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首页> 外文期刊>Journal of Applied Polymer Science >Study on the effect of plasma treatment of woven polyester fabrics with respect to nisin adsorption and antibacterial activity
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Study on the effect of plasma treatment of woven polyester fabrics with respect to nisin adsorption and antibacterial activity

机译：等离子处理机织聚酯织物对乳酸链球菌素吸附和抗菌活性的影响研究

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摘要

The effect of plasma treatment of polyester (PET) fabric with respect to nisin adsorption and antibacterial activity was studied. Both cleaned untreated PET fabric and plasma-treated PET fabric were separately dipped in aqueous nisaplin solution with 0.5 and 1% of nisin, for 24 h under stirring, and then dried. With 1% of nisin, high and immediate antibacterial activity against Staphylococcus aureus was observed, and this activity was maintained even after 24 h. However, with 0.5% of nisin, no immediate bacterial reduction was observed, and only the untreated PET fabric exhibited antibacterial activity after 24 h. Only nisin molecules which can diffuse from the fabric can impart antibacterial activity, as demonstrated by the absence of bacterial inhibition zone after complete removal of releasable nisin in water. The desorption capacity of nisin from the fabric into water was monitored by tensiometry, while the presence of residual strongly sorbed nisin on the fabric was confirmed by wettability, zeta potential measurements, and wash durability test after nisin coloration by a protein dye. Plasma treatment, which increases the hydrophilic behavior of the PET fabric (WCA reduced from 80° to 42°), increases considerably the quantities of strongly and weakly sorbed nisin. However, it does not improve antibacterial activity compared to the PET fabric without plasma treatment. The reduced mobility of the nisin molecules due to chemisorption of the first layers of nisin on the plasma treated PET fabric can explain the reduced antibacterial activity with 0.5% nisin.
机译：研究了等离子体处理聚酯（PET）织物对乳酸链球菌素的吸附和抗菌活性的影响。将清洗后的未处理的PET织物和经等离子体处理的PET织物分别浸入具有0.5％和1％的乳链菌肽的nisaplin水溶液中，搅拌24小时，然后干燥。使用1％的乳链菌肽，观察到了对金黄色葡萄球菌的高且即刻的抗菌活性，即使在24小时后仍保持了这种活性。但是，使用0.5％的乳链菌肽，没有观察到立即的细菌减少，并且只有未处理的PET织物在24 h后显示出抗菌活性。只有可以从织物中扩散出来的乳链菌肽分子才能赋予抗菌活性，这是在水中完全除去可释放的乳链菌肽后没有细菌抑制区所证明的。乳链菌肽从织物在水中的解吸能力通过张力测定法进行监测，而织物上残留的强吸附乳链菌肽的存在通过润湿性，ζ电势测量和乳链菌肽通过蛋白质染料着色后的耐洗性测试得以证实。等离子体处理可提高PET织物的亲水性（WCA从80°降低至42°），大大增加了强和弱吸附乳链菌肽的数量。但是，与未经等离子处理的PET织物相比，它不能提高抗菌活性。乳酸链球菌素分子在血浆处理过的PET织物上的化学吸附导致其迁移率降低，这可以解释0.5％乳酸链球菌素的抗菌活性降低的原因。

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