Effect of silane based functionalization on thermal and electrical properties of nanographene/nylon 6,6 composite

Samsudin, Muhammad Syazwan Nizam (2017) Effect of silane based functionalization on thermal and electrical properties of nanographene/nylon 6,6 composite. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, the increasing demand of electronic devices causes undesired electromagnetic interference (EMI) to occur and lead to many problems including interference or multifunctioning of device. To overcome the problem, injection moulded thermoplastic in form of housing component of EMI shielding effectiveness (SE) material which is in conductive or magnetic state was used. In this research, nylon 6,6 was used as the polymer matrix while nanographene platelets (NGP) was selected as conductive filler. However, nanographene tends to cause agglomeration to itself and polymer matrix. Thus, introduction of silane treatment as functionalization or coupling agent can reduce the agglomeration of nanographene and enhance the adhesion properties. Objective of this research is to study the effect of silane based functionalization on thermal and electrical properties of nylon 6,6/nanographene composites. This research involves several stages consist of material selection, formulation, dry mixed master batch, pre-dried process, compounding process, injection moulding, characterization and analysis of sample. In formulation stage, the optimum weight percentage of NGP was treated with various weight percentage of Vinyltrimethoxysilane (VTMS) then the mixture was mixed with optimum weight percentage of nylon 6,6 in homogeneous form at dry mixed master batch stage. The mixture of nylon 6,6 and NGP was pre-dried to avoid moisture. Compounding process was used to compound the mixture in pallet form followed with ASTM D638 type 4 standard injection moulded. Then characterization and analysis of samples were performed. The sample of NGP/Nylon 6,6 treated with 20% VTMS showed the most thermally stable and highest electrical conductivity. It was observed that, 20% VTMS have enough energy to help NGP disperse well and reduce agglomeration.

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