nmSiO2对聚合物光纤光栅封装材料的改性研究

分析了刚性纳米粒子改性聚合物的原理，重点分析了nmSiO₂/硅氧烷（硅橡胶）复合材料的改性机理,采用120号溶剂性汽油为分散剂，通过共混法制得nmSiO₂—乙烯基硅氧烷、含氢硅氧烷硫化而成的复合材料,用AJ-Ⅲ_a型原子力显微镜分析研究了该材料的组团结构并测试了其力学性能,结果表明，硅氧烷橡胶改性后，材料的弹性模量增加了15.4%；拉伸强度增加了19.4%；扯断伸长率增加了30%,用改性后的硅氧烷聚合物材料封装光纤Bragg光栅(FBG)压力传感器，可有效改善封装材料与光纤光栅的耦联性能；通过粒子含量控制可以增韧增强硅氧烷，从而可制作变量程压力传感器，同时可以延长传感器的使用寿命,

Study on Property Improyement of Polymer Coated Materiat for Opticalfibre Bragg Gratings by Using nmSiO2

The principle of property improvement for polymer by using rigid nanometric particles has been presented,and analysis of property-improving mechanism for polymer material by using nmSiO_2/siloxane(silicone rubber) has been emphasized.Taking solvent gasoline No.120 as dispersing agent,a kind of compounded material has been made through co-mixing method to obtain nmSiO_2-vinyl siloxane with addition of hydrogen-containg siloxane for vulcanizing reaction.The agglomerative structure of the said material has been analyzed and studied by using AJ-Ⅲ_a atom-powered microscope,and its mechanical property has been tested.Results show that the elastic modulus of material has been enhanced by 15.4%,the tensile strength increased by 19.4%,and the specific elongation of breaking increased by 30%after improving property with siloxane rubber.Adopting property-improved siloxane polymer material to coat the optical fibre Bragg grating pressure sensor,the coupling behavior between coated material and optical fibre Bragg grating