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Investigating the thermo-mechanical and UV-shielding properties of a nano-porous Zr(IV)-type metal-organic framework (MOF) incorporated epoxy composite coating
Progress in Organic Coatings ( IF 6.6 ) Pub Date : 2022-01-06 , DOI: 10.1016/j.porgcoat.2021.106693
Arsalan Rahmani Ghohrodi 1 , Mohammad Ramezanzadeh 1 , Bahram Ramezanzadeh 1
Affiliation  

In the present work, the effects of UIO-66 nanoparticles on the epoxy-polyamide composite coating thermal resistance, mechanical features, and weathering (UV) resistance were explored. The nanoporous UIO-66 particles were developed by the common solvothermal procedure. The final particles were identified by Brunauer–Emmett–Teller (BET), Fourier transform infrared (FT-IR) spectroscopy, and Raman analysis. Also, the thermal properties, as well as the mechanical characteristics of the epoxy nanocomposites loaded with 0.2, 0.4, 0.8, and 1.2 wt% of the UIO-66 particles were studied by thermal gravimetric analysis (TGA), tensile, and dynamic mechanical thermal analysis (DMTA) methods. Besides, the UIO-66 particles containing composite coatings UV resistance at various loadings were studied after 500 h exposure to UV-A irradiation (320–400 nm range) via spectrophotometer analysis, contact angle test, surface roughness analysis, and micro-hardness investigation. BET surface area analysis illustrated a surface area (SA) of 820 m2 g−1 for the constructed metal-organic framework (MOF) particles. TGA outcome exhibited that the temperature related to the weight loss of 80% in the presence of nanoparticles (NPs) increased up to approximately 60 °C. On the other hand, the tensile analysis outcomes indicated that the toughness and strain values related to the breaking of the film increased about 2.1 and 1.5 times (at 1.2 wt% filler loading), in comparison with the pure (un-filled) epoxy matrix, respectively. The DMTA test outcomes demonstrated significant improvements of the UIO-66 particles loaded epoxy coatings storage modulus in the glassy region (especially at 1.2 wt%) and crosslinking density (especially at 0.8 wt%). Results proved that the thermal and mechanical characteristics of the nanocomposite were promisingly improved compared to the pure epoxy. Results proved significant epoxy film UV-shielding properties enhancement in the presence of 1.2 wt% UIO particles.



中文翻译:

研究纳米多孔 Zr(IV) 型金属有机框架 (MOF) 结合环氧复合涂层的热机械和紫外线屏蔽性能

在目前的工作中,研究了 UIO-66 纳米粒子对环氧-聚酰胺复合涂层耐热性、机械特性和耐候性 (UV) 的影响。纳米多孔 UIO-66 颗粒是通过常见的溶剂热程序开发的。最终颗粒通过 Brunauer-Emmett-Teller (BET)、傅里叶变换红外 (FT-IR) 光谱和拉曼分析进行鉴定。此外,通过热重分析 (TGA)、拉伸和动态机械热学研究了负载 0.2、0.4、0.8 和 1.2 wt% UIO-66 颗粒的环氧树脂纳米复合材料的热性能和机械特性。分析(DMTA)方法。除了,通过分光光度计分析、接触角测试、表面粗糙度分析和显微硬度研究,在暴露于 UV-A 辐照(320-400 nm 范围)500 小时后,研究了含有复合涂层的 UIO-66 颗粒在各种负载下的抗紫外线性。BET 表面积分析表明表面积 (SA) 为 820 m2 克-1用于构建的金属有机骨架(MOF)颗粒。TGA 结果表明,在存在纳米颗粒 (NP) 的情况下,与 80% 的重量损失相关的温度升高到大约 60 °C。另一方面,拉伸分析结果表明,与纯(未填充)环氧树脂基体相比,与薄膜断裂相关的韧性和应变值增加了约 2.1 和 1.5 倍(在 1.2 wt% 填料负载下) , 分别。DMTA 测试结果表明,载有 UIO-66 颗粒的环氧树脂涂层在玻璃区域(尤其是 1.2 wt%)和交联密度(尤其是 0.8 wt%)的储能模量显着提高。结果证明,与纯环氧树脂相比,纳米复合材料的热特性和机械特性得到了显着改善。

更新日期:2022-01-07
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