http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Purwanto, Mochammad,Widiastuti, Nurul,Gunawan, Adrian Materials Research Society of Korea 2021 한국재료학회지 Vol.31 No.7
Chitosan powder is synthesized by a deasetylation process of chitin, obtained from processing of dried shrimp shell powder. Subsequently, chitosan (CS) membranes filled by montmorillonite (MMT) particles and phosphotungstic acid are prepared, and characterized by FT-IR and SEM. The morphology, obtained by SEM for the composite membrane, showed that MMT filler is successfully incorporated and relatively well dispersed in the chitosan polymer matrix. Water and methanol uptake for the CS/MMT composite membranes decrease with increasing MMT loadings, but IEC value increases. In all prepared CS/MMT composite membranes, the CS membrane filled by 5 wt% MMT particles exhibits the best proton conductivity, while that with 10 wt% MMT loading exhibits the lowest methanol permeability; these values are 2.67 mS·cm<sup>-1</sup> and 3.40 × 10<sup>-7</sup> cm<sup>2</sup>·s<sup>-1</sup>, respectively. The best membrane selectivity is shown in the CS/MMT10 composite membrane; this shows that 10 wt% filled MMT is the optimum loading to improve the performance of the chitosan composite membrane. These characteristics make the developed chitosan composite membranes a promising electrolyte for direct methanol fuel cell (DMFC) application.
Badrut Tamam Ibnu Ali,Cininta Nareswari,Triyanda Gunawan,Nurul Widiastuti,Yuly Kusumawati,Juhana Jaafar,Hens Saputra,Dety Oktavia Sulistiono 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Polyethylene terephthalate (PET) is a widely used polymer in packaging products, leading to the daily disposalof millions of PET bottles as waste. 1.1 to 8.8 million tonnes of plastic waste enter the sea each year. The environmental challenge of non-biodegradable PET waste can be addressed by utilizing it as a thinlayermembrane for gas separation. This study modified the PET membrane by blending it with Pebaxpolymer and adding zeolite as a filler to enhance its performance. Characterization techniques, includingFTIR, SEM, TGA, tensile strength testing, and contact angle measurements, were performed on all modifiedmembranes. The membranes were prepared using phase inversion via immersion precipitation. Theresults showed that the PET waste membrane had a denser surface pore morphology and asymmetricalcross-sectional pores than other membranes. Adding Pebax and zeolite resulted in a more regularsponge-like pore structure. The PET, PET-Pebax, and PET-Zeolite NaY-Pebax membranes exhibited hydrophilicproperties, as indicated by contact angle values ranging from 48-78. Regarding CO2/CH4 separation,the 9% PET-Pebax membrane had the highest CO2 permeability, a 21% increase from the originalPET waste membrane. Adding zeolite to the 9% PET-Pebax membrane increased CO2 permeability to1044%.