Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (12): 28-33.doi: 10.13475/j.fzxb.20210203306

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polylactic acid nanofibrous membrane reinforced by reduced graphene oxide

WANG Shudong1,2,3(), DONG Qing2,4, WANG Ke1, MA Qian1   

  1. 1. School of Textile and Clothing, Yancheng Polytechnic College, Yancheng, Jiangsu 224005, China
    2. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215002, China
    3. Jiangsu Jinmaisui New Energy Technology Co., Ltd., Yancheng, Jiangsu 224013, China
    4. Overseas Chinese Academy of Chiway Suzhou, Suzhou, Jiangsu 215021, China
  • Received:2021-02-15 Revised:2021-09-15 Online:2021-12-15 Published:2021-12-29

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Abstract:

To address the low mechanical strength of the electrospinning polylactic acid (PLA) nanofibrous membrane, reduced graphene oxide (rGO) was dispersed into the spinning solution of PLA and dimethylformamide to fabricate PLA/rGO composite nanofibrous membrane by electrospinning. The rheological properties of the spinning solution, structure and mechanical properties of the composite nanofibrous membrane were characterized and analyzed, and the cytocompatibility of the composite nanofibrous membrane was studied by tetrazolium salt colorimetry evaluation. The results show that rGO is successfully blended into the PLA nanofibers by electrospinning, and rGO is distributed in PLA nanofibrous membrane in an irregular spherical form. The mechanical strength of PLA nanofibrous membrane is significantly improved with the blending of rGO. When the mass fraction of rGO was 0.6%, the breaking strength of the composite nanofibrous membrane reached 2.02 MPa, which is 2.3 times higher than that of the pure PLA nanofibrous membrane. After 1, 3 and 7 d culturing, the mouse embryonic osteoblasts displayed growth and proliferation on the composite nanofibrous membrane, which indicates that the PLA/rGO composite nanofibrous membrane offers good cytocompatibility.

Key words: electrospinning, polylactic acid nanofibrous membrane, reduced graphene oxide, cytocompatibility

CLC Number: 

  • TS102.512

Fig.1

Diagrammatic sketch of preparation of electrospinning PLA/rGO blended nanofibrous membrane"

Fig.2

Morphology (a) and rheological property (b) of PLA/rGO blended spinning solution"

Fig.3

SEM images of PLA/rGO blended nanofibrous membrane with different mass fraction of rGO(×5 000)"

Fig.4

TEM images of rGO and PLA/rGO blended nanofibrous membrane. (a) Low resolution image of rGO; (b) High resolution image of rGO; (c) Low resolution image of 4#; (d) High resolution image of 4#"

Fig.5

Raman spectra of PLA/rGO blended nanofibrous membrane with different mass fraction of rGO"

Fig.6

Mechanical property of PLA/rGO blended nanofibrous membrane"

Tab.1

Mechanical property of PLA/rGO blended nanofibrous membrane"

样品
编号		 断裂
强度/MPa		 断裂伸
长率/%		 弹性模
量/MPa
1# 0.88±0.12 57.53±4.28 1.52±0.21
2# 1.01±0.19 55.48±3.61 1.84±0.34
3# 1.43±0.08 48.84±2.85 2.92±0.16
4# 2.02±0.21 41.39±3.32 4.93±0.51

Tab.2

Proliferation of mouse embryonic osteoblasts on PLA and PLA/rGO blended nanofibrous membrane"

培养时
间/d		 支架的吸光度值
1# 2# 3# 4#
1 0.091 0.101 0.097 0.115
3 0.136 0.143 0.139 0.225
7 0.197 0.213 0.242 0.304

Fig.7

EDS images of C and O elements on surface of PLA and PLA/rGO blended nanofibrous membrane. (a) C element on surface of 1#; (b) O element on surface of 1#; (c) C element on surface of 2#; (d) O element on of 2#; (e) C element on surface of 3#; (f) O element on surface of 3#; (g) C element on surface of 4#; (h) O element on surface of 4#"

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