Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (02): 34-40.doi: 10.13475/j.fzxb.20200804607

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polyacrylonitrile/carboxyl styrene butadiene latex composite nanofibrous membranes

GUO Xuesong1,2, GU Jiayi1,2, HU Jianchen1,2, WEI Zhenzhen1,2(), ZHAO Yan1,2   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, China
    2. National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
  • Received:2020-08-10 Revised:2020-11-19 Online:2021-02-15 Published:2021-02-23
  • Contact: WEI Zhenzhen E-mail:zzwei@suda.edu.cn

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Abstract:

In order to improve the mechanical properties of electrospun polyacrylonitrile (PAN) nanofiber membranes, a series of PAN/SBR composite nanofibrous membranes were prepared by immersing PAN nanofibrous membranes into carboxyl styrene butadiene latex (SBR) solution. The effects of SBR content on the surface morphology, chemical structure, wettability, thermal and mechanical properties of PAN nanofibrous membranes were investigated. The results reveal that SBR is physically bonded to PAN nanofibers. With the increase of SBR content, the distribution of SBR on the surface of PAN fiber gradually becomes uneven. The addition of SBR has no effect on the thermal stability of PAN membrane, but increases the water contact angle and jeopardizes the hydrophilicity of the membrane. At the same time, adding a small amount of SBR (less than or equal to 15.6%) is found to increase the breaking strength, breaking elongation, initial modulus, breaking energy and puncture resistance of PAN nanofibrous membrane. When the content of SBR is 8.5% of PAN membrane, the breaking energy of the composite membrane is increased by about 4 times, which significantly improves the mechanical properties of PAN nanofiber membrane.

Key words: polyacrylonitrile, carboxyl styrene butadiene latex, electrospinning, nanofibrous membrane, battery separator

CLC Number: 

  • TQ342.93

Fig.1

SEM images of PAN/SBR composite membranes"

Tab.1

Basic parameters of PAN/SBR composite nanofiber membranes"

SBR质量
分数/%		 厚度/
μm		 密度/
(g·cm-3)		 SBR实际质
量分数/%		 孔隙率/
%		 断裂强
度/MPa		 断裂伸长
率/%		 初始模
量/MPa		 断裂能/
(kJ·m-3)		 刺破强
度/cN
PAN 27 0.17 0 82.19 5.88 30.00 85.30 1 189 15.84
0.10 27 0.20 4.91 79.36 6.75 32.25 137.17 1 622 25.32
0.25 27 0.16 6.44 74.72 7.46 32.54 159.18 1 963 24.98
0.50 27 0.29 8.50 77.41 10.91 61.25 232.13 5 420 28.75
1.00 27 0.23 15.67 62.55 12.44 43.16 256.96 4 378 24.98
2.50 27 0.21 32.00 47.64 15.28 22.08 324.66 2 607 25.32

Fig.2

FT-IR spectra of PAN/SBR composite membranes"

Fig.3

TG (a) and DTG (b) curves of PAN/SBR composite membranes"

Fig.4

Water contact angle change of PAN/SBR nanofibrous membranes with contact time of 15 s (a) and 30 s (b)"

Fig.5

Stress-strain curves of PAN/SBR nanofibrous membranes"

Fig.6

Interfacial impedance (a) and bulk impedance (b) spectroscopy of PAN/SBR composite nanofiber membrane"

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