CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Junsheng Guo,Wenzong Xu,Tao Yan,Jiayan Zhang,Xiaoyu Guo,Lingfeng Wang,Julan Liu
Polyvinyl alcohol (PVA) is a promising biodegradable polymer, but its widespread application is critically constrained by inherent flammability, limited UV resistance, and the mechanical compromises often incurred by conventional flame-retardant modifications. To address these challenges, a novel bio-based phosphorus‑nitrogen synergistic flame retardant (DPP) was developed from pyridoxal phosphate via a facile Schiff base condensation and P H addition route. This well-designed DPP was efficiently incorporated into PVA via a green melt blending process, yielding composites that achieved a simultaneous enhancement of multiple properties. With a 10 wt% DPP loading, the composite exhibited exceptional flame retardancy, achieving a limiting oxygen index (LOI) of 30.5%, a UL-94 V-0 rating, along with a 63.2% reduction in its peak heat release rate (PHRR) and a 32.7% decrease in total heat release (THR). Additionally, it provided outstanding UV shielding performance, with an ultraviolet protection factor (UPF) of 362 and over 99.7% blocking of both UVA and UVB radiation. Impressively, its tensile strength was enhanced to 25.2 MPa, thus overcoming the common performance trade-off. This multifunctionality stems from DPP's well-orchestrated molecular design: it operates through a vapor- and condensed-phase synergistic flame-retardant mechanism and intrinsic UV absorption, while its strong interfacial hydrogen bonding with PVA constructs a physical crosslinking network, underpinning the concurrent mechanical enhancement. This work presents a strategy for fabricating sustainable, high-performance, multifunctional PVA materials. The PVA/DPP composites obtained via this strategy show promising potential for advanced applications such as outdoor protection and safe electronics packaging.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Liu Xiangyun,Chai Youzheng,Gu Yuwei,Li Yongqi,Wang Xiao,Wang Qiancheng,Zhang Gong,Liu Huijuan,Qu Jiuhui
High-salinity mine water generated during membrane concentration of mine water contains structurally stable complex organic matter that resists removal and mineralization by conventional advanced oxidation processes, ultimately producing low-value by-product salts that hinder the resource utilization pathway. Leveraging the ultraviolet sensitivity of inherent chromophore groups and conjugated structures, this study developed an ultraviolet-activated assisted electrochemical process. By harnessing ultraviolet/oxidant synergies, this approach achieves ~89.9% total organic carbon removal, with minimal performance decay over 1000 hours. Combined with ultraviolet-visible spectroscopy, fluorescence excitation-emission-matrix spectroscopy, fourier transform ion cyclotron resonance mass spectrometer, and model contaminant experiments, this study elucidates an ultraviolet activation and radical attack synergistic mechanism driving organic mineralization. The direct integration of purified brine with bipolar membrane electrodialysis successfully produces acid, high-purity alkali (>99%), and reusable water, thereby closing the loop of impurities removal and resource recovery. This integrated system offers a strong strategy for high-value resource recovery and sustainable mine water management.
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高影响因子
POLYMER
·
2026
·
IF 5.1
Guanjun Liu,Zhen Tian,Conghao Jiang,Ying Liu,Lu Wang,Meiling Yan,Fan Yang,Rongguo Wang
Understanding hydrogen transport in polymer nanocomposites requires correlating permeation parameters with structural factors. Here, functionalized graphene oxide (fGO) was incorporated into polyamide 6 (PA6) through in situ polymerization, and an integrated analysis of permeation behavior and structural factors was used to identify the dominant barrier mechanism in fGO/PA6 nanocomposites. Scanning electron microscopy and Raman mapping revealed relatively uniform fGO dispersion at low loadings, whereas aggregation occurred at 1.0 wt%. The hydrogen permeability coefficient decreased from 3.55 × 10 −14 cm 3 cm cm −2 ·s −1 Pa −1 for neat PA6 to 1.89 × 10 −14 cm 3 cm cm −2 ·s −1 Pa −1 at 0.5 wt% fGO, corresponding to a reduction of 46.8%. Analysis of diffusivity and apparent solubility showed that the barrier enhancement was diffusion dominated, despite increased apparent solubility. Temperature-dependent permeation measurements from 23 to 85 °C showed that hydrogen permeability increased with increasing temperature, while 0.5 wt% fGO/PA6 nanocomposites retained lower permeability than neat PA6 throughout the tested temperature range. Nielsen model fitting, dynamic mechanical analysis, and positron annihilation lifetime spectroscopy indicated that diffusion suppression arose from the combined effects of a tortuous diffusion pathway, restricted segmental motion, and reduced free volume fraction, as reflected by weakened β relaxation, an α relaxation shift from 33.4 to 36.3 °C, and a free volume fraction decrease from 1.23% to 1.13%. Differential scanning calorimetry and X-ray diffraction revealed slight crystallinity changes and essentially unchanged crystal structure, indicating that crystalline variations were not the primary origin of barrier enhancement. These results provide a comparative structure-transport analysis for diffusion-dominated hydrogen transport in fGO/PA6 nanocomposites.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Liu Guan-Jun,Yan Mei-Ling,Tian Zhen,Wang Lu,Yang Fan,Wang Rong-Guo
Hot pressing is widely used to tailor the structures and properties of polymer composites. However, how it drives structural evolution and thereby affects barrier, mechanical, and thermal properties remains insufficiently understood. In this work, graphene oxide-grafted carbon nanotube/polyamide 6 (GO- g -CNT/PA6) composites were subjected to hot pressing at different radial expansion ratios ( ε =0, 2, and 4) to investigate the flow-induced structural evolution and the resulting property changes. Scanning electron microscopy and transmission electron microscopy observations revealed that hot pressing promoted the rearrangement and preferential alignment of the hybrid nanofillers, while two-dimensional wide-angle X-ray diffraction confirmed the enhanced crystalline orientation after hot pressing. Differential scanning calorimetry showed increased crystallinity in both the neat PA6 and GO- g -CNT/PA6 composites. Representative positron annihilation lifetime spectroscopy analysis further indicated a reduction in the fractional free volume, whereas the characteristic size of individual free-volume holes remained nearly unchanged. The results indicate that the optimal hot-pressing condition is property-dependent. A moderate deformation at ε =2 is more favorable for improving the hydrogen barrier and tensile properties, whereas a stronger deformation at ε =4 is more effective in promoting in-plane heat transport. These findings establish a correlation between the processing, structural evolution, and multifunctional properties of GO- g -CNT/PA6 composites, providing guidance for the design of PA6-based liner materials for Type IV hydrogen storage vessels.
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COMPOSITES PART B-ENGINEERING
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2026
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IF 14
Guanjun Liu,Meiling Yan,Conghao Jiang,Ying Liu,Zhen Tian,Fan Yang,Rongguo Wang
Hydrogen barrier materials capable of retaining effective barrier performance after mechanical damage are highly desirable for hydrogen storage and transportation applications. Here, we report a functionalized graphene oxide reinforced polyurethane nanocomposite containing Diels-Alder (DA) bonds, denoted as fGO/PU-DA, in which dynamic DA linkages were incorporated into both the polymer matrix and the nanofiller-matrix interface. The 5 wt% fGO/PU-DA nanocomposite achieved a tensile strength of 9.8 MPa, corresponding to a 75% increase over neat PU-DA, while maintaining a favorable balance between strength and ductility. After cut-healing treatment, the nanocomposite recovered nearly all of its tensile strength, whereas its elongation at break and toughness exceeded their original values even after three damage-healing cycles, highlighting the contribution of interfacial DA bonds to healing efficiency. The hydrogen permeability coefficient decreased from 2.4 × 10 −12 for neat PU-DA to 8.6 × 10 −13 cm 3 cm cm −2 ·s −1 Pa −1 for the 5 wt% fGO/PU-DA nanocomposite, corresponding to a reduction of 64%. Even in the healed state, the permeability remained markedly lower than that of healed PU-DA, indicating a clear barrier advantage after macroscopic damage. Mechanistic analysis indicated that the enhanced barrier performance was diffusion-dominated and originated from interfacial confinement together with reduced cooperative segmental mobility. The material was further validated as a coating on polyamide 6 substrates, where the fGO/PU-DA layer also delivered improved hydrogen barrier performance. These results demonstrate that coupling matrix-level reversible reconstruction with interfacial dynamic DA bonding provides an effective route to polyurethane nanocomposites integrating self-healing capability, mechanical robustness, and superior hydrogen barrier performance.
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CRYSTAL GROWTH & DESIGN
·
2025
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IF 3.4
Kaiwei Wang,Fumin Wang,Xubin Zhang,Yi Zhai,Mingshuai Sun,Yan Chen,Jiaxing Zhang,Yihao Wang,Hongyu Wang,Yang Qin,Hao Ruan,Xuyang Zou
The nanosheet MFI zeolite synthesized with a short b-axis length exhibits broad potential for industrial applications due to its ability to facilitate mass transfer through the large straight-through channel along the b-axis. The current focus of research lies in the regulation of the zeolite crystal anisotropic growth rate through the addition of specific additives to the precursor liquid. The range of available additives, however, is limited, and their effects as well as potential mechanisms are still poorly understood. The impact of incorporating ten mononitrogen compounds into the gel on crystal growth was investigated. The influence of the N-containing compounds (functional group, C/N ratio, electrostatic potential of N atoms, and compound concentration) and growth time on crystal size was analyzed. N,N-dimethylformamide (DMF) and N-methylformamide (NMF) were revealed as potential inducers of the nanosheet zeolite. Herein, the effect of DMF on the nonclassical growth of the nanosheet zeolite is unveiled within crystallization engineering. The effects of various synthetic parameters on the DMF-assisted synthesis of nanosheet zeolites were also investigated. It is revealed that DMF plays a role in accelerating crystal growth and in regulating anisotropic crystal growth. This strategy can be extended to the synthesis of different heteroatomic nanosheet zeolites (such as Al-MFI, Fe-MFI, and Ti-MFI), and it is suitable for different types of silicon and metal sources. This study presents a straightforward strategy for the systematic and precise design and synthesis of nanosheet MFI zeolites, which exhibits significant potential for industrial utilization.
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NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.5
Xiaojun Bao,Yu Cao,Lei Gong,Renjiang Li,Dongshun Deng
As an important and free amino acid, taurine (Tau) shows extensive application in pharmaceuticals. The coexistence of inorganic salts during the production process affects the purity and quality of Tau. Present study firstly described a novel method to separate Tau and Na2SO4 by forming deep eutectic solvents (DESs) in situ. Ethanolamine (MEA) was chosen as the optimal hydrogen bond donor to pair with Tau. After removal of Na2SO4, taurine was stripped out from in situ DES using n-propanol as reverse solvent with the yield of 98% and trace impurities (Na2SO4 and NaCl contents less than 13.70 mg•g -1 and 12.93 mg•g -1 , respectively). On the optimized parameters, the Tau purification and separation process were further elucidated using quantum chemical calculations and molecular dynamics simulations together. Results showed the interaction energy of 116.1 kJ/mol between MEA and Tau, confirming the superiority of Tau purification using DES in situ.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Min Jiang,Bo-Wen Liu,Feng-Ming He,Qin Zhang,Ao Wang,De-Ming Guo,Hai-Bo Zhao,Li Chen,Yu-Zhong Wang
Although conventional chemical copolymerization method has shown favorable results in improving certain performance of polymers, simultaneous improvement of overall properties is hardly achieved. Here, we reported a feasible method to fabricate high-performance polymers with great overall properties by simultaneously tailoring their chemical constitution and topological conformation. We designed and synthesized a novel functional monomer with a sidechain caged structure based on phosphorus chemistry, and prepared the corresponding aliphatic polyamide as a typical representative of thermoplastic synthetic polymers. The incorporation of a sidechain caged structure enhanced the chain entanglement of the resultant polyamide, thus improved the mechanical strength by 39% and largely enhanced the heat resistance. The great processability was basically uninfluenced due to the easy dissociation of the entanglement during processing, enabling the potentially wide application fields as both fibers and engineering plastics. Furthermore, based on the free radical scavenging effect of the phosphorus-based monomer, the flame retardancy of the resultant polyamide was significantly improved. In sight of these findings, this work provides a novel method for fabricating high-performance polymers for various applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Qin Zhang,Guo-Rui Zhu,Xiang-Xin Xiao,Qing-Song Liu,Min Jiang,De-Ming Guo,Hai-Bo Zhao,Wen-Da Li,Li Chen,Bo-Wen Liu,Yu-Zhong Wang
Constructing micro cross-linking structures into molecular chains has demonstrated the ability to improve basic properties, such as mechanical strength and thermal stability, of thermoplastic polymers. However, this method has limitations when it comes to improving the functionality of polymers. Herein, we reported a multifunctional micro cross-linking network that improves not just mechanical strength but also flame retardancy, dielectric properties, battery performance, antistatic properties, etc . A novel phosphinamide-containing monomer was designed, synthesized, and copolymerized into the polymer chain of polyamide 6, a typical thermoplastic polymer. On the one hand, the micro cross-linking structure was successfully obtained through the amide interchange reaction between the side-chain phosphinamide groups and the main-chain amide groups, leading to a 23.7% improvement of tensile strength and largely maintained tensile toughness. On the other hand, the functional phosphorus groups showed an efficient free-radical-capturing effect during fire, endowing the copolymer with excellent flame retardancy at a low monomer content of 2 mol%. Additionally, the copolymer also possessed great spinnability, melt-crystallization performance, as well as dielectric property, antistatic property, and battery performance, enabling its potential in a wide variety of applications.
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POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Yanlu Sun,Zhengqi Wang,Dequn Wu,Xueli Wang,Jianyong Yu,Ruchao Yuan,Faxue Li
The absence of inherently flame-retardant polyamide 6 (FR-PA6) with enhanced anti-dripping and melt spinnability has significantly limited its further application in textiles. In this work, a binary reactive flame retardant composed of commercial 9,10-dihydro-10-[2,3- di ( hydroxycarbonyl ) propyl ]-10-phosphaphenanthrene-10-oxide (DDP) and synthesized polydiphenylsiloxane (PDPS) was employed to fabricate FR-PA6 through a facile synthetic route. The prepared FR-PA6 containing 5 wt% DDP and 5 wt% PDPS (FR-PA6-5-5) exhibited a UL94 V-0 rating with no melt-droplets during combustion, a 31.0% reduction in heat release rate and a 18.8% decrease in total heat release compared to pure PA6 in cone calorimetric tests. The improved fire safety of FR-PA6-5-5 was contributed to the gas-phase quenching and dilution effect and the condensed-phase barrier effect, which was enhanced by the synergistic charring effect achieved through the formation of P(= O )-O-Si. Additionally, FR-PA6-5-5 exhibited excellent melt spinnability as demonstrated by the successful preparation of filaments with a tensile strength of approximately 2.27 cN/dtex.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Yaqi Zhang,Linli Tan,Na Han,Shiwei Tian,Wei Li,Wei Wang,Yutong Wu,Zhongshun Sun,Xingxiang Zhang
The separation of oil-in-water and water-in-oil emulsions with high efficiency and environmental friendly remains a challenge in the past decade. This work describes a new method to improve the trade-off of the poly(acrylonitrile- co -methyl acrylate) (P(AN-MA))-based membrane for water/oil separation. P(AN-MA) microfiltration (MF) membrane was fabricated via thermally induced phase separation (TIPS) method in this study. Then, some of the –CN groups and –COOCH 3 groups were converted to –COOH groups via hydrolyzing. Finally, the selected wettability was attained by grafting PEI on one side while ZIF-8 was anchored to the other side via self-assembly and in-situ interfacial reaction methods. The ZIF-8/P(AN-MA) hybrid MF membranes are superoleophobic underwater on the PEI side while super-hydrophobic under oil on the ZIF-8 side, which can efficiently and accurately separate oil-in-water and water-in-oil emulsions at a low pressure (0.01 MPa). The separation fluxes of the PEI side were as high as 3053 L/m 2 h and 1035 L/m 2 h respectively, for the surfactant-free mixtures and surfactant-stabilized emulsions. For water-in-oil emulsions, the fluxes were up to 2316 L/m 2 and 878 L/m 2 h on the ZIF-8 side, respectively. The separation efficiency of all the mixtures and emulsions was higher than 97.5 %. Moreover, the Janus membranes showed excellent anti-oil-fouling and anti-water-fouling properties on the two sides of the membranes, as well as remarkable durability during the 10 cycles in oil/water separation. Hence, Janus ZIF-8/P(AN-MA) hybrid MF membranes show potential application prospects in oil/water separation.
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JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 8
·1475-1485
·
IF 2.909
Xu Jiaopeng,Chen Yingbo,Cao Ming,Wang Chuanfeng,Guo Pengfei
Solar steam generation (SSG) system greatly improves the efficiency of water evaporation through heat localization, which has broad application prospects at seawater desalination and wastewater treatment. In this paper, polyamide 6-graphene oxide (PA6-GO) membrane was fabricated by nonsolvent-induced phase separation of a solution with GO-modified PA6 in formic acid. Furthermore, the PA6-GO membrane was modified by vacuum filtration of self-assembly gold nanoparticles on its surface for solar stem generation. The composite membrane obtained a light absorption rate of nearly 99.8%. Under the irradiation of 1 kW m −2 , the evaporation rate of 1.1 kg m −2 h −1 was obtained and the evaporation efficiency also reached to 75.6%. The evaporation system has the characteristics of low cost, high stability, strong acid, and alkali corrosion resistance, suggesting great potentials in seawater desalination and sewage treatment. Graphical abstract
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危险品化学品经营许可证（带存储）