脱脂棉纳米微晶纤维素的制备及其作为海藻酸盐-淀粉复合薄膜增强剂的应用  

Preparation of nanocrystalline cellulose from degreasing cotton and application as reinforcing agent in alginate-starch composite membranes

作　　者：郄冰玉 唐亚丽 卢立新 王军[1,2] 丘晓琳 QIE Bing-yu TANG Ya-li LU Li-xin WANG Jun QIU Xiao-lin(Mechanical Engineering College, Jiangnan University, Wuxi 214122, China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment ＆ Technology, Wuxi 214122, China)

机构地区：[1]江南大学,机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《食品工业科技》2017年第3期63-67,共5页Science and Technology of Food Industry

基　　金：国家自然科学基金(31101376,31671909);中央高校基本科研基金(JUSRP51406A)

摘　　要：探究了纳米微晶纤维素对海藻酸盐-淀粉复合薄膜的增强效果。以脱脂棉为原料,采用化学预处理结合超声破碎法制备纳米微晶纤维素(NCC);以马铃薯淀粉与海藻酸钠为成膜基材,以甘油为增塑剂,将NCC作为增强组分,通过流延法制备复合薄膜。微观形貌观察表明,脱脂棉NCC呈棒状,直径30 nm左右,长径比约为8;对复合膜的机械性能、阻隔性能、光学性能、水溶性、热稳定性和红外光谱检测表明,当NCC的添加量为5%(w/w)时,可以有效提高复合膜的拉伸强度、水溶时间和热稳定性,降低复合膜的透湿系数,而对复合膜的透光性影响不大。To explor the enhanced effect of nanocrystalline cellulose（NCC） in alginate-starch based composite films.NCC was prepared from degreasing cotton by chemical pre-treatment combine with ultrasonic disruption.The alginate-starch composite films were prepared by solution casting method, using NCC as enhanced component and glycerol as plasticizer. The mierostructure observation showed that NCC from degreasing cotton was rod-like with an aspect ratio about 8, and its diameter was about 30 nm. The mechanical properties, barrier properties, optical properties, water solubility, DSC and FTIR of the composite films were tested, the results indicated that 5 % （w/w） NCC can efficiently increase the tensile strength, dissolution time and thermal stability of alginate-starch based films, the water vapor permeability coefficient of the composite film with 5 % （w/w） NCC was also reduced,besides,5% （w/w） NCC almost didn＇ t affect the transparency of composite films.

关 键 词：纳米微晶纤维素 复合薄膜 增强剂 海藻酸盐 淀粉 

分 类 号：TS201.1[轻工技术与工程—食品科学]