文献类型：期刊文献

中文题名：甲基纤维素气凝胶的构建及其性能分析

英文题名：Fabrication and performance analysis of methylcellulose-based aerogels

作者：杨智英[1];覃海丽[1];赵巧丽[1];钟赛意[1,2];李瑞[1];陈建平[1];刘晓菲[1];宋兵兵[1];汪卓[1]

机构：[1]广东海洋大学食品科技学院,广东省水产品加工与安全重点实验室,广东省海洋生物制品工程实验室,广东省海洋食品工程技术研究中心,广东省亚热带果蔬加工科技创新中心,广东湛江524088;[2]广东海洋大学深圳研究院,广东深圳518108

年份：2025

卷号：51

期号：21

起止页码：261

中文期刊名：食品与发酵工业

外文期刊名：Food and Fermentation Industries

收录：北大核心2023、、EI(收录号：20260820115396)、北大核心

基金：国家自然科学基金资助项目(32402136);广东海洋大学科研启动基金项目(060302042402);广东海洋大学大学生创新创业训练计划项目(S202410566016)。

语种：中文

中文关键词：甲基纤维素;气凝胶;物理性质;微观结构;热稳定性

外文关键词：methylcellulose;aerogels;physical properties;microstructure;thermal stability

中文摘要：多糖基泡沫模板气凝胶是良好的油凝胶构建基材,可用作有效的动物脂肪替代源。该研究以甲基纤维素为原料,通过高速分散充气联合冷冻干燥技术制备了气凝胶,探究了甲基纤维素黏度和浓度对多糖水溶液和水泡沫性质的影响,并借助扫描电镜、红外光谱、X-射线衍射和热重分析等技术对气凝胶的性能进行了分析。结果表明,低黏度(450 mPa·s)甲基纤维素水溶液的膨胀率随着其浓度的增加而增大,而高黏度(40000 mPa·s和100000 mPa·s)甲基纤维素水溶液的膨胀率则呈减小趋势。与黏度为450 mPa·s和100000 mPa·s的甲基纤维素水泡沫相比,40000 mPa·s的甲基纤维素水泡沫呈现较好的稳定性,室温储存4 h仍未发生明显的分层。另外,甲基纤维素浓度对气凝胶的性质存在重要影响,其中,浓度为16 g/L的甲基纤维素(40000 mPa·s)气凝胶内部网孔结构更加均匀致密,孔隙分布较为均一,平均孔径较小,呈现较好的热稳定性,整体性能较为理想,可用作良好的生物基油凝胶构建模板。该研究将为绿色、安全动物脂肪替代品的开发提供技术参考。

外文摘要：Polysaccharide-based foam template aerogels are recognized as superior substrates for oleogels and can serve as effective alternatives to animal fats.In this study,methylcellulose was selected as the raw material,and a combination of high-speed dispersion,foaming,and freeze-drying technology was employed for the preparation of these aerogels.The effects of methylcellulose viscosity and concentration on the characteristics of polysaccharide solutions and foams were systematically investigated.Furthermore,scanning electron microscopy,Fourier-transform infrared spectroscopy,X-ray diffraction,and thermogravimetric analysis were utilized to comprehensively characterize the properties of the aerogels.The results indicated that the expansion rate of low-viscosity(450 mPa·s)methylcellulose aqueous solutions increased with higher concentrations,whereas the expansion rate of high-viscosity(40000 mPa·s and 100000 mPa·s)methylcellulose aqueous solutions decreased.Compared to methylcellulose aqueous foams with viscosities of 450 mPa·s and 100000 mPa·s,the 40000 mPa·s methylcellulose aqueous foam exhibited superior stability,with no layering observed after 4 h of room temperature storage.Additionally,the concentration of methylcellulose significantly influenced the properties of the aerogels.Specifically,the internal porous structure of the 16 g/L methylcellulose(40000 mPa·s)aerogel was more uniform and dense,with a relatively homogeneous pore distribution,smaller average pore size,and enhanced thermal stability,demonstrating excellent overall performance and suitability as a biological oleogel template.This study provides valuable technical insights for the development of green and safe alternatives to animal fats.