摘要
目的 研究羟基化氮化硼对涂料性能的影响,以提升用于电子元器件涂料的导热和阻燃性能。方法 采用超声液相剥离法,以氮化硼(BN)为导热/阻燃基元,以去离子水为溶剂,在碱性条件下制备了羟基化氮化硼纳米片(BN-OH),辅以水性聚氨酯、多异氰酸酯及相关溶剂和助剂研制了兼具导热和阻燃功能的水性涂料。利用扫描电子显微镜(SEM)和投射电子显微镜(TEM)分别观测了BN和BN-OH的微观形貌,采用傅里叶红外光谱仪(FT-IR)表征了BN和BN-OH的化学结构,使用X射线衍射仪(XRD)和激光拉曼光谱仪(Raman)测试了BN和BN-OH的晶型和晶貌。涂布打样后,测试了涂料的黏度、细度、外观、硬度和附着力等基本性能,研究了羟基化氮化硼对涂料导热和阻燃性能的影响。使用热重红外联用仪(TG-IR)分析了涂料燃烧过程的气体排放,并观测了燃烧物的形貌。结果 羟基化氮化硼能有效提高水性涂料的导热和阻燃能力。当BN-OH占涂料甲组分总质量的3.0%时,涂料的导热系数提升至0.546 W/(m·K),比空白样提升了2.8倍;同时,涂料的峰值热释放速率(PHRR)比空白样下降了35.0%。BN-OH可显著降低涂料燃烧过程中有害气体的排放,使燃烧后的炭层更加致密紧凑。结论 羟基化氮化硼可同时赋予涂料优异的导热和阻燃性能,极大地提升了其在电器热管理领域的应用,将为电子元器件的安全保障提供更有效的解决策略。
The work aims to investigate the influence of hydroxylated boron nitride(BN-OH)on the performance of coatings to enhance their thermal conductivity and flame retardancy when used in electronic components coatings.The sonochemical liquid phase exfoliation was used to prepare BN-OH nanoflakes under the alkaline conditions with BN as the thermal/flame retardant element and deionized water as the solvent.A water-based polyurethane,polyisocyanate,and related solvents as well as additives were used to develop a water-based coating with both thermal conductivity and flame retardancy.The microscopic morphologies of BN and BN-OH were observed by scanning electron microscopy(SEM)and transmission electron microscopy(TEM),the chemical structures of BN and BN-OH were characterized by a Fourier transform infrared spectrometer(FT-IR),the crystal structure and morphology of BN and BN-OH were tested using X-ray diffraction(XRD)and Raman spectroscopy,respectively.After coating formulation,the basic properties such as viscosity,fineness,appearance,hardness and adhesion were tested,and the influence of BN-OH on the thermal conductivity and flame retardancy of the coating was studied.The gas emissions of the coating combustion process were analyzed with a thermal gravimetric infrared(TG-IR)instrument,and the morphology of the combustion residue was observed.Hydroxylated boron nitride(BN-OH)could effectively improve the thermal conductivity and flame retardancy of water-based coatings.When the mass fraction of BN-OH in the component A of coating was 3.0%,the thermal conductivity of the coating layer was increased to 0.546 W/(m·K),which was 2.8 times higher than that of the blank sample;Meanwhile,the peak heat release rate(PHRR)of the coating layer were respectively reduced by 35.0% compared with the blank sample.BN-OH could significantly reduce the emission of harmful gases during the combustion of the coating,making the char layer after combustion more compact.Hydroxylated boron nitride can endow coatings with excellent thermal conductivity and flame retardancy,greatly enhancing their application in the field of electrical thermal management,and providing more effective solutions for ensuring safety of electronic components.
作者
官燕燕
叶义成
陈海生
屈贞财
GUAN Yanyan;YE Yicheng;CHEN Haisheng;QU Zhencai(Zhongshan Torch Polytechnic,Guangdong Zhongshan 528436,China;Shenzhen Lianteng New Material Technology Co.,Ltd.,Guangdong Shenzhen 516107,China;Heshan Vocational and Technical School,Guangdong Jiangmen 529700,China)
出处
《包装工程》
北大核心
2025年第3期41-49,共9页
Packaging Engineering
基金
广东省高校重点领域专项(2022ZDZX1075)
广东省高校重点领域专项项目(2023ZDZX3100)。
关键词
羟基化氮化硼
导热
阻燃
涂料
元器件
热管理
hydroxylated boron nitride
heat conduction
flame retardancy
coating
electronic component
thermal management
