Browsing by Author "Hunter, Chakaria"
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Item Ultraviolet (UV) Mitigation of Dimethylsilanediol (DMSD)(48th International Conference on Environmental Systems, 2018-07-08) Delzeit, Lance; Hunter, ChakariaThe presence of dimethylsilanediol (DMSD) within the water supply of the International Space Station (ISS) causes issues with the Water Processing Assembly (WPA). This paper presents the liquid phase mitigation of DMSD produced from dimethoxydimethylsilane under both long and short wavelength ultraviolet (UV) irradiation. The results of this study showed that the DMSD reacted into progressively larger moieties which eventually form large insoluble components which included their attachment to various accessible surfaces. This study will also present the behavior of the methanol under UV exposure and its implications to the International Space Station.Item UV Chemistry and Mitigation of Siloxane(48th International Conference on Environmental Systems, 2018-07-08) Delzeit, Lance; Hunter, ChakariaThe presence of dimethylsilanediol (DMSD) within the water supply of the International Space Station (ISS) causes issues with the Water Processing Assembly (WPA). The DMSD is believed to be a decomposition product of siloxanes which are condensed into the water system with the humidity condensate. This paper presents the ultraviolet (UV) gas phase photochemistry of siloxanes under both long and short wavelength UV radiation, and high energy electron bombardment. The results of this study showed that the siloxanes reacted into progressively larger and more complex moieties which eventually formed large non-volatile components which included their attachment to various accessible surfaces.