纺织学报 ›› 2022, Vol. 43 ›› Issue (03): 44-49.doi: 10.13475/j.fzxb.20210310006

• 纤维材料 • 上一篇    下一篇

导热结构对聚对苯二甲酸乙二醇酯非等温结晶行为的影响

徐晓彤1, 江振林1,2,3(), 郑钦超1, 朱科宇1, 王朝生3, 柯福佑3   

  1. 1.上海工程技术大学 化学化工学院, 上海 201620
    2.上海工程技术大学 微纳制造先进材料研究中心, 上海 201620
    3.东华大学 高性能纤维及制品教育部重点实验室, 上海 201620
  • 收稿日期:2021-03-29 修回日期:2021-10-21 出版日期:2022-03-15 发布日期:2022-03-29
  • 通讯作者: 江振林
  • 作者简介:徐晓彤(1994—),女,硕士生。主要研究方向为环境友好高分子材料。
  • 基金资助:
    上海市“扬帆计划”人才项目(19YF1417800)

Effect of thermal conductive structure on non-isothermal crystallization behavior of polyethylene terephthalate

XU Xiaotong1, JIANG Zhenlin1,2,3(), ZHENG Qinchao1, ZHU Keyu1, WANG Chaosheng3, KE Fuyou3   

  1. 1. School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
    2. Research Center for Advanced Mirco-and Nano-Fabrication Materials, Shanghai University of Engineering Science, Shanghai 201620, China
    3. Key Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2021-03-29 Revised:2021-10-21 Published:2022-03-15 Online:2022-03-29
  • Contact: JIANG Zhenlin

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摘要：

针对聚对苯二甲酸乙二醇酯(PET)中的导热结构会影响纤维材料加工成形、纺织品加工过程以及纤维性能的问题,通过熔融共混法分别制备得到含有碳纳米管、石墨烯的PET复合材料,借助差示扫描量热仪对PET的非等温结晶动力学进行研究。结果表明:掺杂的碳纳米管、石墨烯在PET中起成核剂作用,其质量分数的增加对PET的结晶温度、结晶速率及结晶度具有促进作用;由Kissinger方程计算得到的纯PET和掺杂碳纳米管、石墨烯的PET复合材料的结晶活化能分别为-95.23、-160.27和-176.79 kJ/mol,结晶活化能的绝对值增加促进大分子分子链运动而使结晶过程放热加快;碳纳米管、石墨烯对PET的结晶速率、成核具有促进作用,其中石墨烯的二维片状导热结构对PET的结晶更有利。

关键词: 聚对苯二甲酸乙二醇酯, 石墨烯, 碳纳米管, 非等温结晶动力学, 导热结构

Abstract:

The thermal conductive structure in polyethylene terephthalate will affect the processability of fiber materials and textiles, and various properties of the fiber. Polyethylene terephthalate (PET) composite containing carbon nanotubes (CNTs) and graphene (GR) was prepared by fusion mixing, and the non-isothermal crystallization kinetics of PET was studied by differential scanning calorimetry. The results show that doped carbon nanotubes and graphene act as nucleators in PET, and the increase in their mass fraction promotes the crystallization temperature, crystallization rate and crystallinity. The crystalline activation energies of pure PET, PETs doped with carbon nanotubes and graphene were -95.23、-160.27 and -176. 79 kJ/mol, respectively, calculated using Kissinger method. The increase of the absolute value of crystallization activation energy promotes the movement of macromolecule chain and accelerates the exothermic process of crystallization. The results show that CNTs and GR promote the crystallization rate and nucleation of PET, and the 2-D sheet thermal conductivity of graphene favors PET crystallization.

Key words: polyethylene terephthalate, graphene, carbon nanotube, non-isothermal crystallization kinetics, thermal conductive structure

中图分类号: 

  • TQ342

图1

PET、PET/CNTs和PET/GR的非等温结晶DSC曲线"

表1

PET、PET/CNTs和PET/GR的非等温结晶参数"

样品名称 Φ/(℃·min-1) T0/℃ Te/℃ Tp/℃ t/min t1/2/min ΔHc/(J·g-1)
PET 10 206.29 178.71 196.29 28.12 24.12 44.88
20 197.66 159.33 183.35 23.04 21.20 41.66
30 192.28 142.29 174.27 21.44 19.45 42.20
PET/CNTs 10 212.55 193.47 205.76 26.51 23.13 44.40
20 204.54 177.06 195.57 22.33 19.61 42.70
30 202.20 173.73 193.26 19.11 18.38 44.00
PET/GR 10 209.21 188.29 202.64 26.23 23.09 44.28
20 202.75 179.17 195.10 21.67 19.64 44.97
30 198.66 173.47 190.70 19.86 18.52 44.83

图2

相对结晶度与温度的关系曲线"

图3

相对结晶度与时间的关系曲线"

图4

PET、PET/CNTs和PET/GR在不同温度下的Ozawa指数m和lgK(T)曲线"

图5

PET,PET/CNTs和PET/GR的非等温结晶活化能"

表2

不同添加量的CNTs/PET、GR/PET结晶活化能"

质量分数/% ΔE/(kJ·mol-1)
PET/CNTs PET/GR
0.25 -160.27 -176.79
1.00 -133.11 -187.32
2.00 -127.80 -132.65
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