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    孔子文, 单宁, 伏阳, 苏毅, 周忠武, 东为富, 张胜文. 基于聚醚胺改性的WPU/MMT纳米复合乳液[J]. 功能高分子学报, 2020, 33(1): 93-97. doi: 10.14133/j.cnki.1008-9357.20181213001
    引用本文: 孔子文, 单宁, 伏阳, 苏毅, 周忠武, 东为富, 张胜文. 基于聚醚胺改性的WPU/MMT纳米复合乳液[J]. 功能高分子学报, 2020, 33(1): 93-97. doi: 10.14133/j.cnki.1008-9357.20181213001
    KONG Ziwen, SHAN Ning, FU Yang, SU Yi, ZHOU Zhongwu, DONG Weifu, ZHANG Shengwen. WPU/MMT Nanocomposite Dispersion Based on Polyetheramine Modification[J]. Journal of Functional Polymers, 2020, 33(1): 93-97. doi: 10.14133/j.cnki.1008-9357.20181213001
    Citation: KONG Ziwen, SHAN Ning, FU Yang, SU Yi, ZHOU Zhongwu, DONG Weifu, ZHANG Shengwen. WPU/MMT Nanocomposite Dispersion Based on Polyetheramine Modification[J]. Journal of Functional Polymers, 2020, 33(1): 93-97. doi: 10.14133/j.cnki.1008-9357.20181213001

    基于聚醚胺改性的WPU/MMT纳米复合乳液

    WPU/MMT Nanocomposite Dispersion Based on Polyetheramine Modification

    • 摘要: 采用聚醚胺(PEA)对蒙脱土(MMT)进行插层改性,通过离子交换制备了聚醚胺改性蒙脱土(PEA-MMT)。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)表征PEA-MMT的化学结构和层间距。通过在水性聚氨酯(WPU)预聚体乳化过程中引入PEA-MMT的方法,制备WPU/PEA-MMT纳米复合乳液,探究了PEA-MMT的引入对WPU的微观形貌、力学性能、吸水性和透氧性的影响。结果表明:PEA-MMT在WPU膜中均匀分散,且呈插层结构;同时PEA-MMT的引入有效提高了WPU的力学性能,降低了WPU的吸水率及透氧率。

       

      Abstract: Polyetheramine modified montmorillonite (PEA-MMT) was prepared by inserting polyetheramine (PEA) into the montmorillonite layers through the way of ion exchange. The chemical structure of PEA-MMT was characterized by Fourier transform infrared spectroscopy (FT-IR). X-ray diffraction (XRD) analysis showed that the basal spacing of PEA-MMT was larger than that of unmodified MMT. The waterborne polyurethane (WPU)/polyetheramine modified montmorillonite (WPU/PEA-MMT) nanocomposite dispersions were prepared by incorporation of the functionalized montmorillonite during the emulsification process of the polyurethane prepolymer. The influence of the addition of PEA-MMT on the WPU properties including micromorphology, mechanical properties, water absorption and oxygen permeability were studied. Scanning electron microscopy (SEM) analysis confirmed that PEA-MMT was homogeneously dispersed in the waterborne polyurethane film. XRD demonstrated that the WPU segment was embedded in the middle of the PAE-MMT sheet, indicating the intercalation structure. Compared with pure WPU, when the mass fraction of PEA-MMT was controlled to be 3%, the tensile strength and Young's modulus were increased from 35 MPa and 13 MPa to 55 MPa and 44 MPa, respectively. Water resistance and oxygen barrier of composite were greatly improved by a synergistic effect of the lamellar structure of montmorillonite and the excellent interfacial interactions between PEA-MMTA nanosheets and WPU. When m(PEA-MMT)∶m (WPU)≥ 3%, the water absorption and oxygen permeability of the nanocomposite films and coatings were reduced by 83% and 24%, respectively.

       

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