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酚醛树脂的改性及其对聚氨酯/金属粘接性能的影响

易玉华 赵欣苗

易玉华, 赵欣苗. 酚醛树脂的改性及其对聚氨酯/金属粘接性能的影响[J]. 复合材料学报, 2023, 40(12): 6610-6618. doi: 10.13801/j.cnki.fhclxb.20230222.009
引用本文: 易玉华, 赵欣苗. 酚醛树脂的改性及其对聚氨酯/金属粘接性能的影响[J]. 复合材料学报, 2023, 40(12): 6610-6618. doi: 10.13801/j.cnki.fhclxb.20230222.009
YI Yuhua, ZHAO Xinmiao. Modification of phenolic resin and its effect on adhesive properties of polyurethane/metal[J]. Acta Materiae Compositae Sinica, 2023, 40(12): 6610-6618. doi: 10.13801/j.cnki.fhclxb.20230222.009
Citation: YI Yuhua, ZHAO Xinmiao. Modification of phenolic resin and its effect on adhesive properties of polyurethane/metal[J]. Acta Materiae Compositae Sinica, 2023, 40(12): 6610-6618. doi: 10.13801/j.cnki.fhclxb.20230222.009

酚醛树脂的改性及其对聚氨酯/金属粘接性能的影响

doi: 10.13801/j.cnki.fhclxb.20230222.009
基金项目: 广州市科技计划项目(202102080477)
详细信息
    通讯作者:

    易玉华,硕士,高级工程师,硕士生导师,研究方向为橡塑改性及其复合材料 E-mail: mmyhyi@scut.edu.cn

  • 中图分类号: TB332

Modification of phenolic resin and its effect on adhesive properties of polyurethane/metal

Funds: Science and Technology Program of Guangzhou (202102080477)
  • 摘要: 为了解决Chemlok218为粘接剂时,室温下聚氨酯(PU)/金属粘接效果差的问题,采用一种高活性的PU改性剂,对Chemlok218中的酚醛树脂(PF)进行改性获得PF@NCO,在Chemlok218涂层与PU间形成一层过渡层, FTIR、TG分析表明:PU改性剂中NCO基团与PF中的羟基反应生成氨基甲酸酯基团。与Chemlok218涂层相比,PF@NCO过渡层表面能提高,与PU相容性增加。当Chemlok218与PU改性剂的质量比为80∶20时,PF@NCO-20的剥离强度达到23.4 kN·m−1,比纯Chemlok218提高了58.1%,整个PU/金属粘接试样无粘接薄弱点及缺陷。为解决室温下PU/金属的粘接强度问题提供借鉴。

     

  • 图  1  聚氨酯(PU)/钢材粘接样条的制备示意图

    Figure  1.  Schematic diagram of the preparation of polyurethane (PU)/steel bonded specimens

    图  2  Chemlok218、Chemlok218-A及PF@NCO的FTIR图谱

    Figure  2.  FTIR spectra of Chemlok218, Chemlok218-A and PF@NCO

    图  3  甲苯二异氰酸酯(TDI)与酚羟基的反应式

    Figure  3.  Reaction formula of toluene diisocyanate (TDI) with phenolic hydroxyl groups

    图  4  TDI与3, 3'-二氯-4, 4'-二氨基二苯甲烷(MOCA)生成脲基的反应式

    Figure  4.  Reaction formula for the formation of urea group between TDI and 3, 3'-dichloro-4, 4'-diaminodiphenylmethane (MOCA)

    图  5  Chemlok218和Chemlok218-A的TG (a) 和DTG (b) 曲线

    Figure  5.  TG (a) and DTG (b) curves of Chemlok218 and Chemlok218-A

    图  6  ((a), (c)) Chemlok218与PU预聚体的接触角;((b), (d)) PF@NCO与PU预聚体的接触角

    Figure  6.  ((a), (c)) Contact angle of Chemlok218 with PU prepolymer; ((b), (d)) Contact angle of PF@NCO with PU prepolymer

    图  7  不同PU改性剂含量的PF@NCO剥离分析图:(a) 剥离曲线;(b) 剥离强度柱状图

    Figure  7.  Peeling analysis diagrams of different PU modifier content PF@NCO peeling curve: (a) Peeling curves; (b) Peel strength bar chart

    图  8  不同PU改性剂含量的PU/金属剥离界面图片

    Figure  8.  Peeling interface pictures of PU/metal with different PU modifier content

    图  9  PU/金属粘接机制示意图

    Figure  9.  Schematic diagram of PU/metal bonding mechanism

    表  1  酚醛树脂(PF)@异氰酸酯基(NCO)的命名

    Table  1.   Naming of phenolic resin (PF)@ isocyanate group (NCO)

    Sample Mass ratio of Chemlok218 :PU
    PF@NCO-0 100∶0
    PF@NCO-10 90∶10
    PF@NCO-20 80∶20
    PF@NCO-30 70∶30
    PF@NCO-40 60∶40
    Note: PU—Polyurethane.
    下载: 导出CSV

    表  2  Chemlok218和PF@NCO的接触角与表面能

    Table  2.   Contact angle and surface energy of Chemlok218 and PF@NCO

    SampleContact angle θ/(°)Surface energy/(mJ·m−2)
    WaterEthylene glycolγS dγS pγS
    Chemlock21870.1(1.2)60.7(1.1) 5.112.918.0
    PF@NCO73.7(0.9)55.0(1.4)13.920.234.1
    Notes: γS, γS d and γS p—Surface energy, non-polar part of surface energy and polar part of surface energy respectively. The data in parentheses refers to the standard deviation.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-01-16
  • 修回日期:  2023-02-09
  • 录用日期:  2023-02-10
  • 网络出版日期:  2023-02-23
  • 刊出日期:  2023-12-01

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