双醛淀粉交联纤维素纳米晶/油莎豆淀粉复合薄膜的制备及性能  

Preparation and Properties of Dialdehyde Starch Crosslinked Cellulose Nanocrystal/Tiger Nut Starch Composite Film

作　　者：何荣军[1] 盖琳琳 朱洲谊 孙培龙[1] HE Rongjun;GAI Linlin;ZHU Zhouyi;SUN Peilong(College of Food Science and Technology,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学食品科学与工程学院,浙江杭州310014

出　　处：《食品科学》2025年第9期100-108,共9页Food Science

基　　金：浙江省科技计划项目(2022C02063,KYY-HX-20200317)。

摘　　要：为改善纤维素纳米晶(cellulose nanocrystal,CNC)/淀粉复合薄膜延展性差的问题,本研究以油莎豆粕为原料,分别制备油莎豆淀粉(tiger nut starch,TNS)、双醛淀粉(dialdehydes starch,DAS)和CNC,讨论不同添加量DAS对CNC/TNS复合薄膜结构和性能的影响。结果显示:在傅里叶变换红外光谱1730 cm^(-1)处有代表醛基的特征峰,DAS呈无定形片状结构,醛基相对含量为85.35%。复合薄膜中,傅里叶变换红外光谱对应醛基特征峰消失并伴随羟基吸收峰的减弱,X射线衍射图谱中对应于CNC的结晶峰减弱或消失,证明DAS与CNC和TNS均发生了交联。交联后,所有复合薄膜分子间作用力增强,分子内部结构改变,断裂伸长率显著提高21.16%~83.31%。其中DAS质量分数为0.2%和1.0%的薄膜中CNC与TNS的相容性增加,粗糙度和厚度减小,氧气阻隔性能分别提升14.14%和51.37%。本研究结果表明,DAS在适宜的浓度下可以显著提升CNC/淀粉复合薄膜的综合性能。To address the poor extensibility of cellulose nanocrystal(CNC)/starch composite film,tiger nut starch(TNS),dialdehyde starch(DAS),and CNC were prepared from tiger nut meal and used to fabricate CNC/TNS composite films incorporated with different concentrations of DAS.The effects of different concentrations of DAS on the structure and properties of CNC/TNS composite films were investigated.The results showed that the characteristic peak corresponding to the aldehyde group appeared at 1730 cm^(-1) in the Fourier transform infrared spectroscopy(FTIR).DAS exhibited an amorphous flake-like structure with a relative aldehyde content of 85.35%.The characteristic peak for aldehyde groups disappeared in the FTIR of the composite film,accompanied by a decrease in the hydroxyl absorption peak.The X-ray diffraction(XRD)pattern showed a reduction or disappearance of the crystallization peak corresponding to CNC,indicating that DAS was crosslinked with both CNC and TNS.After crosslinking,the intermolecular interactions in the composite films were enhanced,resulting in changes in the internal molecular structure and a 21.16%–83.31%increase in elongation at break.The films with DAS concentrations of 0.2%and 1.0%showed improved compatibility between CNC and TNS,as well as reduced roughness and thickness,and the oxygen barrier capacity increased by 14.14%and 51.37%,respectively.These findings demonstrate that DAS,at an appropriate concentration,can significantly enhance the overall properties of CNC/starch composite film.

关 键 词：双醛淀粉 交联 纤维素纳米晶 油莎豆淀粉 生物可降解薄膜 

分 类 号：TS210.9[轻工技术与工程—粮食、油脂及植物蛋白工程]