Proceedings of the 1st International Conference on Chemical Science and Technology Innovation最新文献

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Thermal and Morphological Properties of Polyvinyl Alcohol-based Hydrogel Containing Microcrystal Cellulose 含微晶纤维素的聚乙烯醇基水凝胶的热性能和形态性能

Proceedings of the 1st International Conference on Chemical Science and Technology Innovation Pub Date : 2019-01-01 DOI: 10.5220/0008932403120318

Riski Aulia Hasibuan, D. A. Nasution, B. Wirjosentono

{"title":"Thermal and Morphological Properties of Polyvinyl Alcohol-based Hydrogel Containing Microcrystal Cellulose","authors":"Riski Aulia Hasibuan, D. A. Nasution, B. Wirjosentono","doi":"10.5220/0008932403120318","DOIUrl":"https://doi.org/10.5220/0008932403120318","url":null,"abstract":": In this work, the PVA-based hydrogels containing various loading of microcrystal cellulose (MCC: 0; 0.2; 0.4; 0.6 and 0.8) g were prepared in a bench-scale reflux-reactor using water as a solvent in an optimized condition. Other constituents added, i.e. acrylic acid (AA) and N’N-Methylene bisacrylamide (MBA) as comonomers as well as ammonium persulphate ((NH4)2S2O8) as initiator was keeping their composition ratio constant. Products of the interpenetrating-hydrogels were cast in plastic mold and cooled, and then characterized. First of all, their absorption properties and were measured using swelling test to know optimum conditions and the next will be characterized with FTIR, DSC, and SEM. Results showed that the optimum composition ratio of PVA/AA/MCC/MBA/APS = 0.4/4/0.6/0.06/0.2 enhanced the water absorption. FTIR analysis of the film specimen after exhaustive extraction in n-hexane still contained stable AA-carbonyl (C=O) absorption peak at 1713 cm -1 of hydrogel 1 and 1707 cm -1 of hydrogel 4. The thermal properties of the optimized composition of the hydrogel 1 showed its stable decomposition temperature (thermal stability of 482.28 o C). Morphological properties of the interpenetrating-hydrogel micro composites also showed finely distributed of the micro filler, which is responsible for its improved mechanical and thermal properties.","PeriodicalId":20533,"journal":{"name":"Proceedings of the 1st International Conference on Chemical Science and Technology Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75239491","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: 2

Identification and Analysis of Potential Antioxidants from Leaves of Eucalyptus robusta PT. Toba Pulp Lestari, Tbk. 罗布斯塔桉叶中潜在抗氧化剂的鉴定与分析。

Proceedings of the 1st International Conference on Chemical Science and Technology Innovation Pub Date : 1900-01-01 DOI: 10.5220/0008920002450248

Chintya Cahaya, M. Taufik, Z. Alfian, S. Lenny, R. Hidayati

{"title":"Identification and Analysis of Potential Antioxidants from Leaves of Eucalyptus robusta PT. Toba Pulp Lestari, Tbk.","authors":"Chintya Cahaya, M. Taufik, Z. Alfian, S. Lenny, R. Hidayati","doi":"10.5220/0008920002450248","DOIUrl":"https://doi.org/10.5220/0008920002450248","url":null,"abstract":"PT Toba Pulp Lestari Tbk is a global pulp producing company that develops forest industry concessions and stores a variety of underutilized biodiversity such as Eucalyptus robusta leaves which are widely found around the PT Toba Pulp Lestari Tbk forest area. Eucalyptus robusta leaves produce oil that is used as liniment, cough medicine, perfume, soap, detergent, disinfectant and pesticides. Eucalyptus robusta and supports its antioxidant potential. Eucalyptus leaves are first described with several solvents, such as methanol, ethanol and dichloromethane. The potential of antioxidants using the DPPH method on the 1800 Uv-Vis Spectrometer. The antioxidant activity test was carried out with the DPPH method (1.1 diphenyl pikrilhidrazil) with a variation of sample volume 20; 30; 40; 50; 60 μL. Eucalyptus leaf extract showed antioxidant activity with IC50 of 8,386 μg / mL. The Eucalyptus leaf extract is categorized as providing weak antioxidant activity. Analysis of active composition that can be used in eucalyptus leaves using the GCMS method. The main compounds contained were cineol 52%.","PeriodicalId":20533,"journal":{"name":"Proceedings of the 1st International Conference on Chemical Science and Technology Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89656884","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: 2

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