JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 137
·期 17
·48617
·
IF 2.188
Bing Yang,Yu Zhou,Hongxiang Chen,Song Zhang,Jingyi Liu
In order to improve the dispersity and stability of nano-SiO 2 aqueous system with high solid content, acrylic acid/allyloxy polyethylene glycol copolymer dispersants with methoxysilicon end groups (KH590-AA x -APEG y ) were synthesized by photopolymerization. After adding KH590-AA x -APEG y into the nano-SiO 2 aqueous system, the viscosity, the curing time, the particle size, and the zeta potential of these systems were respectively measured. The results showed that introducing polyethylene glycol chain into the dispersant was beneficial to better exerting its electrostatic repulsion and steric hindrance effects and further improving the dispersibility of the nano-SiO 2 aqueous system. Moreover, the dispersion stability of SiO 2 nanoparticles in water was closely related to the composition, the molecular weight, and the addition amount of KH590-AA x -APEG y and the solid content. When the molecular weight of KH590-AA x -APEG y was 3200 g mol −1 and its addition amount was 0.1 wt %, the nano-SiO 2 aqueous system with 20 wt % solid content showed the best dispersity and stability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48617.
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DESALINATION
·
2025
·
IF 9.8
Xinxia Tian,Jian Wang,Yangyang Wei,Lei Tian,Yang Yang,Yan Jin,Zhaokui Li
The intrinsic structure of the polyamide separation layer fundamentally governs the performance of reverse osmosis (RO) membranes. In this study, environmentally friendly diethylene glycol dimethyl ether (DEGDME) was used as co -solvent to modulate the interfacial polymerization process and subsequently regulate the structure of the separation layers. Small-angle X-ray scattering (SAXS), alongwith conventional methods, was utilized to investigate the multi-scale structure of the separation layers, including morphology and aggregation at the nanometer scale. The fractal dimension ( P 2 ) derived from SAXS exhibited a strong linear relationship with the water permeability coefficient A ( R 2 = 0.9984), and an exponential relationship with NaCl permeability coefficient B ( R 2 = 0.9265) when the DEGDME content was not exceed 0.5 wt%. At a DEGDME content of 0.3 wt%, the water flux of the RO membrane reached 69.8 L·m −2 ·h −1 , exhibiting a 105.3 % increase compared to the original membrane, with no significant loss in NaCl rejection. Additionally, the RO membrane M-0.3 demonstrated excellent antifouling properties and long-term operational stability. Given the simplicity and efficacy of the co-solvent regulation method, it holds significant potential for practical applications.
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高影响因子
POLYMER
·
2024
·
IF 4.1
Yongsheng Li,Congcong Xu,Yiwei Gao,Yikun Zhu,Hongchao Wang,Chongbin Wang,Yuanyuan Feng
Membrane separation is an effective method for water purification . However, conventional preparation processes for the membranes usually suffer from complicated production technology and lack versatility. Mussel-inspired chemistry has generated extensive interest in exploring a facile strategy for the preparation of polymeric membranes . In this work, a simple, green and time saving strategy is proposed for accomplishing the surface functionalization via one-step polymerization and co-deposition of dopamine/zwitterion/poly(ethylene glycol) diacrylate (PEGDA). The chain segment of the zwitterion can tightly bind water molecules upon the membrane surface, enhancing the hydrophilicity of the membrane. The chain segment of PEGDA can offer cross-linking sites during the co-deposition process, facilitating the formation of the network structure. The retention to dyes for the membranes prepared with PEGDA was higher than those membranes prepared without PEGDA. The optimized membrane exhibited high water permeance up to 25.9 L m −2 h −1 bar −1 , with rejection of 99.7 % and 99.6 % for Methyl blue and Congo Red. Meanwhile, the anti-bacterial rate for the optimized membrane reaches 75.9 %, and the water flux recovery rate (FRR) is as high as 86.65 %. The results cast a light on the exploration of the PDA-based NF membranes , featuring simple production technology and versatile capabilities for the separation of various dyes.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 16
·D908
·
IF 3.12
Xinkuai He,Zhengyang Sun,Qingtian Zou,Jingjing Yang,Luye Wu
The codeposition behavior of Co(II) and Ni(II) in 1-ethyl-3-methylimidazolium bisulfate ([EMIM]HSO4) ionic liquid (IL) and ethylene glycol (EG) system is recorded using cyclic voltammetry (CV). The result indicates that the mechanism of Co-Ni codeposition is an anomalous codeposition, and both the inhibition for Ni(II) reduction and the anomalous codeposition phenomena can be improved by the increase of Co(II) concentration in the system. These Co-Ni deposits are characterized using EDS, XRD and SEM. SEM micrographs indicate that the surface morphology of Co-Ni deposits can be changed by the increase of Co content, and these deposits with many additional elongated acerose crystals, which are germinated on the spherical “nodules” surface, can be prepared. XRD pattern reveals the feature peak of crystalline Co1.2Ni2.8 with a preferred orientation direction and the average size of grains is calculated to be about 14.6 nm. Moreover, the electrocatalytic activity for hydrogen evolution reaction (HER) on the prepared Co-Ni catalyst surface is investigated using linear sweep voltammetry (LSV) and electrochemical impedance spectra (EIS). These results indicate that the obtained catalyst presents an excellent electrocatalytic activity and durability for HER with an overpotential of 139 mV at 10 mA cm−2 in 1 M KOH solution.
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CHINESE JOURNAL OF POLYMER SCIENCE
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2026
·
IF 4.6
Qian Yue-Yuan,Sun Xiang-Bin,Liu Ya-Lei,Li Zhi-Bo
As plastic pollution has become increasingly severe, the development of recyclable and rapidly degradable polyesters has significant practical value and significance. In this study, seven-membered cyclic 1,3-propylene glycol oxalate (POx) was successfully synthesized through a two-step polycondensation-depolymerization method using dimethyl oxalate (a low-cost and readily accessible bulk chemical) and bio-based 1,3-propylene glycol as the starting materials. Using Sn(Oct) 2 as the catalyst, high-molecular-weight poly(1,3-propylene oxalate) (PPOx) was efficiently prepared via ring-opening polymerization (ROP) of POx. This ROP demonstrated excellent reactivity, attaining a monomer conversion up to 95% within 10 min, and PPOx had a maximum intrinsic viscosity ( η ) of 1.06 dL/g. Furthermore, the prepared PPOx could be catalytically depolymerized to enable efficient recovery of the POx monomer, with a yield of 60% and a purity of 98%. The degradation performance tests indicated that PPOx exhibited rapid degradation, reaching a degradation rate of up to 99% within 50 days. Owing to the innovative selection of raw materials and the design of a closed-loop process, this study provides a new economical and sustainable strategy for reducing dependence on petroleum resources, offering valuable insights into the development of recyclable and rapidly degradable polyesters.
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2026
·
IF 3.2
Tao Zhu,Xujing Zhang,Yan Xu,Wu Wang,jiahao Ma,Zhitao Yin,Yutong Chen
This study prepared a composite hydrogel using polyethylene glycol diacrylate (PEGDA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as raw materials, aiming to investigate the relationship between its hydration lubrication mechanism and friction behavior. By adjusting the mass fractions of PEGDA and AMPS, the hydrogel’s mechanical properties were matched to those of articular cartilage, achieving a compressive modulus of 3.63 MPa. Friction tests revealed that the hydrogel exhibited a low coefficient of friction, consistently maintained within the range of 0.01–0.03 under various frequencies and load conditions, while demonstrating excellent lubrication stability throughout 7200 cycles of testing. Wetting and swelling tests demonstrate that AMPS effectively enhances the hydrogel’s hydrophilicity while suppressing swelling, simultaneously increasing the bound water content within the system. Molecular dynamics simulations validate the excellent compatibility between PEGDA and AMPS. Constrained shear simulations reveal the hydrated lubrication layer’s crucial role in mitigating shear stress, dispersing heat dissipation, and maintaining lubrication stability.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
·
IF 7.9
Lin-Jie Xie,Jun-Cheng Jiang,Chen Liang,Qing-Song Wang,Hui-Qi Sun,Yan Tang,An-Chi Huang,Fei-Hao Zhu,Chi-Min Shu
Operating Ni-rich layered cathodes like LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) at high voltages accelerates interfacial degradation, creating significant thermal runaway risks. Here we propose a strategy using a polymer interphase to enhance the intrinsic safety of the cathode material. We synthesized a polyaniline-polyethylene glycol (PANI−PEG) composite coating with optimized molecular weight using a mild solution process that requires no annealing. The pristine and coated cathodes were comprehensively evaluated via electrochemical testing, surface and structural analysis, and simultaneous thermal measurement using thermogravimetric−differential scanning calorimetry (TG−DSC). The results show a clear dependence on PEG molecular weight. The optimized PANI−PEG300 promotes the formation of a mechanically compliant, LiF/Li 2 CO 3 enriched cathode electrolyte interphase, which helps buffer micro-strain accumulation and stabilize the surface chemistry during 2.8−4.4 V cycling. Surface analysis indicates fewer reactive oxygen species after cycling, with the surface active-oxygen fraction decreasing from 27.8% to 13.2%. Importantly, TG−DSC on harvested charged cathodes reveals a lower overall exothermic heat release for PANI−PEG300@NCM811, with ΔH decreasing from 98.313 to 84.557 J/g, together with delayed thermal decomposition, indicating a moderated thermal runaway source term. These changes point to reduced cathode thermal reactivity after high-voltage cycling. This work establishes a quantitative link between polymer molecular design and thermal hazard reduction, offering metrics derived from calorimetry for hazard screening and the inherently safer design of high-energy cathodes.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Junwei Zhang,Yongkang Li,Su Xu,Liyuan Si,Jingfa Zhou,Ruiguang Xing,Huitao Yu,Xin Ge,Wei Feng
Flexible organic phase-change films hold great promise for wearable thermal energy management and storage. However, their widespread application is hindered by the inherent liquid leakage of phase-change components and the common trade-off among mechanical flexibility, high latent heat, and shape stability. This study pioneers a novel reverse nano-encapsulation strategy. In this approach, La 3+ ions are directly introduced into a blend of PEG and XSBR latex, triggering the demulsification of the latex into discrete rubber particles. Subsequently, coordination cross-linking between oxalic acid and these La 3+ ions assembles the discrete particles into a continuous rubber phase. This process ultimately achieves the reverse nano-encapsulation of PEG, yielding a flexible phase change composite film characterized by a nanoscale sea-island structure. The prepared flexible film exhibits a remarkable latent heat of 92.65 J/g with high nanoencapsulation efficiency, which maintains 95.5% of its latent heat after 500 thermal cycles, demonstrating exceptional thermal reliability. Crucially, the material retains excellent mechanical flexibility, shape adaptability, and foldability, inherited from the elastomeric matrix. Benefiting from these integrated properties, it's applied in wearable thermal management, where it can be heated to 60 °C using a low voltage (1.5 V). Furthermore, a proof-of-concept device is developed, demonstrating stable and efficient solar-thermal-electric energy conversion. This work provides a groundbreaking pathway for designing high-performance, flexible phase-change materials for advanced energy applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Xingyu Tian,Yinbo Zhao,Weizhong Yuan
Phase change materials (PCMs), capable of absorbing and releasing thermal energy during phase transitions, hold significant potential for thermal energy storage applications. Low molecular weight polyethylene glycol (LPEG, Mw = 8000 g/mol) stands out as an exceptional PCM owing to its environmental benignity, non-toxicity, non-corrosiveness, high storage capacity, minimal volume variation during phase transition, chemical stability, low supercooling degree, and cost-effectiveness. However, LPEG undergoes a solid-liquid phase transition, which leads to leakage issues. To address this, ultra-high molecular weight PEG (HPEG, Mw = 8 × 106 g/mol) was incorporated with LPEG to fabricate solid-solid phase change membranes via physical entanglement of internal molecular chains. These membranes exhibit excellent thermal stability and solid-solid phase transition behavior, accompanied by a high phase change enthalpy of 173.5 J/g, endowing them with superior thermal insulation performance and favorable cyclic thermal reliability. Additionally, thermal-induced shape memory effect was achieved through the reversible crystallization-melting of HPEG molecular chains. Upon integration with thermochromic microcapsules and afterglow luminescent particles, the membranes further demonstrate thermochromic and photoluminescent properties. Consequently, the resulting solid-solid phase change composite membranes can be applied in thermal insulation for high-temperature equipment, nighttime indication, and information encryption, thereby offering a promising strategy for the development of multifunctional polymeric phase change materials.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2026
·
IF 2.4
Yulong Li,Fengzhi Li,Yang Xiao,Wenyu Ma,Yan Wang,Wangfeng Cai
The isobaric vapor–liquid equilibrium (VLE) data for the binary system of ethylene glycol diacetate (EGDA) and 1,2-butanediol diacetate (1,2-BDDA) were measured at 5.00, 10.00, and 15.00 kPa using a modified Rose–Williams equilibrium still. The thermodynamic consistency of the experimental data was confirmed by Fredenslund and Van Ness tests. The measured data were correlated with the nonrandom two-liquid (NRTL), universal quasi-chemical, and Wilson activity-coefficient models, and the corresponding binary interaction parameters were obtained through regression. The accuracy of each model was evaluated using the root-mean-square deviations (RMSDs) of the vapor-phase mole fraction (y1) and equilibrium temperature (T). All three models satisfactorily reproduced the experimental results, with the NRTL model showing the best agreement. The reliable VLE data and correlations reported in this work provide essential thermodynamic information for the modeling and design of separation processes involving EGDA and 1,2-BDDA.
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ACS Nano
·
2026
·
IF 17.3
Tian Tong,Min Xu,Entian Cui,Zhongye Cao,Qiu Wan,Fangmu Wang,Shuai Yin,Meng Tian,Gazi Hao,Wei Jiang,Jinhua Ye,Guigao Liu
Photocatalytic methanol coupling holds great promise for the sustainable production of value-added ethylene glycol (EG) and hydrogen yet remains challenging due to the difficulty in achieving selective C–H activation associated with spin-state transitions. Here, we develop a spin-polarized photocatalyst (sp-Mo1/ZCS) by anchoring asymmetric spin-state Mo single-sites onto ZnCdS, enabling selective C–H activation through quantum spin exchange interactions. Consequently, it demonstrates exceptional EG selectivity (97.6%), yield (236.2 mmol g–1), turnover number (1417.2 molEG molMo–1), and catalytic durability (over 100 h) in photocatalytic methanol coupling, with the EG production rate outperforming standalone ZnCdS by over an order of magnitude. We reveal that the spin-polarized Mo single-sites enhance surface polarization, thereby accelerating charge-carrier separation and migration. More importantly, they facilitate the spin-state transition of C–H activation to generate •CH2OH and the subsequent C–C coupling, consequently improving the selectivity and efficiency of EG synthesis. This study highlights the pivotal role of spin-implantation in steering C–H activation for efficient photocatalytic methanol coupling and related reactions.
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高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2026
·
IF 2.5
Jiarui Zhang,Sijia Tong,Si Cheng,Jiale Liu,Shuang Feng,Yue Deng,Xinyue Zhou,Yalin Xi,Meiyun Shi,Lei Yin
A green and highly selective Ultra-Performance Convergence Chromatography with MS 3 (UPC 2 -MS 3 ) method was developed for the quantification of M-PEG₆-OH in rat plasma. • The MS 3 detection provided exceptional specificity by effectively eliminating matrix interferences and offered a superior signal-to-noise ratio compared to conventional MRM. • Utilizing supercritical CO₂ as the primary mobile phase enabled a 1.5 min analysis, significantly reducing organic solvent consumption and aligning with green chemistry principles. • The fully validated method was successfully applied to characterize the pharmacokinetic profile of M-PEG₆-OH in rats. The quantification of hydrophilic polyethylene glycol (PEG) derivatives in biological matrices is often hindered by poor chromatographic retention and severe matrix effects in conventional reversed phase systems. This study addresses these challenges by developing a novel, green analytical platform integrating ultra-performance convergence chromatography (UPCC) with triple mass spectrometry (MS 3 ) detection. The method leverages the orthogonal separation mechanism of UPCC to achieve superior resolution within an ultra-short 1.5 min analytical cycle. Notably, the MS 3 acquisition strategy effectively eliminated background chemical noise, resulting in a 4.7-fold enhancement in the signal to noise ratio compared to standard MRM modes at the lower limit of quantification (LLOQ) level. The methodology was rigorously validated according to FDA guidance (adopted from the ICH M10 guidelines) over a range of 10–1000 ng/mL, demonstrating an LLOQ of 10 ng/mL. Quantitative greenness evaluation via AGREE (0.75) and BAGI (77.5) metrics confirmed the environmental sustainability of the approach. Successfully applied to a pharmacokinetic study in rats, this robust UPCC-MS 3 platform provides a high performance, compliant, and ecofriendly tool for the biological disposition assessment of PEG based therapeutics. In conclusion, the established platform successfully harmonizes high-throughput bioanalytical efficiency with green chemistry principles, demonstrating outstanding technical superiority and structural compliance for seamless integration into standardized laboratory workflows within the pharmaceutical industry. Download: Download high-res image (260KB) Download: Download full-size image
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高影响因子
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