PSPI-GO),以高效去除水体中典型人工甜味剂——糖精(saccharin,SAC)。PSPI-GO对SAC的平衡吸附容量为293 mg/g,对应去除率达91%。系列表征结合吸附实验结果表明,PSPI-GO具有丰富的多孔结构及优异的可再生性能。多重量子化学理论计算(静电势、前沿分子轨道、独立梯度模型和Hirshfeld表面)进一步揭示静电吸引力、氢键键合和分子间相互作用主导吸附过程的进行。这项工作不仅可实现生物质的高值化利用,还可为高效清除SAC提供新途径。同时,宏观传质机制解析耦联多重量子化学计算可视化吸附机制的研究策略可为阐明分子间深层次吸附行为提供新视角。To solve the problem of potential food safety hazards and environmental hazards associated with artificial sweeteners as emerging pollutants,an eco-friendly aerogel(PSPI-GO)consisting of polyethyleneimine-modified soy protein isolate(PSPI)and graphene oxide(GO)was constructed to efficiently eliminate saccharin(SAC),a typical artificial sweetener in water.The equilibrium adsorption capacity of PSPI-GO for SAC was 293 mg/g,which removed 91%of SAC.PSPI-GO exhibited a highly porous structure and excellent renewability.Multiple quantum chemical theory calculations including electrostatic potential(ESP),frontier molecular orbital(FMO),independent gradient model based on Hirshfeld partition(IGMH),and Hirshfeld surface analysis(HSA)further elucidated that electrostatic attraction,hydrogen bonding,and inter-molecular interactions dominate the adsorption process.This work achieved high-value utilization of SPI while providing a new strategy for efficient removal of SAC.The research strategy integrating analysis of macroscopic mass transfer mechanisms and visualization of the adsorption mechanism provides a new perspective for in-depth understanding of inter-molecular adsorption behavior.

关 键 词：量子化学理论计算 人工甜味剂 气凝胶 吸附机制 生物质高值化 

分 类 号：TS244.2[轻工技术与工程—制糖工程]