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摘要
以甲酸预处理所得蔗渣纤维素为原料制备改性纤维素基气凝胶,通过FT-IP、SEM、TGA和XRD对其进行结构表征和亚甲基蓝(MB)吸附性能研究,并与微晶纤维素为原料制备的微晶纤维素基气凝胶进行比较。研究表明,交联剂N,N′-亚甲基双丙烯酰胺(MBA)的加入,未能有效改善蔗渣纤维素基气凝胶(CA)对MB的吸附效果。对CA进行碳化得到蔗渣纤维素基碳气凝胶(PCCA),再对PCCA进行活化处理得到活化蔗渣纤维素基碳气凝胶(CCA),比表面积由CA的23.358m2/g上升到541.699m2/g;在反应温度为105℃、甲酸浓度为90%,反应时间为1h时,CCA在800mg/L的MB溶液中达到最高吸附量392.26mg/g,优于微晶纤维素气基凝胶的吸附性能,是一种性能良好、制备简单、经济环保的吸附剂,具有良好的应用前景。
Abstract
Modified cellulose-based aerogels were prepared using bagasse cellulose pretreated with formic acid.The structural characterization and the adsorption for methylene blue (MB) were studied by FT-IP,SEM,TGA and XRD,and compared with the microcrystalline cellulose-based aerogel prepared from microcrystalline cellulose.Experimental studies showed that the addition of the crosslinking agent MBA in the preparation process of the bagasse cellulose aerogels didn't not effectively improve the adsorption effect of the bagasse cellulose aerogel for MB.The bagasse cellulose-based aerogel was carbonized and activated to obtain activated bagasse cellulose-based carbon aerogel (CCA),and the specific surface increased from 23.358m2/g of the noncarbonized bagasse cellulose based aerogel to 541.699m2/g.At a reaction temperature of 105℃,a formic acid concentration of 90% and a reaction time of 1 h,the maximum adsorption capacity of CCA in 800mg/L MB solution reached 392.3mg/g,which was superior to the adsorption performance of microcrystalline cellulose-based aerogel.It is a kind of adsorbent with good performance,simple preparation,economic and environmental protection,and has good application prospects.
关键词
蔗渣
/
甲酸
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纤维素
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吸附
/
碳气凝胶
Key words
bagasse
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formic acid
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cellulose
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adsorption
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carbon aerogels
蔗渣纤维素基碳气凝胶制备及其吸附性能研究[J].
化工新型材料, 2024, 52(4): 212-216 DOI:10.19817/j.cnki.issn1006-3536.2024.04.011
[1] 赵亚红.木质纤维素基纳米复合材料对刚果红染料吸附及解吸性能的研究[D].呼和浩特:呼和浩特内蒙古农业大学,2012.
[2] 姚超,刘敏,李为民,等.凹凸棒石/氧化锌纳米复合材料对亚甲基蓝的吸附性能[J].环境科学学报,2010,30(6):1211-1219.
[3] Gupta V K.Application of low-cost adsorbents for dye removal:a review[J].Journal of Environmental Management,2009,90(8):2313-2342.
[4] 周露,陈君红,于飞,等.芬顿试剂法制备磁性碳纳米管及其对亚甲基蓝的吸附性能[J].环境化学,2012,31(5):669-676.
[5] 刘洋,洪亚楠,姚艳丽,等.中国甘蔗渣综合利用现状分析[J].热带农业科学,2017,37(2):91-95.
[6] Maleki H.Recent advances in aerogels for environmental remediation applications:areview[J].Chemical Engineering Journal,2016,300:98-118.
[7] 高鹤,梁大鑫,李坚.纤维素基气凝胶材料研究进展[J].科技导报,2016,34(19):138-142.
[8] Anirudhan T S,Shainy F,Deepa J R.Effective removal of Cobalt(Ⅱ)ions from aqueous solutions and nuclear industry wastewaterusing sulfhydryl and carboxyl functionalisedmagnetitenanocellulose composite:batchadsorption studies[J].Chemistry & Ecology,2018,35(3):1-21.
[9] Rodrigues F,Magalhes C,Medina A L,et al.Hydrogel compositescontaining nanocellulose as adsorbents for aqueous removal of heavymetals:design,optimization,and application[J].Cellulose,2019,26(17):9119-9133.
[10] 关倩.木材纤维素基气凝胶的制备与性能研究[D].哈尔滨:东北林业大学,2012.
[11] Wan C C,Lu Y,Jiao Y,et al.Fabrication of hydrophobic,electrically conductive and flame-resistant carbon aerogels by polyrolysis of regenerated cellulose aerogels[J].Carbohydrate Polymers,2015,118:115-118.
[12] 张玉清,刘以凡,杨桂芳,等.溶解体系对纤维素基气凝胶性能的影响[J].过程工程学报,2017,17(6):1310-1315.
[13] Chang X G,Zhang J Z,Wu R C,et al.Phenomenological modeling of formic acid fractionation of sugarcane bagasse by integration of operation parameters as an extended combined severity factor[J].Molecules,2021,26(9):2753-2767.
[14] Long S Y,Zhong L,Lin X L,et al.Preparation of formyl cellulose and its enhancement effect on the mechanical and barrier propertiesof polylactic acid films[J].International Journal of Biological Macromolecules,2021(172):82-92.
[15] Kweon J,Noh S.Thermal,thermomechanical,and electrochemical characterization of the organic-inorganic hybrids poly(ethylene oxide)(PEO)-silica and PEO-silica-LiClO4[J].Journal of Applied Polymer Science,2010,81(10):2471-2479.
基金资助
国家自然科学基金(21868008);广西自然科学基金青年科学基金资助(项目任务书编号2020GXNSFBA159017)
