COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 6
·655-663
·
IF 2.4
Wang Zhen,Leng Kangwei,Liu Jiuhong,Li Yueqiu,Liu Shucheng,Li Yan,Wang Zhongwei,Yu Qing,Han Yuxi
Poly(methyl methacrylate) microspheres with narrow particle size distribution were synthesized successfully under visible light (LED@420 nm) in this study, and no RAFT agent was involved. A novel acylphosphine oxide, (2,4-dimethylphenyl) phenylphosphine oxide (2,4-DMTPO), was used as the photoinitiator. Uniform microspheres with the weight-average diameter (D w ) of 1.03 μm and polydispersity index (PDI) of 1.06 were obtained upon irradiation for 30 min, when the ratio of methyl methacrylate (MMA) to solvent was 1:10, the amount of polyvinylpyrrolidone (PVP) and 2,4-DMTPO was 30 wt% and 2 wt% of MMA, respectively. However, no microspheres could be detected instead of large blocks when (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO) was the photoinitiator under the same condition. It could be due to the higher light absorption ability and quantum yield of 2,4-DMTPO at 420 nm than TPO. A possible formation mechanism of PMMA microspheres was proposed and the effects of photoinitiator, MMA, irradiation time, and PVP were discussed. Results shown that regular microspheres were formed when the irradiation time exceeded 30 min, and the amount of PVP was in the range of 25 to 40 wt% of MMA. Lowering the amount of photoinitiator to 0.5 wt% resulted in ca. 66% and 4% decrease of D w and PDI, respectively. This study may provide a rapid and energy saving way of synthesizing monodispersed PMMA microsphere, which would be benefit for the fields of coating, template, and so on.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Zhi Liu,Jiang-hui Zhao,Peng Liu,Ji-huan He
Superhydrophobic–superoleophilic fibrous polymethyl methacrylate (PMMA) membranes were prepared by electrospinning technique. The membranes exhibited a high water contact angle up to 153.9° and nearly zero oil contact angle. This super wettability property is attributed to hierarchical macro- and nanostructure on surface of PMMA membrane and can be conveniently tuned by adjusting the weight ratio of binary solvent of N,N-dimethylacetamide and acetone. Resultant fibrous PMMA membranes with superhydrophobic–superoleophilic property can be used in water treatment. This facile one-step strategy shows an alternative approach to produce special wettability surface and will benefit this material.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhenghai Ou,Yongsheng Yi,Ziting Hu,Jiajie Zhu,Wenzhen Wang,Hua Meng,Xiaozheng Zhang,Shengqi Jing,Shanhu Xu,Feng Hong,Jian Huang,Juan Qin,Fei Xu,Run Xu,Yanyan Zhu,Linjun Wang
The optoelectrical properties of semiconductor devices are strongly related to the film morphology. Here, we found that, for CsPbBr 3 thin films prepared by spray coating, the addition of polymethyl methacrylate (PMMA) can completely eliminate voids and greatly reduce the surface roughness of the as-deposited films. As a consequence, the optoelectronic properties of the photodetectors fabricated as a simple vertical structure of Au/CsPbBr 3 (PMMA)/ITO can be improved. With the addition of PMMA, the dark current of the photodetector is reduced at least four times, and the photodetector exhibits a favourable optical response. With the illumination ranging from 400 to 510 nm, the calculated responsivity varies from 3.70 to 5.20 A/W. A good response speed with a rise time of 6.6 ms and a decay time of 11.3 ms can be achieved. Moreover, unlike the inorganic-organic hybrid perovskite detectors, this inorganic perovskite photodetector without encapsulation shows a favourable stability with a decay of 20% after 40 days under ambient air at 20% humidity.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2017
·
IF 0
Xiao Chen,Hua Lei,Tao Xu,Jie Zhang,Yu Qiu,Lu Tan
PMMA/nanoCu antibacterial plastic was prepared by in situ polymerization using MMA as monomer, BPO as initiator and surface treated nanoCu as antibacterial agent. AMEO was used for surface treatment of nanoCu. ATR-FTIR spectra showed that AMEO successfully reacted on the surface of nanoCu. SEM spectra showed that nanoCu dispersed evenly in the PMMA/nanoCu composite. Antibacterial test results showed that the composite had a strong antibacterial effect on Escherichia coli, and the antibacterial rate reached more than 99%. Therefore, the PMMA/nanoCu composite can be used in various fields of antibacterial plastic products.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Changhai Zhang,Tongqin Zhang,Mengjia Feng,Yang Cui,Tiandong Zhang,Yongquan Zhang,Yu Feng,Yue Zhang,Qingguo Chi,Xianli Liu
The increasing energy problem and the demand of environmental protection raise higher requirements for the development of clean energy. Dielectric capacitors have attracted lots of attention as a supporting facility of energy storage and conversion for clean energy, but their further development is limited by the low energy storage performance. In this paper, all-organic composite dielectrics were reported, with a poly(methyl methacrylate) (PMMA)/poly(vinylidene fluoride) (PVDF) composite dielectric with different mixing ratios as the matrix and the organic molecular semiconductor with high electron affinity [6,6]-phenyl C61 butyrate acid methyl ester (abbreviated as PCBM) as fillers. The related test results show that with the increase in the doping contents of PCBM, the energy storage density increases obviously. When the doping content of PCBM is 0.9 wt %, the PMMA/PVDF-based organic composite dielectric possesses an optimal breakdown field of 685.67 kV mm–1, accompanying excellent energy storage performances (Ue, ∼21.89 J cm–3; η, ∼70.34%). The PVDF blended with PMMA strategy not only restrains the ferroelectric polarization loss of PVDF but also improves the breakdown strength of the polymer. More importantly, the polarization and breakdown strength of the composites can be synergistically enhanced by filling with PCBM fillers.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Lei Chen,Yufei Tang,Kang Zhao,Xiang Zha,Jiaxin Liu,Hao Bai,Zixiang Wu
High mechanical property especially the exorbitant elastic modulus is the common complication of the clinical polymethylmethacrylate (PMMA) bone cement which will generate the fracture of the adjacent bone and even aseptic loosening, other side effects including excess thermal temperature and low efficiency of the drug release bother the development of the PMMA bone cement. The present study aims to investigate the optimum dosage of gelatin as the porogen, which reduced the elastic modulus of the bone cement to the relatively close level of the cancellous bone. Meanwhile, better antibiotic release profile was introduced by enhancing the specific surface area and interconnectivity than the neat PMMA bone cement. Compared to the PMMA bone cement, the mechanical and thermal property was successfully reduced by the porous structure, the component with 200–400 μm gelatin has the better porosity which resulted in the increasing drug release amount and rate than that of the PMMA bone cement. Furthermore, data analysis and fitting curve could guide experiments, in turn, to obtain the PMMA bone cement with specific requirements of the mechanical properties by the addition of gelatin as the pore-forming agent, and in some cases for predictive purposes, to estimate how a change of gelatin may affect the porosity, mechanical properties, and drug release profiles.
研究领域:
材料科学
·
生物医学工程
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Vietnam Journal of Chemistry
·
2023
·Vol. 61
·期 4
·461-469
·
IF 0.9
Nguyen Thi Dieu Linh,Khuc Duong Huy,Nguyen Thi Kim Dung,Ngo Xuan Luong,Thai Hoang,Do Quang Tham
The 3D printing PMMA/ZrO 2 filaments with a diameter of 1.75 ± 0.05 mm were fabricated by using a single-screw extruder at temperatures of four heating zones of 190, 200, 210, and 210°C. Testing samples were prepared from the extruded filaments by using a fusion deposition modeling 3D printer and a Haake MiniJet piston injection molding machine. Fourier transform infrared spectroscopy, mechanical properties, field emission scanning electron microscopy (FESEM), differential scanning calorimetry, and thermogravimetric analysis of the filaments were investigated. It was suggested the formation of physical and molecular interactions between surface hydroxyl groups of ZrO 2 nanoparticles and C-O-C groups of PMMA in the PMMA/ZrO 2 filaments. FESEM images of the filaments indicated the good dispersion of ZrO 2 nanoparticles in the PMMA matrix, nevertheless, there was still the formation of clusters of ZrO 2 nanoparticles in the nanocomposite filaments. The incorporation of nano ZrO 2 increased the thermal properties, bending, and tensile moduli of PMMA. The mechanical properties of the 3D-printed samples were lower than those of the molded samples. However, the bending strength of the 3D-printed samples was much higher than 50 MPa, bending modulus was much higher than 1800 MPa, as required for acrylic bone cement (in ISO 5833:2002).
研究领域:
材料科学
·
化学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 6
·1788-1794
·
IF 2.137
Si Chen,Bo Zhou,Meng Ma,Yanqin Shi,Xu Wang
Permanently antistatic and high transparent PMMA terpolymer, P(MMA-co-HPA-co-SPMA), were reported in this paper, providing a new method to significantly improve the antistatic properties of PMMA without sacrificing transparency. 2-Hydroxypropyl acrylate (HPA) was chosen as a kind of compatilizer because of the good compatibility with both methyl methacrylate (MMA) and sulfopropyl methacrylate potassium salt (SPMA), a potential antistatic agent with a strong hydrophilic group. The mechanical and optical properties of P(MMA-co-HPA-co-SPMA) terpolymer barely show any visibly differences compared to PMMA homopolymer, confirmed through Fourier transform infrared, dynamic mechanical analysis, and a haze meter. Furthermore, antistatic property analysis indicates that only a small amount of SPMA can significantly improve the antistatic properties of the obtained PMMA terpolymers. The surface resistivity of the P(MMA-co-HPA-co-SPMA) sheets could be reduced to 10 9 Ω sq −1 order of magnitude, while the SPMA content reached 0.72 wt%. The hydrophilic groups, the hydroxyl and acrylate sulfonate, on the surface contributed to attract the water molecules, which rendered it a reasonably good antistatic property. These selected terpolymers will provide more opportunities to develop high-performance and antistatic products made from PMMA materials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Tao Wang,Mengyu Zhang,Rui Song,Zhenhao Fan,Ahmad Azmin Mohamad,Kaixin Song,Dawei Wang,Mingfu Zhang
The inherent limitations (particularly low discharged energy density, U d ≈2 J∙cm −3 ) of commercially available biaxially-oriented polypropylene (BOPP) film capacitors significantly restrict their broader application in advanced energy storage systems. This study presents a novel approach to overcome this limitation through the development of all-organic dielectric composite films. A ternary polymer blend matrix, comprising poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride) (PVDF), and poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)), is employed, with the incorporation of 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) molecular semiconductors as nanofillers. Systematic investigation reveals that controlled modulation of the PMMA content within the blend matrix effectively suppresss leakage current by reducing crystallinity, minimizing crystallite size, and stabilizing the γ -phase in the ferroelectric polymer matrix. Simultaneously, the introduction of NTCDA nanofillers create a high density of deep electron traps, thereby impeding charge injection and enhancing charge carrier trapping within the composite film. The optimized composite film, incorporating 0.5 vol.% NTCDA and 40 wt.% PMMA within the PVDF/P(VDF-HFP) matrix, demonstrates a substantial enhancement in both breakdown strength ( E b ) of 1054 MV∙m −1 and U d of 28.10 J∙cm −3 , representing a considerable improvement over conventional BOPP-based capacitor. These findings offer a promising strategy for the design and fabrication of high-performance all-organic dielectric composite films for next-generation energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Yongji Yao,Zhang Chen,Wei Wei,Pan Zhang,Yong Zhu,Qi Zhao,Kai Lv,Xiaopeng Liu,Yanfeng Gao
Inorganic-organic nanocomposites composed of nanoparticles and polymers offer a vast space for tuning material properties have attracted considerable interest. In this work, a nanocomposite composed of Cs 0.32 WO 3 (CWO) nanoparticles as functional additive and poly (methyl methacrylate) (PMMA) as matrix was developed for the application to energy-saving windows. The key to the process was in-situ polymerization of methyl methacrylate (MMA) monomers in the presence of CWO nanoparticles , which can effectively prevent the nanoparticles from agglomeration. As a result, a homogeneous dispersion of the nanoparticles in the PMMA matrix was obtained and the nanocomposite exhibits a high visible light transmittance (>70%), a low haze (<1%) and excellent near-infrared (NIR, 780–2600 nm) blocking ability (above 90%). Furthermore, the nanocomposite has a good stability in a high temperature/humid environment. The thermal stability and mechanical properties of the nanocomposite is remained comparable with PMMA. A model house was applied to evaluate the heat shielding performance of the nanocomposite, and the results indicate that the nanocomposite is superior to ITO glass. All of these results suggest that the proposed CWO/PMMA nanocomposite is promising for the application to energy saving windows.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 11
·1239
·
IF 2.654
Bing Yu,Liang He,Yifan Wang,Hailin Cong
Magnetic porous microspheres are widely used in modern wastewater treatment technology due to their simple and quick dye adsorption and separation functions. In this article, we prepared porous polymethylmethacrylate (PMMA) microspheres by the seed-swelling method, followed by in situ formation of iron oxide (Fe3O4) nanoparticles within the pore. Then, we used diazo-resin (DR) to encapsulate the porous magnetic microspheres and achieve PMMA@Fe3O4@DR magnetic material. We studied the different properties of magnetic microspheres by different dye adsorption experiments before and after the encapsulation and demonstrated that the PMMA@Fe3O4@DR microspheres can be successfully used as a reusable absorbent for fast and easy removal of anionic and aromatic dyes from wastewater and can maintain excellent magnetic and adsorption properties in harsh environments.Keywords:poly (methylmethacrylate) (PMMA);magnetic;diazo-resin (DR);adsorption;dye
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Linlin Zhang,Yan Gao,Xin Ding
A PMMA (polymethly methacrylate) oligomer coating photoanode sensitized with the Ru(bpy) 3 phosphoric acid derivative 1 as photosensitizer and complex 2 as water oxidation catalyst was assembled for light driven water splitting. A simple and effective method was optimized by immersing the sensitized photoanode into the DCM solution dissolving 2 wt% PMMA for 15 s. With the decorated photoanode as working electrode, the DS-PEC displayed much better long-term stability, the photocurrent density of which was found to be 0.57 mA/cm 2 after 200 s sustaining light illumination and is four times as high as the undecorated one (0.15 mA/cm 2 ).
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）