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Nanocomposite films based on xylan-rich hemicelluloses and cellulose nanofibers with enhanced mechanical properties.
Biomacromolecules. 2011 Sep 12; 12(9):3321-9.B

Abstract

Interest in xylan-rich hemicelluloses (XH) film is growing, and efforts have been made to prepare XH films with improved mechanical properties. This work described an effective approach to produce nanocomposite films with enhanced mechanical properties by incorporation of cellulose nanofibers (CNFs) into XH. Aqueous dispersions of XH (64-75 wt %), sorbitol (16-25 wt %), and CNF (0-20 wt %) were cast at a temperature of 23 °C and 50% relative humidity. The surface morphology of the films was revealed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The thermal properties and crystal structure of the films were evaluated by thermal analysis (TG) and X-ray diffraction (XRD). The surface of XH films with and without CNF was composed primarily of nanonodules, and CNFs were embedded in the XH matrix. Freeze-dried XH powder was amorphous, whereas the films with and without CNF showed a distinct peak at around 2θ = 18°, which suggested that XH molecules aggregated or reordered in the casting solution or during water evaporation. Furthermore, the nanocomposite films had improved thermal stability. XH film with 25 wt % plasticizer (sorbitol, based on dry XH weight) showed poor mechanical properties, whereas incorporation of CNF (5-20 wt %, based on the total dry mixture) into the film resulted in enhanced mechanical properties due to the high aspect ratio and mechanical strength of CNF and strong interactions between CNF and XH matrix. This effective method makes it possible to produce hemicellulose-based biomaterials of high quality.

Authors+Show Affiliations

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, 510640, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21815695

Citation

Peng, Xin-wen, et al. "Nanocomposite Films Based On Xylan-rich Hemicelluloses and Cellulose Nanofibers With Enhanced Mechanical Properties." Biomacromolecules, vol. 12, no. 9, 2011, pp. 3321-9.
Peng XW, Ren JL, Zhong LX, et al. Nanocomposite films based on xylan-rich hemicelluloses and cellulose nanofibers with enhanced mechanical properties. Biomacromolecules. 2011;12(9):3321-9.
Peng, X. W., Ren, J. L., Zhong, L. X., & Sun, R. C. (2011). Nanocomposite films based on xylan-rich hemicelluloses and cellulose nanofibers with enhanced mechanical properties. Biomacromolecules, 12(9), 3321-9. https://doi.org/10.1021/bm2008795
Peng XW, et al. Nanocomposite Films Based On Xylan-rich Hemicelluloses and Cellulose Nanofibers With Enhanced Mechanical Properties. Biomacromolecules. 2011 Sep 12;12(9):3321-9. PubMed PMID: 21815695.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanocomposite films based on xylan-rich hemicelluloses and cellulose nanofibers with enhanced mechanical properties. AU - Peng,Xin-wen, AU - Ren,Jun-li, AU - Zhong,Lin-xin, AU - Sun,Run-cang, Y1 - 2011/08/17/ PY - 2011/8/6/entrez PY - 2011/8/6/pubmed PY - 2012/1/11/medline SP - 3321 EP - 9 JF - Biomacromolecules JO - Biomacromolecules VL - 12 IS - 9 N2 - Interest in xylan-rich hemicelluloses (XH) film is growing, and efforts have been made to prepare XH films with improved mechanical properties. This work described an effective approach to produce nanocomposite films with enhanced mechanical properties by incorporation of cellulose nanofibers (CNFs) into XH. Aqueous dispersions of XH (64-75 wt %), sorbitol (16-25 wt %), and CNF (0-20 wt %) were cast at a temperature of 23 °C and 50% relative humidity. The surface morphology of the films was revealed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The thermal properties and crystal structure of the films were evaluated by thermal analysis (TG) and X-ray diffraction (XRD). The surface of XH films with and without CNF was composed primarily of nanonodules, and CNFs were embedded in the XH matrix. Freeze-dried XH powder was amorphous, whereas the films with and without CNF showed a distinct peak at around 2θ = 18°, which suggested that XH molecules aggregated or reordered in the casting solution or during water evaporation. Furthermore, the nanocomposite films had improved thermal stability. XH film with 25 wt % plasticizer (sorbitol, based on dry XH weight) showed poor mechanical properties, whereas incorporation of CNF (5-20 wt %, based on the total dry mixture) into the film resulted in enhanced mechanical properties due to the high aspect ratio and mechanical strength of CNF and strong interactions between CNF and XH matrix. This effective method makes it possible to produce hemicellulose-based biomaterials of high quality. SN - 1526-4602 UR - https://www.unboundmedicine.com/medline/citation/21815695/Nanocomposite_films_based_on_xylan_rich_hemicelluloses_and_cellulose_nanofibers_with_enhanced_mechanical_properties_ L2 - https://doi.org/10.1021/bm2008795 DB - PRIME DP - Unbound Medicine ER -