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Fabrication of fluoroalkylsilane/zeolitic imidazolate framework composites for highly efficient superhydrophobic coating

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Carbon Resources Conversion 2022年第1期5卷 26-34页

作者： Preyaphan Kheaw-in Chanatip Samart Narong Chanlek Phakkhananan Pakawanit Prasert Reubroycharoen Guoqing Guan suwadee kongparakul Suda Kiatkamjornwong Department of Chemistry Faculty of Science and TechnologyThammasat UniversityPathumthani 12120Thailand Bioenergy and Biochemical Refinery Technology Program Faculty of Science and TechnologyThammasat University12120Thailand Synchrotron Light Research Institute(Public Organization) 111 University AvenueMuang DistrictNakhon Ratchasima 30000Thailand Department of Chemical Technology Faculty of ScienceChulalongkorn University254 Phyathai RoadWangmaiPatumwanBangkok 10330Thailand Institute of Regional Innovation Hirosaki UniversityAomori 030-0813Japan Office of University Research Affairs Chulalongkorn University254 Phyathai RoadWangmaiPatumwanBangkok 10330Thailand FRST Academy of ScienceOffice of the Royal SocietySanam Suea PaKhet DusitBangkok 10300Thailand

Superhydrophobic bagasse paper was successfully engineered by facile spray coating with a zeolitic imidazolate framework composite modified by 3,3,3-trifluoropropyltrimethoxysilane(FAS)and used as a filter membrane with special wettability for oil/water *** characteristics such as surface morphology,surface moieties,roughness,and wettability were *** addition of FAS decreased the apparent surface energy between solid surfaces and liquids with a polar contribution of surface free energy as low as 0 mN m−*** formation of the FAS layer was confirmed by transmission electron microscopy and X-ray photoelectron spectroscopy core-level ***-dimensional surface topography revealed an increase in the spray coating cycle that enhanced the hydrophobicity of the coated *** results confirmed that not only microstructures but also the presence of functional groups with low surface energy(such as FAS)can promote surface *** spray-coated paper with FAS/ZIF in the presence of a small amount of nanocellulose provided a superhydrophobic surface after the first spray *** separation efficiency was up to 85%and was slightly affected by oil ***,this can be used as a filter membrane for water-in-oil *** the present work,simple spray-coated paper is a promising candidate material for gravity-driven oil/water separation and water repellent coating.

关键词： Superhydrophobic surface Spray-coating Zeolitic imidazolate framework Oil/water separation

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Glycerol valorization through production of di-glyceryl butyl ether with sulfonic acid functionalized KIT-6 catalyst

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Carbon Resources Conversion 2020年第1期3卷 182-189页

作者： Thi Tuong Vi Tran Maytinee Obpirompoo suwadee kongparakul Surachai Karnjanakom Prasert Reubroycharoen Guoqing Guan Narong Chanlek Chanatip Samart Department of Chemistry Faculty of Science and TechnologyThammasat UniversityPathumthani 12120Thailand Thammasat University Research Unit in Bioenergy and Catalysis(BCRU) Thammasat UniversityPathumtani 12120Thailand Department of Chemistry Faculty of ScienceRangsit UniversityPathumthani 12000Thailand Department of Chemical Technology Faculty of ScienceChulalongkorn UniversityBangkok 10330Thailand Institute of Regional Innovation Hirosaki UniversityAomori 030-0813Japan Synchrotron Light Research Institute(SLRI) 111 University AvenueMuang DistrictNakhon Ratchasima 30000Thailand

In this work,the etherification of glycerol with n-butanol catalyzed by sulfonic acid functionalized on KIT-6 mesoporous silica(SO_(3)H-KIT-6)was investigated for the production of valuable fuel *** SO_(3)H-KIT-6 catalyst was synthesized by co-condensation with different molar ratios of tetraethoxysilane and 3-mercaptopropyl(methyl)di-methoxy *** etherification reaction was systematically examined to determine the optimal reaction temperature,reaction time,catalyst loading,and glycerol to n-butanol ratio under autogenous *** maximum glycerol conversion and di-glyceryl n-butyl ether(di-GNBE)selectivity were 59.09 and 51.50%,respectively,when the SO_(3)H-KIT-6 catalyst with the highest acidity was ***,the presence of a methyl group on the catalyst surface prevented glycerol adsorption during the reaction process,leading to the inhibition of undesired product *** SO_(3)H-KIT-6 catalyst could be reused up to three times,with only a 13%decrease in glycerol conversion being ***,the superior performance of the SO_(3)H-KIT-6 catalyst for di-GNBE production was also demonstrated compared with conventional solid acid catalysts including HZSM-5,H-beta zeolite,Amberlyst-35,and Amberlyst-36.

关键词： Etherification Glycerol SO_(3)H-KIT-6 catalyst Valuable fuel additive di-GNBEs

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Utilization of fruit waste for H_(2)-rich syngas production via steam co-gasification with brown coal

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Carbon Resources Conversion 2023年第4期6卷 315-325页

作者： Aisikaer Anniwaer Nichaboon Chaihad Aghietyas Choirun Az Zahra Irwan Kurnia Yutaka Kasai suwadee kongparakul Chanatip Samart Katsuki Kusakabe Abuliti Abudula Guoqing Guan Graduate School of Science and Technology Hirosaki University1-BunkyochoHirosaki 036-8560Japan Energy Conversion Engineering Laboratory Institute of Regional InnovationHirosaki University3-BunkyochoHirosaki 036-8561Japan Industrial Research Institute Aomori Prefectural Industrial Technology Research Center4-11-6Daini-TonyamachiAomori 030-0113Japan Department of Chemistry Faculty of Science and TechnologyThammasat UniversityPathumtani 12120 Thailand Department of Nanoscience Sojo University4-22-1Nishi-kuKumamoto-shiKumamoto 860-0082Japan Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas PadjadjaranJl.Raya Bandung–Sumedang KM.21 JatinangorSumedang 45363Indonesia

In this work,to efficiently utilize waste fruit and low-rank coal for the hydrogen(H_(2))-rich syngas production,steam co-gasification of banana peel(BP)and brown coal(BC)was studied in a fixed-bed *** results showed that the gasification rate of BC was highly enhanced after mixing it with BP and the obvious synergistic effect was observed in all investigated three mixing weight ratios(i.e.,1:1,1:4,4:1),resulting in a higher carbon conversion as well as a H_(2)-rich gas production yield for the ***,the extent of promotion by synergistic effect was affected by the reaction temperature,mixing ratio,and steam *** was found that the high potassium(K)species content in the BP provided the catalytic effect not only on water-gas shift reaction but also on tar reforming/cracking,thereby enhancing the gasification of *** addition,it is confirmed that steam should be an important factor to promote the synergistic effect and H_(2)-rich gas production.

关键词： Steam co-gasification Waste banana peel Brown coal H2-rich syngas Synergistic effect

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Preparation of Fluoroalkyl End-Capped Oligomers/Hexagonal Boron Nitride Nanocomposites Possessing No Weight Loss Behavior in Nanocomposites Even after Calcination at 800°C

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Open Journal of Composite Materials 2019年第2期9卷 72-98页

作者： Jittraporn Saengkaew Takahumi Ogasawara Katsumi Yamashita suwadee kongparakul Hideo Sawada Department of Frontier Materials Chemistry Graduate School of Science and Technology Hirosaki University Hirosaki Japan Department of Chemistry Faculty of Science and Technology Thammasat University Pathumthani Thailand

Fluoroalkyl end-capped acrylic acid oligomer [RF-(ACA)n-RF]/hexagonal boron nitride (h-BN) nanocomposites [RF-(ACA)n-RF/h-BN] were prepared by reaction of the corresponding oligomer with h-BN nanoparticles (mean diameter: 50 nm) under non-catalytic or alkaline conditions, respectively. Fluoroalkyl end-capped N,N-dimethylacrylamide oligomer/h-BN nanocomposites [RF-(DMAA)n-RF/h-BN] were also obtained under similar conditions. It was demonstrated that RF-(ACA)n-RF/h-BN nanocomposites, which were prepared under alkaline conditions, afforded a clear weight loss in proportion to the contents of the oligomer in the composites after calcination at 800°C;however, the non-catalytic conditions enabled the RF-(ACA)n-RF/h-BN nanocomposite to give no weight loss behavior corresponding to the contents of the oligomer even after calcination. In fact, it was demonstrated that the RF-(ACA)n-RF/h-BN nanocomposites possessing a clear weight loss property could afford the fluorescent peak around 370 nm related to h-BN in the composites;however, the same fluorescent intensity of this nanocomposite after calcination at 800°C as that of the original h-BN was observed, indicating that this nanocomposite could give a clear weigh loss behavior corresponding to the content of the oligomer during the calcination process. In contrast, the RF-(ACA)n-RF/h-BN nanocomposites possessing no weigh loss behavior were found to exhibit the similar fluorescent intensity before and even after calcination at 800°C, suggesting that the corresponding nanocomposites could provide no weight loss ability corresponding to the contents of the oligomer in the composites even after calcination. Similarly, RF-(DMAA)n-RF/h-BN nanocomposites, which were prepared under non-catalytic or alkaline conditions, were found to provide no weight loss corresponding to the contents of the oligomer even after calcination, respectively. These fluorinated h-BN nanocomposites were applied to the surface modification of PMMA [poly(meth

关键词： Fluorinated Oligomer Hexagonal Boron Nitride Nanocomposite Thermal Stability No Weight Loss Calcination Surface Modification Oleophobicity Fluorecence Spectra PMMA

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