摘要
通过氢氟酸(HF)刻蚀法制备了过渡金属碳化物/碳氮化物(MXene)二维纳米材料,并与纤维素纳米纤维(CNF)复合制备了MXene/CNF复合气凝胶。利用SEM、X射线衍射仪(XRD)、EDS元素分析、傅里叶变换红外光谱(FT-IR)、热重测试(TGA)和红外热成像仪(IR)等技术分析了该复合气凝胶的微观形貌、晶体结构、化学组成、化学结构、热稳定性和光热转换性能。结果表明:Mxene呈片状二维结构,复合气凝胶呈三维多孔结构;MAX中的Al元素被成功地去除,MXene和CNF之间没有化学相互作用;复合气凝胶的热稳定性随着MXene添加量的增加而提高;MXene/CNF复合气凝胶能够快速从室温(18.9℃)升高至26.1℃,水蒸气蒸发速率达到了584.00g/(m^(2)·h),是相同条件下CNF气凝胶水蒸气蒸发速率的2.06倍。制备的MXene/CNF复合气凝胶具有优异的循环稳定性。
MXene,which is a kind of two-dimensional(2D)nanomaterial,was prepared by hydrofluoric(HF)acid etching.And then,the prepared MXene was compounded with cellulose nanofibers(CNF)to prepare MXene/CNF composite aerogels.The microstructure,crystal structure,chemical composition,chemical structure,thermal stability and photothermal conversion properties of the composite aerogels were analyzed by SEM,X-ray diffractometer(XRD),EDS elemental analysis,Fourier Transform Infrared Spectroscopy(FT-IR),Thermogravimetric Analysis(TGA)and Infrared Imaging(IR).The results showed that Mxene presented a flaky two-dimensional structure,and the composite aerogel presented a 3Dporous structure.The Al element in MAX was successfully removed.There was no chemical interaction between MXene and CNF.The thermal stability of composite aerogel increased with the increase of the addition of MXene.The MXene/CNF composite aerogel could rapidly increase from room temperature(18.9℃)to 26.1℃,and the vapour evaporation rate reached 584g/(m^(2)·h),which is 2.06times of vapour evaporation rate of pure CNF aerogel under the same conditions.In addition,MXene/CNF composite aerogels had excellent cycling stability.
作者
黄俊文
唐峰
李营战
周颖
余厚咏
姚菊明
HUANG Junwen;TANG Feng;LI Yingzhan;ZHOU Ying;YU Houyong;YAO Juming(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2021年第6期744-750,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省自然科学基金探索项目(LQ21E030015)
国家科技创新合作重点项目(2016YFE0131400)。
