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首页> 美国卫生研究院文献>Polymers >Mussel-Inspired Approach to Constructing Dual Network Coated Layered Clay for Enhanced Barrier and Antibacterial Properties of Poly(vinyl alcohol) Nanocomposites
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Mussel-Inspired Approach to Constructing Dual Network Coated Layered Clay for Enhanced Barrier and Antibacterial Properties of Poly(vinyl alcohol) Nanocomposites

机译：贻贝启发方法以构建双网络涂层分层粘土以增强聚（乙烯醇）纳米复合材料的屏障及抗菌性能

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Inspired by complexation and mussel adhesion of catechol groups in tannic acid (TA), organophilic layered double hydroxides (LDHs@TA-Ti) were synthesized by forming a one-pot assembled TA-titanium (Ti) dual network coating on the surface of layered clay for the first time. LDHs@TA-Ti/poly(vinyl alcohol) (PVA) nanocomposites were prepared by the solution casting method. The results show that TA-Ti(IV) and TiO2 coordination compounds are simultaneously formed due to hydrolysis of titanium tetrachloride and complexation of TA in aqueous solution. Upon TA-Ti coatings onto the surface of LDHs, the antibacterial rate of LDHs@TA-Ti is up to 99.98%. Corresponding LDHs@TA-Ti/PVA nanocomposites also show outstanding antibacterial properties. Compared with pure PVA, LDHs@TA-Ti/PVA nanocomposites show a 40.9% increase in tensile strength, a 17.5% increase in elongation at break, a 35.9% decrease in oxygen permeability and a 26.0% decrease in water vapor permeability when adding 1 wt % LDHs@TA-Ti. UV transmittance (at 300 nm) of LDHs@TA-Ti/PVA nanocomposites decrease by 99.4% when the content of LDHs@TA-Ti reaches 3 wt %. These results indicate that PVA matrix incorporated with LDHs@TA-Ti could be used as a potential active packaging material to extend the shelf life of food products.
机译：通过在单罐组装的TA-钛（Ti）双网络涂层上，通过在层状表面上形成单罐组装的TA-钛（TI）双网络涂层来合成有机合成的双氢氧化物（LDHS @ TA-Ti）的络合和贻贝粘附。粘土第一次。通过溶液浇铸方法制备LDHS @ TA-Ti / Poly（乙烯醇）纳米复合材料。结果表明，由于四氯化钛的水解和在水溶液中的Ta络合，同时形成Ta-Ti（IV）和TiO 2配位化合物。在Ta-Ti涂层到LDH的表面上，LDHS @ TA-TI的抗菌速率高达99.98％。相应的LDHS @ TA-TI / PVA纳米复合材料还显示出突出的抗菌性能。与纯PVA相比，LDHS @ TA-TI / PVA纳米复合材料显示拉伸强度的40.9％，伸长率增加17.5％，氧气渗透率降低35.9％，加入1时的水蒸气渗透率下降26.0％ WT％LDHS @ TA-TI。当LDHS @ Ta-Ti的含量达到3wt％时，LDHS @ Ta-Ti / PVA纳米复合材料的UV透射率（300nm）降低了99.4％。这些结果表明，掺入LDHS @ TA-TI的PVA矩阵可用作潜在的主动包装材料，以延长食品的保质期。

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