CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Yuhao Peng,Shanshan Li,Xiong Xu,Ruiqi Chen,Aote Cao,Jingting Lan,Xueliang Jiang,Anand Sreeram
Waste polypropylene (WPP), a common solid waste, has proven effective as an asphalt modifier for improving pavement performance. However, the direct application faces challenges such as high processing temperatures, poor dispersion, and inconsistent performance, which limit widespread application. To overcome these issues, this study applied a mechanochemical treatment of WPP using varying dosages of dicumyl peroxide (DCP) and epoxy soybean oil (ESO) to produce a novel waste plastic asphalt modifier. The process is designed to disrupt the long molecular chains and crystalline structure of WPP by DCP, while utilizing ESO to undergo dynamic chemical grafting reaction, thereby generating degraded WPP containing oxygen-active functional groups. Some testing results show that the modifier prepared with 0.3 % DCP reduced the dissolution temperature in organic solvents by about 20 °C and significantly enhanced high temperature performance and adhesion of asphalt. The softening point increased from 46.5 °C to 58.6 °C, a 26 % improvement, and fracture energy rose from 3.7 J·m −3 to 6.7 J·m −3 , yielding an 81 % increase in adhesion. In addition, the water damage resistance of the modified asphalt has also been significantly improved. Overall, the proposed WPP modifier preparation method effectively mitigates high temperature and performance inconsistency issues of conventional WPP modified asphalt, demonstrating significant comprehensive benefits.
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INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.4
Zhuoyu Lu,Nuoyan Ou,Lanying Lin,Kun Liu,Xiaolu Wu,Chuanshuang Hu,Jiangtao Xu,Yonghui Zhou,Mizi Fan
Novel development of high-loading bamboo flour/PHBV biocomposites. • Synergistic treatment of bamboo flour via delignification and impregnation of coupling agents. • Surface roughness and chemical interactions benefitted interfacial adhesion. • Enhanced interfacial bonding contributed to mechanical and thermal property improvement. This paper presents a novel development of bamboo flour/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) biocomposites with a particular focus on addressing the interfacial bonding through a synergistic treatment. The synergistic strategy involves the delignification of bamboo flour followed by impregnation of PHBV-based coupling agents synthesised in this work, including maleic anhydride (MA)-grafted PHBV (MA- g -PHBV), acrylic acid (AA) grafted-PHBV (AA- g -PHBV) and itaconic anhydride (IA) grafted-PHBV (IA- g -PHBV). Chemical structural analyses of bamboo flour suggested the removal of lignin and the possible interactions between surface hydroxyl groups and the introduced anhydride/carboxyl groups after the synergistic treatment. Microstructure analysis suggested the treated bamboo flour with increased surface roughness had better interfacial adhesion with PHBV matrix in the composites, which was further confirmed by their lower loss factor. The tensile strength and flexural strength of MA- g -PHBV modified delignified bamboo flour/PHBV composite were increased by 333.3% and 250.4% respectively, compared to those of the untreated counterpart. The improved interfacial bonding also resulted in the shift of composite failure mechanism from fibre pull-out to fibre breakage. The work provides a feasible and effective modification approach of lignocellulosic fibres for enhancing fibre-matrix interfacial bonding in biobased and biodegradable composites.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Xueying Shan,Qixin Huang,Jiao Gao,Hanchao Liu,Jingru Wang,Jinchun Li
The design of low-smoke and low-toxicity epoxy resin (EP) composite materials remained a significant challenge. In this study, a multifunctional MOF-based flame retardant (TP-P-Co-MOF) was synthesized using ZIF-67 as the framework via a three-step modification process. TP-P-Co-MOF incorporated Schiff base-conjugated structures, Co P synergistic flame-retardant sites, and a porous architecture, while exhibiting excellent compatibility with EP. At a 4 wt% loading, the EP/TP-P-Co-MOF composite attained a UL-94 V-0 classification and an LOI of 31.3%. Additionally, in comparison with EP, the EP/TP-P-Co-MOF composite exhibited marked reductions in the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR), and total smoke production (TSP), which decreased by 43.1%, 14.9%, 64.0%, and 52.6%, respectively, thereby demonstrating outstanding flame-retardant efficiency and toxic-smoke suppression performance. Investigation of the flame-retardant mechanism indicated that TP-P-Co-MOF not only significantly improved the quality of the graphitized carbon layer in EP, but also reduces the concentration of combustible gases, thereby exerting synergistic flame-retardant effects in both the condensed and gas phases. With respect to mechanical properties, the incorporation of TP-P-Co-MOF improved both the toughness and strength of the EP. The tensile strength and impact strength increased by 11.1% and 24.7%, respectively, in comparison with neat EP. This study provided a promising strategy for developing highly efficient MOF flame retardants while offering a novel approach to designing low-smoke, low-toxicity flame-retardant EP.
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Scientific Reports
·
2026
·Vol. 16
·期 1
·10888
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IF 4.9
Song Rui,Wu Yushuang,Chen Shuo,Wang Guanyu,Han Lei,Li Jie
While increasing dietary calcium (Ca) intake can reduce the oral bioavailability of heavy metal(loid)s, it remains unclear whether a series of Ca compounds can simultaneously reduce the oral bioavailability of As and Pb from soil. The influence of eight Ca compounds on As and Pb bioaccessibility in soils was determined using an in vitro gastrointestinal model, following which an in vivo bioassay was used to determine the most effective Ca compounds on As and Pb bioavailability. The results showed that, while CaHPO 4 was the most effective in reducing Pb bioaccessibility in gastric (from 19.0 to 92.3% to 14.3‒66.4%) and intestinal (from 0.18 to 17.5% to 0.00‒3.53%) phases, it conversely exhibited the strongest capacity to enhance As bioaccessibility. However, the addition of Ca acetate reduced the Pb bioaccessibility in the gastric phase and As bioaccessibility in the intestinal phase. More importantly, the Ca acetate (~ 200 mg Ca kg -1 ) was the most effective in reducing relative bioavailability of As and Pb based on mouse bioassay. Our finding verify the efficacy of Ca acetate in mitigating the oral bioavailability of As and Pb. This study lays a theoretical foundation for the targeted use of optimal Ca compounds to mitigate human exposure risks to environmental As and Pb.
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Analytical Methods
·
2026
·
IF 3
Jia Li,Binlian Jiang,Runan Chen,Yanjiao Qia,Dongdong Cheng,Jun Lin,Zegen Wang,Lina Lu,Shuhe Kang,Xiao-Jun Yang
In this study, the sol-gel method and layer-by-layer self-assembly technology were used to graft dummy template molecular imprinting polymers (DMIPs) onto the surface of microspheres (CG161M), thereby preparing the DMIPs@CG161M composite material. This composite material was then utilized as an adsorbent for detecting organophosphorus pesticides in food. A structurally analogous yet less toxic compound, diphenyl chlorophosphate, was employed as the dummy template to circumvent the detection interference arising from template leakage-a common drawback of traditional molecularly imprinted polymers-while also minimizing the safety risks associated with handling highly toxic pesticide standards during experimentation. The DMIPs@CG161M composite was immobilized as an adsorption medium on a hollow fiber stirring bar (HF-SBSE) to develop a solid-phase microextraction adsorbent. Combined with gas chromatography-mass spectrometry (GC-MS), a highly sensitive analytical method was established for detecting organophosphorus pesticides in food samples. Under optimal conditions, the method demonstrated good linearity for five organophosphorus pesticides- diazinon, parathion-methyl, fenitrothion, chlorpyrifos, and parathion-across a concentration range of 0.01-10 mg/L, with determination coefficients (R²) exceeding 0.9998. The limits of detection (LOD) and quantification (LOQ) ranged from 0.01 to 0.03 mg/L and 0.03 to 0.11 mg/L, respectively. In the spiked food sample analysis, the recovery rates fell within the range of 61.61% to 91.41%, with relative standard deviations (RSD) recorded between 4.01% and 6.91%. These findings indicate that the synthesized DMIPs@CG161M composite exhibits excellent selective adsorption performance toward organophosphorus pesticides in food samples, highlighting its strong potential as an efficient adsorbent for practical applications.
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EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Genzheng Sha,Fenglong Li,Haiquan Sun,Jiheng Ding,Xiaolin Wang,Minghui Cui,Jin Zhu,Baoqiang Li,Peng Xiao,Jing Chen
Thermally conductive composites are witnessing expanding applications in electronics, energy and aerospace sectors. However, the development of eco-friendly, durable and high-performance thermally conductive materials remains a key challenge. To address this challenge, we rationally designed and fabricated a cardanol-derived non-isocyanate polyurethane (NIPU). Boron nitride nanosheets (BNNSs) and diphenyl chlorophosphate (DCP) were incorporated into the NIPU matrix to improve its thermal conductivity and flame-retardant performance. Moreover, dynamic disulfide bonds were rationally incorporated into the system, endowing the NIPU composites with efficient and reliable self-healing capabilities. Consequently, benefiting from the continuous thermally conductive pathways established by BNNSs, the 20% NIPU-2 N sample exhibited a striking 270% enhancement in through-plane thermal conductivity at a BNNSs loading of 20 wt%, reaching a final thermal conductivity of 1 W·m −1 ·K −1 . Additionally, the 20% NIPU-2 N achieved efficient self-healing at 100 °C within 3 h, with a tensile-strength recovery of 95.5%, and attained a V-0 flame retardancy rating. This fabrication strategy, leveraging the nano-reinforcing effect of BNNSs, offers a scalable approach that integrates green synthesis, efficient thermal management, and prolonged service life, demonstrating outstanding application potential in flexible printed circuits and wearable sensors.
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Journal of Macromolecular Science Part B-Physics
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2026
·
IF 1.7
Bowen Li,Liwei Wu,Bing Wang,Xinzhe Shi,Zhixiong Huang,Yanbing Wang
In the field of aerospace thermal protection materials, the balance between lightweight properties and ablation resistance represents the core design challenge. This study utilized vinyl methylene silicone rubber (VMQ) as the matrix, incorporating mesophase pitch (MP) as a ceramic-promoting agent or blending it with poly(dicyandiamide) elastomer (PDPP). Fillers including fumed silica, MoSi2, boron-containing phenolic resin (BPR), silica aerogel (SA), and hollow glass microspheres (HGMs). Results indicate that both low-density fillers reduce the density of silicone rubber composites, with HGMs exhibiting a more pronounced effect. The density of HGMs/SPMB(VMQ/PDPP) composites reached 1.131 g/cm³, representing a 22.7% reduction compared to SPMB. The addition of SA enhances the tensile mechanical properties of the material. The tensile strength and elongation at break of SA/SPMB reached 6.34 MPa and 121.6%, respectively, representing increases of 23% and 27%. The tensile strength and elongation at break of SA/SMMB(VMQ/MP) reached 7.84 MPa and 218.6%, respectively, representing increases of 32% and 15%. Thermogravimetric analysis revealed that the thermal stability of the composites improved with the addition of SA and HGMs. SEM analysis indicated that pyrolytic composites incorporating low-density fillers exhibited superior ablation performance.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2015
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IF 1.648
Qianqian Yao,Jun Ye,Qian Xu,Anchun Mo,Ping Gong
This study aims to evaluate in vitro degradability and osteoblast biocompatibility of dicalcium phosphate anhydrate/multi-(amino acid) (DCPA/MAA) composites prepared by in situ polymerization method. The results revealed that the composites could be slowly degraded in PBS solution, with weight loss of 9.5 ± 0.2 wt.% compared with 12.2 ± 0.2 wt.% of MAA copolymer after eight weeks, and the changes of pH value were in the range of 7.18–7.4 and stabilized at 7.24. In addition, the compressive strength of the composite decreased from 98 to 62 MPa while that of MAA copolymer from 117 to 86 MPa. Furthermore, with non-toxicity demonstrated by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide assay, the addition of DCPA to the MAA copolymer evidenced an enhancement of osteoblast differentiation and attachment compared with pure MAA materials regarding to alkaline phosphatase activity as well as initial cell adhesion. The results indicated that the DCPA/MAA scaffolds with good osteoblast biocompatibility, degradability, and sufficient strength had promising potential application in bone tissue engineering.
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ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Shijin Dai,Libing Liu,Hongping He,Bo Yang,Deli Wu,Youcai Zhao,Dongjie Niu
Molten salt has been increasingly acknowledged to be useful in the destruction of chlorine-containing organic wastes (COWs), e.g., organochlorine . However, the operational temperatures are usually high, and local structure and thermodynamic property of the molten salt remain largely unclear. In this study, novel molten NaOH-KOH is developed for organochlorine destruction, and its eutectic point can be lowered to 453 K with 1:1 mol ratio of NaOH to KOH. Further experiment shows that this molten NaOH-KOH is highly-efficient towards the destructions of both trichlorobenzene and dichlorophenol, acquiring the final dechlorination efficiencies as 88.2% and 94.1%, respectively. The organochlorine destruction and chloride salt enrichment are verified by fourier-transform infrared spectrometer . Molten NaOH-KOH not only eliminates the C-Cl and C C bonds, but also traps generated CO 2 , other acidic gases, and possibly particulate matters as a result of the high surface area and high viscosity. This makes it possibly advantageous over incineration for organic waste destruction for carbon neutrality . To sufficiently reveal the inherent mechanism for the temperature dependent performance, molecular dynamics simulation is further adopted. Results show that the radial distance between ions increases with temperature, causing larger molar volume and lower resistance to shear deformation. Moreover, thermal expansion coefficient, specific heat capacity, and ion self-diffusion coefficient of the molten NaOH-KOH are found to increase linearly with temperature. All these microscopic alterations contribute to the organochlorine destruction. This study benefits to develop highly-efficient molten system for COWs treatment via a low-carbon approach.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 2
·1302-1313
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IF 4.682
He Fupo,Qiu Chao,Wang Yao,Lu Teliang,Ye Jiandong
The aim of this study was to fabricate silicon/gallium co-substituted tricalcium phosphate bioceramics having the ability to promote osteoblast activities as well as hinder osteoclast activities. The silicon/gallium co-substituted tricalcium phosphates were synthesized with a solid-state reaction route, and their bioceramics were prepared by the process of molding and sintering. The bioceramics were characterized employing X-ray fluorescence spectroscopy, X-ray diffraction and scanning electron microscopy. Porosity and compressive strength tests, and experiments for in vitro cell response evaluation were performed. The results manifested that silicon/gallium co-substitution promoted transition of β-tricalcium phosphate to α-tricalcium phosphate and additionally gave rise to new phases of silicocarnotite and Ca 2 SiO 4 . In contrast to a single gallium substitution, the silicon/gallium co-substitution retarded the densification process but retained the high mechanical strength of bioceramics, and maintained the inhibitory effect of gallium on the osteoclast activities. The tricalcium phosphate bioceramics with substitutions of 2.5 mol% gallium and 10 mol% silicon possessed considerable mechanical strength, enhanced osteoblast activities and restrained osteoclast activities, so they were expected to efficiently reconstruct the bone defects in the environment of osteoporosis.
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Materials
·
2022
·Vol. 15
·期 17
·5857
·
IF 3.748
Muneeb Ahmed,Lisheng Zhong,Fei Li,Nuo Xu,Jinghui Gao
In this research, crosslinked polyethylene (XLPE) is developed with selective content of dicumyl peroxide (DCP), and the influence of microstructural properties and chemical composition on the mechanical and direct current (DC) dielectric properties are investigated. The measurements for the microstructural analysis are taken by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), gel content test and Fourier transform infrared (FTIR). The mechanical properties of XLPE are evaluated by hot-set test. The results of microstructural and chemical composition show that the increase in DCP content increases the crosslinking degree from 74.3% to 81.6%, reduces the crystallinity/lamella thickness from 36.8% to 35.5%/7.6–7.1 nm, reduces the average molecular weight between two crosslinks by 0.01 kg/mol and reduces the oxidation level/carbonyl index. The increase in DCP in XLPE samples decreases the permanent elongation from 2.2% to 0% and elongation rate from 300% to 80% of the cable insulation. The rise in DCP content increases the crosslinking degree due to which the DC resistivity and activation energy is increased. The DC breakdown strength at 30–90 °C is increased due to the increase in crosslinking degree and reduction in carbonyl index/oxidation level. The space charge accumulation is measured at 30 °C under 20–60 kV/mm, resulting in less homo-charges and hetero-charges with the increase in DCP. It is proven that the role of appropriate DCP content is vital in increasing the DC dielectric performance, internal material characteristics and mechanical performance of XLPE.Keywords:crosslinked polyethylene;dicumyl peroxide;crosslinking degree;HVDC;resistivity;breakdown strength;space charge
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MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 307
·期 1
·2100631
·
IF 4.367
Jinyun Wang,Tong Su,Wei Zhuang,Cheng Shi,Min Gao,Xiao Wu,Cong Lin,Tengfei Lin
The properties of polymer blends strongly depend on their microstructure. Thus, tuning the phase structure and improving the interfacial interaction of blends are relatively crucial. Inspired by the breaking and reformation of dynamic covalent bonds in vitrimers, these special bonds are introduced into the phase interface of polymer blends in this work. Through reactive blending of epoxidized natural rubber (ENR), polylactic acid (PLA) and additives, polymer blends with dynamic interfacial cross-linking are fabricated. The prepared blends with intensive interfacial interactions display excellent recycling capacity. Strikingly, after etching the dissolvable substances with a solvent, the porous phase structure of original polymer blends changes to a fiber-like phase structure of the third recycled blends, entirely distinct from most reported phase structures in polymer blends. In addition, the composites show great enhancements in mechanical properties during recycling. This work provides an effective method to tune the phase structure and improve the interfacial interaction of polymer blends.
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