Effect of Particle Size and Crystallinity of Cellulose Filler on the Properties of Poly(L-Lactic Acid): Mechanical Property and Thermal Stability.
In: AIP Conference Proceedings; 2017, Vol. 1840 Issue 1, p1-8, 8p, 1 Black and White Photograph, 2 Diagrams, 1 Chart, 3 Graphs; Jg. 1840 (2017-07-05) 1, S. 1-8
Konferenz
Zugriff:
Two types of cellulose materials were utilized as filler in biodegradable polymer poly(L-lactic acid) (PLLA) to obtain new biocomposite materials with better properties. The physical properties of those biocomposite materials which include transparency, mechanical property, and thermal stability were investigated by using visual observation, dynamic mechanical analysis (DMA), and thermo-gravimetric analysis (TGA), respectively. In this study, two different particle sizes and crystallinity of cellulose were used to show the effect of particle size and crystallinity of cellulose filler on the properties of PLLA. The cellulose materials used in this research include the following: microcrystalline cellulose (MCC) from Avicel and cellulose fiber from rice straw biomass (CF-RS). The filler content in PLLA matrix was adjusted to be varied: 0 wt%, 2.5 wt%, 5 wt%, 7.5 wt%, and 10 wt%. The crystallinity of MCC and CF-RS measured by x-ray diffraction (XRD) shows the value of 70.25% and 34.9%, respectively. The transparency of PLLA/MCC and PLLA/CFRS biocomposite films decrease with the increase in cellulose filler content. However, the transparency of PLLA/MCC biocomposite films is better than that of PLLA/CF-RS biocomposite films because the particle size of MCC filler is smaller than that of CF-RS filler so that the dispersion of the MCC filler in PLLA matrix is also better. The mechanical property in term of tensile strength of two types of biocomposite films decrease with the increasing of cellulose content. The decrease in tensile strength after the addition of cellulose filler is due to the agglomeration of the filler since the adhesion between filler and polymer matrix is weaker than that between each of the filler. Because the dispersion of filler MCC in the PLLA matrix is better than that of filler CF-RS in PLLA matrix, the decrease in tensile strength value of PLLA/MCC films is not significant compare to that of PLLA/CF-RS films. Moreover, the high crystallinity of MCC also has contribution to the strength of biocomposite films. The thermal stability of PLLA enhance after the addition of cellulose filler. The films with CF-RS component show moderate thermal stability compare to the films with MCC component. For highest filler content, the percent weight residue at 400 °C of PLLA/MCC (90/10) and PLLA/CF-RS (90/10) films are 4.35 % and 10.47 %, respectively. [ABSTRACT FROM AUTHOR]
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Titel: |
Effect of Particle Size and Crystallinity of Cellulose Filler on the Properties of Poly(L-Lactic Acid): Mechanical Property and Thermal Stability.
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Autor/in / Beteiligte Person: | Ni'mah, Hikmatun ; Ningrum, Eva Oktavia ; Sumarno ; Nur Rizkiyah, Dwila ; Gede Chandra Divta, I. G. A. ; Meiliefiana ; Subaghio, Mayang Ayudhawara |
Quelle: | AIP Conference Proceedings; 2017, Vol. 1840 Issue 1, p1-8, 8p, 1 Black and White Photograph, 2 Diagrams, 1 Chart, 3 Graphs; Jg. 1840 (2017-07-05) 1, S. 1-8 |
Veröffentlichung: | 2017 |
Medientyp: | Konferenz |
ISSN: | 0094-243X (print) |
DOI: | 10.1063/1.4982317 |
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