耐化学腐蚀和疏水性的食品包装用含SnO_(2)生物纳米复合材料  

Bionanocomposites containing SnO_(2) with improved chemical resistance and hydrophobic behaviours for applications in food packaging industry

作　　者：Joseph Raj XAVIER CDHANALAKSHMI Shanmuga Sundari CHANDRARAJ SPVINODHINI 

机构地区：[1]Department of Chemistry,Saveetha School of Engineering,Saveetha Institute of Medical and Technical Sciences,Chennai-602105,Tamil Nadu,India [2]Department of Chemistry,Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology,Chennai-600062,Tamil Nadu,India

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第7期2136-2154,共19页中国有色金属学报（英文版）

摘　　要：研究了聚(天冬酰胺-共苯丙氨酸)(P(Asn-co-Phe)/SnO_(2))对环氧树脂(EP)涂层防护性能的影响。电化学阻抗谱分析表明,与纯环氧树脂涂层相比,马口铁表面EP-P(Asn-co-Phe)/SnO_(2)纳米复合材料涂层具有更好的防护作用。EP-P(Asn-co-Phe)/SnO_(2)纳米复合材料涂层的电阻(Rcoat)为3854.70 kΩ·cm^(2),比环氧树脂涂层的大38倍。扫描电化学显微镜分析表明,EP-P(Asn-co-Phe)/SnO_(2)的电流分布更小。通过XRD和SEM/EDX对降解产物进行分析,证实了功能化SnO_(2)颗粒对环氧树脂涂层防护能力的影响。EP-P(Asn-co-Phe)/SnO_(2)纳米复合材料涂层的水接触角为133°,证实了其疏水性。此外,与纯环氧树脂涂层相比,EP-P(Asn-co-Phe)/SnO_(2)纳米材料复合涂层具有更高的力学性能和抗菌活性。综上,由于在环氧树脂基体中添加了P(Asn-co-Phe)/SnO_(2)纳米颗粒,EP-P(Asn-co-Phe)/SnO_(2)纳米复合材料提供了出色的屏障和力学性能,从而阻碍了材料的降解,有助于延长涂层钢的寿命。The influence of poly(asparagine-co-phenylalanine)(P(Asn-co-Phe)/SnO_(2))on the protection performance of epoxy coating was investigated.The electrochemical impedance spectroscopy(EIS)analysis indicates the better protection against coating degradation of epoxy(EP)-P(Asn-co-Phe)/SnO_(2)nanocomposite on tinplate compared to that of pure epoxy coatings.The coating resistance(Rcoat)of the EP-P(Asn-co-Phe)/SnO_(2)nanocomposite is found to be 3854.70 kΩ·cm^(2).The Rcoat of EP-P(Asn-co-Phe)/SnO_(2)nanocomposite coating is found to be over 38 times greater than that of the EP coating.Scanning electrochemical microscopy(SECM)analysis shows less current distribution for the EP-P(Asn-co-Phe)/SnO_(2).The analyses of degradation products by XRD and SEM/EDX confirm the influence of functionalized SnO_(2)particles on the protecting ability of epoxy coating.The hydrophobic nature of the EP-P(Asn-co-Phe)/SnO_(2)nanocomposite coating(θ=133°)is confirmed by water contact angle measurement.The resultant nanocomposite coatings display enhanced mechanical properties.The results show that the EP-P(Asn-co-Phe)/SnO_(2)nanocomposite in wells increased the antibacterial activity as compared with pure EP.Therefore,it is concluded that the newly synthesized EP-P(Asn-co-Phe)/SnO_(2)nanocomposite provides an outstanding barrier and mechanical properties due to the addition of P(Asn-co-Phe)/SnO_(2)nanoparticles to the epoxy matrix,which obstructs the degradation of materials and assists in prolonging the life of the coated steel.

关 键 词：马口铁 环氧树脂 SnO_(2) 纳米材料复合涂层 共聚物 热稳定性 硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TS206.4[金属学及工艺—金属学]