Mussel-Inspired Approach to Constructing Dual Network Coated Layered Clay for Enhanced Barrier and Antibacterial Properties of Poly(vinyl alcohol) Nanocomposites

被引:11
|
作者
Mao, Long [1 ,2 ]
Xie, Jianda [1 ]
Wu, Huiqing [3 ]
Liu, Yuejun [2 ]
机构
[1] Xiamen Univ Technol, Fujian Prov Key Lab Funct Mat & Applicat, Xiamen 361024, Peoples R China
[2] Hunan Univ Technol, Key Lab Adv Packaging Mat & Technol Hunan Prov, Zhuzhou 412007, Peoples R China
[3] Donghua Univ, Coll Chem Chem Engn & Biotechnol, Key Lab Sci & Technol Ecotext, Minist Educ, Shanghai 201620, Peoples R China
基金
中国国家自然科学基金;
关键词
layered clay; tannic acid; titanium; poly(vinyl alcohol); barrier properties; active packaging; HALLOYSITE NANOTUBES; POLYVINYL-ALCOHOL; DOUBLE HYDROXIDES; POLY(EPSILON-CAPROLACTONE); ANTIOXIDANT; NANOHYBRIDS; FABRICATION;
D O I
10.3390/polym12092093
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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.
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页数:15
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