JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 33
·e55829
·
IF 2.7
Tianyu Liu,Dandan Chen,Feng Gao,Yuchen Song,Zhuo Zheng,Jian Kang,Ruizhang Xu,Xiaojun Zhang,Yue Zhang,Zhihui Xie,Ming Xiang
Polyethylene-supported nanofiltration (NF) membranes have been reported for several cases in recent years. However, few have disclosed a NF membrane which achieves a high salt/water separation efficiency. Here, a novel polyamide NF membrane was prepared by conducting interfacial polymerization on poly(vinyl alcohol)-decorated polyethylene separator. The polyethylene-supported NF membranes were systematically investigated with respect to chemical structures, microscopic morphology, surface properties, as well as desalination performance. In particular, a distinctive morphology transformation occurred on the polyamide layers through regulating poly(vinyl alcohol) loading amounts. Performance testings demonstrated the optimal membrane reaches a water permeance over 17.4 L·m −2 ·h −1 ·bar −1 and Na 2 SO 4 rejection above 98.7%, as well as favorable performance stability. This work may provide some consideration for fabricating NF membranes with new support layers and good desalination performance.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Mingyu Zhang,Mohammed Kamal Hadi,Dongli Guo,Tao Yao,Fen Ran
In recent years, a series of high-performance ultrafiltration membranes have been developed, but maintaining high flux and high pollutant retention rate without sacrificing service life remains a long-standing challenge. In this study, a porous polyethersulfone ultrafiltration membrane enriched with ZIF-8 and TiO 2 additives is prepared based on a non-solvent induced phase separation method. During the phase transition process, the addition of organic nanocrystals ZIF-8 and inorganic nanocrystals TiO 2 delayed the phase transition rate, resulting in the transformation of the polyethersulfone modified membrane from a finger-like pore structure to a sponge-like pore structure. Compared to other structures, the sponge-like modified membrane has a uniform and narrow pore size distribution, fewer surface defects, stable retention performance, and can simultaneously improve membrane permeability and mechanical strength. Therefore, the polyethersulfone modified membrane with a sponge-like pore structure prepared in this research exhibits high flux for small molecules and good retention rate for large molecules. Long-term cycling stability tests of the modified membrane shows high retention rate (over 98%), high flux, long service life, and good cycling stability for solute molecules. The study indicates that the prepared polyethersulfone modified membrane has high potential for application in relevant environmental separation processes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55704
·
IF 2.7
Ke Yang Ni,Zhao Xin Zhang,Ai Ping Zhang,Jun Bian,Xin Kang Li,Cong Wei,Hai Lan Lin,Dai Qiang Chen
Herein, graphene oxide (GO) and its derivative, reduced GO ( r GO) and p -phenylenediamine (PPD) functionalized GO (GO- g -PPD) were first synthesized and selected as dielectric fillers, and then GO/polyimide (PI), r GO/PI, and GO- g -PPD/PI dielectric nanocomposites were fabricated through in situ polymerization-composition strategy. Fourier transform infrared, Ram, and x-ray diffraction analysis confirmed the success synthesis of r GO and GO- g -PPD dielectric fillers. The mechanical properties showed that GO- g -PPD/PI nanocomposites exhibited the highest tensile strength and elasticity modulus. TGA analysis revealed that the enhancement of thermal stability by addition of dielectric fillers. The dielectric constant of 2.5 wt.% GO- g -PPD/PI nanocomposites reached 25.05, which was 8.55 times that of pure PI (2.93). Energy storage performance tests showed that the energy storage density of GO- g -PPD/PI containing 2 wt.% filler reached 0.77 J/cm 3 , which was 71% higher than pure PI. These findings underscore the potential of GO derivative as a cost-effective reinforcement for PI dielectric nanocomposites for high-temperature capacitive energy storage applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 38
·e55984
·
IF 2.7
Qi Zhang,Zihan Xiao,Zhiyuan Zhang,Jinxin Gao,Ruidong Xia,Junbiao Peng,Shimelis Admassie Molla
The investigation of fabricating ultra-compact solid-state dye laser (SSDL) using N'N-dimethylformamide (DMF) modified poly(methyl methacrylate) (PMMA) as the polymeric matrix was carried out. Atom transfer radical polymerization (ATRP) was introduced to manipulate the polymerization process of PMMA. By adjusting the additive amount of the Fe III complex (mixture of FeCl 3 and 2,2’-Bipyridyl (bPy)), the polymerization degree of PMMA was coordinated to gain better amplified spontaneous emission (ASE) properties of the embedded laser dye, Lumogen Orange 240 (LO). The ASE threshold of the Fe III complex catalyzed sample decreased as high as ~75%, from 225.3 ± 11.2 μJ cm −2 to 57.2 ± 2.9 μJ cm −2 , comparing to that measured in common PMMA matrix. Additionally, a secondary dye, Stilbene 420 was added in the system for sharing excess excitation energy and oxidization damage, to overcome the photostability problem caused by the oxygen-rich solvent, DMF. The operational lifetime of the resulted sample increased 200%, to the similar level of that without DMF component. Finally, by mechanical polishing and coating a thin film of silver at one end of the PMMA rod, an analogous Fabry-Perot resonator was structured within the rod. Decent laser emission was obtained from the resulted SSDL without complex external cavities.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55699
·
IF 2.7
Xuemei Bai,Jingmin Luan,Tingting Song,Haifeng Sun,Baolin Yan,Yuhua Dai,Jianxiang Yu
Graphitic carbon nitride (g-C 3 N 4 ) has received much attention as a metal-free photocatalyst for dye degradation and sterilization. However, the low photocatalytic bactericidal activity and the difficulty in recycling have limited its applications. Here, oxidatively modified g-C 3 N 4 grafted with polyethyleneimine (PEI) nanofiber membranes (PVA/PEI-OCN) was reported to enhance the photocatalytic activity. The modification by PEI grafting could reduce the recombination rate of photogenerated carriers and lead to more electrons for the photocatalytic reaction. In addition, electron spin resonance (ESR) results showed that the generation of reactive oxygen species (˙OH, ˙O 2 − and 1 O 2 ) were significantly enhanced in photocatalysis, leading to the significant enhancement of photocatalytic bactericidal activity and dye degradation. Furthermore, the PVA/PEI-OCN nanofiber membranes prepared by electrospinning had smooth surfaces and uniform fiber formation, with an average diameter of 380 ± 60 nm. The tensile strength was about 73.5% higher than that of PVA nanofiber membranes. The inhibition diameter of PVA/PEI-OCN-4 against Escherichisa coli ( E. coil ) could reach 20 ± 0.2 mm, and the maximum degradation efficiency of methylene blue solution (10 mg/L) could reach 92.8% within 120 min. This work provided an effective paradigm for the rational design of metal-free photocatalytic materials for elimination of bacterial and dye contamination.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Shi Chengyu,Li Nan,Yuan Qisong,Liu Tao,Cao Qingyuan,Qian Hanqi,Jiang Bo,Wang Jiazhi,Yu Xiangtao
Developing epoxy structural adhesives with excellent high-temperature adhesion remains a great challenge. The incorporation of fillers can enhance the performance of epoxy adhesives, albeit at the expense of reduced high-temperature adhesion properties. Polyhedral oligomeric silsesquioxanes (POSS) is considered a promising filler for enhancing high-temperature adhesion properties due to its excellent compatibility and nano cage-structured. Herein, the rigid cage-structured was covalently introduced epoxy adhesives to improve the high-temperature adhesion properties. The introduction of 1 wt% POSS significantly increased the high-temperature (120°C) adhesion strength by 197% and toughness by 283%. The POSS-reinforced adhesive also featured excellent wide temperature adaptability, indicating that it maintained high adhesion strength at various temperatures. Furthermore, POSS drastically enhanced the transparency of epoxy adhesive by three times. It is highly anticipated that this work will open a new avenue of designing epoxy adhesives with the excellent high-temperature adhesion properties and transparency.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Huijie Qin,Tongwei Zhang,Lihong Bao,Bo Dang,Jianxi Li
Two-dimensional molybdenum disulfide (MoS 2 ) nanosheets are promising nanofillers for improving the properties of polymers, but low-cost, facile and green methods need to be further explored to meet the requirements for large-scale production of modified MoS 2 nanosheets. Here, we developed a new idea that is, to prepare MoS 2 @Ag by modifying the surface of MoS 2 using radiative reduction. It is noteworthy that the modified MoS 2 @Ag can effectively improve the mechanical strength of ethylene-vinyl acetate (EVA) composites. In addition, the addition of MoS 2 @Ag was able to substantially improve the flame-retardant properties of EVA, resulting in a significant reduction in the amount of heat and smoke released from its combustion. When two parts of MoS 2 @Ag were added, the peak heat release rate and total smoke release of EVA/2.0MoS 2 @Ag composites were reduced by 29.7% and 39.2%, respectively, compared with that of pure EVA. At the same time, the toxic gases (e.g., CO) produced by the combustion of EVA composites were significantly reduced, which indicates an improvement in their fire safety.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55502
·
IF 2.7
Haiwen Tang,Yi Li,Ziyi Zhu,Yingqing Zhan,Ying Li,Kui Li,Pan Wang,Fei Zhong,Wei Feng,Xulin Yang
Previous studies on epoxy foams were subjected to the specific property, and improvements in thermal insulation or dielectric property were usually accompanied by the sacrifice of mechanical strength or thermal stability. The current research reported a high-performance epoxy foam by the pre-curing process using E-51/DDS and expandable microsphere (EMP) as polymer matrix and physical blowing agent, respectively. The effect of EMP loading on the structure & property of epoxy foam was reported. The mean diameter of E-51/EMP foam was in the range of 19–21 μm. The compression property of E-51/EMP foam was fit for the power-law model and its integrity was well maintained during compressive test. Compared with bulky epoxy, a significant decrease of thermal conductivity of 62.93% was observed in 10 wt% EMP-filled epoxy foam. E-51/EMP foam showed superior thermal stabilities, with a T 5% of over 300°C. The dielectric constant was decreased by 54.5% from 4.92 in bulky epoxy to 2.24 in E-51/EMP foam (10 wt% EMP). Notably, there was a percolation phenomenon of EMP (6 wt%) regarding on the structure & property of E-51/EMP foam. This study provides lightweight, robust, high-temperature-resistant, and low-dielectric-constant epoxy foams with the wide application prospects in buoyant, electronic packaging, and energy-saving industries.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xinyue Pan,Feiyun Li,Peng Yuan,Yanjun Tang
Enzymatic strengthening and cellulase recovery are effective ways for improving the economy of lignocellulosic hydrolysis. A series of temperature-responsive quaternary ammonium salt type enzymatic hydrolysis promoters (PSDM) were obtained by aqueous-solution free radical polymerization. PSDM dissolved under lignocellulosic enzymatic hydrolysis conditions (50°C). After hydrolysis, it co-precipitated with cellulase when cooling. PSDM had significantly improved hydrolysis and recycling enzyme properties. The efficiency of high-solid substrate enzymatic hydrolysis of corncob residues improved to 1.2 times, and 50% of the cellulase amount was saved when adding 1.5 g/L of PSDM 1 to the system. Hydrophobic binding may be the main driving force for co-precipitation between PSDM and cellulase. In this work, regulation of glucose yield and cellulase consumption were realized by adjusting the ratio of positive and negative charges in PSDM. This work provides a new idea for reducing the cost of technology for this lignocellulosic sugar platform.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Han Gong,Xiangchi Liu,Baijun Liu,Mingyao Zhang
Heavy metal and dye pollution are significant environmental challenges that seriously threaten human health and ecosystem balance. This study introduces a new method for recovering Ag + from wastewater and uses the recovered silver for secondary catalytic applications in dye degradation. Polydopamine functionalized polystyrene mesoporous microspheres (PPS-PDA) were prepared using a green mussel chemical method based on monodisperse polystyrene mesoporous microspheres (PPS) with a diameter of approximately 7 μm. According to the results of Brunauer Emmett Teller Analyzer, the average pore size of PPS-PDA is 17.88 nm, the porosity is 0.53%, and the specific surface area is 54.52 m 2 /g. By observing the scanning electron microscope and energy dispersive spectroscopy, PPS-PDA has an adsorption effect on Ag + in silver ammonia solution and can adsorb up to 40% of silver ammonia solution. The catalytic process was monitored by UV–visible light. The adsorbed Ag-supported polydopamine functionalized polystyrene mesoporous microspheres (PPS-PDA-Ag) showed strong catalytic activity in the process of methylene blue reduction, and the catalytic behavior was consistent with the pseudo-second-order kinetic model. The catalyst maintained an efficiency of 85% in 10 cycles, highlighting its potential in sustainable wastewater treatment.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Qiuyang Huang,Zhuofan Gao,Pengcheng Yan,Zhihui Zhou,Hongdan Wu,Jiazheng Li,Wei Han,Zhuo Huang,Xia Chen,Xian Zhou,Yuan Xiang,Lei Chen,Zeyu Fan,Ziling Peng,Qi Lu,Ji Wu
This study introduces an innovative approach to fabricating a poly ether ketone (PEEK)-based thin-film nanocomposite (TFN) nanofiltration membrane. Ultrafine polydopamine (PDA) modified zeolitic imidazolate framework-8 (ZIF-8) nanoparticles were integrated into the polyamide (PA) layer through a process of interfacial polymerization. The impacts of PDA@ZIF-8 nanoparticle loading on composite membranes were examined, and their separation performances with different solvents and small molecular organics with various molecular weights and charges were evaluated. The PDA modification is credited with inducing a thinner, less crosslinked PA layer, culminating in the formation of a selective barrier that is both loose and ultra-thin, improving the separation capabilities of membranes. The TFN-3 membrane, with a 0.01 wt% loading of PDA@ZIF-8 nanoparticles, emerged as a standout, demonstrating notably enhanced hydrophilicity. The pure water and organic solvent permeances through the TFN-3 membrane were remarkably enhanced, with recorded values of 6.19 ± 0.26 L h −1 m −2 bar −1 for pure water and 3.44 ± 0.21 L h −1 m −2 bar −1 for methanol. Furthermore, the TFN-3 membrane showcased impressive molecular retention in ethanol solutions for compounds with a molecular weight cut-off (MWCO) of 464 g/mol. The PEEK-based TFN-3 membrane also exhibited exceptional creep resistance, ensuring consistent performance during long-term testing. In a 5-day ethanol separation test, the TFN-3 membrane maintained a Rose Bengal (RB) retention rate exceeding 99%, underscoring its stability and reliability. The newly developed PEEK-based TFN membrane not only promises robust solvent resistance and stability but also delivers efficient separation and purification capabilities. It holds great potential for offering effective and sustainable solutions across a spectrum of industries, particularly in pharmaceutical production and chemical processing, where the separation, recovery, and purification of solvents are paramount.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 16
·e55253
·
IF 2.7
Xiaocan Zhang,Siqin Zeng,Jiashu Long,Xuesong Li,Yutong Zhao
Using porous materials to selectively adsorb H 2 O from natural gas is a promising method to dehydrate methane (CH 4 ). The structure of a Zirconium metal-organic framework (Zr-MOF), namely, MIP-202, features a high density of amino groups, which can produce strong hydrogen bonding with H 2 O molecules. MIP-202 is cost-effective, green and scalable, and it exhibits good chemical stability under various conditions. This work incorporated MIP-202 nanoparticles into the high permeability polymer polyetherimide (PEI), and the obtained Mixed Matrix Membranes (MMMs) was used for the gas separation of H 2 O/CH 4 . It is found that MMMs loaded with 20 wt% of MIP-202 demonstrated a high H 2 O/CH 4 selectivity of 832.2, which was about 760 times of that of the pure PEI. This approach offers a new route to fabricate functional membranes for energy-efficient gas separations.
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高影响因子
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