纺织学报 ›› 2020, Vol. 41 ›› Issue (10): 7-13.doi: 10.13475/j.fzxb.20200202707

• 纤维材料 • 上一篇    下一篇

聚乙烯醇/磷虾蛋白纤维的氢键作用机制及其性能

管福成, 郭静, 吕丽华(), 谭倩, 宋敬星, 张欣   

  1. 大连工业大学 纺织与材料工程学院, 辽宁 大连 116034
  • 收稿日期:2020-02-13 修回日期:2020-07-17 出版日期:2020-10-15 发布日期:2020-10-27
  • 通讯作者: 吕丽华
  • 作者简介:管福成(1983—),男,工程师,博士。主要研究方向为功能纤维。
  • 基金资助:
    国家自然科学基金项目(51773024)

Hydrogen bonding mechanism and properties of polyvinyl alcohol/krill protein fibers

GUAN Fucheng, GUO Jing, LÜ Lihua(), TAN Qian, SONG Jingxing, ZHANG Xin   

  1. College of Textile and Material Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, China
  • Received:2020-02-13 Revised:2020-07-17 Online:2020-10-15 Published:2020-10-27
  • Contact: Lü Lihua

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摘要：

为解决聚乙烯醇(PVA)难以热塑加工和功能单一的问题,以磷虾蛋白(AKP)和水为增塑剂,通过熔体纺丝制备了PVA/AKP纤维。通过红外光谱仪表征了PVA/AKP纤维中的氢键作用,并分析氢键作用机制。借助X射线衍射仪、扫描电子显微镜、差示扫描量热仪和单纤维强力仪等分析了PVA/AKP纤维的结晶性、形态结构、热性能和力学性能等。结果表明:随着AKP质量分数的增加,PVA/AKP纤维中分子内氢键含量和结晶度呈先增大后减小趋势,当AKP质量分数为2%时,PVA/AKP纤维中分子内氢键含量达到最大值(85.37%),结晶度也达到最大值(48%),该条件下纤维断裂强度达到最大值,为2.15 cN/dtex;AKP的加入有助于提高PVA纤维的表面光滑性,PVA/AKP纤维断面呈规则圆形;PVA/AKP纤维对碱溶液的响应性更强,在水中浸渍2 h后纤维吸水率恒定在36%。

关键词: 聚乙烯醇/磷虾蛋白纤维, 熔体纺丝, 氢键作用机制, 结晶性

Abstract:

To solve the difficult thermoplastic processing and single function of polyvinyl alcohol(PVA), krill protein(AKP) and water were used as plasticizers to prepare PVA/AKP fibers by melt spinning. The hydrogen bonding in PVA/AKP fiber was characterized by infrared spectrometer, and the mechanism of hydrogen bonding was analyzed. Additionally, the crystallinity, morphology, thermal properties and mechanical properties of PVA/AKP fibers were characterized by X-ray diffractometer, scanning electron microscope, differential scanning calorimeter and single fiber strength tester, respectively. The results show that with the increase of AKP mass fraction, the content of intramolecular hydrogen bond and crystallinity of PVA/AKP fibers firstly increases and then decreases. When the mass fraction of AKP is 2%, the content of intramolecular hydrogen bond in PVA/AKP fibers reaches the maximum value (85.37%), and the crystallinity also reaches the maximum value (48%), and the fiber breakage strength reaches a maximum of 2.15 cN/dtex. AKP is helpful to improve the surface smoothness of the fiber, the fiber cross section presents regular round. Additionally, PVA/AKP fibers are more responsive to alkaline solutions, and the water absorption rate of the fiber is a constant of 36% after 2 h.

Key words: polyvinyl alcohol/krill protein fiber, melt spinning, hydrogen bond action mechanism, crystallinity

中图分类号: 

  • TS151

图1

PVA、PVA/AKP纺丝工艺流程图"

图2

AKP、PVA、PVA/AKP及不同AKP质量分数PVA/AKP的红外光谱图"

图3

PVA/AKP纤维氢键作用机制"

图4

不同AKP质量分数的PVA/AKP纤维的红外光谱高斯拟合分峰图"

表1

各种氢键类型的拟合结果"

AKP质
量分数/%		 氢键
类型		 氢键表
达式		 波数/
cm-1		 平均峰
面积		 相对强
度/%
自由羟基 —OH 3 575 2.17 8.32
1 分子内氢键 OH…OH 3 428 28.65 75.30
分子间氢键 OH…N 3 126 6.23 16.38
自由羟基 —OH 3 575 0.55 1.23
2 分子内氢键 OH…OH 3 428 37.61 85.37
分子间氢键 OH…N 3 126 5.90 12.39
自由羟基 —OH 3 575 10.96 26.92
3 分子内氢键 OH…OH 3 428 24.76 60.82
分子间氢键 OH…N 3 126 4.99 12.25
自由羟基 —OH 3 575 10.58 30.93
4 分子内氢键 OH…OH 3 428 26.14 58.80
分子间氢键 OH…N 3 126 5.53 10.27

图5

AKP、PVA、PVA/AKP及不同AKP质量分数PVA/AKP的XRD曲线"

图6

不同AKP质量分数PVA/AKP纤维的断裂强度"

图7

不同AKP质量分数PVA/AKP纤维的DSC曲线"

图8

不同AKP质量分数PVA/AKP纤维表面扫描电镜照片(×1 000)"

图9

PVA/AKP纤维表面成形机制"

图10

不同AKP质量分数PVA/AKP纤维断面扫描电镜照片(×200)"

图11

不同pH值下PVA/AKP纤维的溶胀情况"

图12

PVA/AKP纤维在不同时间下的吸水率"

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