Ti(3)C_(2)T_(x) MXene水分散液的稳定性研究  

Stability of Ti(3)C_(2)T_(x) MXene in Aqueous Dispersions

作　　者：彭婷 徐金新 张琪 覃鑫 贾丽梦 章菱歌 石胜伟 PENG Ting;XU Jinxin;ZHANG Qi;QIN Xin;JIA Limeng;ZHANG Lingge;SHI Shengwei(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2022年第6期636-642,共7页Journal of Wuhan Institute of Technology

基　　金：武汉工程大学研究生教育创新基金(CX2020156,CX2021146)。

摘　　要：为改善MXene在水分散液中的稳定性,提高存放时间,研究了抗坏血酸钠(NaAsc)、海藻酸钠(SA)、乙酸(HAc)和乙酸钠(NaAc)等抗氧化剂对MXene水分散液稳定性的影响,通过对MXene水分散液的颜色和可见光区的特征峰吸收强度的表征,建立了MXene水分散液的质量浓度随存放时间的变化关系。采用HAc和NaAc作为抗氧化剂的MXene水分散液质量浓度在第1 d下降迅速,分别为0.021和0.047 mg/mL;采用H2O和SA的MXene水分散液质量浓度在第1 d下降稍缓,分别为0.547和0.352 mg/mL;而采用NaAsc的MXene水分散液在存放第14 d时保持较高的质量浓度(0.442 mg/mL)。此外,相较其他抗氧化剂,采用NaAsc的MXene水分散液放置30 d后颜色变化微弱。实验结果表明,NaAsc对于MXene水分散液具有优异的抗氧化效果,对于未来MXene的长期储存具有重要的意义。To improve the stability of MXene in the aqueous dispersions and its storage time,the effects of antioxidants,such as sodium ascorbate(NaAsc),sodium alginate(SA),acetic acid(HAc) and sodium acetate(NaAc),on the stability of MXene aqueous dispersions were investigated. Through the characterization of the color and absorption intensity in visible region for MXene aqueous dispersions,the relationship of MXene mass concentration in aqueous dispersions with the storage time was established. The mass concentrations of MXene aqueous dispersions using HAc and NaAc as antioxidants decrease rapidly on the 1st day(0.021 and 0.047 mg/mL);while the mass concentrations of MXene aqueous dispersions using H2O and SA decrease slightly on the 1st day(0.547 and 0.352 mg/mL). The MXene aqueous dispersions using NaAsc maintain a high mass concentration(0.442 mg/mL)on the 14th day of storage. In addition,the color of MXene aqueous dispersions using NaAsc changes little after the storage of 30 d compared with that using other antioxidants. The results indicate that NaAsc has excellent antioxidant effect on MXene aqueous dispersions,showing great importance for the long-term storage of MXene in the future.

关 键 词：MXene 水分散液 抗坏血酸钠 抗氧化剂 存放稳定性 

分 类 号：TM53[电气工程—电器]