Catalysts
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2022
·Vol. 12
·期 5
·521
·
IF 4.501
M. Abdur Rahaman,Bibimaryam Mousavi,Farah Naz,Francis Verpoort
Here, for the first time, a 2D and leaf-like zeolitic imidazolate framework (ZIF-L) is reported for the synthesis of ultrahigh molecular weight (UHMW) poly(methyl methacrylate) (PMMA) withMnup to 1390 kg mol−1. This synthesis method is a one-step process without any co-catalyst in a solvent-free medium. SEM, PXRD, FT-IR, TGA, and nitrogen sorption measurements confirmed the 2D and leaf-like structure of ZIF-L. The results of PXRD, SEM, TGA demonstrate that the catalyst ZIF-L is remarkably stable even after a long-time polymerization reaction. Zwitterionic Lewis pair polymerization (LPP) has been proposed for the catalytic performance of ZIF-L on methyl methacrylate (MMA) polymerization. This MMA polymerization is consistent with a living system, where ZIF-L could reinitiate the polymerization and propagates the process by gradually growing the polymer chains.Keywords:ultrahigh molecular weight polymer;poly methyl methacrylate;heterogeneous catalyst;zeolitic imidozolate framework
研究领域:
材料科学
·
高分子化学
·
催化
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DOI
高影响因子
Journal of Physical Chemistry Letters
·
2022
·
IF 6.888
Mengyuan Liu,Le Ma,Kehan Xie,Piaopiao Zeng,Shijing Wei,Feng Zhang,Chao Li,Feijiu Wang
Cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) have attracted enormous attention because of their great potential for optoelectronic applications, such as light-emitting diodes (LEDs). However, the photoluminescence and surface ligands of CsPbX3 NCs have a great impact on their device applications. Herein, we report a molecular superacid of bis(trifluoromethane)sulfonimide (TFSI), which could boost the photoluminescence in the metal halide perovskite nanocrystals. In particular, the photoluminescence quantum yield (PLQY) of CsPbI3 nanocrystals could be greatly improved from 28.6% to near 100% with the superacid treatment. The improved PLQY in CsPbX3 nanocrystals is mainly contributed from the surface passivation based on the characterizations. The CsPbX3 nanocrystals were further modified with PMMA, which could greatly improve their stability while preserving high photoluminescence and good dispersion. The use of superacid combined with a polymer for improving the photoluminescence and stability in CsPbX3 provides an alternative strategy for optoelectronics.
研究领域:
材料科学
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纳米技术
·
光电子学
·
化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jiancheng Sun,Chi Zhang,Rubing Zhang
Conventional rigid patch antennas, constrained by high-permittivity substrates ( ε r > 3.0) with severe dielectric loss ( tanδ > 0.02), suffer from catastrophic performance degradation at elevated frequencies (>3 GHz) and inherent inflexibility that fundamentally prohibits their integration in wearable electronics. This work presents a breakthrough in synthesizing PMMA-reinforced polyimide aerogels (PIAs) via a 10-min ambient pressure drying (APD) strategy, enabling tunable porosity (>90%) and ultra-low dielectric constants ( ε r = 1.35, tanδ < 0.01). The incorporation of PMMA into the PI matrix endows the aerogel skeleton with outstanding mechanical resilience (tensile strength of 7.2 MPa and fracture energy of 45.8 kJ/m 2 ), while effectively suppressing capillary-induced shrinkage to below 2.1% during solvent evaporation. The synergistic interplay between PMMA encapsulation and APD-optimized solvent exchange yields a hierarchical nanoporous structure (30 nm average pore size) with exceptional thermal insulation (0.036 W/m·K). When deployed as a substrate for flexible Sub-6 GHz patch antennas, the aerogel exhibits 106% gain enhancement (9.92 dBi) and broad impedance bandwidth (3.862–3.941 GHz), outperforming conventional FR-4 substrates. This work establishes a scalable, low-cost paradigm for multifunctional aerogels in wearable electronics and high-frequency communication systems.
研究领域:
材料科学
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电气工程
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纳米技术
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高分子科学
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通信系统
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柔性电子
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 21
·7211-7220
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IF 7.059
Qinzhao Sun,Jiping Wang,Lixue Zhang,Pu Mao,Shujuan Liu,Liqiang He,Fang Kang,Rong Xue
The choice of dielectric fillers and structure design play an important role in improving the energy storage properties of polymer-based nanocomposites. In this work, a class of sandwich-structured poly(vinylidene fluoride) (PVDF)-based nanocomposites with an insulating layer containing 1D NaNbO3@SiO2 nanowires was prepared using simple casting and hot-pressing methods. 1D NaNbO3 nanowires coated with a SiO2 insulating layer were introduced into the polymer matrix to form a central layer, which has high insulation and low dielectric permittivity. Consequently, the sandwich-structured nanocomposites with 9 vol% 0D BaTiO3 nanoparticles and 1 vol% 1D NaNbO3@SiO2 nanowires exhibit a high discharge energy density of ∼20 J cm−3 at 450 MV m−1 as well as a high discharge efficiency of 75%, indicating a combination of high energy density and high efficiency compared with the systems of all-polymer composites or polymer-based nanocomposites. The dielectric analyses and simulation results indicate that the improved energy storage density and discharge efficiency are attributed to the effect of insulating layers containing 1D NaNbO3@SiO2 nanowires. The findings of this work demonstrate that introducing insulating layers containing 1D nanofillers with high insulation and low permittivity can have a positive effect in improving energy storage performance of dielectric polymer-based nanocomposites.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Jianwei Ji,Qiuyi Lu,Tianyao Liu,Yunlong Hu,Lian-li Zou,Guoguang Xu,Maoxiang Jing
Succinonitrile (SN) electrolyte is emerging as an ideal candidate for solid-state electrolytes due to its high ionic conductivity, wide electrochemical stability window, and low cost. However, severe side reactions with lithium metal and poor mechanical strength have significantly hindered the rapid development of SN-based electrolytes. In this study, an in situ thermal polymerization technique was employed to integrate SN with cross-linked poly(methyl methacrylate) (PMMA), yielding a composite solid electrolyte that combines high ionic conductivity with excellent mechanical properties. The optimized SN-PMMA50 electrolyte achieves a room-temperature ionic conductivity of 2.95 × 10 −4 S cm −1 , an electrochemical stability window of 4.75 V, a lithium-ion transference number of 0.68, and a tensile strength of 165 MPa. Furthermore, the introduction of fluoroethylene carbonate (FEC) as a solid electrolyte interphase (SEI)-forming additive significantly suppresses the side reactions between SN and the lithium anode. The optimized SN-PMMA50-FEC30 composite electrolyte exhibits excellent electrochemical performance and cycling stability. The assembled Li/LiFePO 4 solid-state battery retains 96% capacity after 200 cycles at room temperature. The incorporation of PMMA and FEC markedly enhances the mechanical properties of the electrolyte and the stability of the electrode/electrolyte interface, which provides a highly promising strategy for the application of SN-based polymer electrolytes in lithium metal batteries.
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DOI
高影响因子
POLYMER COMPOSITES
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2026
·
IF 4.9
Zehui Hu,Yong Li,Yue Jin,Chen Liu,Songxue Chen,Yinuo Jiang,Bing Han
To address the issues of uncontrollable fiber volume content and insufficient mechanical properties in vacuum infusion molding for preparing polymethyl methacrylate (PMMA) composites, this study proposes the use of an in situ polymerization combined with hot-pressing cocuring process to fabricate high-performance T700/PMMA composites. By adding PMMA particles to MMA monomers to regulate the viscosity and polymerization activity of the resin system, the optimal mass ratio was determined to be 100:8, with suitable resin viscosity (100–300 mPa s) and the highest polymerization rate. Subsequently, the pultrusion process parameters for prepreg were systematically optimized. Under the conditions of a pulling speed of 0.2 m/min, temperature of 80°C, and tension of 7 N, high-quality prepreg was obtained with a resin content of 34.8%, width of approximately 9 mm, and tensile strength reaching 2778 MPa. Finally, the hot-pressing process for laminates was optimized. By maintaining a temperature of 220°C and pressure of 2 MPa for 20 min, the resulting unidirectional laminate achieved a tensile strength of 1149 MPa and an interlaminar shear strength of 54.72 MPa. This study achieved the controllable preparation of T700/PMMA composite structural properties through comprehensive process optimization, including resin formulation design, prepreg forming, and laminate curing. It provides a complete process solution and experimental basis for the development of high-performance thermoplastic composites. Highlight Propose in situ polymerization for preparing T700/PMMA prepreg. PMMA polymer has the function of regulating resin polymerization reactions. Analyze the yarn spreading mechanism of prepreg. Fabricated high-performance T700/PMMA composite laminate.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Chenxi Zhang,Da Zhang,Kexin Zhou,Yuxuan Xia,Roufen Wu,Jieyuan Zheng,Wen-Jun Wang,Xuan Yang
Reactive lignin-containing CNFs (L-CNFs) unify droplet stabilization and interfacial covalent grafting, enabling the in-situ interfacial anchor-regulated hybrid polymerization. • The one-pot polymerization yields composite particles ready for thermal processing. • 3D-percolated L-CNF networks with chemical interfacial bonding yields L-CNF/PMMA nanocomposites with superior mechanical, optical and thermal properties. Developing strong, transparent, and sustainable biobased poly (methyl methacrylate) (PMMA) nanocomposites is of great significance in the field of high-performance engineering plastics. Here, we report a green and resource-efficient route to PMMA nanocomposites via an in-situ interfacial anchor-regulated hybrid polymerization that extends the role of nanocellulose beyond passive stabilization. Lignin-containing cellulose nanofibrils (L-CNFs), featuring moderate hydrophobicity (water contact angle = 80.6°), high aspect ratio (diameter ~ 1.8 nm, length ~ 1.8 μm), and reactive maleic anhydride groups, stabilize MMA droplets, confine phase separation, and participate in covalent interfacial grafting during polymerization. This droplet-confined hybrid mechanism produces uniformly dispersed PMMA nanoparticles (<300 nm) with high molecular weight (~8.8 × 10 5 Da) and moderate dispersity (PDI = 1.9), independent of initial droplet size. The resulting L-CNF/PMMA films combine high optical clarity (88% transmittance, 5% haze), enhanced stiffness and toughness (Young's modulus +0.8 GPa at 2 wt% L-CNF), and improved thermal stability, while avoiding additional surfactants, crosslinkers, or harsh chemical treatments, demonstrating a step- and resource-efficient, sustainable process. By coupling physical interfacial confinement with chemical anchoring, this work paves a new path to overcome the traditional compatibility barriers between hydrophilic biomass and hydrophobic polymers, offering an adaptable platform for creating transparent and mechanically robust thermoplastic composites. Download: Download high-res image (194KB) Download: Download full-size image
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 21
·11833-11841
·
IF 3.049
Kangquan Zhao,Bin Pi,Liping Zhao,Shoujin Tian,Jianfei Ge,Huilin Yang,Weiping Sha,Liming Wang
The properties of polymethyl methacrylate (PMMA) bone cement make it a popular bone filling material. However, its disadvantages, such as lack of biodegradability and osteogenesis, restrict its clinical application. Studies have indicated the osteogenic properties of N-acetyl cysteine (NAC) and the biodegradability of 2-methylene-1,3-dioxepane/methyl methacrylate-based (MDO/MMA) copolymers. In this study, we developed bioactive PMMA cements through modification with fixed concentrations of NAC and different proportions of MDO. The purpose of this study was to compare the mechanical properties, morphology, NAC release, biocompatibility, degradability and mineralization capability of modified bone cements with those of conventional cement. The specific-modified specimens (NAC-p (5% MDO-co-MMA)) exhibited a lower bending modulus but had little effect on compressive strength. This material was morphologically compact and nonporous, similar to conventional PMMA bone cement. NAC could be released from NAC-p (5% MDO-co-MMA) continuously and appropriately. NAC-p (5% MDO-co-MMA) was biologically safe and showed satisfactory tissue compatibility. Ester was introduced into the polymer, which reinforced the degradation properties of NAC-p (5% MDO-co-MMA). NAC-p (5% MDO-co-MMA) enhanced the mineralization capability of osteoblastic cells.
研究领域:
材料科学
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生物材料
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骨科工程
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2014
·
IF 5.9
Xingwei Ding,Yun Liu,Jinghua Li,Zhong Luo,Yan Hu,Beilu Zhang,Junjie Liu,Jun Zhou,Kaiyong Cai
To develop vehicles for efficient chemotherapeutic cancer therapy, we report a remotely triggered drug delivery system based on magnetic nanocubes. The synthesized magnetic nanocubes with average edge length of around 30 nm acted as cores, whereas poly(methyl methacrylate) (PMMA) was employed as an intermediate coating layer. Hydrazide was then tailored onto PMMA both for doxorubicin (DOX) loading and pH responsive drug delivery via the breakage of hydrazine bonds. The successful fabrication of the pH responsive drug carrier was confirmed by transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and magnetic hysteresis loops, respectively. The carrier was stable at neutral environment and doxorubicin released at pH of 5.0. Cell viability assay and confocal laser scanning microscopy observations demonstrated that the loaded DOX could be efficiently released after cellular endocytosis and induced cancer cells apoptosis thereby. More importantly, the carrier could be guided to the tumor tissue site with an external magnetic field and led to efficient tumor inhibition with low side effects, which were reflected by magnetic resonance imaging (MRI), change of tumor size, TUNEL staining, and H&E staining assays, respectively. All results suggest that hydrazide-tailoring PMMA-coated magnetic nanocube would be a promising pH-responsive drug carrier for remotely targeted cancer therapy in vitro and in vivo.
研究领域:
生物材料学
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药剂学
·
肿瘤学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2018
·Vol. 11
·期 5
·705
·
IF 2.467
Bing Yu,Tingting Xue,Long Pang,Xiulan Zhang,Youqing Shen,Hailin Cong
Monodisperse cross-linked porous poly (methyl methacrylate) (PMMA) microspheres (~2.5 μm in diameter) were prepared by using an improved two-step seed swelling polymerization method with monodisperse micron-grade PMMA microspheres seeds. The porous PMMA microspheres with diverse surface morphology and pore structure were obtained by tuning porogen systems. The monodisperse porous PMMA microspheres, which were prepared using toluene:dibutylphthalate (DBP) = 1:1 (v/v) as a porogen system, had the smallest pore size and the largest specific surface area. Then, the monodisperse porous PMMA microspheres were subjected to high-performance liquid chromatography. The liquid chromatographic column filler successfully realized complete separation of arginine, glycine and glutamic acid, and the separation effect was good. The porous PMMA microspheres provide a new material for the separation of amino acids by liquid chromatography.Keywords:poly (methyl methacrylate), seed swelling polymerization;porous microspheres;high-performance liquid chromatography
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Zhuxian Gao,Zelan Wang,Yuanyuan Li,Caihu Li
Cationic dyes like crystal violet (CV) and methylene blue (MB) pose severe environmental and biological risks, demanding rapid, on-site detection. Conventional colorimetric methods often suffer from high detection limits and poor robustness. Metal-organic frameworks (MOFs) such as ZIF-8 show promise for dye adsorption, but integrating them into processable, transparent matrices for visual sensing remains a challenge, driving the need for advanced hybrid materials. ZIF-8 nanoparticles were synthesized and uniformly embedded within a poly (methylmethacrylate) (PMMA) matrix through a melting mix approach, yielding a transparent composite material. This ZIF-8/PMMA hybrid served as a highly effective visual sensor for the rapid detection of CV and MB in aqueous solutions. A systematic optimization of critical parameters (pH, contact time, temperature, and ionic strength) demonstrated that the sensor has robustness under diverse environmental conditions. Notably, the sensor achieved exceptional visual detection limits of 0.1 mg L −1 (CV at 583 nm) and 0.08 mg L −1 (MB at 664 nm), surpassing conventional colorimetric methods. Density functional theory (DFT) calculations revealed that van der Waals interactions dominated the adsorption mechanism between ZIF-8 and the target dyes. When applied to fish tissue samples, the method exhibited excellent accuracy (recovery rates: 92–107 %) and reproducibility (RSD: 8.9–12.8 %), with a strong linear response (R 2 > 0.99) for both analytes. The selective adsorption performance of ZIF-8 combined with the optical transparency and processability of PMMA provides a groundbreaking environmental protection platform for on-site monitoring of cationic dyes in complex biological matrices.
研究领域:
环境科学
·
材料科学
·
分析化学
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纳米技术
·
传感器与生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yixin Dong,Yansong Liu,Ying Zhang,Junzhan Zhang,Yongsheng Liu
Polymethyl methacrylate (PMMA) microspheres were used as pore-forming agents in the fabrication of porous silicon carbide (SiC) ceramics to control the pore structure and improve their high-temperature performance. PMMA microspheres reduced the viscosity and the overall attenuation coefficient of the SiC slurry, thereby improving its rheological stability and curing depth. As PMMA content increased from 0 to 60 vol%, open porosity rose from 26.27% to 54.98%, while bulk density decreased from 2.21 g/cm 3 to 1.53 g/cm 3 . PMMA decomposition generated uniform micrometer-scale spherical pores in the ceramic matrix. An appropriate open porosity enhanced thermal shock resistance by blunting crack tips and buffering thermal stress, while excessive open porosity caused stress concentration and accelerated crack propagation. The porous SiC ceramics containing 20 vol% PMMA microspheres exhibited the highest thermal shock resistance, with a critical temperature difference ( Δ T c ) of 338.3 °C.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）