基于微流控技术的载银螺旋海藻复合纤维的绿色连续制备  

Green continuous preparation of silver-loaded helical alginate composite fibers based on microfluidic technology

作　　者：刘辉灿 殷亚然 王之豪 陈秀芳 张先明[1,3] LIU Huican;YIN Yaran;WANG Zhihao;CHEN Xiufang;ZHANG Xianming(School of Materials Science and Engineering,Zhejiang Sci-tech University,Hangzhou 310018,China;Shaoxing Keqiao Research Institute Co.,Ltd.of Zhejiang Sci-Tech University,Shaoxing 312030,China;Zhejiang Provincial Innovation Center of Advanced Textile Technology,Shaoxing 312030,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018 [2]浙江理工大学绍兴柯桥研究院有限公司,绍兴312030 [3]浙江省现代纺织技术创新中心,绍兴312030

出　　处：《复合材料学报》2024年第12期6725-6736,共12页Acta Materiae Compositae Sinica

基　　金：浙江省“尖兵”“领雁”研发攻关计划项目(2023C01095);国家自然科学基金(22008220);浙江省自然科学基金(LQ21B060009);浙江理工大学绍兴柯桥研究院项目(KYY2022002B)。

摘　　要：提高螺旋海藻纤维抗菌性可保障纤维应用安全及稳定性,然而由于抗菌剂和海藻纤维制备过程中试剂间的相容性等问题难以克服,致使共混纺丝过程步骤繁琐,复合纤维的螺旋形貌和性能难以保证。鉴于此,本文以绿色柠檬酸钠(TSC)作为纳米银粒子(AgNPs)抗菌剂的还原稳定剂和海藻纤维螺旋形貌的成型促进剂,基于微流控技术构建了载银螺旋海藻复合纤维的连续纺丝系统,并对螺旋复合纤维的形貌、力学、热稳定、银元素释放和抑菌等性能进行了表征。结果表明:AgNPs呈球形,粒径较为均一,在4~12 nm之间。在抗菌剂-纤维连续制备下,AgNPs能够均匀分布在纤维内部,且增大AgNPs负载量,不仅有利于增强纤维断裂强度和热稳定性,还促进了螺旋复合纤维形成,使断裂伸长率和弹性显著高于线形复合纤维。当AgNPs负载量大于200 mg/kg时,抗菌率可达99.9%以上,且具有长效、高效的抗菌潜力。本文为抗菌螺旋海藻纤维性能调控提供了理论基础,为复合材料的连续化精准构筑提供了技术指导。In order to enhance the antimicrobial properties of helical fiber and ensure its safety and stability in various applications,it is crucial to address the compatibility issues of preparation reagents between the antibacterial agent and alginate fiber.These compatibility issues often lead to complex blending and spinning processes,which pose challenges in achieving the desired helical morphology and performance of the composite fibers.To overcome these challenges,this study utilizes environmentally friendly sodium citrate(TSC) as the reducer and stabilizer for silver nanoparticles(AgNPs) antimicrobial agents and meanwhile a shaping promoter for the helical morphology of alginate fiber.A continuous spinning system for silver-loaded helical alginate composite fiber was established using microfluidic technology.The morphology,mechanical properties,thermal stability,release of silver,and antibacterial properties of the helical composite fibers were characterized.The results show that AgNPs have a spherical shape with a uniform particle size ranging from 4 nm to 12 nm,and can be evenly distributed inside the fiber during the continuous spinning.Additionally,increasing the loading amount of AgNPs not only can enhance the fracture strength and thermal stability,but also promote the formation of helical composite fibers,resulting in significantly higher elongation at break and elasticity compared to linear composite fibers.When the loading of AgNPs is greater than 200 mg/kg,the antibacterial rate can reach over 99.9%,and it has longlasting,efficient antimicrobial potential.This study provides a theoretical basis for the performance regulation of antimicrobial alginate fibers and technical guidance for the continuous and precise construction of composite materials.

关 键 词：微流控 海藻酸钠 纳米银 柠檬酸钠 抗菌活性 

分 类 号：TB333[一般工业技术—材料科学与工程]