Morphological and Structural Changes in Microcrystalline Cellulose from OPEFB by Mechanical Grinding

Humanosphere Science School 2017; 7th International Symposium for a Sustainable Humanosphere

地球科学;经济学

Herawan, T.^1 ; Panjaitan, F.R.^1 ; Yamanaka, S.^2

Research Group for Palm Oil Product Development and Quality Indonesian Oil, Palm Research Institute, IOPRI, Brigjen Katamso 51, Medan

20158, Indonesia^1

College of Environmental Technology, Muroran Institute of Technology, Mizumoto-cho 27-1, Muroran

050-8585, Japan^2

关键词: Crystalline structure;    Laser diffractions;    Low crystallinity;    Mechanical grinding;    Micro-crystalline cellulose;    Oil palm empty fruit bunch (OPEFB);    Planetary ball mill;    Powder morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/166/1/012001/pdf
DOI  :  10.1088/1755-1315/166/1/012001

来源: IOP

【 摘 要 】

Microcrystalline cellulose derived from oil palm empty fruit bunch (OPEFB) was grinded in planetary ball mill with dry state (without solvent) and solvent-assisted (ethanol and acetone). The effect of dry state and solvent-assisted on morphological and structural changes of microcrystalline cellulose were investigated. The structure changes, including particle size, powder morphology, crystalline structure, and molecular structure during the mechanical grinding were investigated by Laser Diffraction Particle Size Analyzer, SEM, XRD and FT-IR, respectively. The original fibrous microcrystalline cellulose was changed into irregular shape with finer micronized particles by dry state and solvent-assisted. SEM results showed that solvent-assisted significantly prevented the agglomeration phenomena during the grinding process, compared to dry state. The crystallinity after 4h solvent-assisted grinding showed fairly low crystallinity, while amorphous characteristic was observed with dry state grinding. The solvent-assisted led the hydrophilic parts of microcrystalline cellulose become stiff during the grinding that might be less deformed, leading to a fairly retain in crystallinity. The finer micronized particles were obtained under acetone-assisted and its crystallinity was fairly kept. XRD results indicated that crystalline form of origin microcrystalline was not changed by mechanical grinding.