Surface modification of carbonised waste rice husks by mild hydrothermal treatment

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL

International Journal of Surface Science and Engineering Pub Date : 2021-04-12 DOI:10.1504/IJSURFSE.2021.10037024

W. Karen, J. X. Ooi, Zhipeng Wang, N. J. Siambun, W. Liew, W. Muzammil, K. Sopian, G. Melvin

{"title":"Surface modification of carbonised waste rice husks by mild hydrothermal treatment","authors":"W. Karen, J. X. Ooi, Zhipeng Wang, N. J. Siambun, W. Liew, W. Muzammil, K. Sopian, G. Melvin","doi":"10.1504/IJSURFSE.2021.10037024","DOIUrl":null,"url":null,"abstract":"Carbonisation process is a way in exploiting rice husk to produce alternative carbon material. In this study, rice husk was carbonised at 500°C, 2 h in inert environment. Mild hydrothermal treatment of carbonised rice husk was conducted by using potassium hydroxide (KOH) and potassium persulfate (KPS) as reactants in different parameters: 1) the reactants molar ratio; 2) reaction time. The treated carbonised rice husks were tested for its dispersion, morphology observation, elements and functional groups determination. From the results, the modified carbonised rice husks showed improvement in its dispersion with polar solvent while no defects in the structures were observed from the SEM images. High oxygen content was found in EDX analysis for modified carbonised rice husks treated in KOH: KPS with molar ratio of 3:1. The presence of hydroxyl and carboxyl groups from the FTIR spectra shows that the treatment successfully introduced functional group to the carbonised rice husk surface.","PeriodicalId":14460,"journal":{"name":"International Journal of Surface Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2021-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Surface Science and Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1504/IJSURFSE.2021.10037024","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 4

Abstract

Carbonisation process is a way in exploiting rice husk to produce alternative carbon material. In this study, rice husk was carbonised at 500°C, 2 h in inert environment. Mild hydrothermal treatment of carbonised rice husk was conducted by using potassium hydroxide (KOH) and potassium persulfate (KPS) as reactants in different parameters: 1) the reactants molar ratio; 2) reaction time. The treated carbonised rice husks were tested for its dispersion, morphology observation, elements and functional groups determination. From the results, the modified carbonised rice husks showed improvement in its dispersion with polar solvent while no defects in the structures were observed from the SEM images. High oxygen content was found in EDX analysis for modified carbonised rice husks treated in KOH: KPS with molar ratio of 3:1. The presence of hydroxyl and carboxyl groups from the FTIR spectra shows that the treatment successfully introduced functional group to the carbonised rice husk surface.

查看原文本刊更多论文

轻度水热处理对碳化废弃稻壳的表面改性

碳化工艺是利用稻壳生产替代碳材料的一种方法。在本研究中，稻壳在惰性环境中于500°C下碳化2小时。以氢氧化钾（KOH）和过硫酸钾（KPS）为反应物，在不同参数下对碳化稻壳进行了温和水热处理：1）反应物摩尔比；2）反应时间。对处理后的碳化稻壳进行了分散性、形态观察、元素和官能团测定。结果表明，改性后的碳化稻壳在极性溶剂中的分散性有所改善，而SEM图像中没有观察到结构缺陷。在摩尔比为3:1的KOH:KPS中处理的改性碳化稻壳的EDX分析中发现高氧含量。FTIR光谱中羟基和羧基的存在表明，该处理成功地将官能团引入了碳化稻壳表面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Surface Science and Engineering 工程技术-材料科学：膜

CiteScore

1.60

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： IJSurfSE publishes refereed quality papers in the broad field of surface science and engineering including tribology, but with a special emphasis on the research and development in friction, wear, coatings and surface modification processes such as surface treatment, cladding, machining, polishing and grinding, across multiple scales from nanoscopic to macroscopic dimensions. High-integrity and high-performance surfaces of components have become a central research area in the professional community whose aim is to develop highly reliable ultra-precision devices.