AB 型点击聚合功能化硝化纤维素膜：方法和性能增强,ACS Applied Polymer Materials

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AB 型点击聚合功能化硝化纤维素膜：方法和性能增强
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-11-23 , DOI: 10.1021/acsapm.2c01305
Periyamuthu Ramar _{1,

2} , Debasis Samanta _{1,

2}

Affiliation

硝化纤维素 (NC) 主要用于推进剂和净化膜，最近因其在柔性太阳能电池、分子电子设备、生化过程和皮革涂层中的应用潜力而进一步受到关注。为了使硝化纤维素基材料的应用领域多样化，一些固有性能如柔韧性、透明性、疏水性、稳定性、脱硝热等需要改进。如本文所述，在通过独特的 AB 型点击聚合对硝化纤维素表面进行功能化后，发现大多数这些特性得到了显着增强，这归因于化学功能、结晶度、形态等的变化，如从 X- 观察到的射线衍射 (XRD)、场发射扫描电子显微镜、原子力显微镜 (AFM) 和小角度 X 射线散射 (SAXS) 分析。与传统的 AABB 型点击聚合不同，本文将叠氮基和炔烃官能团并入同一单体中以获得更好的功效，其中 AB 型点击聚合是在叠氮官能化硝化纤维素存在的情况下发生的。这是一种典型的接枝穿透方法，其中聚合反应既发生在溶液中又发生在表面上，提供了两种状态下表征的灵活性，为这种典型的聚合反应和固定化的成功提供了明确的证据，正如由溶液态和固态核磁共振 (NMR)、X 射线光电子能谱 (XPS) 和衰减全反射傅里叶变换红外 (ATR-FTIR) 光谱。

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Functionalization of Nitrocellulose Film by AB-Type Click Polymerization: Methods and Property Enhancements

Nitrocellulose (NC), predominantly used in propellants and purifying membranes, has further gained attention recently because of its application potential in flexible solar cells, molecular electronic devices, biochemical processes, and leather coatings. For the diversification of application areas of nitrocellulose-based materials, some of the inherent properties like flexibility, transparency, hydrophobicity, stability, heat of denitration, etc., require improvements. As presented in this paper, most of those properties were found to be substantially enhanced after the functionalization of nitrocellulose surfaces by a unique AB-type click polymerization, attributed to changes in chemical functionality, crystallinity, morphology, etc., as observed from X-ray diffraction (XRD), field-emission scanning electron microscopy, atomic force microscopy (AFM), and small-angle X-ray scattering (SAXS) analyses. Unlike conventional AABB-type click polymerization, herein, both azide and alkyne functional groups have been incorporated in the same monomer for better efficacy, where AB-type click polymerization took place in the presence of azide-functionalized nitrocellulose. This is a typical graft-through approach, where polymerization took place both in solution as well as on surfaces, providing flexibility of characterization in both states for the clear-cut evidence of the success of this typical polymerization as well as immobilization, as studied by solution-state as well as solid-state nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The material was used as a hydrophobic/superhydrophobic coating for leather surfaces.

更新日期：2022-11-23

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