Vinyl‐functionalized polyborosiloxane for improving mechanical and flame‐retardancy performances of silicone rubber foam composites

Du, Wei; Yin, Chunrong; Huang, Hao; Gu, Xiaoyu

doi:10.1002/pi.6292

Cited by 20 publications

(2 citation statements)

References 30 publications

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“…They are usually chosen as an appropriate tool for blowing agents but are also promising candidates to serve as temperature-responsive microcapsules for self-sensing and deformation. Interestingly, silicone rubber foam (SRF) with a porous structure is formed after SR based on microspheres deforms, which contributes to high temperature resistance and thermal insulation property. , As for ablation resistance strengthening, zinc borate (ZB), a common fluxing agent and flame retardant, is conducive to form the SR ceramic body, effectively preventing further ablation. , This inspired us to study whether the foaming process and ablation strengthening can be coupled to achieve intelligent deformation and improve ablation resistance through synergistic effects.…”

Section: Introductionmentioning

confidence: 99%

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Chi

Cai

Yan

et al. 2023

ACS Appl. Mater. Interfaces

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Based on the strategy of killing two birds with one stone, we introduce thermally expandable microspheres into a silicone rubber matrix to fabricate temperature-responsive controllable deformation materials, which exhibit intelligent deformation properties as well as enhanced thermal protection performance, for dynamic thermal protection in the next-generation morphing aircrafts. The formation of hollow structures endows the material with intelligent thermal management ability and makes the thermal conductivity controllable, meeting the requirements of rapid deformation and excellent thermal insulation. The dimensions of the material adaptively expand with increasing temperature, and a constant 50N force can be provided to ensure reliable sealing. Moreover, benefiting from the synergistic effect of the hollow structure and zinc borate in the ceramization process of the silicone rubber, the 10 mm thick material can reduce the temperature from 2000 to 63 °C, and the mass ablation rate is only 4.8 mg/s. To broaden the application of our material, a sensor with a sandwich structure composed of different functional layers is designed. It is pleasantly surprising to observe that the sensor can provide real-time remote warning of fire and overheating sites with a response time as short as 1 s. This synergistic strategy opens a new possibility to fabricate intelligent thermal protection materials.

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Section: Introductionmentioning

confidence: 99%

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Chi

Cai

Yan

et al. 2023

ACS Appl. Mater. Interfaces

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“…Incorporating chitosan (CH)/ammonium polyphosphate (APP) and CH/montmorillonite (MMT) into SiFs, respectively, and found that both CH/APP and CH/MMT could increase the limiting oxygen index (LOI), reduce the peak HRR (PHRR), and smoke production of SiFs [13]. The mechanical properties and flame retardancy of the SiFs composites were significantly improved, and the generation of heat and smoke was inhibited when vinyl-terminated polyborosiloxane filler was mixed into the SiFs matrix [14]. Coating only 0.04 wt% graphene oxide (GO) on the surface of SiFs could significantly reduce its HRR and improve the flame retardancy of SiFs without affecting its density and mechanical flexibility [15].…”

Section: Introductionmentioning

confidence: 99%

Flame Retardancy and Smoke Suppression of Silicone Rubber Foam with Microencapsulated Sepiolite and Zinc Borate

Kang

Zhao

et al. 2023

Polymers

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The flame-retardant micro-encapsulated sepiolite (MSEP) was successfully prepared by sol-gel method. Fourier transform infrared, X-ray photoelectron spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy were utilized to prove that sepiolite was encapsulated. Then, the mechanical properties, flame retardance, smoke suppression, and pyrolysis characteristics of silicone rubber foam (SiFs) with MSEP and zinc borate (ZB) were analyzed. The results indicated that the tensile and compressive properties of SiFs could evidently improve with the incorporation of MSEP/ZB. SiFs with 3 wt% MSEP and 6 wt% ZB could achieve an limiting oxygen index value of 30.9 vol% and UL-94 V-0 rating, the time to ignition was 64.7% above that of pure SiFs, the peak heat release rate and total heat release were 42.7% and 25.0% lower than that of pure SiFs, respectively. Furthermore, the peak smoke production rate and total smoke production of SiFs with 3 wt% MSEP and 6 wt% ZB were merely 54.22% and 64.10% of pure SiFs. Especially, the thermal stability of SiFs was significantly enhanced, and the carbon residue of SiFs became denser and more complete after adding 3 wt% MSEP and 6 wt% ZB.

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Self‐Adhesive Polydimethylsiloxane Foam Materials Decorated with MXene/Cellulose Nanofiber Interconnected Network for Versatile Functionalities

Chen

Mao

et al. 2023

Adv Funct Materials

125

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Polydimethylsiloxanes (PDMS) foam as one of next‐generation polymer foam materials shows poor surface adhesion and limited functionality, which greatly restricts its potential applications. Fabrication of advanced PDMS foam materials with multiple functionalities remains a critical challenge. In this study, unprecedented self‐adhesive PDMS foam materials are reported with worm‐like rough structure and reactive groups for fabricating multifunctional PDMS foam nanocomposites decorated with MXene/cellulose nanofiber (MXene/CNF) interconnected network by a facile silicone foaming and dip‐coating strategy followed by silane surface modification. Interestingly, such self‐adhesive PDMS foam produces strong interfacial adhesion with the hybrid MXene/CNF nano‐coatings. Consequently, the optimized PDMS foam nanocomposites have excellent surface super‐hydrophobicity (water contact angle of ≈159o), tunable electrical conductivity (from 10−8 to 10 S m−1), stable compressive cyclic reliability in both wide‐temperature range (from −20 to 200 oC) and complex environments (acid, sodium, and alkali conditions), outstanding flame resistance (LOI value of >27% and low smoke production rate), good thermal insulating performance and reliable strain sensing in various stress modes and complex environmental conditions. It provides a new route for the rational design and development of advanced PDMS foam nanocomposites with versatile multifunctionalities for various promising applications such as intelligent healthcare monitoring and fire‐safe thermal insulation.

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Vinyl‐functionalized polyborosiloxane for improving mechanical and flame‐retardancy performances of silicone rubber foam composites

Cited by 20 publications

References 30 publications

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Flame Retardancy and Smoke Suppression of Silicone Rubber Foam with Microencapsulated Sepiolite and Zinc Borate

Self‐Adhesive Polydimethylsiloxane Foam Materials Decorated with MXene/Cellulose Nanofiber Interconnected Network for Versatile Functionalities

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