THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019最新文献

Esterification of oxidized ricinoleic acid with various alcohols to produce emulsifier and antimicrobial compounds 氧化蓖麻油酸与各种醇的酯化反应制备乳化剂和抗菌化合物

THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019 Pub Date : 2020-06-02 DOI: 10.1063/5.0005809

A. Nabilah, S. Handayani, S. Setiasih, D. Rahayu, S. Hudiyono

{"title":"Esterification of oxidized ricinoleic acid with various alcohols to produce emulsifier and antimicrobial compounds","authors":"A. Nabilah, S. Handayani, S. Setiasih, D. Rahayu, S. Hudiyono","doi":"10.1063/5.0005809","DOIUrl":"https://doi.org/10.1063/5.0005809","url":null,"abstract":"This study’s objective was to synthesize esters of ricinoleic oxidation product. The esterification products were expected may act as emulsifiers and to have antimicrobial activity against Staphylococcus epidermidis and Propionibacterium acnes. Before esterified, ricinoleic acid was oxidized by KMnO4. The success of the oxidation reaction was proven by determining iodine number. Esterification was carried out using ZnCl2 as catalyst with various alcohols, namely methanol, ethanol, isopropanol, and 1-butanol. Mole ratio fatty acid to alcohol used in esterification was 1: 2. The ester products were characterized using FTIR and the conversion percentage were determined by titrimetric method. Emulsifier test also performed to determine the ability of ester product as emulsifier. The success of oxidation was proven by decreasing iodine number from 44.05 mg/g to 17.15 mg/g and increasing absorption intensity -OH group in FTIR spectrum. FTIR spectrum of ester products showed the presence of absorption of C = O ester groups at 1750-1735 cm−1 and C-O-C at 1300-1000 cm−1 which proved the success of esterification. Emulsifier test showed that esterification products can act as emulsifiers and the emulsions formed were stable up to 24 hours for water-in-oil emulsion (w/o). The best ability as an emulsifier was shown by methyl esters. Antimicrobial assay showed that all esters can inhibit the growth both bacteria, P. acnes and S. epidermidis. The largest inhibition zone obtained for butyl ester against P. acnes by 17 mm and methyl ester against S. epidermidis by 17 mm.","PeriodicalId":117907,"journal":{"name":"THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127926020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reusability study of fenton catalyst@bacterial celluloses for removal of methylene blue as synthetic dyes model fenton catalyst@bacterial纤维素作为合成染料模型去除亚甲基蓝的可重用性研究

THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019 Pub Date : 2020-06-02 DOI: 10.1063/5.0005229

H. Ardy, Fakhri Arsyi Hawari, A. W. Y. Parmita, Untung Triadi, Azhar Isti Hanifah, A. Wibowo

引用次数: 0

Preparation of NaFeO2 from iron sand as a raw material for cathode of sodium-ion battery 以铁砂为原料制备钠离子电池正极用NaFeO2

THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019 Pub Date : 2020-06-02 DOI: 10.1063/5.0005348

F. Rahmawati, Arum A. Kusumaningtyas, T. Saraswati, I. Yahya, Younki Lee

{"title":"Preparation of NaFeO2 from iron sand as a raw material for cathode of sodium-ion battery","authors":"F. Rahmawati, Arum A. Kusumaningtyas, T. Saraswati, I. Yahya, Younki Lee","doi":"10.1063/5.0005348","DOIUrl":"https://doi.org/10.1063/5.0005348","url":null,"abstract":"Sodium-Ion Battery (SIB) is now gaining attention instead of Lithium-Ion Battery (LIB) due to a high sodium abundance compare to lithium. Na-iron oxide compound mostly studied as raw material for SIB cathode. The abundance of iron source on earth is an advantage to develop SIB. Therefore, this research aims to prepare Fe2O3 from Indonesian iron sand through co-precipitation method, and then react the Fe2O3 with Na2O2 to produce NaFeO2. The reaction was conducted at 650 °C for 12 h. XRD analysis equipped with Le Bail refinement found that the prepared Fe2O3 has diffraction pattern similar to Fe2O3 ICSD#15840, trigonal structure and space group of R-3CH. Meanwhile, the prepared NaFeO2 has a diffraction pattern similar to standard diffraction ICSD#75588. The crystal structure is trigonal / rhombohedral with a space group of R-3MH. Test of NaFeO2 as a potential host for Mn2+ ions was conducted by doped 0.1 mol% Mn into NaFeO2. Cyclic voltammetry analysis of a half cell Na | NaFeO2 | Al and Na | Mn doped-NaFeO2 | Al shows an active electrochemical reduction-oxidation of Fe2+/Fe3+ at 1.776 V vs Na+/Na. Meanwhile a potential peak at 0.808 V released by NaFeO2 half-cell confirms the electrochemical activity of Na+ ions to leach out and be inserted back into NaFeO2 cathode.","PeriodicalId":117907,"journal":{"name":"THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126461526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Kinetic study of methylene blue photocatalytic decolorization using zinc oxide under UV-LED irradiation UV-LED照射下氧化锌光催化亚甲基蓝脱色的动力学研究

THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019 Pub Date : 2020-06-02 DOI: 10.1063/5.0005263

Riki Subagyo, Y. Kusumawati, W. Widayatno

引用次数: 6

Synthesis and characterization of unsymmetrically branched alkyl chains carbazole-based polymer 不对称支链烷基咔唑基聚合物的合成与表征

THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019 Pub Date : 2020-06-01 DOI: 10.1063/5.0005389

M. Sarjadi, S. Tan, X. L. Wong, F. Anuar, Md. Shaheen Sarkar, M. L. Rahman

引用次数: 0