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Application of recycled polyol and benzimidazole to the enhancement of antifungal activity of polyurethane

机译:再生多元醇和苯并咪唑的应用在聚氨酯增强抗真菌醛活性的应用

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Recycled polyol and benzimidazole were both grafted onto polyurethane (PU) to enhance the surface hydrophilicity and antifungal activity, respectively. The two grafted groups affected the viscosity, crosslink density, soft segment glass transition, breaking stress, flexibility at freezing temperature, shape recovery at -10 degrees C, surface hydrophilicity, and antifungal activity. The glass transition temperature increased from -67.5 degrees C for plain PU up to -60.8 degrees C after the grafting of polyol. The breaking stress and shape recovery of the grafted PU increased up to 425% and 200%, respectively, relative to plain PU because of the chemical linking by the grafted polyol. The hydrophilicity of PU, evaluated by the water contact angle and water swelling ratio, increased with increasing polyol content. A PU sample demonstrated excellent low-temperature flexibility in comparison to plain PU and control sample. Finally, the PUs modified with grafted polyol and benzimidazole completely suppressed fungal growth. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46600.
机译:将再循环多元醇和苯并咪唑均接枝到聚氨酯(PU)上,以增强表面亲水性和抗真菌活性。两个接枝基团影响粘度,交联密度,软段玻璃转变,断裂应力,冷冻温度的柔韧性,在-10℃,表面亲水性和抗真菌活性下形成。玻璃化转变温度从-67.5摄氏度升高到多元醇嫁接后的普通PU至-60.8℃。由于接枝多元醇的化学连接,接枝PU的断裂应力和形状分别增加了高达425%和200%,相对于平原PU增加了425%和200%。通过水接触角和水溶胀比评价的PU的亲水性随着多元醇含量的增加而增加。与普通PU和对照样品相比,PU样品显示出优异的低温柔韧性。最后,用接枝多元醇和苯并咪唑改性的脓液完全抑制了真菌生长。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2018,135,46600。

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