JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 11
·8413-8420
·
IF 1.569
Tian Jiao,Ma Qianli,Dong Xiangting,Yang Ming,Yang Ying,Wang Jinxian,Yu Wensheng,Liu Guixia
The flexible color-tunable [Eu(BA) 3 phen + Tb(BA) 3 phen]/PMMA composite nanobelts have been fabricated by single axial electrospinning. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and fluorescence spectroscopy were used to characterize the final products. As-prepared nanobelts are almost uniform and the thickness and width of them are respectively ca. 890 nm and 16.6 ± 0.09 μm. The fluorescence intensity of Eu 3+ is increased with adding more Eu(BA) 3 phen into the composite nanobelts, and the fluorescence intensity of Tb 3+ is found to increase monotonically with introducing more Tb(BA) 3 phen into the composite nanobelts. By adjusting the ratio of Eu(BA) 3 phen to Tb(BA) 3 phen complexes, the fluorescence color of composite nanobelts can be tuned from red to yellow, yellow green, and green under the excitation of 290-nm single-wavelength ultraviolet light. Besides, the emission color could also be tuned easily from red to yellow, yellow to green via variation of excitation wavelengths. The novel color-tunable composite nanobelts have potential applications in the fields of color displays and sensor systems.
研究领域:
材料科学
·
光学
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DOI
高影响因子
POLYMER
·
2013
·
IF 3.379
Bolin Li,Jie Zhou,Xin Xu,Jincheng Yu,Wei Shao,Yong Fang,Xiaolin Lu
The surface sum frequency generation (SFG) vibrational spectroscopic spectra of PMA and PMMA films prepared from solvents with different qualities were found different. This suggests that the surface molecular structures of PMA and PMMA films were affected by the solvent quality. A simple phenomenological model was used to describe the chain conformational order at the polymer surface by correlating the SFG resonant signals of the side chromophoric groups to the introduced chain arc included angle. This model is believed to be applicable for polymers with short and rigid side chromophores active for the SFG spectroscopy.
研究领域:
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Na Sun,Xiangjun Meng,Zhenggang Xiao
In order to improve the dispersibility of nanoparticles in polymer matrix , a feasible processing way for grafting high density hydrophobic polymer on the surface of silicon nitride (Si 3 N 4 ) nanoparticles was carried out by an atom transfer radical polymerization (ATRP) method. The ATRP initiators were first immobilized on the surface of Si 3 N 4 nanoparticles by using 3-aminopropyltriethoxysilane coupling agent and 2-bromoisobutyryl bromide, and then the polymerization of methyl methacrylate was initiated and propagated on the surface of Si 3 N 4 nanoparticles by ATRP reaction. The chemical groups, size, morphology, grafting content, and colloidal thermal stability of PMMA–Si 3 N 4 particles were studied by Fourier transform infrared (FTIR), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). Results indicate that the grafting of polymer on the surface of Si 3 N 4 nanoparticles is successful and the grafting content of PMMA reaches 60.4%. Moreover, the grafted polymer chains have changed the surface properties of Si 3 N 4 nanoparticles and enhanced their dispersibility in organic media.
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 Chemistry B
·
2014
·Vol. 3
·期 5
·911-918
·
IF 0
Yuhua Song,Tingbin Zhang,Xiaoyan Song,Ling Zhang,Chunqiu Zhang,Jinfeng Xing,Xing-Jie Liang
The low transfection efficiency of polycations is still a major problem for successful gene therapy. To address this issue, in this study, hydrophilic poly(vinyl pyrrolidone)-graft-poly[2-(N,N-dimethylamino)ethyl methacrylate] (PVP-g-PDMAEMA) and amphiphilic poly(vinyl pyrrolidone)-graft-poly[2-(N,N-dimethylamino)ethyl methacrylate]-block-poly(methylmethacrylate) (PVP-g-PDMAEMA-b-PMMA) were synthesized via the atom transfer radical polymerization (ATRP) method, and their properties as gene vectors were investigated subsequently. PVP-g-PDMAEMA formed random coils in water and PVP-g-PDMAEMA-b-PMMA self-assembled into spherical core–shell micelles with a very low critical micelle concentration of only 6.3 × 10−3 mg mL−1. PVP-g-PDMAEMA-b-PMMA/pDNA polyplexes demonstrated an excellent gene transfection efficiency, which showed not only much higher gene transfection efficiency than PVP-g-PDMAEMA/pDNA polyplexes, but obviously surpassed 25k PEI at low N/P ratio around 3 on 293T cell lines. Hence, the results suggested that PVP-g-PDMAEMA-b-PMMA could be a highly efficient gene vector.
研究领域:
生物化学
·
基因治疗
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
BIOMATERIALS
·
2016
·
IF 8.387
Ming Lei,Zihang Peng,Qian Dong,Yuanfeng He,Zhaoguo Zhang,Xuefei Zhang,Mina Yan,Chunshun Zhao
One of the most important and challenging goals in pharmaceutical prevention for posterior capsule opacification is to preserve an effective drug concentration in capsular bag for a long period without affecting the patients' vision. Here, a novel kind of composite, which was prepared by 2-hydroxyethyl methacrylate (HEMA) and methyl methacrylate (MMA) via a two-step process, was applied for capsular tension ring (CTR) as an implant that could deliver docetaxel (DTX) over a long period of time. The drug release rate of the composite could be controlled by the ethyleneglycol dimethacrylate (EGDMA) content and the ratio of HEMA/MMA as well as the structure of porous PMMA framework. The CTR could continuously release DTX for up to 6 weeks in vitro and maintain DTX in effective concentration in the aqueous humor after 42 days. Docetaxel-load capsular tension ring (DTX–CTR) presented strong inhibition on the lens epithelial cells in-vivo without obvious damage to normal tissues. These results indicate that the drug sustained-release CTR can provide a promising application in posterior capsule opacification prevention.
研究领域:
眼科
·
药学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 6
·1582-1594
·
IF 2.347
Xu Qingbo,Wang Xinyu,Xu Wei,Zhang YanYan,Xu Zhenzhen
Immobilizing inorganic or organic particles on cotton fabric to increase the surface roughness, followed by coating with low surface reagents to reduce the surface energy, are the dominant strategies to prepare the superhydrophobic cotton surface. However, the inorganic or organic particles can easily fall off the surface of the fabrics. Thus, the surface roughness of the fabric could be reduced during the process, resulting in the poor durability of the superhydrophobic fabric. In this work, the surface of the cotton fabric was etched by cellulase. Following this, the treated fabric was grafted using a diblock copolymer (poly[(methyl methacrylate)- b -(2-(dimethylamino)ethyl)] (PMMA- b -PDMAEMA)), which was synthesized following the reversible addition-fragmentation chain transfer (RAFT) polymerization process. The mist polymerization technology was used for the process. The coatings successfully endowed the cotton fabric with superhydrophobic properties. The maximum WCA value recorded was 159.9 °. The treated fabric exhibited excellent mechanical and chemical stability. Moreover, the modified cotton sample also exhibited good self-cleaning effects in the presence of solid dust and liquid contaminants. It also exhibited excellent oil-water separation properties. Therefore, the superhydrophobic fabric prepared using a combination of the etching method and mist polymerization technology can find its potential application in home and industrial areas.
研究领域:
材料科学
·
纺织工程
·
表面化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wentao Wu,Gaojie Zhao,Liangyong Chu,Jian Wu,Kexin Miao,Liming Shen,Xiaobao Li,Ningzhong Bao
The giant reduction of the barrier properties due to self-healing microcapsules and the lack of real-time protection during the healing remained the main challenges in self-healing anticorrosion coatings. Herein, a facile strategy using Janus graphene oxide (GO) as a dense and flexible shell has been proposed to synergistically solve these challenges. Benzotriazole (BTA) was used to synthesize Janus GO at the oil–water interface, and Janus GO/BTA/poly(methyl methacrylate) microcapsules were prepared. Energy-dispersive X-ray spectroscopy, Fourier infrared spectroscopy, Raman spectroscopy, and ultraviolet spectrophotometer analysis confirmed the formation of a Janus GO structure with one surface hydrophilic and the other hydrophobic. The surface morphology of J-GO-capsules with a high GO coverage rate was observed by scanning electron microscopy. The high biobased content coating containing J-GO-capsules showed a low-frequency impedance value above 1010 as assessed by electrochemical impedance spectroscopy after being immersed in 3.5 wt % NaCl solution for 60 days. In addition, the low-frequency impedance values of the coating were maintained after being scratched due to the self-healing properties of the J-GO-capsules as well as the real-time protective effect of the BTA. Biobased coatings with the best overall properties among all of the self-healing anticorrosion coatings were prepared.
研究领域:
材料科学
·
化学工程
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
BioNanoScience
·
2026
·Vol. 16
·期 5
·335
·
IF 4
Ming Hui,Li Xuefeng,Sha Zhentao,Xiang Yuhe,Liu Yi,Li Yang,Wu Mei
To address the short effective duration of conventional scale inhibitors in mature oilfields, hydroxyethyl diphosphonic acid (HEDP) / Methyl methacrylate (PMMA) submicron capsule were engineered via reverse microemulsion evaporation for sustained release. Optimized synthesis (core-wall ratio 1:6, Span80/W ratio 1:2, 3.5 h curing) achieved 95.3% encapsulation efficiency. The submicron capsule maintained 70–90% scale inhibition efficiency against CaCO₃ over 8 h. Flow tests demonstrated exceptional retention: submicron capsule withstood > 860 pore volumes (PV) before breakthrough, outperforming liquid inhibitors (160 PV) by 5.4-fold. Pretreatment with Cetyltrimethylammonium(CTAB) bromide further enhanced adsorption. Crucially, mechanistic studies revealed surface charge (zeta potential) as the dominant retention controller, while particle size showed negligible influence. This study proposes a surface-charge-dominated retention strategy for long-term scale inhibition in oilfields, which may contribute to more sustained scale control.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 2.8
Jianhang Hai,Shuli Wei,Tianlong Zhou,Jin Wang
Polymer/metal–organic framework (MOF) mixed matrix membranes (MMMs), where MOF materials are doped into a polymer matrix, have great potential in gas separation, electronic devices, sensing, and other fields. To extend the application of polymer/MOF MMMs as optical films for sensing, an in-depth investigation of their optical properties is necessary. In this work, PMMA/ZIF-8 composite films are prepared via in-situ polymerization or one-pot synthesis, with varied ZIF-8 loading amounts. The structure, morphology, gas adsorption capacity, thermal stability, and optical properties of these composite films are characterized. The results showed that the ZIF-8 crystals can be uniformly dispersed in these composite films. Nitrogen adsorption measurement also confirms this uniform dispersion, where the adsorption capacity of the composite films increases with increasing ZIF-8 loading amount. Additionally, thermogravimetric analysis proves that the introduction of ZIF-8 considerably enhances the thermal stability of the composite films. Further, the measurement results show that the refractive index of the composite films increases with increasing ZIF-8 loading amount at the wavelengths of 632.8 and 1550 nm, while the optical loss decreases at low loading amounts and slightly increases at high loading amounts due to the scattering effect. This work provides inspiration of MMM-based optical films for gas sensing.
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Chen Xu,Jianjun He,Ye Cao,Xiang Wang,Yijie Yang,Huie Zhu
The performance of electron beam lithography (EBL) is highly dependent on the resist material, and the behavior of main-chain scission (MCS) resists such as PMMA is strongly influenced by the molecular weight and polydispersity index (PDI). To systematically investigate these factors, a series of PMMA resists with precisely controlled molecular weight and PDI were synthesized via RAFT polymerization, and broad-distribution samples were obtained through blending. Results show that soft-bake temperature significantly affects pattern fidelity and line-edge roughness (LER), with PMMA-200 k exhibiting optimal performance at 140 °C soft-bake, achieving L/S patterns with line critical dimensions (CDs) of 25 nm and an LER of 2.24 nm. Low number-average molar mass (Mn) PMMA (13 k, PDI <1.1) displayed high roughness or line breakage at 25–40 nm feature sizes, whereas high-Mn samples (68 k, 133 k, 200 k, PDI <1.1; 128 k, PDI = 1.35) all showed LER <3 nm, indicating that increasing Mn and reducing PDI can improve performance; however, for high-Mn samples without low-Mn chains, this enhancement is relatively limited. In contrast, commercial PMMA with higher Mn but broader distributions exhibited lower resolution and higher LER, suggesting that low-Mn chains (∼12,670 g/mol) in broad-distribution samples are the main limiting factor. PMMA-200 k also achieved L/3S EBL patterns with a line CD of 22 nm, complex EBL patterns, and L/S patterns with a line CD of 30 nm and LER of 2.51 nm under EUV exposure. Importantly, low-Mn components existing in the samples greatly limit the lithographic performance greatly. These findings provide guidance for the optimization and development of MCS-type resists.
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2026
·
IF 2.6
Jia Guo,Di Rong,Yan Wang,Keqiong Pan,Xiaohong Shang,Shiwei Wang
Electrochromic devices rapidly color and fade at ±3.0 V • The transmittance of electrochromic devices at 550 nm wavelength is 77.8% • The optical contrast of electrochromic devices is as high as 54.5%. A solid-state electrolyte film composed of PVB/PC/PMMA/LiTFSI (BAP) was prepared through hot-pressing, and using this electrolyte film as the electrolyte layer, a (glass/ITO/WO 3 /BPA/ITO/glass) laminated electrochromic safety glass device was fabricated. Under ±3.0 V voltage, the device achieves rapid coloration and fading, with an excellent optical contrast of up to 77.8%, indicating its broad prospects for application in energy-efficient smart electrochromic windows.
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yangjie Zhong,Chengming Tang,Jidong Sun,Yafeng Zhang,Shaoxiong Cai,Jiaxin Yu
A dielectric film with high breakdown strength and dielectric constant are crucial for the reliable operation of electrowetting on dielectric (EWOD). In this study, barium titanate (BaTiO3) nanoparticles modified with a silane coupling agent (KH550) were incorporated into poly(vinyl fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) and poly(methyl methacrylate) (PMMA) to prepare a BaTiO3–KH550/P(VDF-TrFE-CTFE)/PMMA composite film to enhance the breakdown strength and dielectric constant of a dielectric layer. Results revealed that BaTiO3–KH550 is uniformly dispersed within the P(VDF-TrFE-CTFE)/PMMA polymer matrix. When the BaTiO3–KH550 content is 10 wt %, the dielectric constant reached 24.6, and the energy density was 2.65 J cm–3, representing increases of 94% and 73%, respectively, compared to the pure P(VDF-TrFE-CTFE)/PMMA film, where was 12.7 and 1.53 J cm–3. Additionally, the breakdown strength of all films remains above 150 kV mm–1 due to the strong interfacial interaction between PMMA and P(VDF-TrFE-CTFE). Furthermore, the breakdown strength can keep at 194.90 kV mm–1. Electrowetting experiments demonstrated that the composite film exhibited a high initial contact angle of 105.04°, with a contact angle variation range of 35.3° under a low DC voltage ranged from 0 to 50 V. The results indicated that this film is potential for applications in low-cost and high-dielectric-performance EWOD dielectric layer materials.
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产品关联
DOI
高影响因子
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