POLYMER
·
2025
·
IF 4.5
Caishi He,Zhipeng Liu,Jiadong Yang,Zhen Jia,Zebao Rui
In this work, the nano-silica particles grafted maleic anhydride (SiO 2 -g-MAH) was designed to enhance the compatibility of the ethylene-vinyl acetate copolymer/thermoplastic polyurethane (EVA/TPU) immiscible blend system. The silane side chains on SiO 2 -g-MAH can physically entangle with the molecular chains of both EVA and TPU, while the maleic anhydride groups on the surface of SiO 2 -g-MAH can react with TPU to form crosslinking structures. This enables SiO 2 -g-MAH to anchor at the interface, enhances interfacial adhesion and improves significantly the compatibility of the EVA/TPU blends. As a result, the dispersed phase size of the blends significantly decreases, meanwhile, their adhesive and mechanical properties get noticeably improved. When the addition amount of SiO 2 -g-MAH is 2 wt%, the size of the TPU dispersed phase decreases from the original 3.38 ± 0.59 μm to 0.69 ± 0.05 μm, and the lap shear strength and tensile strength of the blend reach respectively 8.76 MPa and 15.51 MPa, representing enhancements of 159.2 % and 45.1 % compared to the EVA/TPU blends without SiO 2 -g-MAH.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Ke Shang,Qingjing Niu,Xiaohui Li,Kongying Zhu,Lixia Ren,Xiaoyan Yuan
Ice formation can cause a serious of cryoinjuries to cells, and development of biocompatible cryoprotectants for ice control is of great importance. Herein, ice-nucleating glycopolymers are synthesized from the alternating copolymer, poly(methyl vinyl ether- alt -maleic anhydride) (PMVEA), by modification with small saccharides via one-step esterification. The prepared water-soluble glycopolymers can trigger ice nucleation at −14 to −12 °C, significantly higher than deionized water, linear poly(vinyl alcohol), and poly(ethylene glycol) (PEG). The structural differences in monosaccharide, disaccharide and trisaccharide-grafted glycopolymers have positive impacts on the chemically induced ice nucleation and the ice crystal morphology, but all of them have weak activities to inhibit ice recrystallization, similar like PEG. Analyses of differential scanning calorimetry and low field nuclear magnetic resonance suggest that the PMVEA-based glycopolymers, which have an alternating structure of hydrophobic methoxyl and hydrophilic carboxyl or saccharide residues, could have strong interactions with water molecules, thus initiating ice nucleation. Particularly, incorporation of trehalose-modified PMVEA in alginate hydrogel can enhance cryosurvival of Lactobacillus rhamnosus after cryopreservation at −20 °C in comparison with cryostorage at −80 °C. This work provides a feasible approach for preparation of ice-nucleating macromolecules for ice control during cryopreservation of cells.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Qu Wang,Qian Li,Kaihao Wang,Tong Wang,Xuehui Liu,Dong Chen,Li Wang,Wantai Yang
Developing advanced strategies that are easy to implement and highly energy-efficient to prepare high-performance polymer foams is of paramount importance for practical applications. Here, we report a method that can transform low-value styrene-maleic anhydride copolymer into high-value polymer foam through a simple and low-energy-consuming process. SMA was prepared via self-stabilized precipitation polymerization (2SP), followed by partial ammonolysis, mechanical foaming, and chemical cross-linking to obtain hydrogel foams. The hydrogel foams were then converted into ultralight and high-performance polymer foams using low-energy ambient pressure drying and imidization at 180 °C. The obtained polymer foams have ultralow density (0.028 ± 0.003–0.049 ± 0.004 g/cm3), high porosity (93.38–95.28%), low thermal conductivity (0.030 ± 0.001–0.034 ± 0.002 W/m K), excellent cyclic compressibility, and strong oil absorption capacity (up to 20.3 ± 1.0 g/g). Owing to the simplicity and efficiency of the present strategy, as well as the structural diversity and superior performance of maleic anhydride copolymer-based foams, widespread application in diverse fields such as building insulation materials can be expected.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jiayi Xin,Jiawen Hu,Bo Zheng,Changwen Zhao,Dong Chen,Wantai Yang
Blends of poly(butylene adipate-co-terephthalate) (PBAT) and poly(lactic acid) (PLA) attract intensive interest as biodegradable alternatives to conventional plastics. However, the intrinsic incompatibility between PBAT and PLA limits their practical applications. To address this limitation, poly(dicyclopentadiene-co-maleic anhydride) (PDM) was synthesized via self-stabilized precipitation polymerization and used as a compatibilizer. The effects of PDM on the mechanical properties, biodegradation behavior, and phytotoxicity of the PBAT–PLA blends were systematically investigated. The results demonstrated that PDM chemically interacted with both PBAT and PLA, enhancing the interfacial compatibility and mechanical performance. At 2.5 phr of PDM, the blend with optimal mechanical properties was achieved with tensile strength increasing from 23.0 to 31.2 MPa. Biodegradation experiments revealed that PDM improved structural stability and slowed degradation, and the cumulative CO2 release for PBAT–PDM-PLA was 11.02% lower than pristine PBAT–PLA. Furthermore, PDM exerted negligible effects on soybean seedling growth within the experimental period.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Qu Wang,Bingzheng Jiang,Dong Chen,Li Wang,Wantai Yang
The petrochemical industry produces many intermediate products rich in mixed olefinic fractions, which call for more efficient utilization. Herein, the self-stabilized precipitation polymerization was used to copolymerize C5 mixed olefins contained in light naphtha with maleic anhydride, giving light naphatha-based maleic anhydride copolymer PLNM. PLNM was grafted with fatty alcohols of different chain lengths by esterification reaction and subjected to amidation reaction with amino-terminated polyoxypropylene D230 to construct a 3D cross-linking network for shape-stabilized phase change materials (SSPCMs). The esterification kinetics were investigated in detail, which enabled the preparation of a series of fatty alcohol-modified PLNM (FMPLNM) bearing good compatibility with corresponding fatty alcohols above a critical esterification degree. The shape stability, thermal storage performance, cyclic stability, and thermal management performance of the light naphtha-based SSPCMs were assessed systematically. Thus, we have developed an efficient approach to converting “waste” olefins in light naphtha into high-value-added SSPCMs with good shape stability, high enthalpy efficiency, and outstanding thermal management performance.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Yaping Li,Wangyan Nie,Pengpeng Chen,Yifeng Zhou
Sulfonated poly(styrene-alt-maleic anhydride) (SSMA) microspheres were prepared from poly(styrene-alt-maleic anhydride) (SMA) by sulfonation reaction and its adsorption behavior as an efficient adsorbent for the removal of organic dyes was systematically studied. The structure and morphology of SMA and SSMA were characterized by 13 C NMR, FTIR, EDS, XPS, SEM and TEM. The adsorption performance of SMA and SSMA toward organic dyes was investigated by batch mode adsorption experiments. Results indicated that the SSMA had much more adsorbability for cationic dyes such as methylene blue (MB) and Rhodamine B (RhB) compared to SMA. The adsorption capacity for MB of SSMA 8h which had been sulfonated 8 h was found to be 671.14 mg/g, while the adsorption capacity of SMA for MB was 344.83 mg/g at 25 °C, showing that the adsorption capacity for cationic dyes was enhanced 94.63% via the sulfonation. The kinetic studies revealed that the sorption followed a pseudo-second-order kinetic model which indicated that the adsorption interaction between adsorbent and adsorbate molecules was chemisorption. Moreover, adsorption isotherm mechanisms were analyzed by Freundlich and Langmuir models.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Dongdong Kang,Huiju Shao,Guijing Chen,Xiaoliang Dong,Shuhao Qin
Amphiphilic copolymers have increasingly attracted researchers’ attention to produce the hydrophilic and antifouling polymeric membranes. However, few studies has been reported on systematic manipulation of matrix miscibility to control the membrane microstructure during the nonsolvent induced phase separation (NIPS). Herein, a facile method is brought forward to investigate the effects of miscibility on the structure and performance of the membranes. Through the transformation of styrene-maleic anhydride copolymer (SMA) into sodium styrene-maleic anhydride copolymer (SMANa), a homogeneous and transparent dope solution was successfully prepared. Next, the crescent pores and spherical particles in the PVDF/SMA membrane were eliminated to achieve the uniformly porous PVDF/SMANa membranes by the exchange of nonsolvent and solvent components. Importantly, SMANa could segregate at the external surface and internal pore walls as SMA to enhance the hydrophilicity and antifouling properties of the membranes. Subsequently, by optimizing the dope solution composition and coagulation bath temperature, PVDF/SMANa ultrafiltration membranes exhibited the pure water flux of 1014 L/m 2 h and the rejection to BSA of 98.9%. These results outperformed previously reported ones for similar PVDF composite membranes. Significantly, this strategy can be applied to the large-scale manufacture of membranes.
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MOLECULES
·
2024
·Vol. 29
·期 8
·1887
·
IF 4.2
Yao Xu,Qinwen Wang,Yuanbo Wang,Falu Hu,Bin Sun,Tingting Gao,Guowei Zhou
Wastewater containing organic dyes has become one of the important challenges in water treatment due to its high salt content and resistance to natural degradation. In this work, a novelty adsorbent, PEI-SMA, was prepared by grafting polyethyleneimine (PEI) onto styrene-maleic anhydride copolymer (SMA) through an amidation reaction. The various factors, such as pH, adsorbent dosage, contact time, dye concentration, and temperature, which may affect the adsorption of PEI-SMA for Reactive Black 5 (RB5), were systematically investigated by static adsorption experiments. The adsorption process of PEI-SMA for RB5 was more consistent with the Langmuir isotherm model and the pseudo-second-order model, suggesting a single-layer chemisorption. PEI-SMA exhibits excellent adsorption performance for RB5 dye, with a maximum adsorption capacity of 1749.19 mg g–1at pH = 2. Additionally, PEI-SMA exhibited highly efficient RB5 competitive adsorption against coexisting Cl−and SO42−ions and cationic dyes. The adsorption mechanism was explored, and it can be explained as the synergistic effect of electrostatic interaction, hydrogen bonding and π–π interaction. This study demonstrates that PEI-SMA could act as a high performance and promising candidate for the effective adsorption of anionic dyes from aqueous solutions.
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LANGMUIR
·
2025
·
IF 3.9
Kaihui Pan,Zexin Zhang,Yang Liu,Yihao Wang,Li Wang,Wantai Yang
In this study, poly(ethylene-alt-maleic anhydride) (PEMA) was selected as the backbone, and PEMA-g-DA/DMAPA was synthesized through an amidation reaction with dopamine (DA) and N,N-dimethylaminopropylamine (DMAPA). The antifogging performance, stability, universality, and antibacterial property after quaternization of the PEMA-DA-DMAPA coating were tested and analyzed. Experimental results showed that the PEMA-DA-DMAPA coating exhibited great antifogging performance, with the water contact angle (WCA) as low as 10.7°. The coefficient of friction of the PEMA-DA-DMAPA coating decreased significantly compared with that of the substrate. Even after 5 days of immersion or 60 cycling tests, the coating still maintained excellent antifogging properties. This coating can be widely applied to the surfaces of transparent substrates, such as poly(methyl methacrylate)(PMMA), polyethylene terephthalate (PET), and polycarbonate (PC). Specifically, the WCA on the PC surface dropped significantly from 89.5° to 11.9°. After quaternization, the coating exhibited notable antibacterial activity against Staphylococcus aureus (S. aureus), with a maximum antibacterial rate of 97.23%.
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PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 3
·1-12
·
IF 1.92
Zhu Yeling,Liang Changsheng,Bo Yang,Xu Shiai
Bi-functional co-agent, diallyl phthalate (DAP), −assisted melting free-radical grafting of maleic anhydride (MAH) on polypropylene (PP) is carried out by reactive extrusion. The PP/recycled polyethylene terephthalate (rPET) blends with and without PP-g-MAH/DAP (PP grafted with both MAH and DAP) are conducted on a twin-screw extruder. It reveals that the introduction of DAP can significantly enhance the grafting degree of MAH and decrease the chain scission of PP. The maximum extent of MAH grafting (1.5 wt.%) is obtained when DCP and MAH contents are 0.5 and 6.0 wt.%, respectively, and the DAP/MAH molar ratio is 0.3. Besides, differential scanning calorimetry (DSC) analysis shows that the crystallization temperature of grafted PP is higher than that of pure PP due to the nucleation of grafted groups. Fourier transform infrared spectroscopy (FTIR) analysis proves that chemical reactions take place between PP-g-MAH/DAP and rPET. In particular, scanning electron microscopy (SEM) observations demonstrate that, the PP/rPET blends compatibilized with PP-g-MAH/DAP show enhanced adhesion at the interface comparing with the binary PP/rPET blend, which is also proved by DSC measurements, dynamic mechanical analysis (DMA) and mechanical properties.
研究领域:
高分子科学
·
材料工程
·
塑料回收
·
反应性相容化
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Ping Wang,Meijuan Xue,Xinhui Guan,Xiaofei Gu,Xiaoqiang Qiao
Background Phospholipids in serum exosomes are promising biomarkers for breast cancer diagnosis. However, the separation of phospholipids by liquid chromatography presents several challenges due to their inherent structural heterogeneity and the presence of isomeric forms. Traditional columns often struggle with the overlapping retention times of phospholipid species, which can result in poor resolution and difficulty in accurate quantification. Furthermore, the varying polarities and hydrophobicities of different phospholipid classes necessitate specialized stationary phases to achieve optimal separation. This study aimed to develop a novel chromatographic material for the comprehensive analysis of phospholipids in complex biological matrices. Results In this study, a novel silica-based Sil-SMA-GMS copolymer brush stationary phase was fabricated for the first time via reversible addition-fragmentation chain transfer (RAFT) polymerization, using styrene-maleic anhydride (SMA) copolymer as the functional matrix and glycerol monostearate (GMS) as the derivatization reagent. Benefiting from the synergistic effects of hydrophobic moieties (benzene rings and long alkyl chains) and hydrophilic groups (carboxyl and hydroxyl groups) in the SMA copolymer, the prepared stationary phase exhibited a unique mixed hydrophilic interaction chromatography/reversed-phase liquid chromatography (HILIC/RPLC) retention mechanism. It demonstrated excellent separation selectivity and stability for both hydrophilic and hydrophobic small molecules, achieving a maximum column efficiency of 81,029 N/m. Notably, this stationary phase overcame the limitations of traditional single-mode chromatographic columns, enabling the simultaneous separation and analysis of phospholipids that vary in class, acyl chain length, and degree of unsaturation. Furthermore, by coupling the Sil-SMA-GMS column with mass spectrometry (MS), a non-targeted analytical method for serum exosomal phospholipids was developed. Applying this method to serum exosomes from breast cancer patients and healthy controls led to the identification of 9 major classes encompassing 200 phospholipid molecular subtypes, as well as the screening of phospholipid markers closely associated with breast cancer pathogenesis. Significance This work presents a novel chromatographic material for the efficient separation of phospholipids in complex biological samples and establishes a technical foundation for the construction of multidimensional lipidomics platform. This advancement provides crucial support for the screening of cancer-related biomarkers, elucidating tumor metabolic mechanisms, and exploring targeted therapeutic targets.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 43
·期 4
·2175-2183
·
IF 3.531
Lu Cheng,Wenfeng Liu,Ziqi Zhang,Yongcun Zhou,Shengtao Li
To simoutinusly achieve improved breakdown strength (BDS) and suppressed dielectric loss, a modified ternary nanocomposite composed of polypropylene (PP), maleic anhydride-grafted PP and core-shell structure SiO 2 @ZrO 2 nanoparticles is proposed. By tailoring the thickness of SiO 2 shell from 3 to 11 nm and the nanofillers content from 0.5 to 5 wt%, the particles disparsion is improved and meanwhile both the deep trap density and the interaction force between molecules are enhanced. In consequence, the restricted transportation of electrons along molecule chains as well as between chains together raise the DC BDS, that the BDS of optimum sample film reaches 430.8 kV/mm, 23% higher than neat PP. Besides, the ternary nanocomposites with SiO 2 @ZrO 2 less than 3 wt% maintain the tanδ below 0.3% at a broad frequency ranging from 0.1 Hz to 100 kHz, which is an extremely low level same as neat PP.
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危险品化学品经营许可证（带存储）