Thermal-aging constitutive model for a silicone rubber foam under compression

Lou, Weitao; Xie, Cheng; Guan, Xuefei

doi:10.1016/j.polymdegradstab.2022.109873

Cited by 18 publications

(5 citation statements)

References 30 publications

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“…22,36 The scheme for amylose is shown in Figure 1a, where each α-D-glucose unit is bonded to each other through α the peak at 1410 cm −1 corresponds to CH 2 rocking vibration, and the peak at 2960 cm −1 shows that C−H symmetric stretching vibration is present in CH 3 . 38 The FTIR spectra also carry all the peaks responsible for the corresponding functional groups of starch; apparently, those are not visible due to the very low peak intensity except the broad band ranging from 3100 to 3600 cm −1 , which corresponds to the hydroxyl group (−OH) present in the starch gel and hence in the composite SGCs, as shown in the magnified view inset of Figure 1F. 22 So, the FTIR spectra for intrinsic silicone foam and SGC 5, SGC 10, SGC 15, and SGC 20 certainly carry all the peaks corresponding to the respective functional groups of corn starch gel and silicone foam.…”

Section: Resultsmentioning

confidence: 99%

“…The FTIR spectra of intrinsic silicone foam and SGC 5, SGC 10, SGC 15, and SGC 20 are depicted in Figure f. The peak at 790 cm –1 corresponds to Si–C stretching vibration and CH 3 rocking vibration in Si–CH 3 , the peak at 864 cm –1 corresponds to Si–CH 3 rocking vibration, the peak at 1010 and 1060 cm –1 corresponds to stretching vibrations of Si–O–Si, peak at 1255 cm –1 conveys the presence of bending vibration of Si–CH 3 , the peak at 1410 cm –1 corresponds to CH 2 rocking vibration, and the peak at 2960 cm –1 shows that C–H symmetric stretching vibration is present in CH 3 . The FTIR spectra also carry all the peaks responsible for the corresponding functional groups of starch; apparently, those are not visible due to the very low peak intensity except the broad band ranging from 3100 to 3600 cm –1 , which corresponds to the hydroxyl group (−OH) present in the starch gel and hence in the composite SGCs, as shown in the magnified view inset of Figure F .…”

Section: Resultsmentioning

confidence: 99%

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Corn Starch-Derived Gel for High-Performance Triboelectric Nanogenerators

Kamilya,

Shin,

Cho

et al. 2023

ACS Appl. Polym. Mater.

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Starch is a material of wide research interest across various disciplines to understand its nature under different circumstances. Herein, we report corn starch gel as a tribo material whose incorporation into silicone foam can enhance the electrical output of a triboelectric nanogenerator (TENG) over 100% compared to the output of a TENG developed using intrinsic silicone foam. The study is carried out by varying the incorporation of different mass ratios of corn starch gel into silicone foam and prepared a starch gel composite (SGC). The composite material SGC with a mass ratio of 1:1.02 of corn starch gel and silicone foam produces the highest output voltage of ∼280 V compared to the output voltage of 132 V of a TENG developed using intrinsic silicone foam. It delivers a output current of 6.9 μA and a peak power of 897 μW corresponding to a power density of 996 mW/m 2 . Furthermore, the potential of real-time applications of TENG using SGC (c-TENG) has been demonstrated through powering up of light-emitting diodes, charging some commercial capacitors, and healthcare sensing applications. The device is highly stable, as over 15,000 cycles, it gives a constant output voltage of ∼280 V. The enhanced electrical output and stability of the device opens up the possibility of further research in the field of TENG using a composite material of starch for high-voltage self-powered applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Corn Starch-Derived Gel for High-Performance Triboelectric Nanogenerators

Kamilya,

Shin,

Cho

et al. 2023

ACS Appl. Polym. Mater.

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“…It can be seen that the weight loss of SRF is divided into three stages. The first stage (240-330 • C) is the breaking of the main chain, which forms the cyclic siloxane in the process [34,35]. The second stage (330-475 • C) is the decomposition of side chains [36].…”

Section: Effect Of a Crosslinking Agent On The Thermal Stability Of Srfmentioning

confidence: 99%

The Effects of a Crosslinking Agent on the Microrheological Properties and Cellular Structure of Silicone Rubber Foam Prepared via a Green Process

He,

Li,

Liu

et al. 2024

Materials

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Chemical foaming technology is widely used in the preparation of silicone rubber foam and is attributable to its one-step molding capability and eco-friendly production processes. The microrheological properties of silicone rubber play a pivotal role during the foaming process. In this study, Rheolaser Lab (Formulaction, Toulouse, France) was used to conduct in situ examinations for the influence of a crosslinking agent on the microrheological properties of silicone rubber foam for the first time. This study monitors the entire reaction process of silicone rubber foam from liquid to solid, as well as the matching of crosslinking and foaming reactions. Various parameters, including solid–liquid balance, elasticity index, and macroscopic viscosity index, are measured to analyze the microrheological properties of silicone rubber foam. The results show that the silicone rubber foam exhibits good microrheological properties, thereby demonstrating excellent performance at a crosslinking agent content of 2%. Through adjusting the experimental conditions, a sustainable and efficient approach was proposed for better cellular structure control in the industrial preparation of silicone rubber foam.

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“…Recently, these models have also been employed to represent the mechanical behavior of hydrogels and their composites [29,30], while refined hyperelastic models such as the hyperfoam model can accurately describe polymeric foam fabricated through 3D printing [31]. It is worth noting that factors like temperature and aging time may influence the model parameters [32]. The following section will provide a brief introduction to three typical models.…”

Section: Constitutive Model Of Hyperelastic Membrane Based On Equibia...mentioning

confidence: 99%

Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials

Luo,

Zhu,

Zhao

et al. 2023

Polymers

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For rubber-like materials, there are three popular methods of equibiaxial tension available: inflation tension, equibiaxial planar tension, and radial tension. However, no studies have addressed the accuracy and comparability of these tests. In this work, we model the tension tests for a hyperelastic electroactive polymer (EAP) membrane material using finite element method (FEM) and investigate their experimental accuracy. This study also analyzes the impact of apparatus structure parameters and specimen dimensions on experimental performances. Additionally, a tensile efficiency is proposed to assess non-uniform deformation in equibiaxial planar tension and radial tension tests. The sample points for calculating deformation in inflation tensions should be taken near the top of the inflated balloon to obtain a more accurate characteristic curve; the deformation simulation range will be constrained by the material model and its parameters within a specific limit (λ ≈ 1.9); if the inflation hole size is halved, the required air pressure must be doubled to maintain equivalent stress and strain values, resulting in a reduction in half in inflation height and decreased accuracy. The equibiaxial planar tension test can enhance uniform deformation and reduce stress errors to as low as 2.1% (at λ = 4) with single-corner-point tension. For circular diaphragm specimens in radial tension tests, increasing the number of cuts and using larger punched holes results in more uniform deformation and less stress error, with a minimum value of 3.83% achieved for a specimen with 24 cuts and a 5 mm punched hole. In terms of tensile efficiency, increasing the number of tensile points in the equibiaxial planar tension test can improve it; under radial tension, increasing the number of cuts and decreasing the diameter of the punched hole on the specimen has a hedging effect. The findings of this study are valuable for accurately evaluating various equibiaxial tension methods and analyzing their precision, as well as providing sound guidance for the effective design of testing apparatus and test plans.

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Thermal-aging constitutive model for a silicone rubber foam under compression

Cited by 18 publications

References 30 publications

Corn Starch-Derived Gel for High-Performance Triboelectric Nanogenerators

Corn Starch-Derived Gel for High-Performance Triboelectric Nanogenerators

The Effects of a Crosslinking Agent on the Microrheological Properties and Cellular Structure of Silicone Rubber Foam Prepared via a Green Process

Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials

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