黄关红,骆华英,贵仁兵,胡志军,曹鑫宇,郭大亮,林江.超临界预处理-球磨法制备纤维素纳米纤丝及其表征[J].中国造纸学报,2022,(2):9-14 本文二维码信息
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超临界预处理-球磨法制备纤维素纳米纤丝及其表征
Preparation and Characterization of Cellulose Nanofibers by Supercritical Pretreatment-Ball Milling
投稿时间:2021-08-09  
DOI:10.11981/j.issn.1000-6842.2022.02.09
中文关键词:  纤维素纳米纤丝(CNF)  微纤维化纤维素(MFC)  超临界CO2/乙醇  球磨法
Key Words:cellulose nanofiber (CNF)  micro-fibrotic cellulose (MFC)  supercritical CO2/ethanol  ball milling
基金项目:浙江省26县绿色专项(2021C02031);浙江省公益技术研究项目(LGG19C160001);浙江省重点研发项目(2019C01156);国家自然科学基金项目(21808209)。
作者单位邮编
黄关红 浙江科技学院环境与资源学院浙江杭州310023 310023
骆华英 仙鹤股份有限公司浙江衢州324022 324022
贵仁兵 仙鹤股份有限公司浙江衢州324022 324022
胡志军 浙江科技学院环境与资源学院浙江杭州310023 310023
曹鑫宇 浙江科技学院环境与资源学院浙江杭州310023 310023
郭大亮 浙江科技学院环境与资源学院浙江杭州310023 310023
林江 浙江科技学院环境与资源学院浙江杭州310023 310023
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中文摘要:
      以微纤维化纤维素(MFC)为原料,通过超临界CO2/乙醇预处理结合球磨法制备纤维素纳米纤丝(SCB-CNF),探讨了超临界CO2/乙醇预处理条件对MFC的影响,并与2,2,6,6-四甲基哌啶-1-氧自由基(TEMPO)预处理结合微流体均质法(TMH)制备的纤维素纳米纤丝(TMH-CNF)进行对比研究,采用扫描电子显微镜(SEM)、场发射扫描电子显微镜(FE-SEM)、X射线衍射仪(XRD)和热重分析仪(TG)对样品进行表征。结果表明,超临界CO2/乙醇预处理可将束状MFC分解为单根纤维,使MFC的长度和直径明显减小;超临界CO2/乙醇预处理后的纤维素(P-MFC)的结晶度随预处理时间和温度的变化呈先升高后降低的趋势;SCB-CNF的热稳定性和结晶度均高于TMH-CNF,且形态呈针束状,长度远小于TMH-CNF,更易分散,在复合材料和生物医药(药物输送)等领域具有潜在的应用价值。
Abstract:
      Cellulose nanofiber (SCB-CNF) was prepared from micro-fibrotic cellulose (MFC) by supercritical CO2/ethanol pretreatment combined with ball milling. The effects of supercritical CO2/ethanol pretreatment conditions on MFC were explored and SCB-CNF was further compared with cellulose nanofiber (TMH-CNF) prepared by 2,2,6,6-tetramethylpiperidine-1-oxygen radical (TEMPO) pretreatment combined with microfluidics homogenization (TMH). The as-prepared CNFs were characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), X-ray diffractometer (XRD), and thermogravimetric (TG) analysis. The results showed that the MFC bundle was decomposed into single fiber by supercritical CO2/ethanol pretreatment, and the length and diameter of which were significantly reduced. The crystallinity of cellulose (P-MFC) pretreated by supercritical CO2/ethanol increased firstly and then decreased along with the variation in pretreatment time and temperature. Compared with TMH-CNF, the needle-like SCB-CNF is of higher thermal stability and crystallinity, shorter length, and is easier to be dispersed, exhibiting potential application value in composite materials, biomedicine (drug delivery), and other fields.
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