This article describes the properties of TiO_2-siloxane that can be appliedto spacecraft polymers to protect from AO environmental influences on the life and performance ofspace mission. This protective coating is obt...This article describes the properties of TiO_2-siloxane that can be appliedto spacecraft polymers to protect from AO environmental influences on the life and performance ofspace mission. This protective coating is obtained by mixing TiO_2, siloxane and silicate mineralsvia dispersion and ground. Kaptons with and without TiO_2-siloxane overcoating are exposed to AOimpingement from ground-simulation laboratory. Fourier transform infrared spectroscopy (FTIR) ,LAMBDA-9 spectrophotometer, X-ray photoelectron spectroscopy (XPS) and scanning electronmicroscopy(SEM) are used to characterize the chemical and physical changes on the surfaces of theunprotected Kapton and protected Kapton samples . The application of protective coatings and theirresistance to the space environment are described for ground-based test. From the test results itcan be seen that Kapton is heavily eroded, while there is little change on surface ofTiO_2-siloxane. So it can be concluded that TiO_2-siloxane coatings are highly resistant to AO andthat it is a kind of protective coating for Kapton.展开更多
化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于...化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于光催化降解不同有机污染物显得尤为重要。采用一步无模板溶剂热法合成了核壳结构的C-TiO_(2)复合材料前驱体,并在氩气气氛下煅烧得到高结晶度的C-TiO_(2)复合光催化材料。运用SEM、TEM、XRD和TG等表征手段对材料进行表征,结论如下:550℃煅烧时的样品为包含少量碳的高结晶度的锐钛矿相TiO 2,且550℃煅烧时的样品依然保持了完整的核壳结构。此外,C-TiO_(2)复合材料的比表面积高达85.69 m 2·g^(-1),平均孔径为16.4 nm以及孔体积为0.423 m 3·g^(-1)。在UV-Vis光照射下,C-TiO_(2)复合材料分别对罗丹明B(RhB)、亚甲基蓝(MB)和刚果红(CR)3种染料显示出增强的光催化降解活性。展开更多
文摘This article describes the properties of TiO_2-siloxane that can be appliedto spacecraft polymers to protect from AO environmental influences on the life and performance ofspace mission. This protective coating is obtained by mixing TiO_2, siloxane and silicate mineralsvia dispersion and ground. Kaptons with and without TiO_2-siloxane overcoating are exposed to AOimpingement from ground-simulation laboratory. Fourier transform infrared spectroscopy (FTIR) ,LAMBDA-9 spectrophotometer, X-ray photoelectron spectroscopy (XPS) and scanning electronmicroscopy(SEM) are used to characterize the chemical and physical changes on the surfaces of theunprotected Kapton and protected Kapton samples . The application of protective coatings and theirresistance to the space environment are described for ground-based test. From the test results itcan be seen that Kapton is heavily eroded, while there is little change on surface ofTiO_2-siloxane. So it can be concluded that TiO_2-siloxane coatings are highly resistant to AO andthat it is a kind of protective coating for Kapton.
文摘化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于光催化降解不同有机污染物显得尤为重要。采用一步无模板溶剂热法合成了核壳结构的C-TiO_(2)复合材料前驱体,并在氩气气氛下煅烧得到高结晶度的C-TiO_(2)复合光催化材料。运用SEM、TEM、XRD和TG等表征手段对材料进行表征,结论如下:550℃煅烧时的样品为包含少量碳的高结晶度的锐钛矿相TiO 2,且550℃煅烧时的样品依然保持了完整的核壳结构。此外,C-TiO_(2)复合材料的比表面积高达85.69 m 2·g^(-1),平均孔径为16.4 nm以及孔体积为0.423 m 3·g^(-1)。在UV-Vis光照射下,C-TiO_(2)复合材料分别对罗丹明B(RhB)、亚甲基蓝(MB)和刚果红(CR)3种染料显示出增强的光催化降解活性。
