Tailoring the Affinity of Organosilica Membranes by Introducing Polarizable Ethenylene Bridges and Aqueous Ozone Modification
-
- Rong Xu
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
-
- Masakoto Kanezashi
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
-
- Tomohisa Yoshioka
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
-
- Tetsuji Okuda
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
-
- Joji Ohshita
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
-
- Toshinori Tsuru
- Department of Chemical Engineering, and ‡Department of Applied Chemistry, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
書誌事項
- 公開日
- 2013-06-25
- 資源種別
- journal article
- DOI
-
- 10.1021/am401056a
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
Bis(triethoxysilyl)ethylene (BTESEthy) was used as a novel precursor to develop a microporous organosilica membrane via the sol-gel technique. Water sorption measurements confirmed that ethenylene-bridged BTESEthy networks had a higher affinity for water than that of ethane-bridged organosilica materials. High permeance of CO2 with high CO2/N2 selectivity was explained relative to the strong CO2 adsorption on the network with π-bond electrons. The introduction of polarizable and rigid ethenylene bridges in the network structure led to improved water permeability and high NaCl rejection (98.5%) in reverse osmosis (RO). Moreover, the aqueous ozone modification promoted significant improvement in the water permeability of the membrane. After 60 min of ozone exposure, the water permeability reached 1.1 × 10(-12) m(3)/(m(2) s Pa), which is close to that of a commercial seawater RO membrane. Meanwhile, molecular weight cutoff measurements indicated a gradual increase in the effective pore size with ozone modification, which may present new options for fine-tuning of membrane pore sizes.
収録刊行物
-
- ACS Applied Materials & Interfaces
-
ACS Applied Materials & Interfaces 5 (13), 6147-6154, 2013-06-25
American Chemical Society (ACS)
