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Synthesis and identification of new thermostable polyamides containing xanthene units with antibacterial properties and relevant composite grafted with modified GO nanoparticles
Reactive & Functional Polymers ( IF 5.1 ) Pub Date : 2020-11-22 , DOI: 10.1016/j.reactfunctpolym.2020.104780
Diyari Khaki , Hassan Namazi , S. Mojtaba Amininasab

Two series of new diamine monomers containing ether linkages, polar trifluoromethyl (-CF3), and xanthene segments were prepared. In addition, relevant high-performance polyamides (PAs) were synthesized through condensation polymerization with applying diverse aliphatic and aromatic dicarboxylic acids. The structure of compounds were characterized by Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR), and elemental analysis. The inherent viscosities values of the polymers were from 0.48 dL/g to 0.67 dL/g. The PAs indicated the glass transition temperatures (Tg), and 10% weight loss temperatures recorded within the range of 187–244 °C and 395–497 °C in N2 atmosphere, respectively. Polyamides showed a well antibacterial activity, with respect to the presence of xanthene segments in their structure. The polymeric nanocomposite was prepared through a combination of one of the synthesized polyamides with modified graphene oxide nanoparticles (m-GO NPs). The formation of potent chemical linkage across (m-GO) NPs and polymer chains caused photoluminescence intensity to enhance, thermal stability, and antibacterial properties of the nanocomposite than pure polyamide. The study of chromium ions adsorption from aqueous solutions was also performed at 25 °C and pH 7–8.



中文翻译:

包含具有抗菌性能的x吨单元的新型热稳定聚酰胺及其相关接枝改性GO纳米粒子的复合材料的合成与鉴定

制备了两个新的含醚键的新二胺单体,极性三氟甲基(-CF 3)和x吨链段。此外,通过应用各种脂肪族和芳香族二羧酸通过缩聚反应合成了相关的高性能聚酰胺(PAs)。化合物的结构通过傅立叶变换红外光谱(FT-IR),质子核磁共振(1 H NMR)和元素分析进行表征。聚合物的固有粘度值为0.48dL / g至0.67dL / g。PA显示了在N 2中记录的玻璃化转变温度(T g),以及在187–244°C和395–497°C范围内记录的10%失重温度。气氛,分别。相对于在其结构中x吨片段的存在,聚酰胺表现出良好的抗菌活性。通过将合成的聚酰胺之一与改性的氧化石墨烯纳米颗粒(m-GO NPs)组合来制备聚合物纳米复合材料。跨(m-GO)NP和聚合物链形成有效的化学键导致纳米复合材料的光致发光强度比纯聚酰胺增强,热稳定性和抗菌性能增强。还研究了在25°C和pH 7-8下从水溶液中吸附铬离子的过程。

更新日期:2020-12-01
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