PVDF为成膜材料制备锂离子筛膜的性能研究
Preparation and adsorption properties of lithium- ion sieve membrane
摘要 将锂锰氧化物(Li1.6Mn1.6O4)添加到聚偏氟乙烯(PVDF)铸膜液中,通过相转化法制备了掺杂Li1.6Mn1.6O4的锂离子筛前驱体膜,经过盐酸处理洗脱锂离子后制得锂离子筛膜。采用X射线衍射、扫描电镜、吸附实验等手段对膜的结构和吸附性能进行表征。吸附实验表明,随着Li1.6Mn1.6O4含量的增加,锂离子筛膜的吸附量先增加后减小。当添加Li1.6Mn1.6O4的质量分数为15%时,锂离子筛膜的吸附量最高为6.98×10^2mg/cm^3。
Abstract:
A series of lithium-ion sieve precursor membrane with different amounts of spinel-type manganese ox- ide (Li1.6Mn1.6O4) were prepared by the phase-inversion process. The membrane was treated with HC1 solution to extract lithium, resulting in the lithium-ion sieve membrane. The structure and properties of the prepared lithium-ion sieve precursor membranes were characterized by means of SEM, XRD and adsorption experiments. Adsorption experiments show that adsorption capacity of membrane-type adsorbents increase with the amount of Li1.6Mn1.6O4 from 5% up to 15%. Further increasing the amount of Li1.6Mn1.6O4, the adsorption capacity of membrane-type adsorbents decreases. It indicates that the optimal content of Li1.6Mn1.6O4 embedded into the PVDF polymer matrix is 15% with the maximums adsorption capacity of 6.98× 10^2mg/cm2.
作者单位: 中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室,山东青岛,266100
刊 名 功能材料 ISTICEIPKU
年,卷(期): 2012, 43(22)
分类号: TQ425.22
机标分类号: TQ0 X52
在线出版日期: 2012年12月21日