PENGARUH KOMPOSISI PENGISI SERTA TEKANAN HOT PRESS TERHADAP KEKUATAN TARIK KOMPOSIT POLIESTER BERPENGISI NANO PARTIKEL ZINC OXIDE (ZnO)

Abstract

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh penambahan pengisi zinc oxide (ZnO) dan tekanan hot press terhadap kekuatan tarik dan karakteristik Scanning Electron Microscope (SEM) komposit poliester berpengisi zinc oxide (ZnO). Komposit disediakan dengan poliester sebagai matriks, katalis yang digunakan metil etil keton peroksida (MEKPO) dan dicampur dengan zinc oxide (ZnO) sebagai pengisi dengan penambahan komposisi zinc oxide (ZnO) 0%; 1%; 3%; 5%; dan 7% (b/b) yang dicetak dengan alat hot press dengan variasi tekanan 50 psi, 75 psi, 100 psi, 125 psi dan 150 psi. Komposit yang telah dicetak kemudian dilakukan uji kekuatan tarik dan pengujian karakteristik Scanning Electron Microscope (SEM). Hasil kekuatan tarik terbaik diperoleh pada penambahan 3% ZnO (b/b) pada tekanan 150 psi dengan kekuatan tarik 55,12 MPa. Karakterisasi SEM menunjukkan permukaan yang lebih kasar yaitu pada penambahan 3% ZnO pada tekanan 150 psi karena pembasahan yang baik antara matriks dan pengisi ZnO.Kata kunci: hot press, poliester, komposit, kekuatan tarik, zinc oxide AbstractThe aim of this research was to determine the effects of filler loading and pressure of hot press on tensile strength of zinc oxide (ZnO) filled polyester composites. The Composites were prepared by using polyester as the matrix, methyl ethyl ketone peroxide (MEKPO) as the catalyst. The composites were filled by the zinc oxide at 0%; 1%; 3%; 5%; and 7% were molded by hot press with pressure variation of 50 psi, 75 psi, 100 psi, 125 psi and 150 psi. Composites have been molded, then tested for the characteristics Scanning Electron Microscope (SEM) and tests of tensile strength. The best result of tensile strength, impact and flexural were found on the addition of 3% ZnO at a pressure of 150 psi with a tensile strength of 55,12 MPa. SEM characterization showed a rough surface on the addition of 3% ZnO at a pressure of 150 psi because had a good wetting between matrix and filler ZnO.

Biosynthesis and Characterization of Edible Films from Kepok Banana Peel Starch with a Combination of Glycerol-Sorbitol Plasticizer

“…In this study, the highest elongation value was obtained at 9.9862% on edible films with a glycerol-sorbitol ratio of 100:0, so that it can be stated that edible films from all variations in the glycerol-sorbitol concentration ratio produced poor elongation values and did not meet the JIS 1975 standard. This can be caused by the use of ZnO as a filler which can increase the tensile strength value, but reduce the elongation value [25]. Young's modulus of edible film.…”