物质的触变性及触变材料的开发

Thixotropy of Material and Exploitation of Thixotropic Material

触变性是分散体系流变学中一种特殊的现象,是指在搅动或其它机械力作用下,这些体系的粘度或切力随时间发生变化的一种流变现象。研究开发触变性材料,使其在"紧急"外力作用下,通过材料在结构性能上的短时"响应"变化,在紧急制动、减缓冲击、缓降逃生、防弹衣、泥浆固井等需要"瞬变响应"的工程场合加以应用,具有十分重要的意义。对自然界和工程中的触变性物质进行了综合分析,从正触变及负触变两方面介绍了触变材料的研究现状,分析了触变材料的应用领域和应用前景。

Thixotropy is a kind of special phenomenon in dispersion system rheology,which refers to a rheological phenomenon that the viscosity or shear force of these systems change with time under agitation or other mechanical forces.Under the action of“emergency”external force,thixotropic materials produce short-term“response”changes in structure and property,it is of great significance to research and develop thixotropic materials to be applied in engineering applications that require“transient response”,such as emergency braking,shock mitigation,slow-moving escape,body armor,and mud cementing,etc.In this paper,the thixotropic substances in nature and engineering are analyzed.The research status of thixotropic materials is introduced from positive thixotropy and negative thixotropy.At the same time,the application fields and application prospects of thixotropic materials are analyzed.