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A novel 1,3,4-thiadiazole modified chitosan: synthesis, characterization, antimicrobial activity, and release study from film dressings
Applied Biological Chemistry ( IF 2.3 ) Pub Date : 2022-08-11 , DOI: 10.1186/s13765-022-00725-7
Ahmad E. Mohamed , Walid E. Elgammal , Aya M. Dawaba , Ahmed G. Ibrahim , Amr Fouda , Saber M. Hassan

Herein, two new polymers designated as Cs-EATT and Cs-BATT have been synthesized via linking the chitosan with the synthesized 1,3,4-thiadiazole compounds. They were characterized using 1H,13C-NMR, FT-IR, TGA, Elemental analysis, Mass spectrum, and UV–vis spectrophotometer. The synthesized polymers exhibit high activity to control the growth of pathogenic bacteria (S. aureus, B. subtilis, E. coli, and P. aeruginosa), and unicellular fungi (C. albicans). The MIC values were in the range of 25–100 µg mL–1 for Cs-EATT and 25–200 µg mL–1 for Cs-BATT with varied clear zones. The new polymers were mixed with three film-forming agents: polyvinyl alcohol, hydroxyethyl cellulose, and carboxymethyl cellulose to form six film dressings designated as E1, E2, and E3 for Cs-EATT, and B1, B2, and B3 for Cs-BATT, respectively. The evaluation of film dressings showed that the formed films had transparency, uniformity, homogeneity, elasticity, and non-irritation pH values for skin within the normal range. The maximum percentages of Cs-E/B-ATT content were recorded for film dressings E2 and B2, with values of 92.5% and 94.9%, respectively. Also, the release percentages varied according to film dressing formulation, with values in the ranges of 83.88–93.2% for Cs-EATT and (87.7–97.35%) for Cs-EATT after 9 h.

中文翻译:

一种新型 1,3,4-噻二唑改性壳聚糖:薄膜敷料的合成、表征、抗菌活性和释放研究

在此,通过将壳聚糖与合成的 1,3,4-噻二唑化合物连接,合成了两种新的聚合物,称为 Cs-EATT 和 Cs-BATT。使用 1H,13C-NMR、FT-IR、TGA、元素分析、质谱和紫外-可见分光光度计对其进行了表征。合成的聚合物在控制病原菌(金黄色葡萄球菌、枯草芽孢杆菌、大肠杆菌和铜绿假单胞菌)和单细胞真菌(白色念珠菌)的生长方面表现出高活性。Cs-EATT 的 MIC 值在 25–100 µg mL–1 的范围内,Cs-BATT 的 MIC 值在 25–200 µg mL–1 的范围内,具有不同的透明区域。将新聚合物与三种成膜剂混合:聚乙烯醇、羟乙基纤维素和羧甲基纤维素,形成六种薄膜敷料,分别命名为 Cs-EATT 的 E1、E2 和 E3,以及 Cs-BATT 的 B1、B2 和 B3 , 分别。薄膜敷料的评价表明,所形成的薄膜具有透明性、均匀性、均匀性、弹性和对皮肤无刺激性的pH值在正常范围内。薄膜敷料 E2 和 B2 的 Cs-E/B-ATT 含量的最大百分比分别为 92.5% 和 94.9%。此外,释放百分比因薄膜敷料配方而异,9 小时后 Cs-EATT 的值在 83.88-93.2% 的范围内,Cs-EATT 的值在 (87.7-97.35%) 的范围内。
更新日期:2022-08-12
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