In order to improve the extraction rate and utilization rate of collagen in sheepskin, sheepskin collagen was extracted by acid enzyme compounding method, and collagen-based nanofibers were prepared by electrospinning technology. Taking the extraction rate of sheepskin collagen as the evaluation index, the effects of four factors, namely material-liquid ratio, acetic acid concentration, pepsin concentration and enzymatic hydrolysis time, on the extraction effect of sheepskin collagen were investigated, and the optimal level of single factors was determined. On this basis, the process conditions of sheepskin collagen extraction were optimized by orthogonal experimental design. The effects of enzymatic hydrolysis on the structural properties of collagen were explored by biochemical techniques such as ultraviolet spectrum scanning, infrared spectrum scanning, SDS-PAGE mapping and scanning electron microscopy. Collagen and polylactic acid were then compounded and electrospun to obtain collagen-based nanofibers. The results showed that the best process for extracting sheepskin collagen by acid enzyme compounding method was as follows: Material-liquid ratio of 1:25 g/mL, acetic acid concentration of 1.2 mol/L, pepsin dosage of 1.0%, enzymatic hydrolysis time of 72 h. Under these conditions, the extraction rate of sheepskin collagen was 38.42%±0.49%. Ultraviolet spectroscopy showed that sheepskin collagen had a maximum UV absorption peak around 230 nm. Infrared spectrum scanning and SDS-PAGE map analysis showed that sheepskin collagen was mainly composed of α1, α2 and β three subunit components, which belonged to type I collagen, and the spatial structure of collagen was intact. Scanning electron microscopy showed that the fiber network structure of sheepskin collagen was relatively intact. The collagen-based nanofibers obtained by electrospinning had a diameter of 418.02±183.77 nm, a tensile strength of 3.616±0.386 MPa, and an elongation at break of 8.69%±1.95%, which had excellent physical properties and the potential to be used as a cell scaffold. This study provided a theoretical basis for improving the high-value utilization of sheepskin and sheepskin collagen, and also provided theoretical support for the development of collagen-based nanomedical fiber products.
将精梳大麻与棉纤维通过赛络纺纱方法进行混纺,研究混纺比对精梳大麻/棉混纺纱断裂强度、断裂伸长率、条干、纱疵、毛羽等指标的影响.结果表明:随着大麻纤维占比增大,纱线断裂强度和伸长率总体呈下降趋势,条干不匀率增加,纱线疵点(细节、粗节、麻粒)数量逐渐增多,毛羽增多.综合分析得出,当精梳大麻/棉混纺比为20/80时,混纺纱的综合性能较好.
通过生物还原法制备了杨梅素纳米银粒子,经测定,杨梅素纳米银粒子在近407 nm处存在明显的SPR峰.不同pH值条件下制备的杨梅素纳米银粒子在SPR峰、粒径分布和催化性能方面存在一定差异.随着反应溶液pH值的增大,其SPR峰发生了一定程度的蓝移.当使用杨梅素纳米银粒子催化降解直接紫1染料时,具有较小平均粒径的MP2(pH值为7.013)杨梅素纳米银粒子表现出最佳的催化效率,经过40 min的反应后,直接紫1染料的降解百分率达到82％.
为了纺制高品质聚乙醇酸(PGA)长丝,研究了熔融纺丝工艺路线中全流程纺丝工艺参数,包括泵供量、纺丝速度、热拉伸倍数对PGA长丝力学性能的影响,并结合直径、结晶度、取向度等数据确定了最佳的纺丝工艺.研究了 PGA初生纤维和牵伸纤维的体外降解性能.试验结果表明:当泵供量为22 mL/min,纺丝速度为600 m/min,热拉伸倍数为5.0时,PGA长丝的断裂强度达到6.09 cN/dtex,断裂伸长率为24.26％;纤维的结晶度越高,相同降解时间内质量损失率越小.
产业融合是新时代经济发展的主流趋势之一,产业融合有助于提高相关产业的市场竞争力,推动产业的升级转型并孕育出新的经济增长点,优化产业基础建设,构建高效的产业发展模式,更好的适应旅游与服装消费市场需求变化并催生出新业态.文化旅游产业的综合性等特点为服装产业与文化旅游产业的融合发展打下了基础.服装产业与文化旅游产业的融合为相关产业的发展开启了新道路,通过强化文化旅游产业的带动作用,促进了服装产业的消费多元化.由危华著、浙江大学出版社出版的《我国服装产业国际市场势力构建研究——基于全球价值链视角》一书,阐述深刻、理论丰富,立足全球价值链视角,从国际市场站位对中国服装产业发展开展了系统研究,为服装产业与文化旅游产业的融合发展提供了丰富的研究资料.
