改性六方氮化硼/水性聚氨酯涂料的制备与性能  

Preparation and properties of modified hexagonal boron nitride/waterborne polyurethane coatings

作　　者：林家明 刘伟区[1,5] 梁利岩 谭立钦[1,2,3,4,5] LIN Jiaming;LIU Weiqu;LIANG Liyan;TAN Liqin(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,Guangdong,China;Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics,Guangzhou 510650,Guangdong,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,Guangdong,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Shaoguan 512400,Guangdong,China;University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]广东省电子有机聚合物材料重点实验室,广东广州510650 [3]中国科学院新型特种精细化学品工程实验室,广东广州510650 [4]国科广化韶关新材料研究院,广东韶关512400 [5]中国科学院大学,北京101408

出　　处：《精细化工》2021年第10期2132-2140,共9页Fine Chemicals

摘　　要：以聚甘油-10(PG)作为稳定剂,超声下对六方氮化硼(h-BN)进行剥离和改性制得PG功能化的少层h-BN纳米粒子(GB)。利用GB与水性聚氨酯(WPU)共混得到WPU/GB。通过FTIR、TG、AFM和TEM对GB进行了表征,证实了少层GB的成功制备。动电位极化和电化学阻抗谱测试表明,WPU/GB涂层比纯WPU涂层具有更高的耐腐蚀性能。GB含量为1.0%(以WPU的质量为基准,下同)的WPU/GB1.0复合涂层的耐腐蚀性能最好,极化电阻为1.33×10^(7)Ω·cm^(2),阻抗|Z|可达到5.37×10^(7)Ω·cm^(2)。此外,与纯WPU相比,WPU/GB1.0腐蚀电流密度从2.64×10^(–8)A/cm^(2)减小至3.32×10^(–9)A/cm^(2),腐蚀电压从–0.309V增大到–0.037V,保护效率高达98.74%。Hexagonal boron nitride(h-BN) was stripped and modified under ultrasound using polyglycerol-10(PG) as stabilizer to prepare PG functionalized h-BN nanoparticles(GB). WPU/GB coating was prepared by blending GB with waterborne polyurethane(WPU). GB was characterized by FTIR, TG, AFM and TEM. The results showed that GB with few layers was successfully prepared. Tafel polarization and electrochemical impedance spectroscopy tests indicated that the corrosion resistance of WPU/GB coatings was higher than that of pure WPU coating. WPU/GB1.0(GB content was 1.0%, based on the mass of WPU,the same below) composite coating had the best corrosion resistance, and the polarization resistance was 1.33×10^(7) Ω·cm^(2), impedance |Z| could reach 5.37×10^(7) Ω·cm^(2). In addition, compared with those of pure WPU,the corrosion current density of WPU/GB1.0 decreased from 2.64×10^(–8)A/cm^(2) to 3.32×10^(–9)A/cm^(2), the corrosion potential increased from –0.309 V to –0.037 V, and the protection efficiency was as high as 98.74%.

关 键 词：六方氮化硼 水性聚氨酯涂料 防腐 建筑用化学品 

分 类 号：TU561.67[建筑科学—建筑技术科学]