Abstract

In this work, the effect of Zn-cyclen mimic enzyme on the properties of poly(vinyl alcohol)/cellulose nanocrystals (PVA/CNC) nanocomposite membranes have been studied at three different relative humilities (0%RH, 53%RH and 93%RH). Different amounts of mimic enzyme were incorporated, and membranes were prepared by solution casting. The fabricated nanocomposite films were characterized by X-ray Diffraction, Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy. The results revealed good interfacial interactions between the constituents. The membranes showed enhanced uptake of moisture, with increasing mimic enzyme concentration as well as humidity. The membranes demonstrated the ability to uptake moisture for almost 4 days. The mechanical properties showed an opposite trend as expected. Tensile strength, tensile modulus and dynamic mechanical properties declined with increase in humidity along with mimic enzyme amount. The highest elastic modulus i.e. 33 MPa was found at the lowest humidity i.e. 0%RH for the pure PVA membrane. Similarly, the maximum tensile strength of 118 MPa was found at the similar conditions for the same formulation. The obtained results suggested the potential application of PVA/CNC and mimic enzyme membranes in CO₂ separation_.

Graphic Abstract

中文翻译：

---

锌-环模拟酶对纤维素纳米晶体/ PVA纳米复合膜的力学，热学和溶胀性能的影响

摘要

在这项工作中，已经研究了三种不同相对湿度（0％RH，53％RH和93％）下锌-环模拟酶对聚乙烯醇/纤维素纳米晶体（PVA / CNC）纳米复合膜性能的影响。 RH）。掺入不同量的模拟酶，并通过溶液流延制备膜。通过X射线衍射，傅立叶变换红外光谱和扫描电子显微镜对制备的纳米复合薄膜进行表征。结果表明各成分之间存在良好的界面相互作用。膜显示出增加的水分吸收，同时增加了模拟酶的浓度和湿度。膜表现出能够吸收近4天水分的能力。机械性能显示出与预期相反的趋势。抗拉强度，拉伸模量和动态力学性能随着湿度的增加以及模拟酶的含量而下降。对于纯PVA膜，在最低湿度即0％RH下发现最高弹性模量即33 MPa。类似地，在相同配方的相似条件下发现最大抗拉强度为118 MPa。获得的结果表明PVA / CNC和模拟酶膜在CO中的潜在应用₂分离_。

图形摘要