Design of lightweight silicone rubber foam for outstanding deformation recoverability based on supercritical CO2 foaming technology

Song, Pengwei; Zhang, Yuan; Luo, Yong; Liao, Xia; Tang, Wenchao; Yang, Jianming; Tian, Chenxu; Li, Guangxian

doi:10.1007/s10853-021-06775-4

Cited by 16 publications

(5 citation statements)

References 44 publications

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“…In addition, the introduction of NiFe 2 O 4 ‐EPCM‐4 also endows MSRFs with smaller pore diameter and higher pore density as confirmed by optical microscope observation (Figure 4), which can increase the difficulty of deformation during compression. [ 45 ] Therefore, it can be considered that the above factors can effectively improve the compressive properties of composite MSRFs.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the introduction of NiFe 2 O 4 -EPCM-4 also endows MSRFs with smaller pore diameter and higher pore density as confirmed by optical microscope observation (Figure 4), which can increase the difficulty of deformation during compression. [45] Therefore, it can be considered that the above factors can effectively improve the compressive properties of composite MSRFs. From the above analysis, it can be seen that MSRF-3 presents the highest enthalpy, excellent thermal reliability, enhanced thermal stability, and outstanding mechanical properties.…”

Section: Thermal Physical Properties and Mechanical Propertiesmentioning

confidence: 99%

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Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

Zhang

Liu

Yang

et al. 2023

Adv Materials Technologies

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Functionalization of phase change capsules is recognized as one of the promising technologies to improve energy efficiency and promote their versatile application. Herein, a new magnetic phase change capsule (NiFe 2 O 4 -encapsulated phase change material (EPCM)) composed of paraffin wax core and SiO 2 -NiFe 2 O 4 double-layer shell is designed. The prepared NiFe 2 O 4 -EPCMs possess sensitive magnetic response, excellent thermal management performance, and enhanced thermal stability. In particular, the representative NiFe 2 O 4 -EPCM-4 has the highest saturation magnetization (8.41 emu • g −1 ) and high enthalpy of 131.2 J • g −1 . Subsequently, NiFe 2 O 4 -EPCM-4 is introduced into silicone rubber foam (SRF) matrix and magnetic composite SRFs (MSRFs) are prepared. The latent heat of MSRF-3 containing 30% NiFe 2 O 4 -EPCM-4 can reach 28.9 J g −1 and there is almost no change even after 200 cycles. In comparison with pure SRF, the tensile strength and compressive strength of MSRF-3 are increased by 167.7% and 941.8%, respectively. Importantly, the electromagnetic interference shielding effectiveness of MSRF-3 is significantly improved from 15.9 to 30.6 dB. Besides, the MSR-3 can achieve an intriguing infrared stealth function for targets both in human body temperature and high temperature environment. Therefore, this work might stimulate people's interest and inspiration in the design and preparation of multifunctional phase change capsules.

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Section: Resultsmentioning

confidence: 99%

Section: Thermal Physical Properties and Mechanical Propertiesmentioning

confidence: 99%

Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

Zhang

Liu

Yang

et al. 2023

Adv Materials Technologies

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“…The XL samples exhibited high stiffness because of their enhanced crystallinity through crosslinking and cryomilling; crosslinking has previously been shown to make PLA stiffer [ 53 ]. However, the XL sample’s stress-strain curve had a lower slope than the SSSP and cryomill stress-strain plots perhaps due to the open-cell nature of the crosslinked foam [ 71 ].…”

Section: Resultsmentioning

confidence: 99%

Polylactic Acid Chemical Foaming Assisted by Solid-State Processing: Solid-State Shear Pulverization and Cryogenic Milling

et al. 2022

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A chemical foaming process of polylactic acid (PLA) was developed via the solid-state processing methods of solid-state shear pulverization (SSSP) and cryogenic milling. Based on the ability of solid-state processing to enhance the crystallization kinetics of PLA, chemical foaming agents (CFA) are first compounded before foaming via compression molding. Specifically, the effects of the pre-foaming solid-state processing method and CFA concentration were investigated. Density reduction, mechanical properties, thermal behavior, and cell density of PLA foams are characterized. Solid-state processing of PLA before foaming greatly increases the extent of PLA foaming by achieving void fractions approximately twice that of the control foams. PLA’s improved ability to crystallize is displayed through both dynamic mechanical analysis and differential scanning calorimetry. The solid-state-processed foams display superior mechanical robustness and undergo low stress relaxation. The cell density of the PLA foams also increases with solid-state processing, especially through SSSP. Additionally, crosslinking of PLA during the pre-foaming processing step is found to result in the greatest enhancement of crystallization but decreased void fraction and foam effectiveness. Overall, SSSP and cryogenic milling show significant promise in improving chemical foaming in alternative biopolymers.

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“…Because supercritical CO 2 (scCO 2 ) foaming does not release any toxic gas, this foaming process and its product are safer and more environmentally friendly than conventional chemical foaming . Moreover, the cellular structure of the polymer foam prepared by scCO 2 could be easily manipulated by controlling foaming parameters or adding fillers. − Although the technology of preparing high-porosity thermoplastic foams using scCO 2 has been quite common, − the use of this green foaming method for silicone rubber foam has only been reported in the last decade, − and it is still a challenge to obtain a high-porosity silicone rubber foam. For one thing, the diffusion coefficient of CO 2 in silicone rubber is much higher than that in other polymers, and the gas escape would be prompt during the foaming process.…”

Section: Introductionmentioning

confidence: 99%

Significantly Enhanced Porosity of Silicone Rubber Nanocomposite Foams via Cross-Linking Structure Regulation and Heterogeneous Nucleation by CNTs for Promising Ultralow-k Dielectrics

Tang

Liao

Shi

et al. 2022

Ind. Eng. Chem. Res.

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Ultralow-k materials with excellent thermal stability and good electrical insulation are urgently required taking into consideration the rapid development of 5G communication systems. Increasing the porosity of materials is the most effective way to reduce their dielectric constant. On this basis, with the help of cross-linking structure regulation and heterogeneous nucleation of CNTs, a polymethyl-vinyl siloxane (PMVS)/CNT foam with porosity up to 93.9% (density, 0.069 g/cm 3 ) was fabricated via supercritical CO 2 foaming. Therefore, promising dielectric properties were observed for the PMVS/CNT foam (0.5 wt % CNTs) with an ultralow dielectric constant (k = 1.52) and a low loss (tan δ = 0.0017) at 1 kHz. Additionally, the PMVS/CNT foams exhibited improved insulativity (R V > 10 14 Ω•cm), prominent thermal stability (T 5 > 444 °C), and good mechanical properties. These excellent PMVS/CNT foams afford a promising ultralow-k dielectric for modern integrated circuit development.

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Design of lightweight silicone rubber foam for outstanding deformation recoverability based on supercritical CO2 foaming technology

Cited by 16 publications

References 44 publications

Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

Polylactic Acid Chemical Foaming Assisted by Solid-State Processing: Solid-State Shear Pulverization and Cryogenic Milling

Significantly Enhanced Porosity of Silicone Rubber Nanocomposite Foams via Cross-Linking Structure Regulation and Heterogeneous Nucleation by CNTs for Promising Ultralow-k Dielectrics

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