COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Xinyang Li,Yanan Wang,Wanyang Sun,Guojin Liu,Yichen Li,Yi Huang,Yi Hu,Jianzhong Shao
Photonic crystal (PC) structurally colored materials attract increasing attention in biomimetic textile coloration due to their unique optical modulation features and brilliant structural colors. Poly(methyl methacrylate) (PMMA) colloidal PCs are widely studied because of their good biocompatibility, environmental stability, and natural degradability. The PCs constructed from hard PMMA nanospheres typically exhibit poor structural stability, limiting their practical application in textile coloration. To address this limitation, methyl methacrylate (MMA) was copolymerized with a polar-group-containing monomer, methacrylic acid (MAA), as well as five different soft monomers: ethyl acrylate (EA), butyl acrylate (BA), 2-ethylhexyl acrylate (2EHA), butyl methacrylate (BMA), and tert-butyl acrylate (TBA). The impacts of the chemical structure and comonomer ratio on the resultant copolymer nanosphere morphology, glass transition temperature ( T g ), optical properties, and assembled PC structural stability were systematically investigated. Soft monomer copolymerization significantly lowers the T g of the nanosphere shell, allowing thermally induced surface fusion to effectively enhance PC structural stability. Among the evaluated systems, P(MMA-TBA) nanospheres (with a mass ratio ω MMA : ω TBA = 2 : 1 ) exhibit good sphericity and excellent adhesion. These properties yield high structural stability and high color saturation after curing at 90 ℃ for 6 min on textile substrates. Large-scale and patterned PC structurally colored fabrics are achieved using shear-induced assembly and screen printing, respectively. The resulting fabrics display bright structural colors with a pronounced iridescent effect, alongside excellent resistance to washing, rubbing, and acidic/alkaline conditions. Download: Download high-res image (295KB) Download: Download full-size image
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高影响因子
MATERIALS LETTERS
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2010
·Vol. 64
·期 9
·1073-1076
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IF 1.94
Wanbing Lu,Yalan Bian,Hongfei Liu,Li Han,Wei Yu,Guangsheng Fu
We report on the synthesis of Si nanocrystallites by pulsed laser ablation in toluene followed by the preparation of composite films with PMMA and their luminescence studies. Transmission electron microscopy images show that the sizes of silicon nanocrystallites vary from about 4 nm down to below 1 nm. The composite films exhibit strong emissions with their spectral peaks continuously moving from 387 to 506 nm when the excitation wavelength varies from 300 to 440 nm, in accordance with the quantum confinement effect . Their time-resolved photoluminescence spectra reveal a multi-exponential decay, implying that the light emission may be also related to some surface states .
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Advances in Materials Science and Engineering
·
2018
·Vol. 2018
·期 1
·7252809
·
IF 1.372
Van-Tuan Mai,Quang-Bac Hoang,Xuan-Dung Mai
Cost-effective methods for preparing ZnO nanostructures are of importance for the deployment of ZnO in many applications including n-type conduits, catalysts, nanophosphor, and optoelectronics. Herein, we present a room-temperature sol-gel method with the aid of ultrasonication to prepare white-emitting ZnO nanoparticles (NPs). X-ray diffraction and electron microscopic analyses revealed that the size and shape of ZnO NPs can be controlled simply by changing the concentration of the Zn precursor. The ZnO NPs had a broad photoluminescence emission, ranging from 450 nm to 800 nm, while their composite in PMMA matrix showed an enhancement in the red region induced by ZnO-PMMA interfacial band-bending effects. The results demonstrated herein promise a simple tool for control over size, shape, and emission of ZnO materials for diverse applications.
研究领域:
材料科学
·
纳米技术
·
光电子学
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高分子化学
·
发光材料
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高影响因子
ACS Omega
·
2021
·
IF 3.512
Lanjuan Xu,Juncheng Jiang,Xinlei Jia,Yingying Hu,Lei Ni,Chao Li,Wenjie Guo
In this paper, carbon nanotubes (CNTs)/poly(methyl methacrylate) (PMMA) composites with excellent thermal stability and flame retardancy were prepared by in situ polymerization. The morphology, structure, transmittance, thermal stability, flame retardancy, and mechanical properties of the materials were characterized with scanning electron microscopy (SEM), thermogravimetric analysis (TGA), cone calorimetry, etc. According to the results, the initial decomposition temperature of CNTs/PMMA prepared using carbon nanotubes with a concentration of 2 mg/mL increases from 175 to 187 °C when compared with pure PMMA, and the weight loss ratio decreases significantly at the same time. In addition, the maximum limiting oxygen index (LOI) value of CNTs/PMMA composites is 22.17, which is 26.9% higher than that of PMMA. SEM images of residues after LOI tests demonstrate that when CNTs/PMMA is heated, a dense and stable interconnected network structure (i.e., carbon layer) is formed, which can effectively inhibit the combustion of pyrolysis products, prevent the transfer of heat and combustible gas, and finally interrupt the combustion of composite materials. However, a 25% decrease in the transmittance of CNTs/PMMA composites is observed in the Ultraviolet–visible (UV–vis) spectra. Although the addition of CNTs reduces the transparency of PMMA, its tensile and impact strength are all improved, which illustrates that CNT is a competitive flame retardant for PMMA.
研究领域:
材料科学
·
高分子化学
·
火灾安全工程
·
纳米复合材料
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 2.8
Changchuan Wang,Jinchuang Zhang,Bingpei Li,Jiao Jia,Yingliang Liu
Poly(methyl methacrylate) (PMMA) exhibits a high coefficient of friction, limiting its use in tribological applications. To address this, graphene oxide (GO), synthesized via the Hummers method, is functionalized with silane KH570 to enhance its compatibility and subsequently incorporated into PMMA through in situ bulk polymerization, resulting in PMMA/KH570-GO composites. The structural, morphological, and functional properties of the composites are characterized using x-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM). Mechanical and tribological behaviors are assessed through tensile and pin-on-disc tests. The results indicate that the addition of 0.06 wt% KH570-GO enhances tensile strength by 13.4%, achieving a value of 76.25 MPa, and significantly reduces the coefficient of friction from 0.7 to 0.25, compared to pure PMMA. Beyond this threshold, a higher KH570-GO loading of 0.20 wt% diminished the tensile strength to 59.23 MPa. The optimal content, in contrast, improved mechanical properties and promoted the development of a lubricating graphitic film during friction, which collectively contributed to a marked enhancement in tribological performance.
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高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Qiangying Wang,Guo Sun,Shiming Wei,Wentao Hao,Wen Yang
Nonconjugated fluorescent polymers are an important class of fluorescent materials for the detection of heavy metal ions. However, the utilization of nonconjugated fluorescent polymer to fabricate film-type detector is mostly limited due to their branched molecular structure. Here in this article, a film-type detector from hyperbranched fluorescent poly(amido amine) (HPAMAM) and polymethyl methacrylate (PMMA) was fabricated through electrospinning to detect cobalt ion in aqueous solution. The HPAMAM/PMMA composite film can respond to Co 2+ ions with high sensitivity and selectivity. Moreover, the fluorescence quenching obeys the Stern-Volmer law in a linear range of 1–50 μM. This work provides an effective route to fabricate film-type detectors from nonconjugated fluorescent polymers.
研究领域:
材料科学
·
环境科学
·
分析化学
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NANO
·
2015
·
IF 1.09
HUI ZHU,PENG CHEN,RU XIA,JIASHENG QIAN,JIBIN MIAO,BIN YANG,LIFEN SU
Poly(methyl methacrylate)-b-poly(vinyltriethoxysilane) (PMMA-b-PVTES) are synthesized using atom transfer radical polymerization (ATRP) and used as macromolecular coupling agents to modify silicon nitride nanoparticles (nano- Si 3 N 4 ). The chemical composition of copolymers PMMA-b-PVTES and modified nano- Si 3 N 4 are confirmed by various characterization techniques. The modified nano- Si 3 N 4 shows excellent hydrophobic nature, which make nanoparticles (NPs) stably disperse in organic solvent. Transmission electron microscope (TEM), particle size testing, contact angle measuring and sedimentation experiment are employed to examine the dispersion of modified nano- Si 3 N 4 in chloroform. By comparing the effects of copolymers with varied number-average molecular weight (M n ) and block length ratio on stabilizing nano- Si 3 N 4 , we discussed the mechanism of macromolecular coupling agent stabilizing NPs. In our experiments, the copolymer PMMA 88 -b-PVTES 17 is found to be the most effective macromolecular coupling agent for stabilizing nano- Si 3 N 4 .
研究领域:
材料科学
·
高分子化学
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2016
·
IF 3.719
Biyun Li,Shengqiang Pan,Huihua Yuan,Yanzhong Zhang
This study aims to assess the nanofiber directionality effects on optomechanical properties of a widely used transparent thermoplastic poly(methyl methacrylate) (PMMA). Aligned fiber-hybrid mats consisted of nylon-6 (PA-6) nanofibers and PMMA microfibers are prepared using a self-blending co-electrospinning method, followed by hot press molding to fabricate into transparent nanocomposites. Effects of nanofiber orientation degree in two orthogonal directions and loading fraction on the optomechanical behavior of the nanocomposites are examined. Optical transmittance differences parallel and perpendicular to the nanofibers’ orientation are found to vary in a range of 3.9–5.4% at 589 nm, and strong mechanical anisotropy is observed with the 1% PA-6/PMMA nanocomposites. A maximal of 3% PA-6 nanofiber loading maintains the nanocomposite high transmittance (>75%) with improved strength and toughness along the nanofiber axis. This study reveals evident anisotropic optomechanical properties of transparent nanocomposites, and highlights the great designability of transparent nanocomposites by using aligned nanofibers as the designing elements.
研究领域:
材料科学
·
纳米技术
·
光学工程
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高影响因子
SOLAR ENERGY
·
2015
·
IF 3.469
Wei Zhou,Moo-Chin Wang,Xiujian Zhao
Poly(methyl methacrylate) (PMMA) doped with various amounts of the organic-dye 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) for luminescent solar concentrator (LSC) applications have been studied. The maximum wavelength of the emission peaks increases from 555 to 561 nm as the doped amount of organic-dye DCJTB increases from 2.08 (sample L3) to 8.33 mg (sample L5), which reveals a slight red-shift effect. The difference between the maximum wavelengths of the absorption and emission spectra ( λ s ) decreases from 58 to 47 nm as the doped amount of organic-dye DCJTB increases from 2.08 to 8.33 mg, which shows the Stokes shift. The short circuit photocurrent ( I sc ) increases from 11.68 to 14.11 mA/cm 2 as the doped amount of organic-dye DCJTB increases from 0 (undoped, sample L0) to 8.33 mg. The optical efficiency ( η opt ) also increases from 41.67% to 60.00% as the doped amount of organic-dye DCJTB increases. The maximum value of the incident photon-to-current conversion efficiency (IPCE) was about 9.0% at 526 nm when doped with 8.33 mg of organic-dye DCJTB (sample L5). The results of the present paper show through a well-conducted study on the optical properties of PMMA doped with organic-dye DCJTB that it can be suitable for LSC applications.
研究领域:
材料科学
·
光学工程
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高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Hao Lv,Bingrong Shi,Yanli Shen,Maorong Wang,Shuaiyi Zhang,Lili Ma,Xia Wang
Random lasers (RLs) have significant applications in micro-nano light emitters, micro-detection, and speckle-free imaging due to their novel properties in low spatial coherence, small size and multi-emission directions. A flexible, affordable approach for creating new scattering materials has recently been suggested for electrospun fibers, which are practical materials for RLs. In this article, we employ the electrospun PMMA fibers as scatters and the DCJTB as gain materials to generate an RL system. The sample shows obvious incoherent random lasing properties. A decrease of the lasing threshold by 32 % is realized when we increase the electrospun voltage from 12 kV to 15 kV due to the generation of a small mean diameter size and concentrated diameter distribution. The lasing threshold of the DCJTB/Au NPs-doped PMMA sample is further reduced to 19.8 μJ/mm 2 by incorporating Au NPs into the electrospun dye-doped fibers. This leads to a lasing threshold reduction of 40 % from the electrospun sample without doping Au NPs and 52 % from the spin-coated film sample, respectively. It indicates that the electrospun method is an efficient and practical approach to make RLs. Furthermore, using single pulse laser stimulation, we investigated several different lasing modes, including spontaneous emission, short wavelength domain, mode competition, and single mode. The actions of photon scattering are analyzed to explain the dramatic lasing process. Due to the photon scattering optical path, there are mode competition and single mode emission regions under different pump energy. The light spot quality of RL shows low spatial coherence with the useful application of speckle-free imaging. This research provides a new method of electrospun to produce low-threshold and high-quality RLs and potentially opens the door for expanding their use in optics and optoelectronic equipment.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Ni Sun,Chengxin Yi,Changbo Xu,Jian Xu,Meng Ma,Yanqin Shi,Huiwen He,Yulu Zhu,Si Chen,Xu Wang
The high surface resistance of polymethyl methacrylate (PMMA) causes its poor antistatic performance. Once the surface is rubbed, the electric charge will be accumulated, and the harmful static phenomena will be generated, which leads to limited application and development of PMMA. In this study, PMMA was modified by the ionic antistatic agent allyl trimethylammonium chloride (TMA), and acrylic acid was used as a compatibilizer to improve the compatibility between TMA and MMA. The surface resistance of PMMA can be reduced to 6.5 × 109 Ω by only 1.25 wt % TMA, which is 5 orders of magnitude lower than that of pure PMMA. Since the antistatic agent can be copolymerized with MMA through a double bond, the antistatic effect obtained is permanent. What is more, the core advantage of high transmittance of the composite material is maintained, and the mechanical properties and thermal stability are improved. The Vicat softening temperature of the copolymer was 96.6 °C when 1.25 wt % TMA was added, which obviously exceeds the long-term service temperature of PMMA. This research provides more possibilities for the study of high-performance PMMA.
研究领域:
材料科学
·
高分子化学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Quansheng Lu,Yun Wang,Yu Lu,Yiping Ren,Ran Fu,Wenbin Chen,Guan Jiang
Wearable biomimetic electronics have aroused tremendous attention due to their capability to continuously detect and deliver real-time dynamic physiological signals pertaining to the wearer's environment. However, upon close contact with the human skins, a wearable sensor undergoes mechanical strain which inevitably degrades the electrical performance. To address this issue, we demonstrate a universal design approach for stretchable and multiplexed biosensors that can yield unaltered ion sensing performance under variable mechanical tensile strains, which is achieved by introducing a PMMA molecular layer between stretchable substrate and ion sensors. Such design demonstrates reliable multiplexed ion sensing capability and provides high sensitivity (>50 mV/decade), reliable selectivity , as well as wide working range (0.1–100 mM) for sodium, ammonium, potassium and calcium ions in complex sweat biomarkers. Via this introduced PMMA molecular layer, our sensor even exhibits 95 % electrical performance maintained up to 30 % tensile strain, whereas the mechanical tensile property is far superior to original sensor performance. Besides, the sensors were also utilized for real-time monitoring of ions in sweat to validate its biomedical electronics applications. This sensing platform can be easily extended to other biomimetic sensors to enable stable signal acquisition for biomedical electronics.
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PubMed
高影响因子
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