摘要
以淀粉为原料,花青素为功能性物质,采用静电纺丝法制备了淀粉纳米纤维智能指示膜,并研究其结构和性能。结果表明:花青素负载量的增加会增大纤维直径和指示膜的水接触角。指示膜的晶态决定其力学性能,花青素添加到10%以上时指示膜结晶度较高其断裂应力也随之升高,达到了12.0 MPa,但断裂伸长率减小到了5.8%。加入花青素的指示膜热稳定性有所提升。静电纺丝过程不会改变淀粉和花青素的分子结构,指示膜的指示功能主要是通过花青素中酚羟基的电离状态改变引起颜色变化实现,抗氧化功能是酚羟基提供的还原性赋予的。这些结果证明了淀粉花青素智能指示膜具有良好的指示性,可用于监测食品品质变化。
Starch was used as raw material and anthocyanins were used as functional substances.Intelligent indicator films of starch nanofibers were prepared by electrospinning method,and their structure and properties were studied.The results showed that the fiber diameter and the water contact Angle of the indicator films increased with the increase of anthocyanin loading.The crystal state of the indicated film determined its mechanical properties.When the anthocyanin was added to more than 10%,the fracture stress of the indicated film was higher,reaching 12.0MPa,but the elongation at break reduced to 5.8%.When anthocyanins were added,the thermal stability of the indicator film was improved.The molecular structure of starch and anthocyanin did not changed in the process of electrospinning.The indicator function of the indicator film was mainly realized through the color change caused by the change of ionizing state of phenolic hydroxyl group in anthocyanin.The antioxidant function was due to the reducibility provided by phenolic hydroxyl group.These results proved that the intelligent indicator film of amyloanthocyanin had the good indicator property and could be used to monitor food quality change.
作者
袁虎
陈复生
YUAN Hu;CHEN Fu-sheng(College of Food Science and Technology,Henan University of Technology,Zhengzhou,Henan 450001,China;Food Laboratory of Zhongyuan,Luohe,Henan 462300,China)
出处
《粮油食品科技》
CAS
CSCD
北大核心
2024年第4期129-135,共7页
Science and Technology of Cereals,Oils and Foods
基金
国家重点研发计划(2022YFD2101403)。
关键词
淀粉
花青素
静电纺丝法
纳米纤维
智能指示膜
starch
anthocyanins
electrospinning
nanofiber
intelligent indicating film
