Improved Mechanical and Sound Absorption Properties of Open Cell Silicone Rubber Foam with NaCl as the Pore-Forming Agent

Peng, Longgui; Lei, Lei; Liu, Yongqiang; Du, Lifei

doi:10.3390/ma14010195

Cited by 15 publications

(14 citation statements)

References 19 publications

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“…[2], so the production of synthetic cellular materials was devoted to mimic nature leading to the development of one of the most important and widely used man-made class of materials with a wide range of applications in automobiles, aeronautics, packaging, medicine, construction, etc. [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Chemistry, Processing, Properties, and Applications of Rubber Foams

Rostami‐Tapeh‐Esmaeil

Vahidifar

Esmizadeh

et al. 2021

Polymers

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With the ever-increasing development in science and technology, as well as social awareness, more requirements are imposed on the production and property of all materials, especially polymeric foams. In particular, rubber foams, compared to thermoplastic foams in general, have higher flexibility, resistance to abrasion, energy absorption capabilities, strength-to-weight ratio and tensile strength leading to their widespread use in several applications such as thermal insulation, energy absorption, pressure sensors, absorbents, etc. To control the rubber foams microstructure leading to excellent physical and mechanical properties, two types of parameters play important roles. The first category is related to formulation including the rubber (type and grade), as well as the type and content of accelerators, fillers, and foaming agents. The second category is associated to processing parameters such as the processing method (injection, extrusion, compression, etc.), as well as different conditions related to foaming (temperature, pressure and number of stage) and curing (temperature, time and precuring time). This review presents the different parameters involved and discusses their effect on the morphological, physical, and mechanical properties of rubber foams. Although several studies have been published on rubber foams, very few papers reviewed the subject and compared the results available. In this review, the most recent works on rubber foams have been collected to provide a general overview on different types of rubber foams from their preparation to their final application. Detailed information on formulation, curing and foaming chemistry, production methods, morphology, properties, and applications is presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Chemistry, Processing, Properties, and Applications of Rubber Foams

Rostami‐Tapeh‐Esmaeil

Vahidifar

Esmizadeh

et al. 2021

Polymers

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“…The porous Si 3 N 4 -based ceramics are potential radome materials due to their high strength and porosity; thus, these ceramics have received a considerable research attention in recent years [11,12]. A number of research studies have focused on preparing porous Si 3 N 4 -based ceramics using different methods, such as addition of pore-forming agent, organic foam impregnation, and sol-gel methods [13][14][15]. Zhang [16] reported the successful synthesis of porous Si 2 N 2 O-Si 3 N 4 multiphase ceramics by using the silica-hollow microspheres as the source of SiO 2 and pore-forming agent.…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous β-SiAlON ceramics using corn starch as pore-forming agent

Liu

Chen

et al. 2022

J Aust Ceram Soc

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In this study, porous β-SiAlON ceramics were prepared by starch consolidation using corn starch as a pore-forming agent. The effect of corn starch content (10 wt.%, 20 wt.%, and 30 wt.%) on the microstructure, apparent porosity, compressive strength, and dielectric properties of porous β-SiAlON ceramics was investigated. It was observed that both β-SiAlON and corundum phases were present in the prepared porous β-SiAlON ceramics. Meanwhile, the SEM results revealed that the hierarchical pore structures were formed as the corn content was enhanced. Increasing the corn starch content from 10 to 30 wt.% enhanced the apparent porosity from 53 to 64%, whereas the compressive strength decreased from 6.5 to 3.8 MPa. The porous β-SiAlON ceramics consisting of 60 wt.% solid content and 30 wt.% corn starch possessed porosity of 64%, reasonable compressive strength of 3.8 MPa, low dielectric constant of 3.0, and low dielectric loss tangent of 0.0046. Overall, the obtained results confirm that the starch consolidation method is a simple and convenient approach for preparing porous β-SiAlON ceramics with potential application in the field of radome.

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“…Compared with traditional indoor sound absorption and noise reduction materials, such as polyurethane foam and polyvinyl chloride foam, addition liquid silicone rubber 15 develops faster than free radical cross-linked liquid silicone rubber and polycondensation liquid silicone rubber, and has the advantages of simple preparation process, easy implementation, and no by-products of vulcanization. 13,16 Additionally, liquid silicone rubber has better fluidity than mixed silicone rubber, and can be injection molded and compression molded, and the vulcanization rate is controllable.…”

Section: Introductionmentioning

confidence: 99%

“…The porous liquid silicone rubber material prepared by introducing a foaming agent into the liquid silicone rubber has the advantages of softness, light weight, high resilience rate, controllable cell size and density, easy implementation, corrosion resistance, weather resistance, etc., which is suitable for sound absorption and noise reduction in most indoor and outdoor environments. 13,15,16,[18][19][20][21] Additionally, introducing chemical foaming agents into the liquid silicone rubber, such as foaming agents or pore formers, foamed material with countless cells could be prepared after different processes. Different types of cell structures (closed, open, and mixed cell structures) could be achieved by adjusting the hydrogen-containing silicone oil, and the cell size can also be tailored.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved low-frequency sound absorption of porous silicone rubber resonance sheet with periodic cavities

Peng

Zhao

Cheng

et al. 2022

Journal of Low Frequency Noise, Vibration and Active Control

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Since the development of advanced sound absorption material is highly critical in noise control applications, anechoic coatings, and acoustic metamaterials, both fabrication technology and structure design are significant in the achievement of broadband and strong absorption performance in the low sound frequency range. In this work, the silicone rubber resonance absorption sheet with periodic cavities is prepared via inserting cylindrical steel strips with different diameters into the non-vulcanized colloid. Effects of size and arrangement of cavities on the sound absorption properties, as well as the corresponding mechanical properties, are investigated and discussed. Results indicate that periodic pattern designs could further improve the low-frequency sound absorption performance of silicone rubber foams, and increasing the cavity diameter could significantly improve the sound absorption efficiency of the prepared samples in the middle- and low-frequency range from 125 to 2000 Hz. Particularly, increasing the number of the layered cavities could also improve the sound absorption efficiency. The consumption of sound energy in the prepared silicone rubber resonance sheet is discussed, which could be attributed to the synergistic effect in different spatial scales.

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Improved Mechanical and Sound Absorption Properties of Open Cell Silicone Rubber Foam with NaCl as the Pore-Forming Agent

Cited by 15 publications

References 19 publications

Chemistry, Processing, Properties, and Applications of Rubber Foams

Chemistry, Processing, Properties, and Applications of Rubber Foams

Preparation of porous β-SiAlON ceramics using corn starch as pore-forming agent

Improved low-frequency sound absorption of porous silicone rubber resonance sheet with periodic cavities

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