DOI: https://doi.org/10.14710/jksa.22.4.157-163

Kompatibilitas Nanokristal Selulosa Termodifikasi Setrimonium Klorida (CTAC) dalam Matriks Poliasam Laktat sebagai Material Pengemas

Compatibility of Celluloce Nanocrystal Modified Cetrimmonium Chloride (CTAC) in Polylactic Acid Matrix as Packaging Material

1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Bogor AgricuItural University, Indonesia

2Surfactant and Bioenergy Research Center, Bogor AgricuItural University, Indonesia

Received: 9 Jun 2019; Revised: 5 Jul 2019; Accepted: 20 Jul 2019; Published: 31 Jul 2019.
Open Access Copyright 2019 Jurnal Kimia Sains dan Aplikasi under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract
Growth of population increases the consumption of nonbiodegradable plastic which causes waste buildup. Diversion of plastic material from nonbiodegradable material to biodegradable is an important alternatif. PLA is a plastic polymer that is easily degraded but very brittle. Palm oil waste containing oil palm empty bunches has the potential as a reinforcement material because the cellulose content is 30-40%. Minimizing size to nanoscale will increase the surface area and dispersion ability of cellulose dispersibility into the PLA polymer matrix, thus increasing compatibility in terms of and mechanical properties and surface morphology of the composite. Hydrolysis by strong acid and centrifugation at 5000 rpm succeeded in making cellulose nanocrystal with index of polidisperse 0.5 and average particle diameter of 7.967 nm. CTAC as a solubilizer and surface modifier agent successfully made interaction to cellulose nanocrystal as confirmed on absorption at wave number 2850 cm-1, 2960 cm-1 and 720 cm-1. Modified At the fixed CTAC concentration of 0.2 mol, the best mechanical properties of CNC-PLA composites were obtained in the composition ratio of 90: 10 with tensile strength of 26.295 MPa, elongation break of 68.18%, and Young modulus of 0.387 Gpa. The greater the CTAC added to nanocrystal cellulose, the lower the reinforcement value and the less reduction. Based on the results of morphology surface characterization, PLA surfaces required for degradation were obtained.
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Keywords: CTAC; cellulose nanocrystalline; polylactic acid, mechanical properties

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