化工进展 ›› 2022, Vol. 41 ›› Issue (6): 3194-3202.DOI: 10.16085/j.issn.1000-6613.2021-1404

• 材料科学与技术 • 上一篇    下一篇

改性h-BN/聚氨酯丙烯酸酯涂料的制备与性能

李博申1(), 魏铭1(), 胡瑶瑶1, 董月林2(), 董群锋2, 杨立峰2   

  1. 1.武汉理工大学化学化工与生命科学学院,湖北 武汉 430070
    2.浙江天女集团制漆有限公司,浙江 桐乡 314500
  • 收稿日期:2021-07-02 修回日期:2021-08-04 出版日期:2022-06-10 发布日期:2022-06-21
  • 通讯作者: 魏铭,董月林
  • 作者简介:李博申(1997—),男,硕士研究生,研究方向为金属腐蚀防护。E-mail:347688960@qq.com

Preparation and performance of modified h-BN/polyurethane acrylic coatings

LI Boshen1(), WEI Ming1(), HU Yaoyao1, DONG Yuelin2(), DONG Qunfeng2, YANG Lifeng2   

  1. 1.School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, Hubei, China
    2.Zhejiang Tiannv Group Paint Co. , Ltd. , Tongxiang 314500, Zhejiang, China
  • Received:2021-07-02 Revised:2021-08-04 Online:2022-06-10 Published:2022-06-21
  • Contact: WEI Ming,DONG Yuelin

摘要:

利用水热法制备羟基化六方氮化硼(BNNSs),采用异佛尔酮二异氰酸酯(IPDI)和丙烯酸羟乙酯(HEA)在其表面进行接枝得到功能化六方氮化硼(Fh-BN)。然后将得到的Fh-BN掺入有机硅改性的聚氨酯丙烯酸酯(PUA)涂料中,成功制备出改性h-BN/聚氨酯丙烯酸酯涂料。研究了水热时间、温度对BNNSs硼羟基含量的影响,利用XPS分析得出水热反应最佳反应条件为180℃、12h,B—OH质量分数达到5.97%。通过机械性能、综合热分析、耐水性、涂层交流阻抗和Tafel极化曲线进行测试分析,掺杂0.75%Fh-BN涂膜硬度达到3H,耐冲击性50cm,柔韧性0.5mm;与未掺杂前涂层相比,吸水率降低4.96%;涂层耐热性提高,T50%提升了6℃;耐水测试浸泡168h后涂膜无变化;电化学测试表明:0.75%Fh-BN涂层阻抗R1达到1.818×109Ω·cm2,比原有涂层提升了两个数量级,Ecorr由-0.4886V正移至-0.32124V,Icorr由2.5552×10-7A/cm2降低至1.5555×10-8A/cm2。Fh-BN的引入显著提升了涂层的机械性能、热稳定性和耐腐蚀性。

关键词: 六方氮化硼, 聚氨酯丙烯酸酯, 腐蚀, 涂层

Abstract:

In this paper, hydroxylated hexagonal boron nitride (BNNSs) was prepared by hydrothermal method. The functionalized hexagonal boron nitride (Fh-BN) was obtained by grafting isophorone diisocyanate (IPDI) and hydroxyethyl acrylate (HEA) on the surface of BNNSs. The resulting Fh-BN was adding into the PUA coating and the modified Fh-BN/polyurethane acrylic coating was successfully prepared. The effect of time and temperature on BNNSs B—OH content was studied respectively, and the B-OH content was 5.97% in the optimal hydrothermal reaction of 180℃ for 12h. The modified Fh-BN/polyurethane acrylic coating was evaluated by mechanical performance test, water resistance, coating impedance and Tafel polarization curve test. When 0.75% Fh-BN was added to the coating, the hardness reached 3H with the flexibility of 0.5mm and the impact resistance of 50cm. The water absorption of coating reduced by 4.96%, Fh-BN improved heat resistance with T50% arising 6℃ and Immersion without change in water 168h, while Ecorr shifted positively from -0.4886V to -0.32124V and Icorr decreased from 2.5552×10-7A/cm2 to 1.5555×10-8A/cm2. The mechanical properties, water resistance and corrosion resistance of the coating were significantly improved by Fh-BN.

Key words: hexagonal boron nitride, polyurethane acrylate, corrosion, coating

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