COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
San-E Zhu,Fen-Dou Wang,Jun-Jie Liu,Li-Li Wang,Cheng Wang,Anthony Chun Yin Yuen,Timothy Bo Yuan Chen,Imrana I. Kabir,Guan Heng Yeoh,Hong-Dian Lu,Wei Yang
Acrylonitrile-butadiene-styrene (ABS) resin is a commonly used engineering thermoplastic . Nevertheless, the fire toxicity hazards (HCN, NO x , NH 3 and CO) generated from the combustion of ABS remains a major concern, especially in building fire scenarios. To address this issue, boron dipyrromethene (BODIPY) modified MXene (Ti 3 C 2 T x ) nanosheets were prepared and utilized as a flame retardant for ABS. The loading of 0.5 wt% BODIPY-MXene resulted in the uniform dispersion in ABS. Accordingly, the tensile strength , Young's modulus and elongation at break of ABS/BODIPY-MXene0.5 were improved by 27.8%, 18.6% and 17.9% respectively compared to neat ABS, suggesting the enhanced mechanical properties . The limiting oxygen index (LOI) value was increased from 19.5% for neat ABS to 21.5% and 23.5% for ABS/BODIPY-MXene0.5 and ABS/BODIPY-MXene2.0 benefitted from the rapid carbonization . The cone calorimeter coupled with FTIR analysis showed that the reductions in peak heat release rate (−24.5%), peak smoke production rate (−18.4%), peak concentration of HCN (−33.5%), NO (−22.0%), N 2 O (−46.6%), NH 3 (−76.0%) and CO (−28.8%) were achieved by incorporating 0.5 wt% BODIPY-MXene to ABS in comparison with pure ABS. The improved fire safety properties were primarily attributed to the excellent barrier, free radical capture, and catalytic carbonization effect of BODIPY-MXene nanosheets within ABS matrix.
研究领域:
材料科学
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高分子化学
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消防安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 22
·12467-12479
·
IF 4.4
Pan Weihao,Zhou Qiankun,Yang Wenjie,Nie Shibin,Xu Liangji,Wei Chunxiang,Lu Hongdian,Yang Wei,Yuen Anthony Chun Yin
Acrylonitrile–butadiene–styrene (ABS) composites with less smoke and toxicity hazards (e.g., HCN and NO x ) emission are highly demanded. As a common smoke suppressant, zinc hydroxystannate (ZHS) has been used in various polymers, while the high content, special cube shape and agglomeration restrict its development. To solve these problems, MXene (Ti 3 C 2 T x ) nanosheets were utilized to wrap ZHS nanoparticles (Ti 3 C 2 T x -PDA-ZHS) to improve the dispersion and compatibility of ZHS nanoparticles in ABS, in which polydopamine (PDA) was used as a binder to combine ZHS and MXene nanosheets. Accordingly, the prepared ABS/Ti 3 C 2 T x -PDA-ZHS nanocomposites showed the enhanced properties: (1) ABS/Ti 3 C 2 T x -PDA-ZHS exhibited a 69.7% increase in elongation at break compared to ABS/ZHS at a 2 mass% loading. (2) Owing to the synergistic effect of MXene and ZHS, Ti 3 C 2 T x -PDA-ZHS provided excellent inhibition on heat and toxic gas release during combustion (a reduction of approximately 17.5%, 34.5%, 19.1% and 20.0% of peak heat release rate, HCN, NO and NO 2 , respectively). (3) The smoke density decreased from 525.6 for neat ABS to 423.2 for ABS/Ti 3 C 2 T x -PDA-ZHS with a reduction of 19.5%, and the light transmittance of ABS/Ti 3 C 2 T x -PDA-ZHS (37.7%) was much higher than that of pure ABS (21.2%) at 240 s. Therefore, Ti 3 C 2 T x -PDA-ZHS showed a great enhancement in flammability, toxicity and smoke release reduction of ABS, potentially overcoming the weakness with improved diversity in future applications. Graphical abstract
研究领域:
材料科学
·
燃烧化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2014
·Vol. 15
·期 4
·6412-6422
·
IF 2.339
Jiushuai Xu,Ruibin Fan,Jiaolong Wang,Mengke Jia,Xuanrui Xiong,Fang Wang
Copper films were grown on (3-Mercaptopropyl)trimethoxysilane (MPTMS), (3-Aminopropyl)triethoxysilane (APTES) and 6-(3-(triethoxysilyl)propylamino)-1,3,5- triazine-2,4-dithiol monosodium (TES) self-assembled monolayers (SAMs) modified acrylonitrile-butadiene-styrene (ABS) substrate via electroless copper plating. The copper films were examined using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Their individual deposition rate and contact angle were also investigated to compare the properties of SAMs and electroless copper films. The results indicated that the formation of copper nuclei on the TES-SAMs modified ABS substrate was faster than those on the MPTMS-SAMs and APTES-SAMs modified ABS substrate. SEM images revealed that the copper film on TES-SAM modified ABS substrate was smooth and uniform, and the density of copper nuclei was much higher. Compared with that of TES-SAMs modified resin, the coverage of copper nuclei on MPTMS and APTES modified ABS substrate was very limited and the copper particle size was too big. The adhesion property test demonstrated that all the SAMs enhanced the interfacial interaction between copper plating and ABS substrate. XRD analysis showed that the copper film deposited on SAM-modified ABS substrate had a structure with Cu(111) preferred orientation, and the copper film deposited on TES-SAMs modified ABS substrate is better than that deposited on MPTMS-SAMs or APTES-SAMs modified ABS resins in electromigrtion resistance.Keywords:ABS resin;SAMs;electroless copper film;heterocyclic silane
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
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2021
·
IF 3.33
BY Hou,L Ren,YN Sun,MY Zhang,HX Zhang
This work proposed an efficient method to synthesize acrylonitrile-butadiene-styrene (ABS) copolymer and α-Methylstyrene (α-MSt)/N-phenylmaleimide (NPMI)/Acrylonitrile (AN) (MSAMI) random copolymer via emulsion polymerization, aiming to combine the excellent heat resistance of MSAMI and numerous advantages of ABS resin including mechanical properties, processing and recyclability. The effects of the MSAMI content and α-MSt/AN ratio on the thermal performance, mechanical properties and the morphology of heat-resistant ABS were investigated by FITR, dynamic mechanical analyses (DMA), Vicat Softening Temperature (VST), Thermogravimetric Analysis (TGA) and Scanning Electron Microscope (SEM). As a result, the heat-resistant of ABS resin was obviously enhanced by MSAMI, and its glass transition temperature (Tg) could be extended with the increase of NPMI content. The Tg could reach 173°C when NPMI content was 20% at the same trend as the VST. Synthetically, the contradiction between the heat resistance and mechanical properties of ABS resin reached a good balance when the NPMI content was 15% and α-MSt/AN ratio was 69/31. In SEM, the fracture morphology of the heat-resistant ABS resin was gradually tended to be smooth with the increase of the NPMI content. Therefore, the MSAMI random copolymer was successful prepared, which provided insight for the synthesis of heat-resistant modifiers and promoted the potential application of heat-resistant modifiers in automobiles and aircraft.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 30
·e54085
·
IF 3
Xiao-Peng Wang,Feng-Hang Yao,Jie Chen
In this study, a reactive hindered phenol antioxidant, 3,5-di- tert -butyl-4-hydroxyphenyl methyl isobutylene ester (DBHMIE), was synthesized and used to improve the antioxidant performance of ABS (acrylonitrile-butadiene-styrene terpolymer) resin. The chemical structure of DBHMIE was determined with Fourier transform infrared spectroscopy, 1 H nuclear magnetic resonance (NMR), and 13 C NMR spectroscopy. Moreover, the effects of the DBHMIE content on the antioxidant capabilities, thermal stabilities, tensile strengths, impact strengths, and morphologies of the ABS/antioxidant systems were investigated. The results indicated that the oxidation induction temperatures of the systems increased from 229.7 to 245.4°C as the DBHMIE content was increased from 0 to 0.5 wt%. The 5% mass loss temperature of the system was increased from 338.4 to 347.8°C by the addition of 0.3 wt% DBHMIE. The impact strengths of the systems increased with increasing DBHMIE content up to 0.1 wt% and then decreased. The addition of DBHMIE did not significantly affect the tensile strength of the ABS resin. SEM images showed that the DBHMIE was uniformly distributed in the ABS resin at low DBHMIE contents and agglomerated at high DBHMIE contents.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Yesu Zhang,Yanhong Quan,Jun Ren
A series of sulfonated activated carbon catalysts (AC-SO 3 H- x ) were prepared by using sulfuric acid as the sulfating agent and used for the ethanolysis of furfuryl alcohol (FA) to ethyl levulinate (EL). The catalytic performance of AC-SO 3 H- x catalysts increased firstly and then decreased with introducing sulfuric acid and AC-SO 3 H-5 catalyst exhibited the highest activity with 95.3 % yield to EL and complete FA conversion, superior to that reported in the literature. Moreover, EL yield displayed the volcanic trend against with SO 3 H group concentration and the excellent catalytic performance of AC-SO 3 H-5 was attributed to appropriate surface acidity derived from the introduction of sulfonic acid groups (SO 3 H groups). Furthermore, it was firstly identified by the combination of FT-IR characterizations with Boehm's titration method that C-S bonds were formed through C atoms in phenolic hydroxyl groups of carbon surface bonding with SO 3 H groups. Additionally, the various sulfonation conditions and reaction conditions were optimized and it was found that low n FA /n EtOH (0.005) was very critical. This work provided a feasible strategy for the design of efficient carbon-based solid acid catalysts and innovatively elucidated the surface functional groups of carbon bonded to SO 3 H groups, which would drive the development of renewable FA to EL.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
Jinbao Huang,Liming Tai,Shi Yan,Sijia Li,Hao Cheng,Hong Wang,Yu Lv,Wenjing Duan,Xinsheng Li
Acrylonitrile-butadiene-styrene copolymer (ABS) is a kind of engineering plastic with excellent comprehensive properties, and is widely used in various industries. ABS can be converted into aromatics, aliphatics, and nitriles compound during thermal degradation, but the evolutionary mechanism of these degradation products remains unclear. In this article, ABS dimer, polyacrylonitrile (PAN), polybutadiene (PB), and polystyrene (PS) tetramer are selected as model compounds to investigate the evolution mechanism of the main pyrolysis products by using density functional theory method. The results show that the concerted reaction of HCN elimination by branched chain cleavage has a high reaction energy barrier and may be difficult to occur. The primary reaction pathway is the radical reaction involving the direct cleavage of the C butadiene -C acrylonitrile bond in the main chain, with an energy barrier of 287.1 or 286.3 kJ/mol. The two radicals generated by the initial pyrolysis can undergo further reactions, including β -scission, intramolecular hydrogen transfer, and dehydrogenation reactions. These reactions ultimately lead to the formation of the main products, such as styrene, acrylonitrile, butadiene, α -methylstyrene, and isopropylbenzene. The thermal degradation processes of ABS are investigated at 400, 500, and 600 ℃ by Py-GC/MS analysis. The experimental results of pyrolysis can effectively verify the rationality of the theoretical inference. Based on toxicity assessments, the acute and chronic toxicity of MC4 to aquatic organisms are severe. In addition, the toxicity of the degradation products is lower than that of MC4. These findings indicate that the toxicity of the products to aquatic organisms is significantly reduced.
研究领域:
高分子化学
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材料科学
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环境毒理学
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计算化学
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热解动力学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 40
·23532-23542
·
IF 3.119
He Guo,Xiaomeng Cheng,Hongping Li,Jun Li,Jinjin Wei,Chongyang Feng
A new nanoprobe, the luminescent diblock copolymer PNIPAM(MAh-4)-b-P4VP (PN4P), with pH- and thermo-responsive deprotonation-driven emission decay (DDED) and aggregation-induced emission (AIE) features was designed and synthesized. The nanoprobe PN4P can form micellar structures in water with reversible dual-responsive fluorescence (FL) behavior within a wide pH range of 2–11. The critical solution temperature was found at about 32, 30 and 27 °C as the pH switched from 2, 7 to 11. The critical pH value of the probe was about 4.0, and the micelles showed a core–shell inversion in response to pH and thermal stimuli, accompanied by a desirable emission tunability. P4VP as the micellar shell at pH = 2 was more easily dehydrated with the increase in temperature as compared to PNIPAM as the micellar shell at pH > 4. The strongest dehydration of the P4VP shell would make PN4P the most strongly aggregated and the most AIE-active, which supports the 2.10-fold most distinguished thermal-responsive emission enhancement at pH = 2. Moreover, a dramatic acidochromic redshift of the emission band from 450 (pH > 4) to 490 nm (pH = 2) was observed, and the maximum emission at pH = 2 was enhanced by about 2.07-fold as compared with that at pH = 7. Therefore, the probe displays the desired dual responses and good reversibility. AIE and DDED are the two major mechanisms responsible for the dual-responsive emission change, with AIE playing a more important role than DDED. This work offers a promising approach to interpreting temperature (range from 28 to 40 °C) and pH changes (range from 2 to 7) in water.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）