| Summary: | 碩士 === 逢甲大學 === 纖維與複合材料學系 === 105 === In order to reduce the number of layers of Kevlar fabric effectively and to improve the mobility of personnel, we used colloidal silica dispersed in polyethylene glycol to prepare shear thickening fluid that was used in protective armor with effective protective properties. The addition of graphene oxide was discussed in this paper to investigate its impact on the effect of shear fluid properties.
In this study, we investigated the puncture test, falling weight impact test, rheological test and torsion test of colloidal silica in different molecular weight of polyethylene glycol (PEG) impregnated Kevlar KK10 fabric. The falling weight impact test was carried out by using blunt-nosed bullet (9 mm) and pointed bullet (7.62 mm), and hope the test results can be applied to the anti-bullet protection.
The experimental results showed that the fabric impregnated with PEG molecular weight of 200 and 60 wt% of colloidal silica had better puncture resistance than that of non-impregnated fabric by 414%. In the falling weight impact test with blunt-nosed bullet, the absorption energy of the impregnated fabric was increased by 66.87%; whereas the absorption energy of the impregnated fabric with pointed bullet was increased by 126.11%.
The addition of graphene oxide impacted on the shear thickening phenomenon, and enhanced the anti-puncture property of PEG with molecule weight of 600; however, it decreased that of PEG with molecule weight of 200.
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