Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (6): 1548-1554.doi: 10.13229/j.cnki.jdxbgxb.20220878

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Effect of soft carbon black on properties of natural rubber-based magnetorheological elastomers

Yi LI1(),Tian-bao LIU1,Shao-qiang WANG2(),Ji-cai LIANG1   

  1. 1.College of Materials Science and Engineering，Jilin University，Changchun 130022，China
    2.School of Computer Science and Technology，Changchun University，Changchun 130022，China
  • Received:2022-07-12 Online:2024-06-01 Published:2024-07-23
  • Contact: Shao-qiang WANG E-mail:henrylee@jlu.edu.cn;wangsq@ccu.edu.cn

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Abstract:

Using natural rubber as the matrix， four magnetorheological elastomers （MREs） were fabricated using soft carbon black and carbonyl iron powder. Their microstructures were observed by using the field emission scanning electron microscope （SEM）， and their mechanical properties including magnetorheological（MR）effects were observed and analyzed by the electronic universal testing machine and the advanced rotational rheometer. Experimental results show that the addition of carbon black increases the tensile strength and 300% constant tensile force of MREs. Furmore the carbon black changes the Mullins effect of MREs under low strain conditions， and MREs with the carbonyl iron powder content of 30% volume fraction increased their MR effect by three times after the addition of carbon black. The performance of MREs can be improved greatly by using soft carbon black as a reinforcing agent.

Key words: magnetorheological elastomers, soft carbon black, microstructures, mechanical performances, reinforce agent

CLC Number: 

  • TG386

Table 1

Unit volume fraction of sample prepared"

样品组成样品1样品2样品3样品4
羰基铁粉/%0153030
炭黑体积/%1010100
橡胶基体和其他添加剂/%90756070

Fig.1

A field emission scanning electron microscope"

Fig.2

Electronic universal testing machine and test sample"

Fig.3

Advanced rotational rheometer"

Fig.4

Microstructure of the samples observed by a field emission scanning electron microscope"

Fig.5

Histogram of mechanical properties of different samples"

Fig.6

Tensile curve of a single-axis cycle test"

Fig.7

Shear storage modulus of the samples with different components and different magnetic flux density"

Table 2

The MR effect of each sample"

样品G0/MPaGmax/MPa（Gmax- G0）/ G0（%）
10.3580.371<4
21.4101.5328.65
31.9442.72340.07
41.6231.83413.91
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