金屬有機骨架複合材吸附碘分子氣體和揮發性有機化合物之研究

本論文主要使用金屬有機骨架(Metal-Organic Frameworks,MOFs)與高分子複合進行碘分子氣體和揮發性有機汙染物的吸附移除。論文第一部分首先將多種MOFs進行對氣相中碘分子氣體的吸附，進一步將金屬有機骨架ZIF-8與高分子polyethersulfone (PES)依不同比例混摻製備成的混和基質膜(Mixture-Matrix Membranes, MMMs)去進行碘分子氣體的吸附移除實驗。在性質鑑定上，分別以粉末X-ray繞射(PXRD)鑑定混摻後的混和基質膜與原始的有機金屬骨架其繞射圖譜結構差異，場發射式掃描電子顯微鏡(FE-SEM)進行薄膜表面和側面的觀察，熱失重分析鑑定薄膜的熱穩定性。實驗結果表明，成功製備具有ZIF-8晶相的混和機質膜ZIF-8@PES，且ZIF-8的混摻比高達40%wt，同時擁有1387.6 mg/g碘分子氣體的吸附量，相較於原始ZIF-8粉末提升了接近60%的吸附效果。論文第二部分主要探討熱處理後的MOFs對有機揮發性汙染物的吸附實驗，在400 oC到550 oC的環境下進行MOFs的熱處理後，以粉末X-ray繞射(PXRD)鑑定其結構，並進行粉體對VOCs的吸附實驗。再利用靜電紡絲將MOFs與高分子PAN進行混合後紡絲，將所得之纖維複合材去進行附懸浮顆粒(PM)和有機揮發性汙染物(VOCs)的捕抓研究。實驗結果表明，熱處理後的MOFs在不同的有機揮發性汙染物上有選擇性的吸附效果，例如，ZIF-8進行450 oC的熱處理後對乙酸乙酯(3415.9 mg/g)和四氫呋喃(3398.9 mg/g)有較優異的吸附效果，而進行500 oC的熱處理後則對甲苯(4714.8 mg/g)和乙醇(5147.5 mg/g)有更優異的吸附效果。而纖維複合材吸附方面，Membrane D在吸附0.5m (PM 0.5)懸浮顆粒也高達了99.93%的移除效果，對甲苯和乙醇也有顯著的吸附效果，分別為29181.8 mg/g和12065.8 mg/g。

關鍵字

金屬有機骨架；碘；揮發性有機化合物；複合材

並列摘要

This paper mainly uses Metal-Organic Frameworks (MOFs) for the adsorption of iodine molecular gases and volatile organic compounds. In the first part, a variety of MOFs were firstly adsorbed to the iodine molecular gas in the gas phase, and the metal-organic frameworks ZIF-8 and the polymer polyethersulfone (PES) were mixed in different proportions to prepare a Mixture-Matrix Membranes(MMMs) were used to perform adsorption removal experiments on iodine molecular gas. In the identification of the properties, powder X-ray diffraction (PXRD) was used to identify the difference in the diffraction pattern between the mixture-matrix membranes and the original metal-organic frameworks, and the field-emission scanning electron microscope (FE-SEM) was used for observating the film’s surface and side, thermogravimetric analysis to identify the thermal stability of the film. The experimental results show that the mixture-matrix membrane ZIF-8@PES with ZIF-8 crystal phase is successfully prepared, and the mixing ratio of ZIF-8 is as high as 40%wt, and the adsorption amount of 1387.6 mg/g iodine molecular gas is obtained. Nearly 60% adsorption is improved compared to the original ZIF-8 powder. The second part of the paper is mainly discusses the capture of organic volatile compounds by heat-treated MOFs. After heat treatment of MOFs in the environment of 400 °C to 550 °C, the structure is identified by powder X-ray diffraction (PXRD). The adsorption experiments of powder on VOCs were carried out. The MOFs were mixed with the polymer PAN by electrospinning and then spun. The obtained fiber composites were subjected to the capture of particulate matter (PM) and volatile organic compounds (VOCs). The experimental results show that the heat treatment MOFs have selective adsorption effects on different volatile organic compounds. For example, ZIF-8 is heat treated at 450 oC for ethyl acetate (3415.9mg/g) and tetrahydrofuran (3398.9mg/g) has an excellent adsorption effect, and after heat treatment at 500 oC, it has better adsorption effect on toluene (4714.8 mg/g) and ethanol (5147.5 mg/g). In terms of fiber composite adsorption, Membrane D also adsorbed 0.5m (PM 0.5) remove effusion up to 99.93%, and also had significant adsorption effects on toluene and ethanol, respectively 29181.8 mg/g and 12065.8 mg/ g.