期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 131, 期 11, 页码 -出版社
WILEY
DOI: 10.1002/app.40334
关键词
cellulose and other wood products; composites; electrospinning; hydrophilic polymers; nanoparticles; nanowires and nanocrystals
资金
- National Research Initiative of the USDA Cooperative State Research, Education, and Extension Service [2007-35504-18290, 2008-35504-19203]
- LignoCell project under the auspices of Finland's Tekes
- Academy of Finland
Acid-catalyzed vapor phase esterification with maleic anhydride was used to improve the integrity and thermo-mechanical properties of fiber webs based on poly(vinyl alcohol), PVA. The fibers were produced by electrospinning PVA from aqueous dispersions containing cellulose nanocrystals (CNCs). The effect of esterification and CNC loading on the structure and solvent resistance of the electrospun fibers was investigated. Chemical characterization of the fibers (FTIR, NMR) indicated the formation of ester bonds between hydroxyl groups belonging to neighboring molecules. Thermomechanical properties after chemical modification were analyzed using thermal gravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. An 80% improvement in the ultimate strength was achieved for CNC-loaded, crosslinked PVA fiber webs measured at 90% air relative humidity. Besides the ultra-high surface area, the composite PVA fiber webs were water resistant and presented excellent mechanical properties. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40334.
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