有机硅胶受力特性的太赫兹时域光谱表征方法  

Terahertz Time-Domain Spectroscopy Characterization Method for Mechanical Properties of Organic Silicone

作　　者：王也 刘闯[1] 任姣姣 刘涛 张丹丹[1,2] 李丽娟 Wang Ye;Liu Chuang;Ren Jiaojiao;Liu Tao;Zhang Dandan;Li Lijuan(Key Laboratory of Photoelectric Measurement and Optical Information Transmission Technology of Ministry of Education,College of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 528400,Guangdong,China)

机构地区：[1]长春理工大学光电工程学院光电测控与光信息传输技术教育部重点实验室,吉林长春130022 [2]长春理工大学中山研究院,广东中山528400

出　　处：《光学学报》2023年第23期286-293,共8页Acta Optica Sinica

基　　金：吉林省教育厅基金(JJKH20230808KJ);中山市第二批社会公益和基础研究项目(2022B2012);中山市第九批创新科研团队(GXTD2022010)。

摘　　要：为探究有机硅胶黏结剂的受力特性,提出了一种基于太赫兹时域光谱特征进行无损表征的方法,利用太赫兹时域透射光谱对有机硅胶胶膜的应力光学系数进行表征,分别以胶膜折射率及时域光谱相位延迟作为参量开展了实验研究,两种方法获得的应力光学系数均为0.18 MPa^(-1)。利用反射式太赫兹时域光谱系统对不同受力状态下的有机硅胶胶膜进行实验研究,分别给出了胶膜厚度为2 mm和3 mm条件下太赫兹时域光谱延迟时间差与拉应力的变化关系,实验结果与理论规律相一致。研究结果表明,太赫兹时域光谱可有效地对有机硅胶等粘接材料的受力特性进行定量化表征,从而为胶接结构在受力状态下的粘接强度的评估提供一种新的方式。Objective Compared with traditional mechanical connection methods,the glued structure has obvious advantages in terms of high connection efficiency,small stress concentration,wide applicability,and lightweight structure.Silicone adhesive is a high-performance adhesive widely used in aviation,automobiles,electronics,and other industrial fields.It can maintain good bonding strength in high and low temperature environments and has good water resistance,chemical stability and resistance,and corrosion properties.During use,the bonded structure is exposed to environmental external forces,and the interface of the bonded layer will generate internal stresses.Internal and interface stresses may cause debonding defects in the bonded structure,leading to the failure of the entire bonded structure,thus seriously threatening the safety of use.Therefore,for the safe use of adhesive structures,it is of great significance to use non-destructive and accurate methods to conduct research on the mechanical properties of organic silicone.Methods In this article,the terahertz time-domain spectroscopy system was used to study the stress characteristics of silicone adhesives.Terahertz spectrum detection is a non-destructive measurement method that can avoid damage to the sample.Terahertz waves have high time resolution and good penetration in non-metallic materials.Taking organic silicone adhesives as the research target,a transmission terahertz polarization time-domain spectroscopy system was built.By measuring the transmission spectrum of the adhesive film in the terahertz band,the optical response of the adhesive film in the terahertz band under different stress states was analyzed.The stress optical coefficient of the organic silica gel film was calculated using two parameters:the refractive index difference of the organic silica gel and the spectral retardation information.In addition,a reflective terahertz time-domain spectroscopy system was established to analyze the relationship between the stress of the organic silica gel and t

关 键 词：光谱学 太赫兹时域光谱技术 有机硅胶 应力表征 无损检测 

分 类 号：TQ339[化学工程—橡胶工业]