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通过合成折射率与白炭黑相匹配的苯基乙烯基硅油和苯基含氢硅油,以白炭黑补强,固化后获得光学透明的苯基硅橡胶,然后以四甲基己二胺为催化剂,使喷涂在苯基硅橡胶表面的有机聚硅氮烷(OPSZ)实现低温固化及硅质转变,获得具有低气体渗透性的致密涂层,并对涂层的光学性能、透氧量、抗硫化性能进行了测试和表征。结果表明:OPSZ涂层表面连续、均匀、致密,无裂纹和空隙,涂层断面致密均匀,无缝隙和裂纹,当涂层厚度低于32μm时,涂层与硅橡胶间的粘接力良好;固化后的OPSZ显示出优异的透明度、透光性能和气体屏蔽性能;在400~800 nm范围内透光率>92%;当涂层厚度达到12μm以后,透氧量降至1.4 cm~3/m~2,并保持不变,涂覆涂层后的封装灯珠均显示良好的抗硫化能力,硫化后光通量维持率在99.9%以上。当w(四甲基己二胺)>5%,在室温、相对湿度50%条件下放置24 h实现了硅质转化,提高加热温度和相对湿度,可以有效地缩短硅质转化的时间。
By synthesizing phenyl vinyl silicone oil and phenyl hydrogen silicone oil with refractive index matched with white carbon, reinforcing and reinforcing with white carbon, an optically transparent phenyl silicone rubber is obtained, and then tetramethylhexamethylenediamine Catalyst, the organic polysilazane (OPSZ) sprayed on the surface of the phenyl silicone rubber can be cured at low temperature and the siliceous transformation to obtain a dense coating with low gas permeability. The optical properties, oxygen permeability, Vulcanization resistance was tested and characterized. The results show that the surface of OPSZ coating is continuous, uniform, dense, without cracks and voids. The coating has dense and uniform sections with no cracks and cracks. When the coating thickness is less than 32μm, the adhesion between coating and silicone rubber is good. After curing, the OPSZ showed excellent transparency, light transmission and gas barrier properties. The light transmittance was> 92% in the range of 400 to 800 nm. After the coating thickness reached 12 μm, the oxygen permeability decreased to 1.4 cm -3 / m ~ 2, and remained unchanged. The encapsulated lamp beads coated with the coating showed good anti-vulcanization ability, and the luminous flux maintenance rate after vulcanization was above 99.9%. When w (tetramethyl hexamethylenediamine)> 5%, at room temperature, 50% relative humidity for 24 h to achieve the conditions for the conversion of silicon to improve the heating temperature and relative humidity, can effectively shorten the time of silicon conversion.