Improvement of Surface Properties of the Adsorbent by Using Low Temperature Plasma

• Main Authors: Kuei-Sen Chang, 張癸森
• Other Authors: Tsair-Wang Chung
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/76580716718970676507

碩士 === 中原大學 === 化學工程研究所 === 89 === Abstract In this study the porous silica gels were prepared by the sol-gel process. The surface properties of silica gels modified by plasma technology were investigated. The objective of this study was to increase the adsorbent uptake in the adsorption dehumidification processes. The plasma technology is widely used in increase the hydrophilic of polymer films, but it is rare in the literature to deal with silica gel particles. Therefore, this technology was used to modified the surface properties and hydrophilic of silica gels in this study. Plasma treatment is not only damaging the material structure but also changing the surface functionality. This investigation was chosen the inert gas plasma (Ar-plasma) and the highly reactive plasma (O2-plasma) on the surface modification of silica gels. The surface characteristics were analyzed by contact angle, SEM, and BET sorptometer. The dynamic adsorption experiments were used to measure the adsorption uptake of silica gel in this study. Under the operating conditions, the amount moisture adsorption by Ar- and O2- plasma treated silica gels was increased by more than 16% and 18% of that of the untreated one, respectively. From the results of this study, the effect of plasma treated time on the uptake of the silica gels was not significant, since the effect of the plasma modification was very fast.