Induced assembly of polystyrene composites for simultaneously improving flame retardant and electromagnetic shielding properties

Gao, Caiqin; Shi, Yongqian; Zhu, Shicheng; Fu, Libi; Feng, Yuezhan; Lv, Yuancai; Yang, Fuqiang; Liu, Minghua; Shui, Wei

doi:10.1002/pat.5427

Cited by 11 publications

(9 citation statements)

References 63 publications

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“…17 Caiqin Gao synthesized silicon wrapped ammonium polyphosphate (SiAPP) by microencapsulating APP, the peak heat release rate (PHRR) and total heat release (THR) of the polystyrene (PS) containing 10 wt% SiAPP and 10 wt% reduced graphene oxide (rGO) decrease by 47.2% and 30.3%, respectively. 18 Chitosan (CS), a low-cost, non-toxic and biodegradable material, is selected as a char-forming agent. 19 Xiaoyu Gu et al reported that APP and CS can promote the formation of dense, uniform and continuous char residue in the PLA matrix.…”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that microencapsulation technology can effectively improve the flame retardant (FR) efficiency of APP 17 . Caiqin Gao synthesized silicon wrapped ammonium polyphosphate (SiAPP) by microencapsulating APP, the peak heat release rate (PHRR) and total heat release (THR) of the polystyrene (PS) containing 10 wt% SiAPP and 10 wt% reduced graphene oxide (rGO) decrease by 47.2% and 30.3%, respectively 18 . Chitosan (CS), a low‐cost, non‐toxic and biodegradable material, is selected as a char‐forming agent 19 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a biobased core‐shell flame retardant and its application in polylactic acid

Wang

Gong

Meng

et al. 2022

J of Applied Polymer Sci

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Biobased flame retardant (FR) has attracted great interest owing to its green and degradable properties similar to polylactic acid (PLA). In this work, with ammonium polyphosphate (APP) as the core, chitosan (CS) and halloysite (HNT) as the shell, a biobased FR (APP@CS@HNT) with a core‐shell structure was prepared through the self‐assembly method. The flame retardancy of PLA composites has been improved with the addition of the FR (APP@CS@HNT). With the loading of 17 wt% APP@CS@HNT, the PLA composite shows a high limiting oxygen index value (29.4%) and achieves vertical burning (UL‐94) test V0 rating. Compared with pure PLA, the cone calorimetry test indicates that the peak heat release rate (PHRR) and total heat release decrease from 299.88 to 152.29 kW/m2 and from 102.0 to 71.2 MJ/m2, respectively. The addition of APP@CS@HNT can also improve the smoke suppression performance of PLA composites. Such enhanced flame retardancy is mainly attributed to APP@CS@HNT prompting the PLA matrix to produce more continuous and denser carbon layers at a lower temperature to form physical barriers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of a biobased core‐shell flame retardant and its application in polylactic acid

Wang

Gong

Meng

et al. 2022

J of Applied Polymer Sci

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“…The effect of β-CD@SnPP on the burning behaviors of EP composites was evaluated through cone calorimeter, revealing some important parameters to comprehend the flame retardant and smoke suppression capabilities during burning progress [38]. Time to ignition (TTI) is a main indicator for determining flammability.…”

Section: The Combustion Performance Of Ep/β-cd@snpp Compositesmentioning

confidence: 99%

Influence of Beta-Cyclodextrin Functionalized Tin Phenylphosphonate on the Thermal Stability and Flame Retardancy of Epoxy Composites

Chen¹,

Huang²,

Han³

et al. 2022

Journal of Renewable Materials

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To enhance the thermal stability and flame retardancy of epoxy resin (EP), beta-cyclodextrin (β-CD) is successfully introduced into the layered tin phenylphosphonate (SnPP), which is incorporated into EP matrix for preparing EP/β-CD@SnPP composites. The results indicate that the addition of β-CD@SnPP obviously improve the thermal stability and residual yield of EP composites at higher temperature. When the amount of β-CD@SnPP is only 4 wt%, EP/4β-CD@SnPP composites pass V-1 rating, and LOI value is up to 30.8%. Meanwhile, β-CD@SnPP effectively suppress the heat release and reduce the smoke production of EP/β-CD@SnPP composites in combustion, and the peak heat release rate (PHRR), total heat release (THR), smoke production rate (SPR) of EP/6β-CD@SnPP composites reduce by 28.4%, 33.0% and 44.8% by comparison with those of pure EP. The good flame retardancy and smoke suppression are ascribed to the synergistic effect of excellent carbon-forming capability and fire retardancy of β-CD@SnPP.

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“…In recent years, there have been more and more studies on bifunctional and multifunctional additives with flame retardancy and other functions. − Gao et al prepared PS/silicon-wrapped ammonium polyphosphate/multiwall carbon nanotube (PS/SiAPP/MWCNT) composites with a segregated structure via the methods of ball milling and hot pressing. The PS/SiAPP/MWCNT hybrid material was a satisfactory electromagnetic interference shielding material with excellent flame retardancy for electronic equipment .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of High-Molecular-Weight Bifunctional Additives with both Flame Retardant Properties and Antistatic Properties via ATRP

et al. 2022

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Polystyrene (PS) is widely used in our daily life, but it is flammable and produces a large number of toxic gases and hightemperature flue gases in the combustion process, which limit its application. Improving the flame retardancy of PS has become an urgent problem to be solved. In addition, in view of the disadvantage that small-molecule flame retardants can easily migrate from polymers during use, which leads to the gradual reduction of the flame retardant effect or even loss of flame retardant performance, and the outstanding advantages of ATRP technology in polymer structure design and function customization, we used ATRP technology to synthesize the high-molecular-weight bifunctional additive PFAA-DOPO-b-PDEAEMA, which has flame retardant properties and antistatic properties. The chemical structure and molecular weight of PFAA-DOPO-b-PDEAEMA were characterized by FTIR, 1 H NMR, GPC, and XPS. When the addition of PFAA-DOPO-b-PDEAEMA was 15 wt %, the limiting oxygen index (LOI) of polystyrene composites was 28.4%, which was 53.51% higher than that of pure polystyrene, the peak of the heat release rate (pHRR) was 37.61% lower than that of pure polystyrene, UL-94 reached V-0 grade, and the flame retardant index (FRI) was 2.98. In addition, when the PFAA-DOPO-b-PDEEMA content is 15 wt %, the surface resistivity and volume resistivity of polystyrene composites are 2 orders of magnitude lower than those of polystyrene. This research work provides a reference for the design of bifunctional and even multifunctional polymers.

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Induced assembly of polystyrene composites for simultaneously improving flame retardant and electromagnetic shielding properties

Cited by 11 publications

References 63 publications

Preparation of a biobased core‐shell flame retardant and its application in polylactic acid

Preparation of a biobased core‐shell flame retardant and its application in polylactic acid

Influence of Beta-Cyclodextrin Functionalized Tin Phenylphosphonate on the Thermal Stability and Flame Retardancy of Epoxy Composites

Synthesis of High-Molecular-Weight Bifunctional Additives with both Flame Retardant Properties and Antistatic Properties via ATRP

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