ENGINEERING JOURNAL : ANALISIS SIFAT MEKANIK BIOKOMPOSIT LAMINAT SERAT SABUT KELAPA DENGAN RESIN POLIESTER

Jurnal Rekayasa Vol 6 No 1 Artikel 06

Sumarji
(Staf Pengajar Jurusan Teknik Mesin, Fakultas Teknik, Universitas Jember)


ABSTRACT: Coconut coir is result from other side from coconut fruit. Exploiting of coconut coir in this time still very less, evaluated of economic value and also its added value. From technological facet of coconut coir can be exploited upon which composite fiber. This research is executed with a purpose to (a) make laminated composite of coconut coir fiber in the place of synthetic fiber, and (b) test and determine the mechanic properties of laminated composite for the materials engineering. Laminated composites made with combinations of coconut coir fiber and matrix of resin polyester with direction oriented fiber 0o / 90o. Influence of variation of the checked is volume faction of fiber and time treatment of fiber in alkali solution (NaOH) with concentration 5%. Examination mechanical properties of laminated composites done with tensile test which relate ASTM D 638 and test of bending which relate of ASTM C 393 standard. Result of research, the ultimate tensile strength equal to 11,019 MPa at laminated composites with volume faction of fiber equal 12%, and is time of treatment of NaOH 2 hour. The ultimate bending strength equal to 44,640 MPa at laminated composite with volume faction fiber equal 12%, and is time of treatment of NaOH 6 hour. From fracture surface that happened is brittle fracture. Result of micro structure observation happened fiber pull out accompanied with delaminating.

Keywords : coconut coir fiber, laminated composite, mechanic properties.


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