Science China-Materials
·
2023
·Vol. 66
·期 5
·1949-1958
·
IF 8.1
Jiang Jiawei,Zhang Peisheng,Tian Yong,Lin Zhong,Zhang Chonghua,Cui Jiaxi,Chen Jian,Chen Xudong
High-performance information encryption materials are crucial for developing advanced technologies that prevent information leakage and combat fraud. These materials must be robust, intelligent, and easily programmable. To meet these criteria, we developed an information encryption toolbox based on a series of novel self-healing photoswitchable dual (P1 and P2) and multistate (P3) fluorescent polymers using two photochromic fluorescent diarylethenes, i.e., 4-hydroxybutyl acrylate link 1,2-bis(2-methyl-1-benzothiophene-1,1-dioxide-3-yl)perfuoro-cyclopentene (SDTE), 4-(acryloyloxy)butyl 4-oxo-4-butanoate link 2,3-bis (2-methylbenzo[ b ]thiophen-3-yl)-5,6-dihydro-4 H -thieno[2,3- b ]thiopyran-4-one (BTBA) and hydrogen-bonding units, i.e., 2-ureido-4[1 H ]-pyrimidinone (UPy). Upon irradiation with different wavelength lights, P1/P2 can be alternated between green/red and quenched states, while P3 can be switched among red, green, and quenched states. Using these polymers to fabricate pixel units can produce reconfigurable patterns and codes displaying good mechanical properties and excellent optical characteristics, including rapid photoresponsiveness, robust photoreversibility, superior fluorescent thermal stability, and strong resistance to acid and base corrosion. Furthermore, we also demonstrated the immediate application opportunities of our toolbox in three-dimensional-code arrays and quick response codes.
研究领域:
材料科学
·
光学
·
信息学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Haiyan Zhang,Zhiguang Xu,Tao Zhang,Yan Zhao
Superhydrophobicity and hygroscopicity are two properties that are theoretically exclusive to each other. The fabrication of functional fabrics with these two properties remains very challenging. In this work, it is demonstrated that a non-sticky superhydrophobic and hygroscopic fabric coating can be prepared via the photo polymerization of hexadecyl acrylate and methacrylic acid. On coating surface , the phase-separation-induced chemical heterogeneity has a unique feature of possessing elevated continuous hydrophobic domain and depressed hydrophilic domain, as evidenced by atomic force microscopy measurement. The elevation of hydrophobic domain (i.e., depression of hydrophilic domain) allows the hydrophilic domain to make negligible contribution to the surface wettability to water drop, but can absorb water molecules, thus inducing the unique superhydrophobic but hygroscopic property. The coating has a very low total surface energy of 22.61 mN m −1 , with its polar part (0.01 mN m −1 ) being negligible, thereby showing a high static water contact angle of ~112° on flat glass slide. The coated polyester fabric shows a non-sticky superhydrophobicity with a static water contact angle of ~151° and a water shedding angle of ~10°, as well as good hygroscopic and anti-static properties. We anticipate that this novel coating and the reported strategy of generating the particular chemical heterogeneity may lead to the development of advanced special wettability coatings for various applications.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 18
·5272
·
IF 3.623
Rong Zhong,Hui Hu,Yanfang Zhou
A trifunctional photoinitiator based on commercial photoinitiators 2-hydroxy-2-methylpropiophenone (Irgacure1173) and 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure2959) was synthesized by an esterization reaction. Its structure was characterized by UV-Vis spectrometry, Infrared Transformed Fourier, Proton Nuclear Magnetic Resonance Spectra, 13 Carbon Nuclear Magnetic Resonance Spectra, Mass Spectrometry, and Thermogravimetry. In addition, its photoinitiating activity was investigated. The results showed that the novel photoinitiator had good photoinitiating activity and thermal stability compared to commercial photoinitiators. The migration of the residual photoinitiator in the cured film was lower than that of 1173 and 2959.Keywords:trifunctional photoinitiator;hydroxyl ketone;synthesis;migration;photopolymerization
研究领域:
材料化学
·
光化学
✓ 已验证
DOI
PubMed
高影响因子
MACROMOLECULES
·
2019
·
IF 5.997
Leilei Huang,Yi Ding,Yajie Ma,Lei Wang,Qizhou Liu,Xinhua Lu,Yuanli Cai
Block copolymer nanoparticles have been widely used for advanced materials. However, the stabilization is challenging. Herein, we present a method for convenient yet reliable synthesis of stabilized polyion complex (PIC) nanometer-sized spheres and micrometer-sized ultrathin lamellae and vesicles by taking advantage of the wavelength orthogonality of UV-induced disulfide exchange and visible light-initiated polymerization-induced electrostatic self-assembly (PIESA). Disulfide-containing PIC vesicles are synthesized at scale using this PIESA, undergoing a small sphere-to-larger sphere-to-lamella-to-vesicle transition. As such, surface-neutralized and surface-charged micrometer-sized vesicles can be achieved. UV irradiation of the vesicles (5.0 mg/mL in water) in ambient air induces very fast exchange reaction of locally confined/enriched disulfide motifs, leading to cross-linking, shape transition, and cystamine salt release in 4 min. As such, cross-linked PIC spheres, lamellae, and vesicles can be achieved, in one pot, from one single vesicle precursor. The wavelength orthogonality is evident from disabled PIESA synthesis under UV light and ineffective postpolymerization functionalization under visible light. The cross-linked PIC spheres and micrometer-sized ultrathin lamellae and vesicles show outstanding shape/size stability and high reversibility in the solution-adaptive electrostatic hierarchical self-assembly and disassembly upon adding ethanol into aqueous dispersion and subsequent dialysis.
研究领域:
材料科学
·
化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2022
·Vol. 12
·期 2
·845-853
·
IF 3.074
Jian Wang,Jian Wang,YanBo Pei,Hongyan Shi,Bo Gao,Suhua Luo
We reveal that polymerization degree is a significant factor that affects the holographic properties of glass-like photopolymer. By modulating polymerization degree, as well as changing the photosensitizer concentration, we fabricate multilayer PQ/PMMA photopolymer, exhibiting excellent performances in storage fidelity and reproduction resolution. A reflection geometry holographic disk system is established using the multilayer sample, in which a high storage density of 40.5GB/cm3 is realized. The reproduced images exhibit high quality with an average diffraction efficiency of 7.4 × 10−4 and average peak SNR of 27.4. This study provides a paradigm for the fabrication and holographic application of other photopolymers.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2020
·Vol. 29
·期 8
·669-677
·
IF 1.707
Lei Yuan,Shi Yiyuan,Jiang Liang,Lei Jingxin,Wu Bo
A novel class of photochromic copolymer based on spironaphthoxazine (SO) moieties was smoothly prepared through the copolymerization of methyl methacrylate (MMA), butyl acrylate (BA) and SO-based monomer by photopolymerization. Polymerization efficiency was studied by measuring the content of SO in eluents, which decreased with increasing mass ratio of SO in precursor monomer. The incorporated SO moieties endow the copolymers with remarkable photochromic ability. The novelty of this study is that unlike conventional physically blending photochromic polymer, SO moieties were chemically bonded with polymer chain, which is an effective way to prevent the SO from migration, thus increasing the stability and reliability during the long-term application. Moreover, the copolymerization was prepared through UV polymerization in the absence of organic solvent, which is environmentally friendly. Polymer chain flexibility can be well tuned by changing the mass ratio of BA. To make the copolymer more flexible, plasticizer of dibutyl phthalate (DBP) was also introduced. The photochromic ability of the as-prepared films was enhanced with increase in flexibility of polymer chain, which achieved the optimum state when the mass ratios of plasticizer DBP (dibutyl phthalate) and precursor BA (butyl methacrylate) were 20% and 50%, respectively. The thermal stability and tensile strength of the products were characterized by thermogravimetric analysis and electronic universal testing machine, which revealed that these copolymers could be applied as photochromic materials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2014
·
IF 2.736
Ruixue Yin,Wentao Wu,Kemin Wang,Wen Jun Zhang
In this work, hydroxyapatite (HA) was first dispersed into cyclic acetal unit based monomers (EHD), and then EHD/HA composites were obtained by in-situ photopolymerization. FTIR and XRD analyses were used to successfully confirm the chemical composition of this composite. Real-time FTIR revealed that there was no significant effect on the photopolymerization process until the HA content was up to 30%. Several samples of such a composite with different loading amounts of HA were prepared to study effects of HA concentrations on the EHD/HA composite in particular in terms of SEM, TG, DMA, water contact angel and in-vitro biocompatibility. The results appeared that the loading of HA could significantly improve the thermal stability, mechanical properties and in vitro biocompatibility of the EHD/HA composite compared with EHD networks.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Min Ouyang,Jiachang Wu,Xiongjian Huang,Guoping Dong
The photopolymerization method for fabricating silica glass is a rapid, eco-friendly, and flexible technique. However, silica glass prepared via this method has limited solubility for rare-earth ions, making it difficult to achieve laser output with such low luminescence efficiency. Here, Al and P elements are introduced into the silica glass matrix to increase the Yb 3+ doping concentration to 1.2 wt%. It is revealed that the fluorescence intensity of the co-doped silica glass is greatly enhanced, making it more suitable as a laser gain material. A porous glass rod co-doped with Al/P/Yb is fabricated based on the above method, subsequently transforming it into a glass microsphere resonator through treatment with a hydrogen-oxygen flame and CO 2 laser. By pumping with a tapered optical fiber , the output of multi-mode (1033 nm and 1040 nm) lasers is achieved in whispering gallery modes (WGMs) resonator. This technology offers a simpler and more efficient method for fabricating laser microsphere resonators, which holds promise for applications in the field of integrated optics .
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2024
·
IF 10.3
Donglin Lu,Kunji Lin,Xianle He,Yuzong Gao,Niansheng Huang,Lifu Lin,Shanghua Wu
The digital light processing (DLP)-based vat photopolymerization enables the fabrication of intricate silicon nitride (Si 3 N 4 ) components. However, challenges still persist in producing low-defect and high-performance ceramic parts at lower volume fractions. In this study, a new block copolymer was employed for the modification of Si 3 N 4 powders. The rheological behavior , dispersant mechanism, curing properties, printing performance of green body, mechanical properties and Weibull modulus of the sintered sample were systematically investigated. The results indicated that the modifier characterized by the long molecular chains and C C double bonds adhered successfully to the surface of Si 3 N 4 particles through hydrogen bonding , and the viscosity reduction effect of this modifier was ten times lower than that of the reported KH560 modifier. Besides, the synergistic dispersion effect achieved via the combination of the long chain modifier with a small molecular dispersant , facilitates the preparation of a 60 vol% (80.74 wt%) Si 3 N 4 slurry. Subsequently, the tightly bonded interlayer of the green body and the complex Si 3 N 4 sintered components with different volume fractions, high consistency and superb mechanical performance (the strength of 865.87 ± 54.35 MPa and the Weibull modulus of 18.49) were fabricated. These findings highlight the promising potential of the proposed modification approach for advancing the fabrication of high volume fraction and high-performance Si 3 N 4 components.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Liyuan Fan,Shaobin Wen,Bin Peng,Mengshi Chen,Yanqiu Wang,Qiang Zhang
Membrane fouling remains a persistent and arduous challenge in the industrial treatment of different surfactants-stabilized oily wastewater. Constructing a robust antifouling and sustainable hydration coating on the membrane surface to efficiently repel oils or surfactants is a critical requirement. Herein, cyclodextrin-based poly(ionic liquid)s (PILs) coatings are cross-linked via the co-deposition on poly(vinylidene fluoride) (PVDF) of quaternized heptkis(6-deoxy-6-vinylimidazolium)-β-cyclodextrin (CD-Vi) derivatives as skeleton and acrylic acid (AA) monomers, and following one-step free radical photopolymerization. Combining with the strong hydration of the CD-based PILs coating, the resultant membrane exhibits fabulous superhydrophilicity and underwater superoleophobicity, oil repulsion, and self-cleaning capability. It demonstrates robust mechanical durability and chemical stability in harsh environments without losing its superhydrophilicity. Besides, the PIL-CD/AA coating can separate various surfactant-free and different surfactants (cationic CTAB, anionic SDS, and nonionic TWEEN 80) stabilized oil / water emulsions. During the long-term cycle operations, it also realizes stable recyclability with a series of permeation fluxes as high as removal efficiencies (>99.6 %) after 20 cycles for surfactant-free cyclohexane-in-water emulsion and 10 cycles for CTAB-stabilized isooctane-in-water emulsion.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 3.9
Fan Yang,Minghang Wang,Yong Jian Zhang
Functional polyvinylethylene glycols (PVEGs) with pendent vinyl groups were synthesized by Pd/B synergistic catalysts and their structures were characterized by 1 H NMR and FT-IR. The photopolymerization of the obtained PVEGs with multifunctional thiols in the presence of a photoinitiator proceeded smoothly via thiol-ene photo-click reaction to give a series of crosslinked materials by the variation of the molecular weight of PVEGs and a ratio of thiols and enes. The curing behavior was studied by FT-IR and the properties of crosslinked materials were characterized by the test of gel content, swelling ratio, and water absorption. The dynamic mechanical analysis, mechanical properties, thermogravimetry, and surface properties of the crosslinked materials were investigated and the performance of coating for the crosslinked film materials was also characterized. The crosslinked film materials can be further functionalized by post-crosslinking modification through thiol-ene photo-click reaction. Graphical
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
DYES AND PIGMENTS
·
2025
·
IF 4.2
Yizhi Shao,Dandan Liu,Qinwei Xia,Zhendong Song,Wei Chen,Ke Sun,Changjiang Zhou,Yangyang Xu,Tao Gong
The elongation of π-conjugation could efficiently enhance the photophysical performances or photochemical reactivties of organic molecules, which adapts to the requests of both designing fluorescent materials and organic photoinitiators (PIs). However, there is no work attempted to design organic PIs with large molar extinction coefficients and long π-conjugation lengths by using hybridized local and charge-transfer (HLCT) method, which is meaningful to obtain high-performance PIs with significant fluorescence/photoluminence properties. What's more, how to overcome the obstacles derived from the unbalance between high triplet concentrations and photoinitiation abilities of organic PIs seems to be crucial, while PI's design from a view of excited state were rarely reported for rational regulation strategy up to now, we thus introduced four chromophores with D-A structures designed by HLCT method, whose triplet states were confirmed by Ultra-fast absorption spectroscopy, into photopolymerzation, where LEDs in various wavelengths were utilized as the light sources in the present work. Noticeably, some of these dyes could furnish high monomer conversions and rapid photopolymerization rates, not only under the irradiation of 405 nm LED, but also long-wavelength light source at 660 nm, which have been confirmed by the photopolymerization kinetics and 3D printing technique. Here, the spin-orbit coupling (SOC) coefficients were carried out as well, to examine their effects on photoinitiation abilities of investigated molecules, which can be regarded as the first attempt to achieving light-harvesting PIs from excited state design. Finally, the corresponding photochemical mechanisms were investigated by steady state photolysis, fluorescence quenching experiments, particularly by frontier orbit energy and distributions to examine the interactions between these dyes with co-initiator/additives in details.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）