Synthesis of Core/Shell Structured Zinc Borate/Silica and Its Surface Charring for Enhanced Flame Retardant Properties

Wang, Xuesong; Li, Lü; Tong, Yuping; Dai, Yong Juan; Chen, Wendan

doi:10.1016/j.polymdegradstab.2020.109432

Cited by 15 publications

(7 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silicone rubber is highly regarded for its high and low temperature resistance, aging resistance, hydrophobicity and excellent dielectric properties, and is widely used in aerospace engineering, medicine, electronics, power transmission and other fields. [1][2][3][4] However, silicone rubber has a disadvantage in fire safety due to its flammability, especially its tendency to smoldering. Meanwhile, the low thermal conductivity of silicone rubber products also limits their applications.…”

Section: Introductionmentioning

confidence: 99%

Improvement the flame retardancy, thermal conductivity and mechanical properties of silicone rubber via silane coupling agent modified CNTs‐β‐FeOOH

Zhang

Fan

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Silicone rubber with its odorless and non-toxic, high and low temperature resistance and other advantages is widely used in many fields, but its shortcomings of flammability and low thermal conductivity limit its application and development. Therefore, the research on flame retardant and thermal conductive silicone rubber is practically valueable. In this study, iron oxyhydroxide (β-FeOOH) was synthesized on carbon nanotubes (CNTs) by in situ growth and added to silicone rubber after surface modification with γ-aminopropyltriethoxysilane (KH550).The results showed that the limiting oxygen index (LOI) of methyl vinyl silicone rubber (VMQ) with the addition of one part of KH550@CNTs-β-FeOOH increased to 29.8%, its peak heat release rate (pHRR) and total heat release (THR) decreased by 40.1% and 30.2%, respectively, and its thermal conductivity increased to 0.3680 W/mÁk. The flame-retardant performance and thermal conductivity of the VMQ composite were significantly improved. The improvement of its flame retardancy was mainly due to the catalytic carbonization of CNTs and β-FeOOH, which promoted the formation of dense carbon layers. The carbon layer insulates the exchange of oxygen and combustible gases. In addition, the thermal conductive network constructed by KH550@CNTs-β-FeOOH in the composite effectively improved the thermal conductivity of VMQ.

show abstract

Section: Introductionmentioning

confidence: 99%

Improvement the flame retardancy, thermal conductivity and mechanical properties of silicone rubber via silane coupling agent modified CNTs‐β‐FeOOH

Zhang

Fan

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…[8][9][10] The aforementioned problems have been addressed through the addition of flame retardants. [11][12][13][14][15] Among these, phosphorous flame retardants, such as phosphazene, 16,17 phosphonate, 18,19 phosphine oxide, 20,21 and phosphonate amide 22,23 are efficient and nontoxic, and have been widely employed in many polymers. Among these, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its derivants are highly promising flame-retardant additives owing to their prominent flame retardancy, chemical versatility (flexible structure and adaptability to different systems), and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

A novel multifunctional phosphorous and nitrogenous reactive flame retardant toward epoxy resins by one‐pot method

Zhang,

Peng,

Xiao

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Epoxy resin (EP) has attracted considerable attention in packaging, electronic devices, aerospace, and coatings fields owing to its remarkable chemical and physical performance. However, the inherent flammable performance and unfavorable brittle nature seriously restricted its application in sophisticated industry. Herein, an efficient reactive 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO)‐based flame retardant (DB‐DAD) was prepared by a facile “one‐pot” method. Due to their synergistic gas‐phase and solid‐phase flame‐retardant effects, DB‐DAD modified EP composites (EP/DB‐DAD composite) easily achieved UL‐94 V‐0 ratings, and an EP/DB‐DAD composite with a 0.32 wt% phosphorus content had an excellent (30.2%) limiting oxygen index. In addition, the amounts of heat and smoke decreased by 28.1% and 24.8%, respectively. Due to the introduction of long and flexible aliphatic chains, the EP/DB‐DAD composites exhibited satisfactory mechanical properties, the flexural and tensile toughness of EP/6% DB‐DAD were 82.5% and 62.2% higher than those of neat EP, respectively. Furthermore, EP/DB‐DAD composite showed good transparency (>85%) and favorable UV shielding performance. The EP/DB‐DAD composite with good comprehensive performance is extremely promising to accelerate EP application in high‐tech industries.

show abstract

“…With the advantages of safety, non-toxicity, and low cost, zinc borate (ZB) has been widely used in the field of polymer flame retardant research and application [34][35][36][37][38]. The synthesis of ZB and SiO 2 composite could play an influential role in inhibiting fire spread and reducing the THR of silicone rubber [39]. Silicone rubber with aluminum hydroxide, magnesium hydroxide, ZB, and glass frits as additives could reach an LOI value of 34.8%, and the residue of the composite was roughly 58.6% at 700 • C, which was significantly higher than that of pure silicone rubber [40].…”

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

View full text Add to dashboard Cite

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.

show abstract

Synthesis of Core/Shell Structured Zinc Borate/Silica and Its Surface Charring for Enhanced Flame Retardant Properties

Cited by 15 publications

References 57 publications

Improvement the flame retardancy, thermal conductivity and mechanical properties of silicone rubber via silane coupling agent modified CNTs‐β‐FeOOH

Improvement the flame retardancy, thermal conductivity and mechanical properties of silicone rubber via silane coupling agent modified CNTs‐β‐FeOOH

A novel multifunctional phosphorous and nitrogenous reactive flame retardant toward epoxy resins by one‐pot method

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

Contact Info

Product

Resources

About