Khaleghi Mahroo, Didehban Khadijeh, Shabanian Meisam
Department of Chemistry, Payam Noor University (PNU), P.O. Box:19395-3697, Tehran, Iran.
Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran.
Ultrason Sonochem. 2018 May;43:275-284. doi: 10.1016/j.ultsonch.2017.12.049. Epub 2017 Dec 29.
Melamine terephthaldehyde modified graphene oxide (MTR-GO) with optimum content was easily prepared via ultrasonication method and used as anti-corrosion additive for Poly (vinyl chloride) (PVC). The effects of ultrasonicated MTR-GO on the mechanical, chemical and thermal resistance of the PVC were thoroughly studied. Change percentage of tensile strength and weight change percentage of PVC (P) and PVC/MTR-GO nanocomposite (PN) in acetone and sodium hypochlorite (NaClO) media at two different exposure temperature (20 °C and 50 °C) were examined. The PN sample showed lower change loss percentage of tensile strength in acetone uptake as compared with P sample at 20 °C. In higher temperature (50 °C), P sample was decomposed while PN still showed tensile data. The change loss percentage in tensile strength of PN sample showed 13% change at 50 °C in sodium hypochlorite while P sample showed 63% change for the parameter. Protective behavior of MTR-GO nanofiller on PVC matrix against thermal HCl releasing was investigated by Congo red tests. The results showed that the nanocomposite release less amount of HCl as compare to the neat PVC.
通过超声法可轻松制备出具有最佳含量的三聚氰胺对苯二甲醛改性氧化石墨烯（MTR-GO），并将其用作聚氯乙烯（PVC）的防腐添加剂。深入研究了超声处理后的MTR-GO对PVC的机械性能、化学性能和耐热性的影响。考察了在两种不同暴露温度（20°C和50°C）下，PVC（P）和PVC/MTR-GO纳米复合材料（PN）在丙酮和次氯酸钠（NaClO）介质中的拉伸强度变化百分比和重量变化百分比。在20°C时，PN样品在丙酮吸收过程中的拉伸强度变化损失百分比低于P样品。在较高温度（50°C）下，P样品分解，而PN仍显示出拉伸数据。PN样品在50°C的次氯酸钠中的拉伸强度变化损失百分比为13%，而P样品的该参数变化为63%。通过刚果红试验研究了MTR-GO纳米填料对PVC基体抗热释放HCl的保护作用。结果表明，与纯PVC相比，纳米复合材料释放的HCl量更少。
