ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 11
·2008211
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IF 18.808
Fei Li,Sheng Huang,Xinyu Liu,Zelong Bai,Zhiteng Wang,Huidong Xie,Xuedong Bai,Haizheng Zhong
Perovskite quantum dots are emerging as new generation functional materials for display applications. The issue of perovskite “red wall” has been an obstacle for their use in display technology. In this study, the fabrication of γ-Rb x Cs 1– x PbI 3 gradient-alloyed quantum dots in polymeric matrix through a rational designed in situ fabrication process is reported. The formation of γ-Rb x Cs 1– x PbI 3 gradient-alloyed structure can be explained by considering the lattice mismatch and solubility difference between γ-CsPbI 3 and RbPbI 3 . The photoluminescence emission of γ-Rb x Cs 1– x PbI 3 gradient-alloyed quantum dots can be tuned from 675 to 620 nm with full width at half maximum of 31 nm and maximum quantum yields up to 91%. Importantly, the packaged films retained about 95% of its original photoluminescence intensity after 1000 h aging at the test conditions of 60 °C, 90% RH and 40 °C, 90% RH with 3 mW cm −2 , 455 nm blue light irradiation, respectively. By integrating a red and green dual emissive film with blue Mini LEDs, a LCD backlight of a color space of ≈130% of NTSC 1931 standard is achieved with matching rate of 100%.
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高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Bin Yang,Yang Pan,Yangnan Yu,Jinpu Wu,Ru Xia,Shuqin Wang,Yingying Wang,Lifen Su,Jibin Miao,Jiasheng Qian,You Shi,Youlei Tu
In this work, graphene nanoplatelet (GNP) filled polymethyl methacrylate (PMMA) composites were prepared using solution method via a specially designed route and relatively high thermal conductivities of the composites were achieved at a low GNP loading. The effect of GNP content on rheological behavior, thermal and electrical conductivity of the composites was intensively investigated. Thermorheological complexity was displayed at elevated GNP loading, and the rheological percolation threshold of GNP in PMMA decreased from 7.96 wt% at 220 °C to 4.02 wt% at 260 °C according to Winter - Chambon method, suggesting that GNP was more likely to form a seepage network at higher temperature. The DMTA results showed that the increase in moduli of the composites should be ascribed to the formation of the GNP-GNP network structure. The electrical conductivity of the composites underwent a sudden jump by seven orders of magnitude, which also indicated the formation of a GNP conductive pathway in the matrix with an electrical percolation threshold of 2–4 wt%. The results of transient temperature measurement were in good consistent with the thermal conductivity versus GNP loading, which was compared with various thermal conduction models with a modified Agari model presenting an acceptable evaluation of the dispersion status of GNP in the matrix. The experimental electrical and thermal conductivities as a function of GNP content could well be interpreted by the filler network structure as observed in morphological studies.
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高影响因子
MATERIALS & DESIGN
·
2018
·
IF 4.525
Mingliang Pei,Xu Jia,Peng Liu
Theranostic nanomedicines for imaging guided therapy, simultaneously monitoring the real-time response of therapy, have aroused great interest in cancer research. Here, the Janus-like poly(methyl methacrylate)- b -poly(ethylene glycol)-folic acid block -copolymer-grafted fluorescent carbon dots (CDs-PMMA-PEG-FA) were synthesized via surface-initiated atom transfer radical polymerization (SI-ATRP) of methyl methacrylate (MMA) in ethanol with the modified carbon dots (CDs-Br) as initiator, followed by the PEGylation via click chemistry. Interestingly, they could self-assemble into blank nanoassemblies with hydrodynamic diameter of about 150 nm and Doxorubicin (DOX)-loaded nanoassemblies of about 270 nm with high DOX–loading capacity of 67.2%. The DOX-loaded nanoassemblies could release >80% of DOX at pH 5.0 within 36 h, while that at pH 7.4 was only 2%, demonstrating the excellent on-off behavior on pH stimuli. A possible mechanism was proposed to explore the drug release pathway in vitro. Enhanced anti-cancer efficacy of the CDs-PMMA-PEG-FA/DOX nanoassemblies with folate receptor (FR)-mediated targeting function than the free DOX was revealed by the MTT assays, while the bare CDs-PMMA-PEG-FA nanoassemblies possessed good cytocompatibility. The cellular uptake result showed that the proposed fluorescent theranostic nanomedicines could be effectively internalized into HepG2 cells and release DOX into the cell nuclei.
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高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Wei Zhai,Hua-jun Zhu,Long Wang,Xiao-min Liu,Hui Yang
The ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF 4 ) is selected as plasticizer to prepare a series of novel gel polymer electrolytes due to its non-volatility and inflammability. The micro-porous matrix employed in this study is poly(vinylidene fluoride-co-hexafluoropropylene)/poly(methyl methacrylate) (PVDF-HFP/PMMA) membrane synthesized via phase inversion. The effect of the ratio of PVDF-HFP to PMMA on the properties of the micro-porous membrane, such as morphology, porosity and the liquid uptake capability are systematically studied. Thermal and electrochemical properties of the resulting gel polymer electrolyte are also studied with the objective to optimize the quality of the micro-porous gel polymer electrolyte. The results indicate that the micro-porous gel polymer electrolyte MIL-60, derived from the matrix of PMMA-60 (40 wt% PVDF-HFP and 60 wt% of PMMA), presents the lowest glass transition temperature and exhibits the highest ionic conductivity . The LiFePO 4 /MIL-60/Li coin-typed cell cycled at 0.1 C shows the 1 st discharge capacity up to 157 mAh·g −1 , and remains 151 mAh·g −1 on the 50 th cycle.
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高影响因子
Catalysts
·
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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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
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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DOI
高影响因子
Journal of Physical Chemistry Letters
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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
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光电子学
·
化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 21
·7211-7220
·
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
·
能源存储
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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
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
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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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
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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高影响因子
POLYMER COMPOSITES
·
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
危险品化学品经营许可证（带存储）