POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 1
·e6290
·
IF 3.1
Chunlei Dong,Xuanzhi Mao,Minglei Wang,Maojiang Zhang,Jianbing Chen,Jiangtao Hu,Guozhong Wu
Heat-resistant, highly surface-hardened, and transparent composites of poly(methylmethacrylate) (PMMA) play a significant role in modern devices. However, conventional PMMA-based composites with high nanoparticle loadings often compromise transparency for high surface hardness and heat resistance due to nanoparticle aggregation and poor interfacial compatibility. In this work, we successfully fabricated an exceptional composite (MSiO 2 /PMMA composites) with high transparency, superior heat resistance, and high surface hardness using γ-ray irradiation-induced polymerization of methyl methacrylate (MMA) containing uniformly dispersed SiO 2 that was modified by 3-methacryloxypropyl trimethoxysilane and trimethylchlorosilane. Specific silanes were utilized for polarity regulation to reduce the agglomeration of SiO 2 nanoparticles and improve compatibility with MMA. Compared to pure PMMA, the 40-MSiO 2 /PMMA composite sample exhibited significantly improved thermal stability in terms of the temperature at 10% weight loss ( T 10% ), glass transition temperature ( T g ), and decreased coefficient of thermal expansion (CTE). Furthermore, this composite achieves a very high surface hardness (pencil hardness of 6H versus H for pure PMMA) while maintaining transparency similar to PMMA. These MSiO 2 /PMMA composites open up new avenues to enhance the performance and durability of materials used in various industries such as electronics, optics, automotive, and aerospace.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11274-11288
·
IF 4.682
Yang Bin,Yang Yingdong,Xu Xiang,Ke Yuchao,Pan Yang,Su Lifen,Wang Yingying,Wang Shuqing,Qian Jiasheng,Xia Ru,Fu Enfa
Lithium-ion batteries (LIBs) have attracted more and more attention in recent years because of their renewable, clean energy and high-cost performance. Polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA) were expected to be used in the preparation of LIB separator due to their excellent comprehensive properties. In this work, a series of PVDF/PMMA LIB separators were prepared by thermally-induced phase separation (TIPS), which is a simple method of fabricating microporous films. In order to improve the comprehensive performance, SiO 2 was adopted to modify the composite films with various filling proportions by solution method. Results of DSC and XRD tests showed that SiO 2 nanoparticles could significantly reduce the crystallinity of the films, but hardly changed the morphology of PVDF. With an increase in SiO 2 content, both porosity and electrolyte uptake rate for the composite films increased, but an excessive loading of SiO 2 tended to agglomerate inside the films. The porosity and electrolyte uptake rate for composite film containing 3% SiO 2 were found to be the highest. As SiO 2 loading increased, both first charge–discharge capacity and efficiency of the composite films were enhanced with the discharge cycle stability enhanced simultaneously. When 3% SiO 2 was incorporated, the PVDF/PMMA/SiO 2 composite film displayed the best comprehensive performance of the battery among all film samples examined. This study presents a facile way of manufacturing LIB separators with relatively ideal overall battery performance.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 16
·34913-34923
·
IF 3.3
Haoyuan Song,Lingfeng Du,Shaochi Lin,Wei Huang,Kun Wang,Kun Wang,Xiongtu Zhou,Xiongtu Zhou,Yongai Zhang,Yongai Zhang,Yongai Zhang,Chaoxing Wu,Chaoxing Wu,Chaoxing Wu
Quantum dots (QDs)-based light-emitting metal-insulator-semiconductor junction (LE-MISJ) devices currently face challenges of low brightness and short lifetime. The degradation mechanisms of the device remain poorly understood. In this work, to explore carrier dynamics and QDs degradation mechanism in the QDs layer, we construct a LE-MISJ device consisting of electrode/insulator/monolayer QDs/electrode to investigate its photoelectric properties. It is found that continuous carrier injection and carrier transport between QDs lead to electric field-induced dielectric breakdown between QDs, accelerating the formation of defects on the surface of QDs and leading to QD degradation. Experimental and theoretical analyses demonstrate that filling the QDs gap with poly(methyl methacrylate) (PMMA) effectively protects and supports surface ligands and reduces carrier-induced damage. The device with 2% PMMA shows 180% enhanced peak electroluminescence intensity and spectral narrowing (full width at half maximum from 38.8 nm to 31.2 nm) compared to PMMA-free controls. Moreover, the device with 2% PMMA decays to 80% of the original intensity in 4.5 times the time of the device without PMMA. This study can provide some research value to understand the working principle and optimization of LE-MISJ.
研究领域:
纳米技术
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光电子学
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材料科学
·
应用物理
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电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2022
·Vol. 30
·期 12
·20241-20249
·
IF 3.833
Hao Chen,Rui Wang,Wenqiang Ma,Huanhuan Zhang,Lin Yang
The large-scale and continuous production of CsPbBr3@PMMA composite film is realized by the in-situ ultrasonic spray coating method at room temperature. Through embedding CsPbBr3 nanocrystals into the hydrophobic polymer framework, the as-fabricated films (20 cm × 20 cm) exhibit uniform green emissions with a relatively high PLQYs of 76%, and could maintain 80% PL intensity after 3 months storage under ambient conditions. Assembling the green-emissive CsPbBr3@PMMA film and the red-emissive KSF@PMMA film with blue LED chip, a high-performance LCD is obtained, reaching a higher saturation with 126% and 94% color gamut of NTSC and Rec.2020, respectively. This work demonstrates that ultrasonic spray coating technique could be widely used in the large-scale fabrication of uniformly high-quality perovskite films for backlight application.
研究领域:
材料科学
·
显示技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Liu Yongbin,Liu Zhengwei,Gao Jinghui,Wu Ming,Lou Xiaojie,Hu Yanhua,Li Yong,Zhong Lisheng
Dielectrics with improved energy density have long-standing demand for miniature and lightweight energy storage capacitors for electrical and electronic systems. Recently, polyvinylidene fluoride (PVDF)-based ferroelectric polymers have shown attractive energy storage performance, such as high dielectric permittivity and high breakdown strength, and are regarded as one of the most promising candidates. However, the non-negligible energy loss and inferior temperature stability of PVDF-based polymers deteriorated the energy storage performance or even the thermal runaway, which could be ascribed to vulnerable amorphous regions at elevated temperatures. Herein, a new strategy was proposed to achieve high energy density and high temperature stability simultaneously of PVDF/PMMA blends by in situ polymerization. The rigidity of the amorphous region was ideally strengthened by in situ polymerization of methyl methacrylate (MMA) monomers in a PVDF matrix to obtain PVDF/PMMA blends. The atomic force microscopic study of the microstructure of etched films showed the ultra-homogenous distribution of PMMA with high glass transition temperature in the PVDF matrix. Consequently, the temperature variation was remarkably decreased, while the high polarization response was maintained. Accordingly, the high energy density of ∼8 J/cm3 with ∼80% efficiency was achieved between 30 and 90 °C in PVDF/PMMA films with 39–62% PMMA content, outperforming most of the dielectric polymers. Our work could provide a general solution to substantially optimize the temperature stability of dielectric polymers for energy storage applications and other associated functions.
研究领域:
材料科学
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聚合物科学
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电气工程
·
能量存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Chao Shen,Junhua Huang,Shiqi Hu,Ying Chen,Lingling Zhang,Chu Yi,Xin Hu,Yaofei Chen,Lei Chen,Gui-shi Liu,Yunhan Luo
Surface plasmon resonance (SPR) optical fiber sensors are appealing for biomolecular detection due to their inherent characteristics such as flexibility, real-time performance, and high sensitivity. Concurrently, incorporating SPR sensors into wearable devices has emerged as a significant strategy. However, the majority of traditional SPR optical fiber sensors utilize spectrometers for optical readout, which leads to a relatively bulky overall size of the sensing system. Herein, we present the first optical fiber device capable of conducting sensitive SPR measurements and providing direct electronical readout. This has been achieved by integrating a hyperbolic-metamaterial SPR (HMM-SPR) sensor with an on-fiber graphene/PMMA photodetector (oFGPD). The HMM, composed of three pairs of Au/ZrO 2 , has been employed to develop highly sensitive SPR sensors. The oFGPD, which was constructed by transferring a single layer of graphene onto a tapered fiber region and subsequently covering it with a PMMA protecting film, achieved a high responsivity of 3.42×10 6 A W −1 (at 14.07 pW) and a rapid response time of approximately 90 ms at 1550 nm. More significantly, we have incorporated an SPR sensor based on a side-polished fiber (SPF) into the oFGPD, enabling an electronical readout technique for environmental refractive index (RI) SPR signals in a broad potential spectral range, from visible to near-infrared, all within a more compact device. This integration has been successfully validated in the detection of urea and glucose concentrations in artificial perspiration. This approach provides a novel direction for SPR sensor detection and establishes a solid foundation for their application in wearable technology.
研究领域:
光学传感
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生物传感
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纳米技术
·
可穿戴技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Regenerative Biomaterials
·
2023
·
IF 6.7
Miao Xinbao,Yang Shuhui,Zhu Jinjin,Gong Zhe,Wu Dongze,Hong Juncong,Cai Kaiwen,Wang Jiying,Fang Xiangqian,Lu Jiye,Jiang Guoqiang
Polymethylmethacrylate (PMMA) bone cement extensively utilized for the treatment of osteoporotic vertebral compression fractures due to its exceptional handleability and mechanical properties. Nevertheless, the clinical application of PMMA bone cement is restricted by its poor bioactivity and excessively high modulus of elasticity. Herein, mineralized small intestinal submucosa (mSIS) was incorporated into PMMA to prepare a partially degradable bone cement (mSIS–PMMA) that provided suitable compressive strength and reduced elastic modulus compared to pure PMMA. The ability of mSIS-PMMA bone cement to promote the attachment, proliferation, and osteogenic differentiation of bone marrow mesenchymal stem cells was shown through cellular experiments carried out in vitro, and an animal osteoporosis model validated its potential to improve osseointegration. Considering these benefits, mSIS-PMMA bone cement shows promising potential as an injectable biomaterial for orthopedic procedures that require bone augmentation.
研究领域:
骨科
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生物材料
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 41
·34685-34691
·
IF 3.289
Huiwen He,Si Chen,Jun Bai,Haiming Zheng,Bozhen Wu,Meng Ma,Yanqin Shi,Xu Wang
Novel types of transparent PMMA composites were toughened with 3D loofah-like gel networks obtained via the in situ polymerization of methyl methacrylate (MMA) gel with POSS-based supramolecular POSS-Lys(BOC) gelators that have excellent compatibility with the polymerized matrix for the nanoscale nature of supramolecular gel fibers. The “gel networks-energy dissipation” toughening mechanism was investigated using SEM, tensile testing and DMA, the results of which demonstrate that a favorable architecture formed by the gel nanofibres through hydrogen bonding interactions contributes to the toughness improvement in these nanocomposites. In particular, UV-Vis spectrometry and haze meter tests indicate that the PMMA nanocomposites maintain the advantage of good optical transparency. In addition, the physical self-assembly nature of the gel networks allows them to be easily extracted from the polymer matrix, the result of which clearly demonstrates the framework formed by the nanofibres has not only been retained during the in situ polymerization process, but also has an outstanding capacity for the dissipation of energy. As a result, a special type of nanoporous materials with stable pore shapes was obtained, which has potential applications in optical sensors, energy storage and as a Li-ion battery separator.
研究领域:
材料科学
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高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Lu Ye,Jun Wei,Bixuan Zhu,Chuanyezi Cai,Ruiqi He,Gengqi Tong,Jiacheng Guo,Xi Chen,Yu He,Xinrui Yan,Erhao Cheng,Jianjun Zhang,Sude Ma
PVDF is one of the most researched polymers for the development of high energy density film capacitors, and its crystalline structure and dipole motion are closely related to the energy density. In this work, the low-loss amorphous polymer PMMA was introduced as a reinforcing phase to blend with PVDF to form a matrix. PMMA/PVDF-BT nanocomposites were prepared by spin-coating method and subjected to quenching heat treatment in three media, namely, deionized water, ice water, and liquid nitrogen, respectively. The results showed that the quenching heat treatment achieved a synergistic increase in permittivity and breakdown strength without sacrificing the mechanical properties of the nanocomposites, while maintaining a low dielectric loss. The discharge energy density of the quenched heat-treated PMMA/PVDF-BT nanocomposite in ice water at 180 °C was 11.5 J/cm 3 (3100 kV/cm), which was about 958.33 % of the best commercial BOPP film (1.2 J/cm 3 ). This work has great potential as flexible dielectric substrates for advanced and sophisticated film capacitors.
研究领域:
材料科学
·
高分子科学
·
纳米技术
·
介电与电磁学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Siqi Tang,Hongmei Liu,Yiran Tian,Dong Chen,Chenjie Gu,Guodong Wei,Tao Jiang,Jun Zhou
Recently, it is urgent to ameliorate the accumulation and quantification performances of surface-enhanced Raman scattering-based lateral flow immunoassay (SERS-based LFIA) to promote its reliable clinical application. Herein, a smart hydrophilic-hydrophobic SERS-based LFIA strip was demonstrated by decorating Ag nanoplates with hydrophilic surface onto the specific regions of hydrophobic polymethylmethacrylate (PMMA) film with Raman internal standard (IS), which can unexpectedly inhibit the “coffee-ring phenomenon”. The target analytes were consequently enriched in the SERS-active Ag regions by the hydrophobic PMMA, considerably endowing the strip with amended quantitative monitoring ability. Aided by immunoprobes of flower-shaped Ag nanoplates, a limit of detection as 10 pg/mL and an outstanding correlation coefficient value (R 2 ) of 0.992 for carcinoembryonic antigen (CEA) were obtained by utilizing this SERS-based LFIA strip, which can be conducive to clinical monitoring and will broaden the field of vision for the point-of-care diagnostic technique.
研究领域:
分析化学
·
生物医学工程
·
即时诊断
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2025
·Vol. 17
·期 16
·2241
·
IF 4.9
Zhiping Xu,Liangchen Li,Ying Liu,Rui Yang
Poly(methyl methacrylate) (PMMA) and its composites are widely used in industrial applications; therefore, their durability is of great concern. In this study, the photooxidative degradation behavior of nanosilica-filled PMMA composite films and the cooperative effect of mixed solvents containing tetrahydrofuran (THF) and chloroform (TCM), as well as interfacial functional groups, was investigated. The surface functional groups of nanosilica fillers, such as polar, aryl, and alkyl moieties, significantly affect the photodegradation kinetics and pathways for PMMA. The key process lies in the modulation of solvent–solvent reaction selectivity at the polymer–filler interface. Functional groups that selectively promote the chlorination reaction between THF and TCM accelerate PMMA photodepolymerization, while those that suppress this reaction hinder degradation. This interfacial effect is validated by trends in molecular weight loss, volatile product profiles, and MMA yields during aging. Our findings reveal that the photodegradation behavior of PMMA composites is not only governed by environmental conditions but also critically influenced by interfacial chemistry. In this way, this study provides novel insight into the interfacial aging process for polymer nanocomposites, as well as guidance for the rational design of PMMA-based materials with improved durability.
研究领域:
高分子科学
·
材料化学
·
纳米复合材料
·
环境降解
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Lingguang Yi,Changfei Zou,Xiaoyi Chen,Jiali Liu,Shuang Cao,Xiyuan Tao,Zihao Zang,Li Liu,Baobao Chang,Yongqiang Shen,Xianyou Wang
The safety issue of lithium batteries based on liquid electrolytes has become the focus of attention, especially when the batteries are exposed to mechanical, thermal, or electrical abuse conditions. To address this issue, gel polymer electrolytes (GPEs) have attracted widespread interest due to the property of solid–liquid coexistence with higher ionic conductivity, flexibility, and safety. In this work, a poly(vinylidene-fluoride-co-hexafluoropropylene) (PVDF-HFP)/poly(methyl methacrylate) (PMMA) matrix GPE, containing bis(trifluoromethane)sulfonimide lithium salt (LiTFSI) and spherical zirconium dioxide (ZrO2) nanoparticles, is successfully designed and synthesized by a simple one-step solution-casting route. It has been found that the obtained PVDF-HFP/PMMA-ZrO2-6% (PPZ-6%) electrolyte film possesses an excellent tensile strength of 37.7 MPa. Moreover, the PPZ-6% GPE not only has a high ionic conductivity of 1.46 × 10–3 S cm–1 at 25 °C but also presents excellent interface compatibility in an Li||Li symmetrical battery. The LiFePO4||Li cell assembled with the PPZ-6% GPE exhibits good cyclic stability at room temperature, e.g., a high discharge specific capacity of 153.0 mAh g–1, and a high Coulombic efficiency of 99% after 200 cycles at 0.5 C. Therefore, this organic–inorganic hybrid GPE modified with spherical ZrO2 nanoparticles reveals a good application prospect for high-performance lithium metal batteries (LMBs).
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）