凝固浴对再生胶原纤维结构与性能的影响

doi:10.13475/j.fzxb.20210801506

纺织学报 ›› 2022, Vol. 43 ›› Issue (09): 58-63.doi: 10.13475/j.fzxb.20210801506

凝固浴对再生胶原纤维结构与性能的影响

杜璇¹^,², 丁长坤¹^,²(), 岳程飞¹^,², 苏杰梁¹^,², 闫旭焕¹^,², 程博闻³

1.天津工业大学材料科学与工程学院, 天津 300387
2.天津工业大学天津市先进纤维与储能技术重点实验室, 天津 300387
3.天津科技大学, 天津 300457

收稿日期:2021-08-02 修回日期:2022-03-15 出版日期:2022-09-15 发布日期:2022-09-26
通讯作者: 丁长坤
作者简介:杜璇(1997—),女,硕士生。主要研究方向为生物质纤维材料。
基金资助:
天津市教委科研计划项目(2019ZD04);天津市自然科学基金青年项目(18JCQNJC72400)

Effect of coagulation bath on structure and properties of regenerated collagen fibers

DU Xuan¹^,², DING Changkun¹^,²(), YUE Chengfei¹^,², SU Jieliang¹^,², YAN Xuhuan¹^,², CHENG Bowen³

1. School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
2. Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tiangong University, Tianjin 300387, China
3. Tianjin University of Science and Technology, Tianjin 300457, China

Received:2021-08-02 Revised:2022-03-15 Published:2022-09-15 Online:2022-09-26
Contact: DING Changkun

摘要/Abstract

摘要：

为研究胶原(Col)纺丝液在不同凝固浴中的成形机制,分别以丙酮、氯化钠(NaCl)溶液、聚乙二醇(PEG)溶液、磷酸盐缓冲液(PBS)为凝固浴,采用干湿法纺丝技术制备再生胶原纤维,系统研究了凝固条件对纤维微纤结构和力学性能的影响。结果表明:胶原溶液在丙酮凝固浴中具有最快的脱水速度、聚集速度和凝固速度,丙酮-Col纤维的微纤较为细小,排列有序程度高且堆积紧密,断裂强度最高可达1.22 cN/dtex;NaCl溶液、PEG溶液、PBS缓冲液均通过脱除胶原表面的水化层使其析出,且PBS缓冲液因盐的浓度低导致其脱水速度很慢,但PBS-Col纤维的微纤尺寸较大且均一性强,排列较为紧密,强度次之;而NaCl-Col和PEG-Col纤维微纤尺寸亦较大但有一定间隙,排列较为疏松,微纤间相互作用力低,二者强度较低。

关键词: 胶原纤维, 凝固浴, 干湿法纺丝, 微纤, 断裂强度, 成形机制

Abstract:

To understand the forming mechanism of collagen(Col) dopes in different coagulation baths, regenerated collagen fibers were prepared via dry-wet spinning method using acetone, NaCl solution, polyvinyl alcohol(PEG) solution and phosphate buffer saline(PBS) solution as coagulation baths. The effects of coagulation conditions on the fibril structure and mechanical properties of collagen fibers were systematically studied. The results showed that collagen dopes demonstrated the fastest dehydration, aggregation and solidification rates in acetone coagulation bath, and acetone-Col fibers could achieve the tensile strength of up to 1.22 cN/dtex with highly ordered and tightly packed small fibrils. In addition, for NaCl solution, PEG solution and PBS solution, collagen fibers were all precipitated by removing the hydration layers on their surfaces, and PBS solution displayed a very slow dehydration rate because its salt concentration was low. However, the tensile strength of PBS-Col fibers was relatively high as well due to homogeneous tightly arranged fibrils with larger size. Furthermore, NaCl-Col fibers and PEG-Col fibers showed relatively lower tensile strength because of larger fibrils with more loosely package and bigger gaps, leading to lowered intermolecular interactions among fibrils.

Key words: collagen fiber, coagulation bath, dry-wet spinning, fibril, tensile strength, forming mechanism

中图分类号:

TQ342.94

杜璇, 丁长坤, 岳程飞, 苏杰梁, 闫旭焕, 程博闻. 凝固浴对再生胶原纤维结构与性能的影响[J]. 纺织学报, 2022, 43(09): 58-63.

DU Xuan, DING Changkun, YUE Chengfei, SU Jieliang, YAN Xuhuan, CHENG Bowen. Effect of coagulation bath on structure and properties of regenerated collagen fibers[J]. Journal of Textile Research, 2022, 43(09): 58-63.

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凝固浴对再生胶原纤维结构与性能的影响

Effect of coagulation bath on structure and properties of regenerated collagen fibers

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