改性六方氮化硼/水性聚氨酯防腐涂料制备与性能
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Preparation and properties of modified Hexagonal boron nitride/waterborne polyurethane anticorrosive coating
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    摘要:

    以聚甘油-10(PG)作为稳定剂,在超声条件下对六方氮化硼(h-BN)进行剥离和改性。通过红外光谱(FT-IR)、热重分析(TG)、原子力显微镜(AFM)和透射电镜(TEM)对PG改性的h-BN纳米片(GB)进行了表征。将制备的PG纳米粒子用作水性聚氨酯(WPU)涂层的防腐填料,制备了GB质量分数分别0,0.5%,1.0%,2.0%的为复合涂层(PU/GB)。考察了不同涂层的水接触角、吸水率、附着力损失、热稳定性和机械性能。最后,通过电化学工作站研究了WPU、PU/GB0.5、 PU/GB1.0 和PU/GB2.0复合涂层在3.5%NaCl水溶液中的腐蚀行为。结果表明,GB纳米粒子可以显著增强水性聚氨酯涂层的耐水性、热稳定性、机械性能和耐腐蚀性能。

    Abstract:

    Polyglycerol-10(PG) was used as stabilizer to simultaneously ex-foliate and functionalize hexagonal boron nitride (h-BN) under ultrasonic condition. The h-BN nanowires functionalized by PG (GB) were characterized by FT-IR, TG, AFM and TEM. The prepared GB was used as the anticorrosive filler of waterborne polyurethane (WPU) coating, and the composite coatings with different amount of GB(0,0.5%,1.0%,2.0%) were prepared. The water contact Angle, water absorption, adhesion loss, thermal and mechanical properties of different coatings were investigated. Finally, the corrosion behaviors of WPU and PU/GB composite coatings in 3.5%NaCl aqueous solution were evaluated by electrochemical workstation. The results show that GB nanoparticles can significantly enhance the water resistance, thermal stability, mechanical properties and corrosion resistance of WPU coatings.

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林家明,刘伟区.改性六方氮化硼/水性聚氨酯防腐涂料制备与性能[J].精细化工,2021,38(10):

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  • 收稿日期:2021-03-25
  • 最后修改日期:2021-07-27
  • 录用日期:2021-07-27
  • 在线发布日期: 2021-09-13
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