Thermal and Structural Characterization of Nanofibers of Poly(Vinyl Alcohol) Produced by Electrospinning

被引:34
作者
Guerrini, Lilia M. [1 ]
de Oliveira, Mauricio P. [2 ]
Branciforti, Marcia C. [1 ]
Custodio, Tassiana A. [1 ]
Bretas, Rosario E. S. [1 ]
机构
[1] Univ Fed Sao Carlos, Dept Mat Engn, Sao Paulo, Brazil
[2] Hexion Quim Ind e Com SA, R&D, Sao Paulo, Brazil
基金
巴西圣保罗研究基金会;
关键词
electrospinning; poly(vinyl alcohol); nanofibers; characterization; FUNCTIONAL MODIFICATION; PVA; COPOLYMERIZATION; MORPHOLOGY; POLYMER; FIBERS;
D O I
10.1002/app.29673
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(vinyl alcohol) (PVOH) was obtained from the alkaline hydrolysis of poly(vinyl acetate) (PVAc). Nonwoven membranes (mats) of PVOH nanofibers were produced by electrospinning of solutions of PVOH in water with and without aluminum chloride. The concentration of the PVOH/water solution was 12.4% w/v. The morphology of the mats was analyzed by scanning electron microscopy (SEM). The thermal properties and the degree of crystallinity of the nanofibers were measured by differential scanning calorimetry (DSC); the crystal structure of the mats was evaluated by wide-angle X-ray diffraction. The best nanofibers were obtained by electrospinning the PVOH/water solution with aluminum chloride (45% w/v) in which an electrical field of 3.0 kV/cm was applied. It was observed that the addition of the aluminum chloride and the increase in the applied electrical field decreased the number-average nanofibers diameters. The mats without aluminum chloride had higher melting temperatures and higher degrees of crystallinity than the mats with the salt. The crystal structure of the mats was found to be monoclinic; however, the mats were neither highly oriented nor have a high degree of crystallinity. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 1680-1687, 2009
引用
收藏
页码:1680 / 1687
页数:8
相关论文
共 40 条
[1]  
Brandrup J., 1999, Polymer Handbook, VII
[2]   Fiect of organosoluble salts on the nanofibrous structure of electrospun poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [J].
Choi, JS ;
Lee, SW ;
Jeong, L ;
Bae, SH ;
Min, BC ;
Youk, JH ;
Park, WH .
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 2004, 34 (04) :249-256
[3]  
CUSTODIO TA, 2007, ANN M POL PROC SOC P
[4]   Controlled deposition of electrospun poly(ethylene oxide) fibers [J].
Deitzel, JM ;
Kleinmeyer, JD ;
Hirvonen, JK ;
Tan, NCB .
POLYMER, 2001, 42 (19) :8163-8170
[5]   Electrospinning of polyurethane fibers [J].
Demir, MM ;
Yilgor, I ;
Yilgor, E ;
Erman, B .
POLYMER, 2002, 43 (11) :3303-3309
[6]   Preparation and characterization of a nanoscale poly(vinyl alcohol) fiber aggregate produced by an electrospinning method [J].
Ding, B ;
Kim, HY ;
Lee, SC ;
Shao, CL ;
Lee, DR ;
Park, SJ ;
Kwag, GB ;
Choi, KJ .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2002, 40 (13) :1261-1268
[7]  
DOSHI J, 1995, J ELECTROSTAT, V35, P151, DOI 10.1016/0304-3886(95)00041-8
[8]   Generation of electrospun fibers of nylon 6 and nylon 6-montmorillonite nanocomposite [J].
Fong, H ;
Liu, WD ;
Wang, CS ;
Vaia, RA .
POLYMER, 2002, 43 (03) :775-780
[9]  
Forhals A., 1934, PROCESS AND APPARATUS FOR PREPARINGARTIFICIAL THREADS, Patent No. [US1975504A, 1975504]
[10]  
GUERRINI LM, 2006, WORLD POL C MACR RIO