Effect of microwave rations on electrical, mechanical and thermal properties of poly(Vynylalcohol) nano composite films

Modification of polymer nanocomposite properties using radiations is gaining wide acceptance among researchers in both academia and industry. Electron beam, gamma, UV, X-rays, and microwave are the common radiations being used to alter the properties of the polymer composites. Compared to the other types, microwave radiation is easier to use, cheaper, and safer technology. Poly (vinyl alcohol) (PVA) is a polymer that has been received significant interest among researchers because of its biocompatibility and non-toxicity. Significant improvement in the properties of PVA was reported by reinforcing it with CNT and graphene. Among a number of different Nano fillers, Graphene and CNT have been emerged as promising fillers for polymer composites in the last two decades. The main advantage of adding nano filler in weak polymer matrix is as poly (vinyl alcohol) gives extraordinary enhancement in the properties. In our current proposal, solution casting technique will be used for the preparation of PVA/graphene nanocomposites. Prepared nanocomposites are subject to microwave radiations to investigate the effect of irradiation on composite properties. It is expected that an optimum dose of microwave radiation may lead to crosslinking along with improvement in dispersion of filler within the matrix. Such phenomena lead to significant improvement on the properties of the PVA and its nanocomposites. During the irradiation of polymer composites, both chain scission and crosslinking could occur simultaneously. The structure of the polymer, nature and amount of filler, and radiation conditions (power and time) are the main factors that will control the final properties of the exposed samples. The development of PVA nano composite with graphene for electrical application is an important aim of this applied research work. Electrical and electronic devices are used everywhere in our life. Their usage has been increased remarkably and we cannot imagine our modern life without the usage of such important instruments. These instruments emit large scale of electromagnetic radiations which overlap with other equipment leading to damage or malfunctioning. Therefore, the need of reliable and effective electromagnetic interference (EMI) shielding materials is essential in the current circumstances. Recently, polymer based conductive composites have been attracted considerable amount of attention among the researchers owing to their low cost, low density, durability and good mechanical properties. The current study aims to investigate the effect of microwave radiation on thermal, mechanical and electrical (DC conductivity and electromagnetic interference shielding effectiveness) properties of PVA/graphene composites. Different characterization techniques will be used to achieve our objectives. During the last ten years, the Principal investigator (PI) of this proposal built a strong infrastructure in the area of polymer engineering. This proposal will support the continuity of the polymer research in the chemical engineering department. The PI published more than seventy refereed papers and among them there are several studies related to this subject. This experience will be utilized to complete this project successfully.