JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 39
·
IF 1.768
Shu-Ting Liu,Ping-Ping Zhang,Kang-Kang Yan,Yuan-Hu Zhang,Ying Ye,Xue-Gang Chen
In this study, a novel -intercalated layered double hydroxide (Sb-LDH) was prepared by simultaneous recovering of LDH structures and intercalation of into LDH layers. The prepared Sb-LDH composites remain the hydrotalcite structure with layered geometry and show higher thermal property than that of LDH. When applied to poly(vinyl chloride) (PVC) composites, Sb-LDH showed limited thermal stability for PVC at the early stage of thermal and thermooxidative degradation processes. However, Sb-LDH could retard the thermal cracking of the carbonaceous conjugated polyene of PVC which may hinder further degradation, and the moderate amount of Sb-LDH (1, 2, and 5 wt %) in PVC resin can retard the process of decarbonation and enhance char formation. Sb-LDH also promoted the transparency of PVC but darkened the color. With the advantages of transparency promotion, high temperature resistance, and long-term stability, the prepared Sb-LDH is a potential thermal stabilizer for PVC resins. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42524.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yulong Yang,Jiao Feng,Shicui Zhu,Jinshu Zhou,Kejia Zhang,Xiaoyan Ma,Danial Gallagher,Andrea M. Dietrich
Nitrogenous disinfection by-products (N-DBPs) are more genotoxic and cytotoxic than the currently regulated carbonaceous DBPs (i.e., C-DBPs), and it has become a frontier issue of drinking water safety research. In this paper, the effect of granular activated carbon (GAC) on adsorption and its influencing factors was investigated for a typical N-DBP phenylacetonitrile, which is produced during chlorination of phenylalanine precursor during water treatment. The results showed that GAC had a high adsorption capacity (q max = 22.92 mg/g) for phenylacetonitrile, and the adsorption isotherm was fitted to the Langmuir isotherm model. Pseudo-second-order equation can well describe the behavior of phenylacetonitrile adsorption on activated carbon (R 2 > 0.990), and the adsorption rate constant k 2 = 0.7780–14.12 g/(mg h). Analysis of the influencing factors showed that higher phenylacetonitrile concentration improved the adsorption equilibrium capacity and the adsorption rate. Water temperature and pH had little effect on the capacity or rate of adsorption.
研究领域:
环境科学
·
水处理工程
·
毒理学
·
环境健康
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Yue Li,Zhencai Qu,Kun Wu,Peng Lv,Huifa Meng,Haoting Zheng,Jun Shi,Mangeng Lu,Xiaomei Huang
In this work, a bio-derived char-forming strategy for surface fireproofing was developed. Specifically, a vinyl-modified tannic acid, (VTA) was synthesized by a ring-opening reaction between tannic acid and glycidyl methacrylate. Integration of epoxy acrylate resin, VTA and tri-(glycidyl methacrylate) phosphate (TGMA), a novel UV-curing coating was prepared, which rendered the PET sheets with superior fireproofing effect. PET samples that were surface coated with the designed UV-curing agent displayed a UL-94 V-0 rating. The peak heat release rate (peak HRR) for combustion of PET was reduced by 10.66% upon application of the flame-retardant coating in cone calorimetry tests. However, the total smoke release (TSR) increased by 48.28% due to pyrolysis of tannic acid produces 1,2,3-benzenetriol and carbon dioxide, plus the triol underwent partial combustion with the formation of large amount of particulates. The thermal behavior of cured coating revealed that the presence of high carbon content aromatic tannic acid promoting cationic crosslink and char formation ability. When 40% VTA was added into a coating, the pyrolysis char yield increased by 36.88%. Furthermore, the capability of inhibit heat transfer with the presence of VTA significantly decreased the maximum rate of weight loss for the coating by 85.97%. The increase in the VTA content promoted crosslinking density of the coating, which leads to good rigidity, outstanding abrasion resistance and remarkable water fastness.
研究领域:
高分子材料
·
阻燃化学
·
表面工程
·
绿色化学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Rong Yang,Binbin Ma,Hui Zhao,Jinchun Li
A macromolecular charring agent named as PEPADC was synthesized by using cyanuric chloride, 2,6,7-trioxa-l-phosphabicyclo[2.2.2]octane-4-methanol (PEPA), and diethylenetriamine and used to prepare intumescent flame retardant polypropylene (IFR-PP) containing ammonium polyphosphate (APP). The effect of flame retardant compound on thermal degradation, flame retardancy, and fire behavior properties of a IFR-PP system has been investigated. The results suggested that the max thermal degradation temperature (Tmax) as well as char residue at 700 °C increased with IFR loading. The highest LOI value of IFR-PP is 35.5, while the IFR loading is 30 wt % and the weight ratio of APP to PEPADC is 4:1. Meanwhile, the IFR-PPs can pass UL-94 V-0 when the weight ratio of APP to PEPADC is between 1:2 and 5:1. Cone calorimetry results indicated that IFR-PPs exhibited much lower heat release rate (HRR), total heat release (THR), specific extinction area (SEA), and total smoke production (TSP) than the neat PP.
研究领域:
高分子材料
·
阻燃化学
·
材料科学
·
热分析
·
火灾安全工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Jun Zhao,Haibin Zuo,Guangwei Wang,Jingsong Wang,Qingguo Xue
To effectively utilize low-rank coal and biomass in the coking process, through the dissolution method, hypercoal (HPC) was produced, and its performance as an additional component in the coking process was also investigated. The cold strength of coke was tested using an I-type tumble tester and a universal testing machine; the carbon structure of the HPCs was examined via thermogravimetry (TG), X-ray diffraction (XRD), and Fourier transform infrared spectrometry (FT-IR) analyses. The results revealed that the thermoplastic properties of HPCs and the coke cold strength increased compared to raw coal. There is a positive linear relationship between the cold strength of coke and the order degree of the HPCs. As the biomass amount increased, the order degree of the HPCs greatly decreased, resulting in a decrease in the coke cold strength. When the amount of biomass was 20%, the caking index (G), drum strength, and compressive strength achieved maximum values of 95.21%, 83%, and 7.13 MPa, respectively. In addition, a caking mechanism of the HPCs is proposed.
研究领域:
燃料化学
·
煤化工
·
材料科学
·
能源工程
·
工业化学
·
资源利用
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·24113-24128
·
IF 0
Ma Xiaoxiao,Li Yutong,Du Yile,Chen Shuangli,Bai Yunfan,Li Lin,Qi Chuhua,Wu Pingping,Zhang Sijing
The presence of organic dyes in aquatic systems poses a significant threat to ecosystems and human well-being. Due to recycling challenges, traditional commercial activated carbon is not cost-effective. To address this, an imidazolate acid zeolite framework-8 (ZIF-8)-modified magnetic adsorbent (ZMPLB-800) was synthesized through the in-situ formation of ZIF-8 and subsequent carbonization at 800 °C, using magnetic pineapple leaf biochar (MPLB) as a carrier. The porous structure of ZMPLB-800 facilitates the rapid passage of dye molecules, enhancing adsorption performance. ZMPLB-800 exhibited remarkable adsorption capacity for methylene blue (MB) across a pH range of 3–13, with a maximum adsorption capacity of 455.98 mg g −1 . Adsorption kinetics and thermodynamics followed the pseudo-second-order kinetic model and Langmuir isotherm model. Mechanisms of MB adsorption included pore filling, hydrogen bonding, electrostatic interactions, π-π interactions, and complexation through surface functional groups. Additionally, ZMPLB-800 demonstrated excellent regeneration performance, recording a removal efficiency exceeding 87% even after five adsorption/desorption cycles. This study provides a novel strategy for treating dye wastewater with MOF composites, laying the foundation for waste biomass utilization. Graphical
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shangshu Peng,Shengshang Lu,Xinhai Wang,Linxi Dai,Bo Chen,Yang Wu,Quan Xie,Yunjun Ruan
The high specific surface area, excellent electrical conductivity, and chemical stability of porous carbon have increasingly garnered attention in supercapacitors. Herein, rapeseed stalks were utilized as precursors to synthesize nitrogen (N) and oxygen (O) co-doped porous activated carbon (RSAC) through processes of high-temperature carbonization and KOH activation. The optimally synthesized RSAC-10 exhibits an ultra-high specific surface area of 3085 m 2 g −1 , a specific capacitance of 354.7 F g −1 at 1 A g −1 , and remarkable cyclic stability (105% of its specific capacitance after 10,000 cycles). Moreover, a symmetric supercapacitor (SSC) fabricated with RSAC-10 electrodes and a 6 M KOH electrolyte demonstrates a high specific capacitance of 85.21 F g −1 at a current density of 0.25 A g −1 , maintaining 89.8% of its initial capacitance after 10,000 cycles. Additionally, an SSC comprising RSAC-10 electrodes and [BMIM]BF 4 electrolyte delivers an energy density of 52.6 Wh kg −1 at a power density of 375.1 W kg −1 . This work presents an effective method for valorizing crop waste and successfully prepares electrode materials with high specific surface areas alongside substantial energy and power densities.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 47
·37780-37788
·
IF 3.84
Yuanyuan Xu,Jinming Sun,Hou Chen,Liangjiu Bai
Bis(acetylacetonato) iron(II) (Fe(acac)2) was first selected to mediate the reversible-deactivation radical polymerization (RDRP) of acrylonitrile (AN) with predictable molecular weights, relatively narrow molecular weight distributions and high end-fidelity. The reversible termination (RT) mechanism accounted well for the reaction phenomena. The spinning performance of polyacrylonitrile (PAN) was investigated and the average diameter of the spinning fibers was approximately 300 nm. Activated carbon fibers (ACFs) were prepared via sodium hydroxide (NaOH) direct activation. The maximum specific surface area of the ACF was as high as 1165 m2 g−1. The pore volume of the ACF reached 0.14 cm3 g−1. Most is the contribution of the small mesopores (2–5 nm). The unique microstructures enabled the ACFs to have good compatibility with potassium hydroxide (KOH) as electrolyte. The highest capacitance reached 167 F g−1 at room temperature. The electrode showed well stabilized capacitance after 500 cycles and high energy/power density values due to the formation of small mesopores.
研究领域:
材料科学
·
电化学
·
高分子化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kun Zhang,Yu Ge,Shaolang He,Fei Ge,Qianru Huang,Zhong Huang,Xinyue Wang,Yangping Wen,Binqiang Wang
Kudzu vine biochar (KVB) modified flexible carbon electrode (FCE) for the portable wireless intelligent sensing of clenbuterol (CLB) in bovine serum using cheap miniaturized analyzer composed of both smartphone and electrochemical mini-workstation was developed. Kudzu vine derived from abundant biomass residues of important traditional Chinese medicinal vine plants was selected for the preparation of KVB produced by pyrolyzing fine powders of kudzu vine at high temperature under oxygen-limited conditions. The morphology of KVB was characterized by scanning electron microscopy. FCE as flexible substrate electrode was prepared by the laser direct writing technique. The KVB modified FCE displayed excellent electrocatalytic response towards CLB in wide liner ranges from 0.95 to 14.31 μM with a low limit of detection of 0.75 μM. Practical application with satisfactory results will provide new opportunity for the comprehensive utilization of biomass residues of traditional Chinese medicinal plants as low-cost biochar for advanced electrode materials in portable wireless intelligent sensing platform based on cheap miniaturized analyzer composed of both smartphone and electrochemical miniworkstation for harmful residues in the quality safety of agro-products and food.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2023
·
IF 3.6
Yuchuan Ren,Zhanwei Xu,Ying Wang,Fanyu Lu,Yaze Zhao,Kai Yao,Hao Fu,Hao Luo
Applications of sodium ion batteries (SIBs) are inseparable from scalable anode materials with high electrical conductivity and excellent stability. In this work, coal tar pitch activated carbon was functionalized (FAC) and employed as a substrate, followed by a hydrothermal process to fabricate MoS 2 /FAC nanocomposite with tight bonding. The MoS 2 exhibits a homogeneous integrated structure with an enlarged interlayer spacing of 0.65 nm in the obtained MoS 2 /FAC. When employed as anode material for SIBs, the MoS 2 /FAC electrode delivers a promising reversible capacity of 174.0 mAh g −1 at 2 A g −1 , with a decay rate of 0.148%·cycle −1 after 500 cycles. The ultrahigh rate of sodium storage is mainly attributed to uniform MoS 2 nanosheets anchored on the FAC through C-O-Mo bonding, and the wide layer spacing of the ultrathin MoS 2 nanosheets.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 6
·1039-1044
·
IF 1.063
Gu Xianmo,Ma Pengwei,Liu Pei,Wang Ruiyi,Li Xincheng,Zheng Zhanfeng
A new type of activated carbon immobilized copper(Cu/AC) photocatalyst was prepared by a facile impregnation-adsorption method, where Cu 2+ is chemically adsorbed by abundant oxygenated functional groups on large-surface-area activated carbon surface. Cu/AC exhibited good activity and selectivity to imine for the hydroamination of alkynes at 60 °C under visible light irradiation. The reaction is initialized by the activation of alkynes molecules at Cu active sites with the aid of light as evidenced by the solid-state NMR and laser photolysis measurements and the control experiments. This strategy for catalyst design is potentially extended to the immobilization of other metal homogeneous catalysts for various heterogeneous catalytic systems.
研究领域:
催化化学
·
材料科学
·
有机合成
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 4
·1011-1019
·
IF 2.372
Huang Pingquan,Zeng Xiaoyan,Du Fan,Zhang Lei,Peng Xinwen
Abstract Novel thiol functionalized xylose hydrochar microspheres supported palladium nanoparticles (C–SH–Pd) were synthesized by gentle heating of palladium (II) acetate and thiol functionalized xylose hydrochar (C–SH) in ethanol. The as-prepared C–SH–Pd exhibited high catalytic activity towards Suzuki reactions with a yield of high up to 100%. Moreover, it could be reused for at least five times without heavily loss of the catalytic activity. The amount of palladium entrapped on C-SH microspheres was measured by AAS and found to be 1.42 mmol/g. Leaching studies showed that the filtrate contained less than 0.2 ppm Pd. Due to the superior catalytic performance and stability of the C–SH–Pd catalyst, it can be exploited in other cross coupling reactions in the long run. Graphic Abstract
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）