Bead Gel sebagai Controlled Release Urea : Pengaruh Konsentrasi Crosslinker Glutaraldehid

Rara Ayu Lestary, Laili Nurin Jazlina, Sperisa Distantina


The structure of carboxymethylcellulose (CMC)-carrageenan mixture was chemically modified using glutaraldehyde in order to prepare bead hydrogel form. The obtained beads gel were applied to control the urea release rate. The aim of this research was to compose mathematical model describing the mass transfer rate of urea release and determine the effect of concentration glutaraldehid on the bead gel endurance in water as medium release. The bead gels (CMC/carrageenan mass ratio =1 and 2)  were physic crosslinked with CaCl2 solution and then followed by chemically crosslinked with glutaraldehyde solution (4% & 1%) using immersion method and thermal curing at 110oC for 25 minutes. After being washed and dried, the beads gel were immersed in urea solution. The rate release of urea from dried crosslinked beads gel in water was determined by measuring the concentration of urea in various time of immersion. The result showed that the mathematical model arranged could describe the mass transfer rate of urea release. The higher glutaraldehid concentration on beads gel, the higher beads gel endurance in water.


Carboxymethylcellulose/Carrageenan, Beads gel, Crosslinking, Glutaraldehid

Full Text:



Article Metrics

Abstract view : 119 times
PDF - 87 times


  • There are currently no refbacks.

Abstracted/Indexed by:

CHEMICA: Jurnal Teknik Kimia
ISSN: 2355-875X (print) 2355-8776(online)
Organized by Chemical Engineering Department - Universitas Ahmad Dahlan
Published by Universitas Ahmad Dahlan
Email 1:
Email 2:

View CHEMICA stat

Lisensi Creative Commons

This work is licensed under a Commons Attribution-ShareAlike 4.0 International License.