ACS Applied Polymer Materials
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2024
·
IF 4.4
Mengyao He,Rui Liu,Xiaoli Li,Gan Zhang,Guanxing Lao,Song Guo,Yuanli Liu
Compared with traditional luminescent materials, nonconventional luminogens have been extensively studied due to their unique properties and wide range of applications. However, the study of nonconventional luminescent polymers is rare because most luminescent polymeric materials can only emit light at high concentrations and require noble metal catalysts for synthesis. Particularly, their application in the field of metal ion detection and biological imaging is still restricted. To expand its application scope, this work designed a series of luminescent polymeric materials only containing carboxyl and amide groups, which were synthesized from poly(methyl vinyl ether maleic anhydride) and 4-(2-aminoethyl)morpholine at different molar ratios (PMVEMA/AML are 1:1, 1:2, and 1:3). The synthesized luminogens exhibited controllable luminescence colors and excellent solubility in various commonly used solvents. Additionally, the polymers can achieve luminescence in dilute solutions, and the maximal luminescence efficiencies can be up to 5.55%. At last, polymer M3 with good biocompatibility and low cytotoxicity can be used to sensitively detect Mg2+ ions in vivo and in vitro. Notably, polymer M3 possesses the ability to target the organelle lysosome in cell imaging.
研究领域:
材料科学
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生物医学工程
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化学
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JOURNAL OF ELASTOMERS AND PLASTICS
·
2026
·
IF 2.4
Weiqiang Song,Junzhuang Li,Xingchu He,Luoru Zuo,Yican Xu,Pengdong Huang,Tengfei Yu,Shuaitao Wang,Peilong Guo,Kebing Wen
In this study, a series of polypropylene (PP)/high-entropy oxide (HEO)/maleic anhydride-grafted polyolefin elastomer (POE-g-MAH) ternary composites was prepared via melt blending, wherein POE-g-MAH was employed as a compatibilizer at loadings ranging from 0 to 5 phr. The microscopic morphology, crystallization behavior, mechanical properties, electrical properties, and insulation performance of the ternary composites were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), dielectric spectroscopy, and volume resistivity measurements. The results revealed an optimal compatibilizer loading at 2 phr, the tensile strength and modulus of the composites reached their peak values of 28.2 ± 3.1 MPa and 481 ± 22 MPa, representing increases of 97% and 39% compared to the 0 phr POE-g-MAH, respectively. Moreover, the degree of crystallinity of PP and the dielectric constant of the composite also reached their maximum values at this loading. The study indicates that the incorporation of POE-g-MAH enhanced the interfacial adhesion between PP and HEO, boosted the interfacial polarization effect, and promoted a better dispersion of HEO in the PP matrix, thereby highlighting its role as a heterogeneous nucleating agent. Furthermore, the impact strength of the composites increased continuously with increasing POE-g-MAH content.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2025
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IF 1.9
Mei Tang,Shunxin Liu,Ping Guo,Zhendi Ma,Xiaorong Hu
As a new class of porous materials, hyper-crosslinked polymers can adsorb heavy metal ions from aqueous solutions. This requires them to possess good surface hydrophilicity and active functional groups that can interact with heavy metals. In this research, three polymers, namely MAH-1, MAH-2, and MAH-3, were synthesized via the Friedel–Crafts alkylation reaction using phenyl maleic anhydride (MAH) as the monomer and dimethoxymethane (FDA), 1,4-p-dichloro-benzyl (DCX), and biphenyl dichlorobenzyl (BCMBP) as cross-linkers, respectively. The effect of the molecular size of the cross-linkers on polymer yields, morphology, and Pb2+ adsorption property was investigated. The yield of MAH-1 was low, and the product was soluble in methanol. This implied that when the cross-linker molecule was short, the steric hindrance caused by the substituents on the monomer benzene ring impeded polymer formation. MAH-2 formed nanoparticles that extended into thin sheets, while MAH-3 only formed nanoparticles, exhibiting clearly different morphologies. After alkalization, the maximum Pb2+ adsorption capacities of the two polymers, determined by the Langmuir adsorption isotherm, were 216 mg g−1 and 134 mg g−1, respectively. Both polymers were applied to treat Pb2+ in simulated battery wastewater with a concentration of 32 mg L−1, and both reduced the concentration to below 0.55 mg L−1, meeting the requirements of the Lead and Zinc Industrial Pollutant Discharge Standard GB 25466-2010 (National Standards of the People’s Republic of China). Additionally, the materials demonstrated good reusability and showed potential for treating lead-contaminated water.
研究领域:
环境科学
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材料科学
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化学工程
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Baoying Liu,Dejian He,Zhenhua Wang,Haoning Li,Xiaomin Fang,Tao Ding,Wenkai Zhang,Zhiwei Li
Glass fiber-reinforced polyamide 6 (PA6/GF) composites are widely used due to their excellent mechanical and thermal properties, but the glass fibers exacerbate flammability via the “candlewick effect”. Conventional flame retardants require high loadings (>15 wt%), which degrade mechanical performance and processing, limiting practical use. Herein, we developed a dual-functional interfacial flame-retardant strategy through incorporating a DOPO-functionalized compatibilizer, poly(DOPO-hydroxyethyl acrylate- co -maleic anhydride) [P(DH-co-MA)]. P(DH-co-MA) covalently bonds to the glass fiber surface via maleic anhydride groups, significantly improving fiber-matrix interfacial adhesion and composite integrity. With a minimal addition of 0.6 wt% P(DH-co-MA) and 10 wt% base flame-retardant system, the modified composites achieve a limiting oxygen index (LOI) of 33.8 %, UL-94 V -0 rating, and a 30.2 % reduction in peak heat release rate (pk-HRR). Moreover, tensile strength, flexural modulus, and impact strength increase by 4.2 %, 5.5 %, and 17.4 %, respectively. Thermogravimetric analysis and char residue characterization indicate that P(DH-co-MA) promotes interfacial char formation and gas-phase radical quenching, exhibiting a dominant gas-phase flame-retardant mechanism. This study offers a viable and efficient route for developing high-performance, interface-engineered flame-retardant polymer composites, achieving simultaneous improvements in mechanical robustness and fire safety at low additive levels. Notably, the DOPO-functionalized compatibilizer can be readily applied for surface-tailored sizing of glass fibers, enabling in situ modification without altering existing processing protocols.
研究领域:
聚合物复合材料
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材料科学
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阻燃技术
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表面改性
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热分析
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FUEL
·
2022
·
IF 8.035
Jianguo Zhuang,Siyan Yan,Peng Zhang,Xinhui Liu,Yitao Zhao,Yijun Yu,Yuchen Wang,Qichao Zhao,Haidan Wu,Xuedong Zhu,Fan Yang
Nickel (Ni) supported on MCM-41 zeolite as hydrogenation catalysts have been widely applied in various reactions, however, the synergism between Ni and the support remains obscure. To prepare more efficient catalysts and reveal the metal-support interaction, MCM-41 zeolite was modified with ammonium hexafluorosilicate (AHFS) before Ni loading. Results show that fluoride ions could selectively convert the vicinal silanols into isolated silanols on MCM-41 surface, which weakens the interactions between Ni precursors and the SiO 2 supports. Over the modified MCM-41 zeolites, the attenuated interaction results in the agglomeration of NiO particles that is more easily to be reduced, rather than the formation of nickel phyllosilicate which is extraordinarily difficult towards reduction. The easily-reduced Ni particles provided more adsorption sites for C C bond instead of C O bond, and the adsorption strength was also regulated. Therefore, the AHFS modified catalyst demonstrated a notable enhancement in hydrogenation of maleic anhydride (MA) into succinic anhydride (SA), presenting 98.4 % MA conversion and 99.8 % SA selectivity at 90 °C under 3.0 MPa H 2 . Moreover, the optimum catalyst was recycled for 5 runs to analyze the deactivation mechanism, it was found out that the loss of activities stems from the leaching of large Ni particles. Overall, our work shed light on the metal-support interactions for Ni/MCM-41 catalyst, determining the vicinal hydroxyl groups were responsible for the state of Ni species, which is helpful for the rational design of other hydrogenation catalysts.
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Foods
·
2023
·Vol. 12
·期 12
·2424
·
IF 5.2
Yang Zhao,Xinrui Li,Shuo Guo,Jingwen Xu,Yan Cui,Mingzhu Zheng,Jingsheng Liu
Xylanases are the preferred enzymes for the extracting of oligosaccharides from wheat bran. However, free xylanases have poor stability and are difficult to reuse, which limit their industrial application. In the present study, we covalently immobilized free maleic anhydride-modified xylanase (FMA-XY) to improve its reusability and stability. The immobilized maleic anhydride-modified xylanase (IMA-XY) exhibited better stability compared with the free enzyme. After six repeated uses, 52.24% of the activity of the immobilized enzyme remained. The wheat bran oligosaccharides extracted using IMA-XY were mainly xylopentoses, xylohexoses, and xyloheptoses, which were the β-configurational units and α-configurational units of xylose. The oligosaccharides also exhibited good antioxidant properties. The results indicated that FMA-XY can easily be recycled and can remain stable after immobilization; therefore, it has good prospects for future industrial applications.Keywords:immobilized enzymes;kinetics;thermodynamics;wheat bran;oligosaccharide
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PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Wei Zhao,Zilu Liu,Song Yang,Na Xu,Xiaokun Li,Gan Luo,Zhenjiang Wu,Shoujun Liu,Chao Yang
An aqueous carbon black slurry was prepared by esterifying polystyrene-maleic anhydride with isobutanol as the esterifying agent and using the esterified product as a dispersant for carbon black. The effects of grinding time and dispersant addition on the ground particle size of carbon black before and after the esterification modification were investigated, as well as the effect of SMA dispersant on the dispersion stability of carbon black. The carbon black slurry was investigated by introducing external conditions such as temperature and pH, and the microscopic dispersion of the ink was observed by SEM. The results showed that the dispersion effect of the isobutanol-modified SMA was stronger than that of the unmodified SMA, the particle size of the carbon black paste reached 84 nm with the best stability when the dispersant was added at 4 % and the grinding time was 120 min. FTIR and XRD results showed that the surface groups of the carbon black interacted with the groups of the dispersant to achieve dispersion stability. This study not only provides directions for the selection of dispersant for carbon black in new aqueous media but also confirms the practicality of black colour pastes in gel inks and provides a theoretical reference for the development of pigment-based gel inks.
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ENERGY & FUELS
·
2021
·
IF 3.605
Ruzhen Cheng,Run Zou,Long He,Lei Liu,Chang Cao,Xinyuan Li,Xuhong Guo,Jun Xu
The precipitation and deposition of asphaltenes often cause great troubles to the recovery and transportation of crude oil. Adding polymer inhibitors is an effective approach to prevent asphaltenes from clogging. In this study, maleic anhydride-co-octadecene copolymers with imidazolyl, phenyl, and pyridyl pendants were synthesized. The inhibition behaviors of two extracted asphaltenes in the presence of these copolymers were investigated, which were also identified by the rheological tests of the heavy crude oil sample. The chemical structure of both asphaltenes was analyzed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), elemental analysis, and time-of-flight (TOF) spectrometry. Both asphaltenes A and B have a high aromaticity and low H/C. However, asphaltene B has a much higher aromaticity and polarity than that of asphaltene A. Ultraviolet–visible spectroscopy, turbidity meter, and dynamic light scattering (DLS) were employed to determine the precipitation behaviors of asphaltenes in the absence and presence of copolymers. The influence of intrinsic properties of asphaltenes, polymer concentration, and aromatic group grafting ratio on asphaltene precipitation were also compared. It is found that the initial precipitation point (IPP) of both asphaltenes is increased most by the copolymer containing 2-aminopyridine (PMO-2-P), while the copolymer containing N-(3-aminopropyl)imidazole (PMO-I) shows the worst inhibition performance. It is because that pyridine group has a stronger adsorption capacity with asphaltene than the imidazole group. The effect of various functional groups in copolymers on inhibiting asphaltene precipitation conforms to the following sequence: 2-aminopyridine > aniline > 4-aminopyridine > N-(3-aminopropyl)imidazole. It is also found that high polymer concentration and grafting ratio are beneficial to inhibit the asphaltene precipitation. As a result of the π–π conjugation and hydrogen-bonding attractions between the aromatic groups in the copolymers and the asphaltenes, the polymers can be stably adsorbed onto the surface of the asphaltenes and prevent their aggregation.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Ganwei Zhang,Xinying Jia,Jiale Xing,Shusu Shen,Xiaoji Zhou,Jingjing Yang,Yongfu Guo,Renbi Bai
Poly(styrene-co-maleic anhydride) (PSMA) and polyethyleneimine (PEI) are used to coat various substrates via a facile and fast process to improve their oil/water separation performances. Substrates including polyvinylidene fluoride (PVDF) microfilter membrane, cotton fabric, nylon mesh, and stainless steel mesh are initially coated with PSMA and subsequently with PEI to yield cross-linked copolymer coatings. The coating procedure can be finished in 30 min. Notably, the copolymer coating can endow the substrate with superhydrophilic and underwater superoleophobic properties, as well as dynamic underwater anti-oil-fouling performance. The successful coating of cross-linked copolymers onto the substrate surface was verified by SEM, ATR-FTIR, and XPS characterization. All of the coated substrates can be used for the separation of the oil/water mixture, and the coated PVDF microfilter membrane offers excellent oil/water emulsion separation performance. More importantly, the coatings can withstand exposure to acidic and basic media as well as repeated and long-term usage.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Bingzheng Jiang,Jiaxin Li,Dong Chen,Li Wang,Wantai Yang
The development and application of high-efficiency coal-water slurry (CWS) dispersants can foster the clean utilization of natural coal. CWS with excellent flowability and stability requires good adsorption capacity of dispersant on pulverized coal surface, which is influenced substantially by the architecture and hydrophilicity of dispersants molecule. In this study, a series of neutralized sulfonated poly(styrene- alt -maleic anhydride) (NSPSM) with different molecular weight (M n ) and sulfonation degree (SD) were synthesized by self-stabilized precipitation polymerization (2SP), gas-solid heterogeneous sulfonation reaction (GSR) and neutralization reaction with NaOH. The performance of NSPSM for CWS, and their dispersion and stabilization mechanisms were investigated in detail. Under optimized conditions, maximum slurry concentration (MSC) and water separation ratio (WSR) of slurry with NSPSM could reach 66.5% and 2.0%, respectively, which are superior to commercial naphthalene sulfonate formaldehyde condensate (NSF) dispersant. The outstanding dispersibility of NSPSM was ascribed to its improved adsorption capacity due to increased charge density along polymer chain, which can prevent agglomeration among coal particles through electrostatic repulsion.
研究领域:
化学工程
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材料科学
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环境科学
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ChemistrySelect
·
2025
·Vol. 10
·期 48
·e03299
·
IF 2
Weikang Zhao,Hailin Zhuang,Ruijie Yang,Yu Wang,Yuanqi Wu,Yuhui Ao,Yu Liu
Polyacrylonitrile copolymers serve as important precursors for the preparation of high-performance carbon fibers (CFs). In this study, maleic anhydride (MAn) was employed to prepare P(AN-MAn-IA) terpolymer by solution polymerization with different feeding ratios of the monomers. The molecular structure, thermal properties, and crystallization properties of the polymers were characterized. Thermal analysis (differential scanning calorimetry [DSC]/thermogravimetric analysis [TGA]) indicates that MAn significantly enhances the stabilization of P(AN-MAn-IA) relative to PAN homopolymer, as evidenced by a reduced initiation temperature, a broader exothermic peak, and decreased activation energy. Rheometric analysis was conducted to investigate the rheological properties of PAN and P(AN-MAn-IA) copolymer solutions, with findings demonstrating that the introduction of MAn leads to an improvement in the spinnability of the solutions. The study verified the potential of P(AN-MAn-IA) as a precursor material for CFs.
研究领域:
材料科学
·
高分子化学
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碳纤维技术
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热分析
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流变学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Lijun Fan,Yanbei Chen,Xianhong Zhang,Wantai Yang
Emulsion polymerization conducted in the presence of polymeric emulsifiers is a new strategy to reduce the possible environmental pollution and product performance degradation caused by small molecular emulsifier residue. However, rare literature has reported on the research field of vinyl chloride (VC). This study constructed a facile and efficient VC emulsion polymerization system by utilizing a modified poly(maleic anhydride-co-vinyl pivalate) (PMVP) copolymer as a polymeric emulsifier. Concretely, PMVP copolymer microspheres are synthesized first via self-stabilized precipitation polymerization (2SP) between maleic anhydride (MAH) and vinyl pivalate (VPi). The effects of key reaction parameters, including solvent composition, monomer feed ratios, reaction temperature, and monomer/initiator dosages on the present 2SP polymerization are investigated systematically. As a result, monodisperse PMVP microspheres with tunable particle sizes (Dn, 800–1300 nm), low number-average molecular weight (Mn ∼ 2300 g/mol), and high yield (>90%) are successfully prepared in the methyl tert-butyl ether/n-hexane (m/m = 3:2) mixture solvent, which is screened as the optimal reaction medium. Subsequently, PMVP microspheres are ammonia-hydrolyzed and further applied as effective polymeric emulsifiers for VC emulsion polymerization. Gratifyingly, poly(vinyl chloride) (PVC) emulsion is synthesized successfully with high monomer conversion. The size of PVC latex can be tuned depending on the emulsifier concentration. More importantly, the final emulsion exhibits outstanding colloidal stability against thermal, mechanical force, freeze–thaw, and Ca2+ ions. In summary, this work has successfully constructed a PVC emulsion polymerization by employing PMVP-based copolymers as functional polymeric emulsifiers, offering a promising platform for emulsion polymerization applications.
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