Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (11): 75-80.doi: 10.13475/j.fzxb.20210600306

• Textile Engineering • Previous Articles     Next Articles

Preparation and properties of shape-memory composites reinforced by carbon fabrics

SU Ziyue1, SHAN Yingfa2, WU Yingzhu1(), QIN Jieyao1, PENG Meiting1, WANG Xiaomei1, HUANG Meilin1   

  1. 1. School of Textile Materials and Engineering, Wuyi University, Jiangmen, Guangdong 529020, China
    2. Guangzhou Cndong Materials Co., Ltd., Guangzhou, Guangdong 510000, China
  • Received:2021-06-01 Revised:2022-05-10 Online:2022-11-15 Published:2022-12-26
  • Contact: WU Yingzhu E-mail:wuyingzhu111@163.com

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Abstract:

In order to solve the impact of catalysts in a carbon fabric-based shape-memory composite system on its recycling performance, an epoxy-anhydride system (BMT) based on dynamic transesterification to provide the shape-memory function was adopted, and a polyhydroxy reactive monomer trimethylolpropane (TMP) as the reactive agent was combine with the carbon fabric to prepare a catalyst-free and regulable shape-memory composite. The results show that the polyhydroxy catalytic composite (C-BMT) not only displays a good shape-memory ability, and its physical properties are also excellent, especially its tensile strength is 24 time higher than that of the BMT system. In addition, there is no catalyst in the composite, which simplifies the recycling of the composites. The research is of great significance for the future development and for recycling of high-performance carbon fiber fabric matrix composites.

Key words: dynamic chemical bond, polyhydroxy catalysis, shape-memory, carbon fabric, composite

CLC Number: 

  • TB33

Tab.1

BMT curing system formulas with different molar ratios"

样品编号 BPA/moL MHHPA /moL TMP/moL
BMT-1 1 1 0.3
BMT-2 1 1 0.4
BMT-3 1 1 0.5

Fig.1

Test process of shape recovery rate"

Fig.2

Exothermic situation of BMT-3 system"

Tab.2

Thermogravimetric data corresponding to BMT system"

样品 BMT固化体系配比 Td5/℃
BMT-1 1/1/0.3 284
BMT-2 1/1/0.4 274
BMT-3 1/1/0.5 271

Fig.3

Thermogravimetric curve of BMT system"

Fig.4

Dissipation coefficient (a) and storage modulus (b) of BMT system"

Tab.3

Dynamic mechanical properties of BMT system"

样品 Eg/MPa Er /MPa Tg /℃
BMT-1 2 520 11.3 100
BMT-2 2 060 5.2 94
BMT-3 1 794 3.6 91

Fig.5

Stress relaxation (a) and self-repair (b) of BMT system"

Tab.4

Mechanical tensile properties of BMT system"

样品 拉伸强度/MPa 拉伸模量 /MPa 断裂伸长率/%
BMT-1 60 2400 4.55
BMT-2 54 2250 3.47
BMT-3 49 2180 3

Fig.6

Shape fixation rate of BMT system"

Tab.5

Shape recovery performance of BMT specimens (Tg+10 ℃)"

样品 形变回复时间/s 形变回复率/%
BMT-1 174 100
BMT-2 161 100
BMT-3 144 100

Tab.6

Deformation recovery time at different temperatures of BMT system"

样品 Tg /℃ (Tg+10)/℃ (Tg+20)/℃
BMT-1 190 174 157
BMT-2 180 161 143
BMT-3 157 144 135

Fig.7

Dissipation coefficient (a) and storage modulus (b) of C-BMT composite"

Tab.7

Mechanical tensile properties of C-BMT composite materials"

样品 拉伸强度/MPa 拉伸模量 /MPa 断裂伸长率/%
C-BMT-1 1 780 26 670 6.45
C-BMT-2 1 517 25 260 5.37
C-BMT-3 1 160 23 140 5.11
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