摘要
采用低共熔溶剂(Deep eutectic solvent, DES)对丝素纤维和纤维素浆粕进行预处理,随后进行超声均质处理,制得丝素蛋白纳米纤维(Silk nanofibers, SNF)和纤维素纳米纤维(Cellulose nanofibers, CNF);进一步通过抽滤自组装方式制得纳米纤维复合膜。对纳米纤维的形貌、结构、物化性能进行了表征,并探究了纳米纤维膜的湿敏响应性能。结果表明:制得的纳米纤维平均直径和平均长度分别为25.33~34.49 nm和3.21~5.73μm;结构测试证明DES预处理为物理过程,纳米纤维保持原料良好热稳定性特征。纳米纤维膜表面平整且具有多孔结构,膜透光率最高可达70.0%。CNF的存在可显著提高纳米纤维膜断裂强度。纳米纤维膜具有明显湿敏响应性,10 s内弯曲角达到最大,且响应速率随湿度差(30%~70%)的增加而增大。利用纤维膜湿敏响应特点,可成功驱动纸青蛙进行直行、转弯等运动。该纳米纤维膜可用于湿气检测、软体机器人等领域。
Deep eutectic solvent(DES) was used to preprocess silk fibroin and cotton cellulose pulp. Then, silk fibroin nanofibers(SNF) and cellulose nanofibers(CNF) were prepared through ultrasonic homogenization. Subsequently, nanofiber composite membranes were prepared through vacuum filtration self-assembly. The morphology, structure, and physicochemical properties of the nanofibers were characterized in the paper, and the humidity sensitive response performance of the nanofiber membrane was explored. The results have shown that the average diameter and the average length of the prepared nanofibers were in the range of 25.33~34.49 nm and 3.21~5.73 μm, respectively. Structural testing demonstrated that DES pretreatment was a physical process, and the nanofiber could keep good thermal stability of the raw materials. The surface of the nanofiber membrane was flat with a porous structure. Moreover, the light transmittance of the membrane could reach 70.0%. The presence of CNF could significantly improve the breaking strength of nanofiber membranes. In particular, the nanofiber membranes had obvious humidity responsiveness. The bending angle reached its maximum value within 10 s. Meanwhile, the response rate increased with the increase of humidity difference(30%~70%). Based on the moisture-sensitive response characteristics of the membrane, paper frog was successfully driven to move forward, turn, etc. The nanofiber composite membranes can be used in moisture detection, soft robot and other fields.
作者
张梦怡
蒋奕妍
付飞亚
刘向东
ZHANG Mengyi;JIANG Yiyan;FU Feiya;LIU Xiangdong(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2023年第1期24-32,共9页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省重点研发计划(2121069-J)
浙江省清洁染整技术研究重点实验室开放基金项目(QJRZ2110)
浙江省基础公益研究计划(LGC22E030006)。
关键词
纤维素
丝素蛋白
低共熔溶剂
纳米纤维
湿敏响应
cellulose
silk fibroin
deep eutectic solvents
nanofibers
humidity sensitive response
