Lee Juyeong, Sohn Hiesang, Kang Sang Wook
Department of Chemical Engineering and Materials Science, Sangmyung University, Seoul 03016, Republic of Korea.
Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Republic of Korea.
Membranes (Basel). 2022 Dec 5;12(12):1229. doi: 10.3390/membranes12121229.
In this study, CuO nanoparticles and -benzoquinone (-BQ) were added to a polyvinylpyrrolidone (PVP) matrix to increase N/CO selectivity. The added -BQ allowed CuO to be distributed in a uniform size in the PVP/CuO composite membrane and the matrix to be flexible by forming the interaction with PVP. The surface modification of CuO by -BQ and the well-dispersed size affected the increase in the separation performance. The PVP/CuO/-BQ composite membranes showed an N/CO selectivity of about 23.1 with N permeance of about 13.3 GPU, while the separation performance of PVP was not observed. The enhanced separation performance is attributable to the surface of CuO nanoparticles modified by -BQ inducing CO molecules to be relatively slowly transported by the adsorption properties in the polymer matrix. The chemical properties and coordinative interaction for PVP/CuO/-BQ composite membrane were measured by FT-IR spectroscopy, thermogravimetric analysis, UV-vis, scanning electron microscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy.
在本研究中，将氧化铜纳米颗粒和对苯醌（-BQ）添加到聚乙烯吡咯烷酮（PVP）基质中以提高N/CO选择性。添加的 -BQ使氧化铜在PVP/CuO复合膜中以均匀的尺寸分布，并且通过与PVP形成相互作用使基质具有柔韧性。-BQ对CuO的表面改性以及良好分散的尺寸影响了分离性能的提高。PVP/CuO/-BQ复合膜的N/CO选择性约为23.1，N渗透率约为13.3 GPU，而未观察到PVP的分离性能。分离性能的提高归因于经 -BQ改性的氧化铜纳米颗粒表面通过聚合物基质中的吸附特性诱导CO分子相对缓慢地传输。通过傅里叶变换红外光谱、热重分析、紫外可见光谱、扫描电子显微镜、X射线光电子能谱和透射电子显微镜对PVP/CuO/-BQ复合膜的化学性质和配位相互作用进行了测定。
