Venkatesan Raja, Alagumalai Krishnapandi, Raorane Chaitany Jayprakash, Raj Vinit, Shastri Divya, Kim Seong-Cheol
School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
School of Pharmacy, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Polymers (Basel). 2022 Dec 26;15(1):101. doi: 10.3390/polym15010101.
A poly(methyl methacrylate--maleic anhydride) P(MMA--MA) copolymer was synthesized via radical polymerization. The synthesized P(MMA--MA) copolymer was identified by H- and C-nuclear magnetic resonance spectroscopy (H-NMR), (C-NMR), Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The poly(butylene adipate--terephthalate) (PBAT)/P(MMA--MA)-SiO composites were developed using a solution-casting method. The PBAT to P(MMA--MA) weight ratio was kept at 70:30, while the weight percentage of SiO nanoparticles (NPs) was varied from 0.0 to 5.0 wt.%. SiO was used for PBAT/P(MMA--MA) to solve the compatibility between PBAT and the P(MMA--MA) matrix. The PBAT/P(MMA--MA)-SiO composites were characterized by studied FTIR spectroscopy, XRD, SEM, and TEM. A comparison of the composite film PBAT/P(MMA--MA)-SiO (PBMS-3) with the virgin PBAT and P(MMA--MA) film revealed its good tensile strength (19.81 MPa). The WVTR and OTR for the PBAT/P(MMA--MA)-SiO composites were much smaller than for PBAT/P(MMA--MA). The PBAT/P(MMA--MA)-SiO WVTR and OTR values of the composites were 318.9 ± 2.0 (cc m per 24 h) and 26.3 ± 2.5 (g m per 24 h). The hydrophobicity of the PBAT/P(MMA--MA) blend and PBAT/P(MMA--MA)-SiO composites was strengthened by the introduction of SiO, as measured by the water contact angle. The PBAT/P(MMA--MA)-SiO composite films showed excellent antimicrobial activity against the food-pathogenic bacteria and from the area of inhibition. Overall, the improved packaging characteristics, such as flexibility, tensile strength, low O and HO transmission rate, and good antimicrobial activities, give the PBAT/P(MMA--MA)-SiO composite film potential for use in food packaging applications.
通过自由基聚合反应合成了聚（甲基丙烯酸甲酯 - 马来酸酐）P（MMA - MA）共聚物。采用氢核磁共振光谱（H-NMR）、碳核磁共振光谱（C-NMR）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对合成的P（MMA - MA）共聚物进行了表征。采用溶液浇铸法制备了聚己二酸丁二醇酯 - 对苯二甲酸丁二醇酯（PBAT）/P（MMA - MA）-SiO复合材料。PBAT与P（MMA - MA）的重量比保持在70:30，而SiO纳米颗粒（NPs）的重量百分比在0.0至5.0 wt.%之间变化。使用SiO来解决PBAT与P（MMA - MA）基体之间的相容性问题。通过FTIR光谱、XRD、SEM和TEM对PBAT/P（MMA - MA）-SiO复合材料进行了表征。将复合薄膜PBAT/P（MMA - MA）-SiO（PBMS - 3）与纯PBAT和P（MMA - MA）薄膜进行比较，结果表明其具有良好的拉伸强度（19.81 MPa）。PBAT/P（MMA - MA）-SiO复合材料的水蒸气透过率（WVTR）和氧气透过率（OTR）远低于PBAT/P（MMA - MA）。复合材料PBAT/P（MMA - MA）-SiO的WVTR和OTR值分别为318.9 ± 2.0（cc m每24小时）和26.3 ± 2.5（g m每24小时）。通过水接触角测量发现，引入SiO增强了PBAT/P（MMA - MA）共混物和PBAT/P（MMA - MA）-SiO复合材料的疏水性。PBAT/P（MMA - MA）-SiO复合薄膜对食品致病菌显示出优异的抗菌活性，抑菌圈面积较大。总体而言，PBAT/P（MMA - MA）-SiO复合薄膜具有柔韧性、拉伸强度高、氧气和水蒸气透过率低以及良好的抗菌活性等改进的包装特性，在食品包装应用中具有潜在的应用价值。
