POLYMER COMPOSITES
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2024
·Vol. 45
·期 9
·8543-8554
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IF 4.8
Songbo Tan,Guohui Wang,Jun Liu,Xiaoli Chen,Zui Tao,Jinlu Chen,Xuan Yang,Guowen Peng
Development of shielding materials for 222 Rn and γ radiation has crucial implications for ensuring the safety of individuals. This paper reports the synthesis of modified graphene nanosheets (MGNPs) via the reaction of KH560 with graphene nanosheets (GNPs), while melt blending and hot-press molding technique were used to fabricate a multifunctional polymer composite shielding material, MGNP/WB/PMMA (polymethyl methacrylate). Successful synthesis of MGNP was confirmed by Fourier transform infrared spectroscopy, and scanning electron microscope (SEM) analysis was utilized to assess the distribution of functional fillers within the cross-section of the polymer composite. Additionally, thermogravimetric analysis (TGA) demonstrated that MGNP and WB particles enhance the thermal stability of the polymer composite materials. Compared to pure PMMA, 98.7% decrease in the radon diffusion coefficient was observed for MGNP1.5 wt%/PMMA composite material. In addition to enhance the radon-blocking characteristics of the polymer composites, inclusion of WB particles also boosts their shielding capacity against gamma radiation. The 222 Rn diffusion coefficient of MGNP1.5 wt%/WB25wt%/PMMA polymer composite material decreased by 99.6% and at energies of 60 KeV, 80 KeV, 122 KeV, 365 KeV, the mass attenuation coefficient (MAC) for the composite material increased by 0.79, 1.97, 0.57, and 0.05 cm 2 /g, respectively, compared to pure PMMA. Highlights The PMMA composite materials doped with graphene nanosheets demonstrate outstanding resistance to 222 Rn. Graphene nanosheets modified by KH560 exhibit favorable dispersion within PMMA. WB can further enhance the radon resistance of MGNP/WB/PMMA composite materials. The polymer composites exhibit excellent 222 Rn and gamma ray shielding properties.
研究领域:
材料科学
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辐射防护
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 6
·1-8
·
IF 1.969
Li Hui,Zhang Qiuyu
In this paper, P n BA- g -PMMA brush-like and centipede multigraft copolymers were synthesized via DPE seeded emulsion polymerization and miniemulsion polymerization. PMMA macromonomers with single tail and double tails were prepared by DPE-technique in emulsion and Steglich esterification. Then P n BA- g -PMMA multigraft copolymers were obtained by miniemulsion copolymerization. The molecular weight and polydispersity indices of PMMA macromonomers and graft copolymers were characterized by GPC. The structural characteristics, weight content of PMMA and the number of grafting sites in brush-like and centipede multigraft copolymers were determined by 1 H NMR. The thermal performance of graft copolymers were analyzed by DSC and TGA. AFM confirmed microphase separation between P n BA block and PMMA block.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Shaopan Qin,Min Wu,Hongshun Zhao,Jianbin Li,Maoyin Yan,Yurong Ren,Yanli Qi
Gel polymer electrolytes (GPEs) effectively combine the advantages of high ionic conductivity and reduce the risk of leakage associated with liquid. In this study, a chemically cross-linked gel polymer electrolyte was prepared by in-situ polymerization using polymethyl methacrylate (PMMA) as a matrix and neopentyl glycol diacrylate (NPGDA) as cross-linking agent. The cross-linked structure of the GPE was preliminarily investigated, as well as the influence of the degree of cross-linking on its physical properties. The GPE exhibited a superior conductivity of 1.391 mS cm −1 at 25 °C. Herein, the Li|GPE|LiNi 0.8 Co 0.1 Mn 0.1 O 2 cell has an excellent capacity retention rate of 80.7% after 150 cycles at 0.5 C in addition to a high discharge specific capacity of 203 mAh g −1 . The structure of the cathode material is shielded from the production of byproducts during the charging and discharging of lithium-ion batteries by the cross-linked PMMA GPE .
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhiqiang Ren,Xinyi Deng,Changwen Li,Shoujun Xiong,Changwei Li,Jinhua Li,Lai Wei,Jianying Wang
Conventional perovskite nanocrystals (PNCs)-based luminescent solar concentrators (LSCs) suffer low loading, reduced transparency and poor moisture/oxygen/light/ thermal stability. To solve the above issues, in this work, we report the preparation of Cs 4 PbBr 6 @PMMA perovskite particles for the first time, which exhibit a green luminescence with emission wavelength of 517 nm and a photoluminescence quantum yield (PLQY) of 32.9 %. The prepared Cs 4 PbBr 6 @PMMA perovskite particles are utilized as fluorescent materials while the PMMA serve as a waveguide material for fabrication of single-layer LSCs. On one hand, the Cs 4 PbBr 6 @PMMA perovskite particles are well-dispersed in the PMMA, demonstrating excellent compatibility and good transparency at high loading (>60 % over 600 nm at the loading of 39.3 wt%). Furthermore, the single-layer LSCs exhibit external optical efficiency ( η opt ) from 2.26 % to 3.50 % with increased loading from 14.0 % to 39.3 wt%. On the other hand, the surface-grafted PMMA provides robust protection for the perovskite particles, significantly improving the stability of the LSCs. The LSCs can retain over 90 % of their initial η opt after two weeks under harsh conditions of high relative humidity (RH = 90 %) and high temperature (60 °C) and sunlight exposure. The single-layer LSCs also maintain over 81.9 % of their initial η opt after 10 months under indoor daylight storage conditions.
研究领域:
材料科学
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能源技术
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光学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Yu Wang,Wenxiong Chen,Meng Pan,Weijie Liang,Jiahao Lu,Rui Feng,Yang Zhang
Polypropylene (PP) is extensively implemented in electronic equipment and power systems owing to its superior performance, such as high breakdown strength ( E b ), low dielectric loss (tan δ ), and outstanding self-healing capability. However, its low dielectric constant ( ε r ) and restricted energy density ( U e ) obstruct the miniaturization and integration of dielectric capacitors. To address these limitations, PP/PMMA/PP-g-MAH dielectric blend films were prepared via the melt blending and hot-pressing process. The transesterification reaction between the pendant anhydride groups of PP-g-MAH and the ester groups of PMMA forms ester bonds, which reduces the interfacial free energy and, in turn, significantly improves the compatibility between PP and PMMA. The blend film containing 4 wt% PP-g-MAH exhibits a high U e of 7.53 J/cm 3 at 502 MV/m, with an excellent charge–discharge efficiency ( η ) of 97.8%. This work presents a feasible strategy for developing all-organic polypropylene-based dielectric film with superior energy storage performance.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 10
·2169
·
IF 4.6
Yanyu Gao,Xueyang Chen,Yunjie Zhang,Xue-Hui Dong,Qianqian Yu,LinGe Wang
Traditional iodine-based polyvinyl alcohol (PVA) polarizers encounter considerable durability challenges, especially in humid conditions, due to poor moisture resistance. This study presents an innovative organic–inorganic composite film composed of poly(methyl methacrylate) (PMMA) and carbon nanotubes (CNTs), fabricated via electrospinning, solvent vapor annealing (SVA), and uniaxial stretching. Pre-aligned PMMA/CNT composite fibers were electrospun and underwent SVA to stabilize the structure and reduce inter-fiber porosity. Further uniaxial stretching aligned the CNTs, enhancing optical anisotropy and polarization performance. The optimized parameters, 45 min of SVA and 75% stretching strain, produced composite films with a polarization degree exceeding 60%, which was combined with exceptional moisture resistance (<2% weight variation under 90% relative humidity). The integration of CNTs enhanced mechanical stability while preserving alignment during post-processing, thereby tackling the crucial challenge of scalable nanomaterial orientation. This study provides a scalable, cost-effective approach for developing durable polarizing materials with enhanced performance for optical devices in demanding environments.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yangjie Zhong,Chengming Tang,Jidong Sun,Yafeng Zhang,Jiaxin Yu
Dielectric materials with superior dielectric properties are pivotal for enhancing the performance of electrowetting-on-dielectric (EWOD) devices. In this work, MWCNTs@SiO2 core–shell-structured fillers were fabricated by coating multiwalled carbon nanotubes (MWCNTs) with a uniform SiO2 outer layer. This innovative core–shell structure was incorporated into a poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) and poly(methyl methacrylate) (PMMA) organic matrix to fabricate composite films with enhanced dielectric properties. The incorporation of core–shell fillers significantly enhanced the microcapacitor effect and Maxwell–Wagner–Sillars interface polarization. At a low filler loading of 4 wt %, the composite achieved a high dielectric constant of 25.4 (at 100 Hz), representing a 108.2% enhancement compared to the pristine polymer matrix, while maintaining a low dielectric loss as low as 0.05. Furthermore, the SiO2 shell effectively mitigated inhomogeneous electric field distribution induced by dielectric constant mismatch, reducing field distortion and consequently enhancing the breakdown strength. Notably, under a DC voltage below 50 V, a high contact angle modulation range of 38.3° was achieved, representing a 151.97% enhancement compared to the pristine polymer matrix. These findings provide a new strategy for developing high-performance dielectric materials for EWOD applications.
研究领域:
材料科学
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聚合物复合材料
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介电材料
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
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2025
·
IF 6.3
Xinglei Cui,Runhua Li,Zhonglian Li,Zhenbo Xu,Jialiang Huang,Zhi Fang
Superhydrophobic surfaces are in high demand for insulating materials because of their excellent self-cleaning property, which is advantageous to enhance their anti- wet and pollution flashover capability. Herein, we report on a one-step, energy-efficient and environment-benign process for fabricating superhydrophobic insulation surfaces on polymethylmethacrylate (PMMA) in an Ar/hexamethyldisiloxane(HMDSO) gas using nanosecond-pulsed DBD in homogeneous-filamentary mixed mode. The discharge mode judged by dynamic imaging with ICCD is maintained by controlling the HMDSO content and extending the discharge gap. It is found that the mixed discharge with filaments in the homogeneous plasma contributes to the fabrication of rough superhydrophobic film with robust mechanical stability, as further evidenced by SEM, AFM, FTIR, and XPS analysis. The film not only introduce shallow traps to accelerate potential decay and increase the dry flashover voltage, but also shrinks the wetting area to increase the wet flashover voltage 2.6 times that of the unprocessed PMMA. Moreover, results indicate that transformation from superhydrophilic to superhydrophobic surfaces can be fine-tuned by regulating the precursor content. The proposed strategy on the nanosecond pulse-driven discharge in mixed mode enables the effective fabrication of superhydrophilic and superhydrophobic surfaces and may provide practical guidelines for advanced surface engineering.
研究领域:
材料科学
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等离子体技术
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表面工程
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DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Shun Wang,Bin Yang,Liangyong He,Yingdong Yang,Shishuang Cui,Shuqin Liu,Pengjun Chen,Ru Xia,Jiasheng Qian,Yuchao Ke,Tao Jiang
In this study, poly(methyl methacrylate) (PMMA)/polylactic acid (PLA)/boron nitride (BN) composites were fabricated by melt blending and solution blending, respectively. When the content of BN achieved 20%, the thermal conductivities of both in-plane and out-of-plane were found to increase considerably by 303 and 334%, respectively. Scanning electron microscopy (SEM) observations substantiated that a thermal conduction path could be in situ established at a filler content of 20% in the composites prepared by solution blending, which was earlier than that established in the composites prepared by melt blending. Analysis based on the results of both transmission electron microscopy (TEM) and SEM after a selective etching of the composites proved that BN was selectively distributed in the PLA phase, making it possible to prepare composites with greatly enhanced thermal conductivity (TC) via altering the mixing order of preparing the route. More importantly, our findings suggested that there exists a direct scaling between mechanical properties and TC, which could clearly be expressed by a linear master curve. The present work will provide insight into the industrial manufacturing of PMMA/PLA/BN composites, which could be potentially applicable in electronic devices, e.g., 2.4G/5G routers, notebook keyboards, etc.
研究领域:
材料科学
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聚合物复合材料
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热管理
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纳米材料
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电子封装
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DOI
高影响因子
ACS Omega
·
2026
·
IF 5.2
Yuzhen Dong,Jingwu Zhao,Yang Lv,Chunhao Wang,Mingshuo Mao,Zhongxin Ping,Yinghui Yang,Wanting Xu,Lankun Zhang,Fangxiao Kan,Fang Xie
Liquid-metal-based magnetic droplet robot attract considerable attentions due to their noncontact operation, rapid response, strong maneuverability, and deformability. However, prolonged use leads to gradual alloying between the liquid-metal and magnetic particles, which causes a progressive decline in magnetic performance until complete loss. In this work, we report a strategy to address both the alloying and interfacial nonwettability between the liquid-metal and magnetic particles via a poly(methyl methacrylate) (PMMA) layer onto the magnetic particles via atom transfer radical polymerization (ATRP). Subsequently, liquid-metal-based magnetic droplet robot was constructed to perform rapid locomotion and targeted cargo transport in complex environments under actuation of external magnetic field. Finally, liquid-metal-based magnetic droplet robot can achieve reversible circuit switching or long-term repair of damaged circuits. This work presents a new methodology for fabricating liquid-metal-magnetic particle composites. The resultant droplet robot exhibit outstanding performance, thereby holding significant promise for future use in biomedical, electronic, and related fields.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Rong Huang,Xiaoman Xiang,Danxia Zheng,Geyu Feng,Xinyu Ge,Rongze Zhu,Peng Chen,Xueling Chang,Xiao-Chun Hang,Xiaoyang Qi,Longfei Ruan
A modified method achieves in-situ synthesis of water-stable CsPbBr 3 /PMMA composites. • Pb O coordination bonds and Si-O-C covalent bonds enable a stable structure. • The composites remain fluorescently stable after 30 days of water immersion. • CsPbBr 3 /PMMA composites achieve dynamic anti-counterfeiting in water. • Excellent biocompatibility enables 24 h fluorescence imaging in osteosarcoma cells. Halide perovskite nanocrystals (HPNCs) exhibit exceptional optoelectronic properties but suffer from poor stability in polar environments and potential toxicity, limiting their practical applications in information anti-counterfeiting, data encryption, and biological fields. Combining HPNCs with poly(methyl methacrylate) (PMMA) can provide a strategy to construct CsPbBr 3 /PMMA composites that exhibit enhanced structural stability and tunable emission. This work reports an improved facile room-temperature ligand-assisted re-precipitation strategy for the in situ synthesis of CsPbBr 3 /PMMA composites with a silane-mediated protective shell, which significantly enhances the optical performance with a high PLQY of up to 86.0%, tunable emission wavelength ranging from 463 nm to 619 nm and photoluminescence average lifetimes spanning from 70.5 ns to 155.9 ns. PMMA bridges CsPbBr 3 and the silane agent by forming Pb O coordination bonds with Pb 2+ on the crystal surface and Si-O-C covalent bonds with the silane's Si O groups, thereby generating a dual-layer inert protective shell of PMMA and SiO 2 around the crystal that passivates surface defects and enhances structural stability of the composite. In addition, the CsPbBr 3 /PMMA composites exhibit excellent stability in water, ethanol, phosphate buffer saline (PBS), and Dulbecco's Modified Eagle's Medium (DMEM), particularly retaining over 90.0% of initial emission after 30 days in water, which enables a water-stimulated anti-counterfeiting application, displaying a “VICTORY” signal. Furthermore, the CsPbBr 3 /PMMA composites demonstrate high cell viability (>90.0% at 1000 μg/mL) and effective fluorescence imaging after 24 h in osteosarcoma cells. This work can be extended to other HPNCs, realizing stable optoelectronic devices for applications in advanced anti-counterfeiting and biological fields. A modified in-siu synthesis method produces CsPbBr 3 /PMMA composites that remain optically stable in water for over 30 days and are suitable for water-stimulated anti-counterfeiting and clear biological imaging. Download: Download high-res image (230KB) Download: Download full-size image
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Chenxi Wang,Long Zhang,Xuwen Yao,Xiaoqi Guo,Jian Liu,Jie Tang,Qiaoli Lin
The compatibility of polypropylene (PP) and poly(methyl methacrylate) (PMMA) critically governs their properties, yet inherent immiscibility causes phase separation and weak interfacial adhesion. To overcome these limitations and simplify compatibilization, amphiphilic fluorescent Janus nanoparticles (TPE@Janus NPs) were synthesized via emulsion polymerization and applied as a novel compatibilizer in PP/PMMA blends prepared by melt blending. Fluorescence tracing confirmed preferential localization of TPE@Janus NPs at the PP/PMMA interface, which reduced interfacial energy and inhibited phase separation. At an optimal loading of 0.9 wt%, the PMMA domain size decreased by 42 %, while impact and tensile strengths increased by 31 % and 23 %, respectively. Thermal stability was also enhanced, with T 50 increasing by nearly 150 °C (from 410.8 to 557.0 °C). This study establishes the dual functionality of TPE@Janus NPs—as a highly effective compatibilizer and an in situ fluorescent probe for interfacial dynamics—offering a practical strategy for the rational design of advanced polymer composites with tailored interfacial properties.
研究领域:
材料科学
·
聚合物复合材料
·
纳米技术
·
界面工程
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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）