JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Chengliang Wang,Xia Guo,Jinbian Lv,Yin Zhang,Haitao Li,Jie Gao,Wei Wei,Di Zhang,Yongxiang Zhao
The primary products of the direct hydrogenation of Maleic Anhydride (MA) are Succinic Anhydride (SAH) and γ-butyrolactone (GBL). Achieving selective synthesis of these products by regulating the composition, structure, and textural properties remains a focal point in the research field of maleic anhydride hydrogenation. Based on the characteristic of atomic level uniform distribution of cations of layered double hydroxides (LDHs), a highly loaded, highly dispersed and homogenized NiCu alloy bimetallic catalyst was synthesized using NiCuAl-LDHs as precursor. Compared with Ni/Al 2 O 3 catalyst derived from NiAl-LDHs, the introduction of Cu can effectively improve the hydrogenation activity of C=C bonds while inhibiting the hydrogenolysis of C=O bonds. Under identical reaction conditions, the primary product of the Ni/Al 2 O 3 catalyst was γ-butyrolactone (GBL) with a yield of 94.2 %, whereas the primary product of the NiCu 0.4 /Al 2 O 3 catalyst was Succinic Anhydride (SAH) with a yield of 90.5 %. The introduction of Cu resulted in the formation of a homogeneous NiCu alloy phase in the catalyst, which significantly influenced the adsorption configurations and adsorption energies of the reactants and intermediates. This effect can be attributed to the electronic interactions between Ni and Cu, which shift the d-band center of Ni away from the Fermi energy level, thereby facilitating the directed synthesis of Succinic Anhydride (SAH) and γ-butyrolactone (GBL). These findings were confirmed by various characterization techniques and DFT theoretical calculations. Future catalyst development in maleic anhydride hydrogenation will significantly benefit from the design approach and research ideas presented in this study.
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高影响因子
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.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Bin Sun,Fengfei Chen,Hualin Lin,Yuan Xue,Sheng Han
The poor cold flow properties (CFPs) are the main factors that hinder the utilization and popularization of diesel fuel. Cold flow improvers (CFIs) are usually add to diesel fuel to compensate for liquidity problems at low temperatures. In this study, monomers with different functional groups were used to synthesize methyl benzyl acrylate-co-hexadecene-maleic anhydride (MB-HD-MA) terpolymers with different mole ratios through free radical polymerization , and then the terpolymers were modified with tetradecanol to obtain comb type terpolymers (MB-HD-MA-C14). The structure of MB-HD-MA and MB-HD-MA-C14 were characterized by Fourier transform infrared spectroscopy (FTIR) and Nuclear Magnetic Resonance Hydrogen spectra (1 H NMR). Adding CFIs to diesel fuel effectively improved the CFPs, 1000 ppm MB-HD-MA-C14 (3:1:4) presented the best depression effects on cold filter plugging point (CFPP) and solid point (SP) by 12 °C and 21 °C, respectively. The results showed that the non-polar and polar components in CFIs exert synergistic effect at an optimal ratio to improve CFPs with greater efficiency. Moreover, rheology analysis and polarizing optical microscopy showed that MB-HD-MA-C14 (3:1:4) can improve the rheological properties by reducing dynamic viscosity and improve the crystallization behavior of wax crystals at low temperature by decreasing the size and modifying the morphology of the wax crystals.
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POLYMER DEGRADATION AND STABILITY
·
2016
·
IF 3.12
Mei Wang,Jianling Xia,Jianchun Jiang,Shouhai Li,Kun Huang,Wei Mao,Mei Li
A novel liquid Ca/Zn thermal stabilizer was synthesized from tung-maleic anhydride (TMA) as feedstock and evaluated for its stabilizing effects on poly (vinyl chloride) (PVC). First, N -(3-amino-benzoic acid) tung-maleamic acid (ABTMA) was prepared from the ammonolysis of TMA and para -aminobenzoic acid (PABA). Then its complex calcium salt (ABTMA-Ca) and zinc salt (ABTMA-Zn) were synthesized through a one-step method, and investigated by Fourier transform infrared spectroscopy and elemental analysis . ABTMA-Ca and ABTMA-Zn were separately treated with diethylene glycol monobutyl ether at 120 °C for 3 h to form liquid ABTMA-Ca (LABTMA-Ca) and liquid ABTMA-Zn (LABTMA-Zn). The effects of LABTMA-Ca/LABTMA-Zn, CaSt 2 /ZnSt 2 and C36DA-Ca/C36DA-Zn on thermal stability of PVC were studied through Congo Red test, discoloration tests and dynamic thermal stability analysis. The LABTMA-Ca/LABTMA-Zn thermal stabilizer exhibit excellent long-term stability. Analysis of tensile and dynamic mechanical properties shows PVC samples stabilized with LABTMA-Ca/LABTMA-Zn and the other two Ca/Zn systems all display comparable strength , modulus and glass transition. A common stabilizing mechanism of LABTMA-Ca/LABTMA-Zn system and its radical mechanism were presented, respectively.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 7
·5615-5622
·
IF 1.798
Chu Yang,Hao Haixia,Xie Hongde,Chen Cuili,Cai Peiqing,Seo Hyo Jin
In this work, we report the preparation of lanthanide (Eu 3+ , Tb 3+ )-complex-grafted copolymer of methyl methacrylate and maleic anhydride films. The lanthanide complex with three amino groups was used to react with poly(methyl methacrylate-co-maleic anhydride) (P(MMA-MAH)) via the amidation method. Fourier transform infrared (FT-IR), Transmission electron microscope (TEM), Scanning electron microscope (SEM), Thermogravimetric analysis (TGA) were employed to characterize those polymers. Luminescent properties were evaluated through conducting Photoluminescence (PL) excitation spectra, emission spectra and fluorescence decay curves measurements. The infrared analysis reveals the amidation between amino groups and anhydride rings. The comparatively uniform morphology can be observed in the images of TEM and SEM. These polymers can emit intense characteristic lights including red light from Eu 3+ ions and green light from Tb 3+ ions under 294 nm excitation. The lifetimes of polymers are short (about 1 ms). Meanwhile, these luminescent polymers exhibit high thermal stability (T 5 > 200 °C). We also stimulate a lamp to illustrate the possible application. All these approved interesting results suggest that they hold significant promising applications as luminous layers for optoelectronic devices.
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Journal of Biomedical Nanotechnology
·
2023
·Vol. 19
·期 5
·739-746
·
IF 2.9
Wu Hongzi,Zhang Dehua,Wang Jian,Li Yongqi,Mao Feng,Liao Yi
This work explored the biocompatibility and In Vitro osteogenic differentiation ability of new degradable polymer scaffold to provide some references for the research focusing on applying the scaffold for osseous tissue engineering. Polyglycerolsebacate-maleic anhydride (PGS-M)
and Nano-hyproxyapatite (n-HA) were utilized to prepare a new scaffold, which was called PGS-M/n-HA herein. Besides, scanning electron microscope (SEM) was employed to observe the morphology and porosity of the PGS-M/n-HA, and its In Vitro degradation rate and mechanical property (MP)
were analyzed. Human bone marrow mesenchymal stem cells (HBMSCs) (Ctrl group), osteoblast inducing conditional media (OICM group), PGS-M/n-HA group, and PGS-M/n-HA combining with OICM (OICM+PGS-M/n-HA group) were cultured. After that, the differences in cell adhesion rate, viability, and alkaline
phosphatase (AKP) activity were compared and analyzed. It was demonstrated that porosities of PGS-M and PGS-M/n-HA declined while the constrained modulus increased. Based on those in the Ctrl group, the cell viability and AKP activity in the OICM group were enhanced. In contrast to those in
PGS-M/n-HA group, cell adhesion rate and AKP activity were both enhanced in the OICM+PGS-M/n-HA group. Therefore, it suggested that PGS-M/n-HA scaffold possessed high degradability, MP, and biocompatibility, and could induce the differentiation of HBMSCs into osteoblasts.
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SOLID STATE IONICS
·
2018
·
IF 2.751
Minsui Li,Youhao Liao,Qiuyu Liu,Jiaxin Xu,Fangbin Chen,Jinhong Huang,Weishan Li
To compensate the disadvantage of traditional poly(vinylidene fluoride- co -hexafluoropropylene) (P(VdF-HFP)) based gel polymer electrolyte (GPE) with poor rate performance, new GPE system consisted of P(VdF-HFP) and poly(methyl vinyl ether- alt -maleic anhydride) (P(MVE-MA)) with different ratios were prepared by electrospinning technology using polyethylene (PE) as support. After introducing P(MVE-MA) into P(VdF-HFP) system, the performance of the blended membrane and the GPE was significantly improved. Especially M4 based GPE blended with the mass ratios of P(MVE-MA): P(VdF-HFP) = 75: 25 exhibited the best physical and electrochemical characterizations. The developed membranes with interconnected fibrous structure showed the average diameter of 0.1–2.0 μm, which were facilitated for uptaking the liquid electrolyte and improving the ionic conductivity for corresponding GPEs. The introduced P(MVE-MA) copolymer presented higher decomposition voltage than P(VdF-HFP) copolymer from the calculation result of oxidation potential, leading to higher oxidative stability for blended GPE than pure P(VdF-HFP) based GPE. Furthermore, M4 based GPE presented remarkable interfacial compatibility with electrode and the lower polarization resistance , resulting in better cycling stability and rate performance, which had 96.5% capacity retention after 100 cycles and the discharge capacity at 5 C kept 91.6% of 1 C capacity in Li/GPE/LiNi 0.5 Mn 1.5 O 4 coin cell, compared with P(VdF-HFP) based GPE that had 87.8% retained capacity after 100 cycles and 48.7% retention capacity at 5 C .
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Liu Yang,Yingxue Wu,Hongyi Shu,Chuang Wang,Changetong Song,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Polymer-supported catalysts have attracted intensive research attentions due to easy handling, facile separation and outstanding recycling performance. Herein, a simple, efficient and universal strategy was developed to fabricate isocyanate-functionalized polymer microspheres bearing highly reactive surface isocyanate groups, which could serve as a versatile support for the immobilization of photocatalyst. Firstly, self-stabilized precipitation polymerization of maleimide, maleic anhydride and styrene was performed in the presence of divinyl benzene (crosslinker) to prepare imide-functionalized poly(styrene- co -maleimide- co -maleic anhydride) (PSMM) microspheres. By simply adjusting the solvent composition and monomer feed ratio, monodisperse PSMM particles with diameter in the range of 0.52–1.01 μm were successfully obtained, which were further modified with hexamethylene diisocyanate (HDI). As a proof-of-concept, TiO 2 nanoparticles were readily and covalently bound to the surface of HDI-functionalized PSMM (PSMM-HDI) particles through reaction with isocyanate groups, leading to the formation of PSMM-HDI supported TiO 2 (PSMM-HDI@TiO 2 ). Furthermore, anhydride groups on the surface of PSMM was hydrolyzed to endow PSMM-HDI@TiO 2 with better dispersibility and adsorption performance. The degradation of methylene blue under UV-light was performed to evaluate the photocatalytic performance of the resultant PSMM-HDI@TiO 2 . Compared with pristine TiO 2 , the PSMM-HDI@TiO 2 exhibited not only higher degradation efficiency, but also facile separation and better reusability.
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MOLECULES
·
2023
·Vol. 28
·期 12
·4830
·
IF 4.6
Xiaorui Yang,Xiaotong Li,Jing Zhao,Jinhua Liang,Jianliang Zhu
Sorbitol, a product primarily derived from glucose hydrogenation, has extensive applications in the pharmaceutical, chemical and other industries. Amino styrene-co-maleic anhydride polymer encapsulated on activated carbon (Ru/ASMA@AC) catalysts were developed for efficient glucose hydrogenation and were prepared and confined Ru by coordination with styrene-co-maleic anhydride polymer (ASMA). Through single-factor experiments, optimal conditions were determined to be 2.5 wt.% ruthenium loading and a catalyst usage of 1.5 g, 20% glucose solution at 130 °C, reaction pressure of 4.0 MPa, and a stirring speed of 600 rpm for 3 h. These conditions achieved a high glucose conversion rate of 99.68% and a sorbitol selectivity of 93.04%. Reaction kinetics testing proved that the hydrogenation of glucose catalyzed by Ru/ASMA@AC was a first-order reaction, with a reaction activation energy of 73.04 kJ/mol. Furthermore, the catalytic performance of the Ru/ASMA@AC and Ru/AC catalysts for glucose hydrogenation were compared and characterized by various detection methods. The Ru/ASMA@AC catalyst exhibited excellent stability after five cycles, whereas the traditional Ru/AC catalyst suffered from a 10% decrease in sorbitol yield after three cycles. These results suggest that the Ru/ASMA@AC catalyst is a more promising candidate for high-concentration glucose hydrogenation due to its high catalytic performance and superior stability.Keywords:Ru/ASMA@AC catalyst;coordination;glucose conversion;sorbitol yield;confine
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高影响因子
Polymers
·
2019
·Vol. 11
·期 5
·881
·
IF 3.164
Lijun Gao,Xianggen Chen,Xiangjun Liang,Xiuzhi Guo,Xianling Huang,Caifen Chen,Xiaodan Wan,Ruyu Deng,Qifeng Wu,Lingyun Wang,Jiuying Feng
The thermoplastic poly(propylene carbonate) (PPC) containing cross-linked networks was one-pot synthesized by copolymerization of carbon dioxide, propylene oxide (PO), maleic anhydride (MA), and furfuryl glycidyl ether (FGE). The copolymers were characterized by Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) measurements. The thermal and dimensional stability of the copolymers were improved. When the MA and FGE load increased from 1 mol% to 4 mol% of PO, the copolymers contained the gel contents of 11.0%–26.1% and their yields were about double that of the PPC. The 5% weight-loss degradation temperatures (Td,-5%) and the maximum weight-loss degradation temperatures (Td,max) increased from 149.7–271.3 °C and from 282.6–288.6 °C, respectively, corresponding to 217.1 °C and 239.0 °C of PPC. Additionally, the hot-set elongation tests showed that the copolymers exhibited elasticity and dimensional stability with the minimum permanent deformation of 6.5% which was far less than that of PPC of 157.2%, while the tensile strengths were a little lower than that of PPC because of the following two conflicting factors, cross-links and flexibility of the units formed by the introduced third monomers, MA and FGE. In brief, we provide a novel method of one-pot synthesis of PPC containing cross-linked networks. According to this idea, the properties would be more extensively regulated by changing the cross-linkable monomers.Keywords:poly(propylene carbonate);networks;copolymerization;modification
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Guan Xinhui,Zhang Yuying,Ma Xiaoqiao,Wang Haiyan,Qiao Xiaoqiang,Gu Xiaofei
Comprehensive characterization of exosomal phospholipids is essential for understanding cancer-associated metabolic alterations and discovering potential biomarkers, but remains challenging due to their extensive structural diversity and the limited selectivity and coverage of conventional liquid chromatography-tandem mass spectrometry (LC-MS/MS) approaches. In this study, an ionic liquid-functionalized styrene-maleic anhydride copolymer brush stationary phase (Sil-BHHICl) was developed and integrated into an offline two-dimensional (2D) LC-MS/MS platform for comprehensive exosomal phospholipid profiling. The Sil-BHHICl stationary phase exhibited a hydrophilic interaction/reversed-phase mixed-mode retention mechanism and provided enhanced selectivity toward phospholipids, enabling efficient separation at both the phospholipid-class and molecular-species levels. The developed analytical platform enabled comprehensive profiling of plasma-derived exosomal phospholipids, resulting in the identification of 274 molecular species belonging to 10 phospholipid classes. Lipidomic analysis of plasma exosomes from breast cancer patients and healthy controls revealed distinct phospholipid alterations associated with breast cancer and identified five candidate biomarkers, among which LysoPC-O (16:0) exhibited the strongest discriminatory ability. Pathway enrichment analysis further indicated that the altered phospholipids were predominantly associated with glycerophospholipid metabolism, suggesting extensive lipid metabolic remodeling in breast cancer. Overall, this study establishes a mixed-mode chromatographic platform for high-coverage exosomal phospholipid profiling and demonstrates its potential for lipidomics-based biomarker discovery and investigation of disease-associated metabolic alterations. Graphical abstract
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Gels
·
2022
·Vol. 8
·期 5
·322
·
IF 4.432
Zhichuan Tang,Zhengsong Qiu,Hanyi Zhong,Hui Mao,Kai Shan,Yujie Kang
Filtration loss control under high-temperature conditions is a worldwide issue among water-based drilling fluids (WBDFs). A core–shell high-temperature filter reducer (PAASM-CaCO3) that combines organic macromolecules with inorganic nanomaterials was developed by combining acrylamide (AM), 2-acrylamide-2-methylpropane sulfonic acid (AMPS), styrene (St), and maleic anhydride (MA) as monomers and nano-calcium carbonate (NCC). The molecular structure of PAASM-CaCO3was characterized. The average molecular weight of the organic part was 6.98 × 105and the thermal decomposition temperature was about 300 °C. PAASM-CaCO3had a better high-temperature resistance. The rheological properties and filtration performance of drilling fluids treated with PAASM-CaCO3were stable before and after aging at 200 °C/16 h, and the effect of filtration control was better than that of commonly used filter reducers. PAASM-CaCO3improved colloidal stability and mud cake quality at high temperatures.Keywords:filtration reducer;high temperature;water-based drilling fluid;nanomaterials;calcium carbonate
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高影响因子
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