剪切增稠液的制备及其在涤纶织物中的应用

Preparation of shear thickening fluid and its application in polyester fabrics

文章以直径为12 nm的SiO_2粒子作为分散相,PEG 200作为分散介质,通过机械搅拌和超声振荡的方法分别制备出20%、22%、24%、26%、28%五种质量分数的剪切增稠液(STF)体系。并对纳米SiO_2粒子的外观形貌及团聚情况、STF的稳态流变性能进行了测试,并将STF与涤纶织物复合进行防刺实验。结果表明,纳米SiO_2粒子的团聚现象明显,部分团聚体呈现网状结构;STF的黏度随着剪切速率的增加呈现先变稀、再增稠的现象,表现为非牛顿流体特性;STF的临界黏度随着纳米SiO_2粒子浓度的增加而增加;STF有利于提高涤纶织物的防刺性能。

Nano-SiO2 particles with diameter of 12 nm were used as dispersed phase and PEG 200 was used as the dispersed medium in the paper.Shear thickening fluid(STF)system with mass fraction of 20%,22%,24%,26%and 28%was prepared by mechanical stirring and ultrasonic oscillation.The morphology and agglomeration of nano-SiO 2 particles,and the steady-state rheological properties of STF were tested.Anti-stab test of STF and polyester fabric composite was conducted.The results show that the agglomeration of nano-SiO 2 particles is obvious,and some of the aggregates show network structure.The viscosity of STF firstly thins and then thickens with the increase of shear velocity,which manifests non-Newtonian fluid properties.The critical viscosity of STF increases with the increase in the concentration of nano-SiO 2 particles.STF is beneficial to improve stab-resistant properties of polyester fabrics.