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Journal : Jurnal Teknologi Industri Pertanian

NANOHIDROGEL TAPIOKA MENGGUNAKAN EPIKLOROHIDRIN SEBAGAI AGEN PENGIKAT SILANG Mersi Kurniati, Christina Winarti, Firda Aulya Syamani, Indah Puspita
Jurnal Teknologi Industri Pertanian Vol. 29 No. 2 (2019): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2019.29.2.213

Abstract

Natural polymer-based nanohydrogel, like starches, promises superior properties such as more eco-friendly, and cheaper prices because their raw materials are available naturally in abundant quantities compared to synthetic polymers. To obtain synthetic approaching characteristics, natural polymers need to be modified to improve their mechanical stability. Research has been conducted to develop the hydrogel prepared from acid hydrolysed starch for 2 hours and 24 hours. The process of synthesising nanoparticles from hydrolyzed tapioca starch was done through the precipitation of ethanol. Synthesis of nanohydrogel was conducted by crosslinking methods using epichlorohydrin (Ech.) 5, 10, and 20%. Result showed that the particle size of tapioca nanohydrogel ranging from 14.97 – 492.7 nm. The most optimum treatment was nanohidrogel resulted from 2 hours hydrolyzed tapioca with 5% Ech. concentration, resulting swelling power, gel fraction, and texture of  357.02 %, 77,71 %, and 5.61 mJ, respectively. Nanohydrogel is promising material as carrier matrix for agrochemical as well as fertilizer. Keywords : epichlorohydrin, nanohydrogel, tapioca
SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI AMPAS JARAK KEPYAR Mersi Kurniati, Ika Amalia Kartika, Farah Fahma, Titi Candra Sunarti, Kaswar Syamsu, Dede Hermawan T
Jurnal Teknologi Industri Pertanian Vol. 24 No. 2 (2014): Jurnal Teknologi Industry Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK   The castor cake meal was a by-product of castor oil production and its has recently been highly rated as a source of raw material for particle board, because beyond its high protein content (32-48%)  and fibre (28-33%). The objective of this research was to produce and investigate the physical and mechanical properties of the particle board from castor cake meal. Particle board samples were manufactured using hot pressing temperatures (150-1900C), pressing time (4-12 minutes), compressed using a pressure  (140-220 kg/cm2) with  particles size of 20-100 mesh. The central composite design (CCD) method and ANOVA (α=0.05) with  response surface method (RSM) were used to evaluate production of the particle board. The physical and mechanical properties of particle board  were determined based on Japanese Industrial Standards, JIS A 5908-2003 type-8. The experimental results showed that the pressing process conditions affected the physical and mechanical properties of particle board. The particle size were significant factor for moisture content, density, water absorption and thickness swelling, pressing temperature were significant factors for modulus of elasticity,modulus of rupture and internal bonding of particle board. The smaller particle size (20 to 60 mesh) and the higher pressing temperature (150 to 1700C), increased moisture content, density, modulus of elasticity, modulus of rupture,  and bonding strength and decreased water absorption  and thickness swelling of particle board. Physical and mechanical properties obtained from the best process conditions at a temperature of 1700C, time of 8 minutes, pressure of 180 kgf/cm2 and 60 mesh particle size. Based on the overall results, the physical and mechanical properties of particle board did not met requirement of the JIS A 5908-2003 except for moisture content, density and internal bonding. Keywords: castor cake meal, particle board, modulus of elasticity,modulus of rupture, internal bonding