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单宁酸辅助剥离的MoS2/BNC复合膜渗透能转换性能研究

作者：王旭颖，杨靖，王钊毅，张庆萧，范议议，孟秀霞

单位：山东理工大学化学化工学院

关键词：渗透能转换；二硫化钼；复合膜；单宁酸；细菌纤维素

DOI号： 10.16159/j.cnki.issn1007-8924.2024.05.006

分类号： TQ136.1

出版年,卷(期):页码： 2024,44(5):47-56

摘要：

利用一步水热法制备了二硫化钼/细菌纤维素纳米纤维（MoS2/BNC）复合材料，通过单宁酸（TA）辅助剥离成功制备了大横向尺寸的TA-MoS2/BNC纳米片；采用真空辅助过滤的方法制备了聚醚砜（PES）支撑的TA-MoS2/BNC复合膜，其抗拉强度、破坏应力、屈服应力随着TA含量的增加而增加，当TA质量浓度为200 mg/mL时，其值分别为10.04、2.38和7.78 MPa，显示了较好的组装性能.有效测试面积为7.07 mm2（约为传统膜测试面积3.4×104 μm2的207倍）的TA-MoS2/BNC复合膜表现出了较高的Na+选择性.盐差浓度为50倍时，输出功率密度为8.79 W/m2，盐差浓度为100倍时，输出功率密度达到最高14.18 W/m2，远高于文献报道.这些将为渗透能在较大面积下的高效转换提供有力支撑.

Molybdenum disulfide/bacterial cellulose nanofibres (MoS2/BNC) composites were prepared by onestep hydrothermal method. A large-size TA-MoS2/BNC nanosheets obtained by tannic acid (TA)-assisted exfoliation. The polyethersulfone (PES) supported composite membranes were successfully prepared by vacuum-assisted filtration. The tensile strength, failure stress, and yield strength of the resultant TA-MoS2/BNC composite membrane is up to 10.04 MPa, 2.38 MPa and 7.78 MPa, respectively, showing high-performance assembling. The highly Na+ ion-selective TA-MoS2/BNC composite membranes with the thickness of 870 nm produced an output power density of 8.79 W/m2 at an effective area of 7.07 mm2, which is about 207 times larger than that of the conventional testing area of 3.4×104 μm2, and captured an output power density of 14.18 W/m2 under a 100-fold salinity gradient, exceeding the reported membrane. These provide a strong guarantee of efficient conversion of osmotic energy for MoS2based membrane.

基金项目：

国家自然科学基金项目（21978157）; 山东省自然科学基金项目(ZR2022QB147, ZR2023MB093)

作者简介：

王旭颖（1998-），女，山东淄博人，硕士生，从事二维膜材料渗透能转换发电研究.*通讯作者，E-mail: mengxiux@sdut.edu.cn

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