薄膜分離技術(Membrane Technology)

薄膜科技為一種有效的分離技術之一，薄膜分離技術的運用日益增大，相較於傳統的分離程序，薄膜分離程序具有許多優點，包括擁有較高的選擇性、簡易的操作流程、易於放大量產化, 本研究團隊從材料合成, 高分子特性, 薄膜成型技術等三個方面製備薄膜材料, 探討不同薄膜材料特性對於水中汙染物如何進行選擇性分離, 以染劑為例, 本團隊所開發之石墨烯複合薄膜可以有效將98%以上之染料去除, 根據化學結構的不同, 也可將染劑進行選擇性分離, 其選擇特性可達到90%; 而對於重複使用性來說, 石墨烯複合薄膜最多可重複至22次後去除效果才會有明顯下降.

The polymeric membrane is used because of its excellent thermal tolerance and chemical resistance and mixed with nanomaterials like graphene oxide, reduced graphene oxide, sulfonated graphene oxide to fabricate a thin-film composite membrane. We select methylene blue(MB), methyl orange(MO), congo red(CR), and rhodamine B(RhB) for simulated pollutants. GO-membrane can remove 99.04 %, 99.51 %, 98.13 % of MB based on electrostatic attraction and π-π interaction from the benzene. And three types of membrane can recycle used 6 to 14 times. In the case of dyes mixture, methylene blue(MB) and congo red(CR), the efficiency of GO-membrane preserves 97 % for 6 reuse times and the removal capacities are improved from 6.65 to 30.15 mg CR/g GO. The spent membranes can be recycled 22 times. The study and literature investigate the removal efficiency of dyes mixture, higher effect depends on the integrated degree with cation dye and anionic dye when using a material with negative surface charges. The GO-membrane made with simple processes and benefit nanomaterials may provide useful strategies for treatment dyes wastewater and water purification