Fabrication and Mechanical Properties of Flexible γ-Al2O3 Nanofibrous Membranes

doi:10.7503/cjcu20160853

Abstract

Abstract:

Flexible γ-Al₂O₃ nanofibrous membranes were prepared by sol-gel combined electrospinning technique using aluminum chloride and aluminum isopropoxide as raw materials, water and ethanol as the solvents. The morphology and mechanical property of the membranes were characterized and the formation process was tracked. The membranes were composed of uniform nanofibers with a mean diameter of ca.188 nm. The fibers’ surfaces were smooth and the fibers were composed of nanoparticles with a size range of 15—30 nm. The prepared membranes exhibited excellent flexibility and tensile strength(1.01 MPa).

Key words: Al₂O₃, Fibrous membrane, Mechanical property, Electrospinning

CLC Number:

O614

TrendMD:

LI Wei, ZHAO Xiaomin, WANG Yanfeng, LU Wenjuan, JIA Yuna, JIAO Xiuling, CHEN Dairong, ZHANG Pingping. Fabrication and Mechanical Properties of Flexible γ-Al₂O₃ Nanofibrous Membranes[J]. Chem. J. Chinese Universities, 2017, 38(6): 915.

Figures/Tables 6

Fig.1 TEM image of the colloidal particles

Fig.2 Optical image(A) and optical microscope image(B) of gel fibrous membrane

Fig.3 TG-DSC curves of the gel fibrous membrane(A), XRD patterns(B) and IR spectra(C) of different membranes

Fig.4 Optical images of the γ-Al2O3 fibrous membranes(A) Bending around a pencil; (B) after twining around the pencil.

Fig.5 SEM images of γ-Al2O3 fibrous membranes(A—E) and the diameter distribution of the membrane(F) (A),(C) Surface of the membrane; (B) cross section of the membrane; (D) single fiber’s surface of the membrane;(E) fracture section of a fiber of the membrane.

Fig.6 Tensile strength-strain curves of the xerogel membranes and those calcined at different temperatures

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Fabrication and Mechanical Properties of Flexible γ-Al₂O₃ Nanofibrous Membranes

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