Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 1-7.doi: 10.13475/j.fzxb.20190401407

• Fiber Materials •     Next Articles

Carbodiimide/hydroxysuccinimide crosslinking modification and properties of collagen fibers

YUE Chengfei, DING Changkun(), LI Lu, CHENG Bowen   

  1. Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tiangong University, Tianjin 300387, China
  • Received:2019-04-03 Revised:2019-12-15 Online:2020-03-15 Published:2020-03-27
  • Contact: DING Changkun E-mail:dingchangkun@tiangong.edu.cn

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Abstract:

In order to deal with problems in poor mechanical properties and water-dissolving, a collagen fiber prepared from bovine tendon type I collagen via wet spinning method process was modified by 1-ethyl-3-(3-dimethylpropys carbodiimide/N-hydroxysuccinimide)(EDC/NHS) crosslinking. The optimal reaction time and crosslinking concentration of EDC/NHS in the in-situ crosslinking mode were explored, and the effects of two crosslinking methods of in-situ crosslinking and bath crosslinking on the properties of collagen fibers were compared. The results show that in-situ crosslinking can significantly improve the performance of collagen fibers. The optimum crosslinking time and crosslinker concentration of in-situ crosslinking are 11 h and 15%, respectively. In this situation, the fiber breaking strength reached about 1.44 cN/dtex, which is 35.8% higher than that of the pure collagen fiber and 19.0% higher than that of bath crosslinked fiber. Compared with crosslinking baths that the crosslinking reaction mainly occur on the fiber surface, and in-situ crosslinking makes the microfibrous structure inside the fiber denser and the performance is improved more obviously. Furthermore, the performance of in-situ crosslinked collagen fibers is better than that of bath crosslinked collagen fibers.

Key words: collagen fiber, wet spinning, in-situ crosslinking, bath crosslinking, mechanical properties

CLC Number: 

  • TQ342.94

Fig.1

Crosslinking mechanism of EDC/NHS"

Fig.2

Mechanical properties of collagen fibers at different crosslinking times"

Fig.3

Mechanical properties of collagen fibers with different crosslinker concentrations"

Fig.4

Surface SEM images of collagen fiber surface with different crosslinker concentrations (×900)"

Fig.5

Cross section SEM images of collagen fiber profile with different crosslinker concentrations (×2 000)"

Fig.6

XRD curves of collagen fibers with different crosslinking modes"

Fig.7

Infrared spectra of collagen fibers with different crosslinking modes"

Fig.8

TG curves of collagen fiber with different crosslinking methods"

Tab.1

Contact angle and water absorption of collagen fibers with different crosslinking methods"

纤维名称 单纤维接触角/(°) 吸水率/%
0 s 60 s
纯胶原蛋白纤维 105.0±3.0 78.0±4.0 514.3±22.0
交联浴交联胶原蛋白纤维 117.0±4.0 90.0±3.0 200.0±19.0
原位交联胶原蛋白纤维 120.1±4.0 100.0±3.0 155.6±26.0

Tab.2

Mechanical properties of collagen fibers with different cross-linking methods"

纤维名称 断裂强度/(cN·dtex-1) 断裂伸长率/%
纯胶原蛋白纤维 1.06±0.03 28±2
交联浴交联胶原蛋白纤维 1.21±0.02 33±2
原位交联胶原蛋白纤维 1.44±0.03 42±3
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