JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Fahai Dong,Nannan Zhu,Zhongya Zhang,Jiawei Jiang,Juhai Weng,Lijuan Zhang
This study successfully synthesized a novel SiCN ceramic precursor with high photosensitivity and ceramic yield through the addition reaction of Si-H and N-H groups in polysilazane (PSZ) with isocyanate groups in 2-isocyanoethyl methacrylate (IEM). The reaction mechanism between IEM and PSZ, and the curing and pyrolysis effects were investigated. The results showed that compared with 5 s exposure time, PSZ could not be cured, while the curing depth of PSZ could reach 1.51 mm after adding IEM chemical grafting modification, which significantly improved the curing printing efficiency. Increasing IEM content to 10 wt% reduced cure shrinkage from 13.85 % to 12.56 %, with a ceramic yield of 79.92 %. The bending strength of SiCN ceramic reached 30.7 MPa, and the microstructure of pyrolyzed samples was dense and free of defects. This research expands the application field of 3D-printed SiCN ceramics.
研究领域:
材料科学
·
高分子化学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2020
·Vol. 29
·期 10
·891-900
·
IF 1.707
Yang Mingxin,Hu Jie,Meng Jin,Shan Xiaojing
A hydrogel with dual thermo and photoresponsive characteristics was developed. Using poly( N -isopropylacrylamide) (PNIPAM) as the thermosensitive unit, the hydrogel network can undergo reversible swelling/shrinking behavior under different temperatures (20 °C and 37 °C) stimulation. A supramolecular host–guest complex composed of azobenzene (Azo) and α -cyclodextrin ( α -CD) was used as the photosensitive unit. Azo and α -CD can undergo reversible recombination/dissociation behavior under the stimulation of different wavelengths of light (365 nm and 430 nm). Methylene blue (MB) was selected as the model drug to measure the controlled release behavior of the hydrogel under different temperatures and photoirradiations. The experimental results showed that the hydrogel containing the thermosensitive component (PNIPAM) and the photosensitive component ( α -CD/Azo) released 69.3% and 47.2% of MB at 20 °C and 37 °C, respectively. Under the condition of light wavelengths at 430 nm and 365 nm, 73.2% and 65.6% of MB were released, respectively. The results showed that α -CD and Azo formed a supramolecular host–guest complex, which could undergo reversible binding/dissociation under the action of light stimulation, thereby controlling MB to enter and exit CD cavity. In addition, when the ambient temperature was lower or higher than the lower critical solution temperature of PNIPAM (LCST, 32 °C), the hydrogel underwent a responsive volume change to control the loading and release of MB molecules. So, combining the dual thermo and photoresponsibility, this smart hydrogel could be applied for multiple controlled release mechanisms.
研究领域:
材料科学
·
药学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Haiqing Zhu,Yumiao Su,Junfeng Li,Yulin Ding,Minyu Li,Wenmu Li
It is of significance to develop a photosensitive polyimide for the demand of further integration and miniaturization of integrated circuits. In the current work, the rigid benzimidazolone-derived diamines and the corresponding photosensitive polyhydroxyimide were successfully developed. All polyimides exhibit excellent processability and comprehensive physical properties. Especially, our fluorinated polyhydroxyimide has all the desirable properties for a patterning process which includes high glass transition temperature (369 °C), low dielectric constant (2.94 at 1 MHz), and excellent optical transparency (λcutoff as low as 332 nm). Based on this fluorinated polyhydroxyimide, our photosensitive polyimide has a sensitivity of 172 mJ cm–2 and a contrast of 4.2, and fine positive patterns with resolutions of 5 and 10 μm were achieved. This provides a feasible framework for expanding the application of benzimidazolone polyimide.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2023
·Vol. 12
·期 28
·2301379
·
IF 10
Qijiang Mao,Zhengze Huang,Yiyin Zhang,Qi Chen,Kexin Jiang,Yi Hong,Hongwei Ouyang,Yuelong Liang
Colon leakage is one of the most severe complications in abdominal trauma or surgery cases. It can lead to severe abdominal infection and abdominal adhesions, resulting in prolonged hospital stays and increased mortality. In this study, a photosensitive hydrogel is proposed, which can swiftly form a strong adhesion coating on the damaged colon after UV irradiation, to realize quick cure and suture-free repair of colon leakage. The newly developed biological gel consists of hyaluronic acid methacryloyl (HAMA) and hyaluronic acid o-nitroso benzaldehyde (HANB) in the optimal ratio of 3: 1, which exerts both the rapid photocuring properties of HAMA and the strong tissue adhesion properties of HANB. HAMA/HANB shows excellent adhesion stability on wet surfaces, presenting controllable mechanical properties, ductility, adhesion stability, and chemical stability; it also evades foreign body response, which relieves the degree of abdominal adhesion. The underlying mechanism for HAMA/HANB promoting wound healing in colon leakage involves the reconstruction of the colon barrier, as well as the regulation of the immune reaction and neovascularization. In all, HAMA/HANB is a promising alternative suture-free approach for repairing colon leakage; it has a reliable healing effect and is expected to be extended to clinical application for other organ injuries.
研究领域:
医学
·
生物材料学
·
外科手术
✓ 已验证
DOI
高影响因子
APL Materials
·
2024
·Vol. 12
·期 4
·
IF 5.3
Lin Jia,Wang Shuai,Jin Hua,Cui Shuyuan,Wang Rongwen,Yang Yihang,Huang Guimei,Wang Jinhuo
The preparation of ceramic materials with complex porous structures through photopolymerization-based 3D printing requires the development of stable and printable slurries. In this study, zirconium acetylacetonate was incorporated into the thiol vinyl organosilicon prepolymer to create a photosensitive Si–Zr–O–C slurry. Regarding the natural bone structures and the Tyson polygon principle, a gradient pore structure was designed and then printed using a digital light processing 3D printer. After printing, the effects of sintering temperatures on the phase composition and structure of Si–Zr–O–C ceramics were systematically investigated. Subsequently, a comparative analysis of structure and properties was performed on sintered samples with different zirconium acetylacetonate contents. The results revealed that the sample containing 30 wt. % zirconium acetylacetonate exhibited a higher compressive strength of 9.70 ± 0.28 MPa and a lower room temperature thermal conductivity of 0.528 W m −1 K −1 . This study confirmed the significant potential of using 3D printing technology to prepare Si–Zr–O–C precursor ceramics with a porous structure.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 100
·期 3
·414-422
·
IF 2.326
Li Limin,Zhao Gaoyang,Lei Li,Li Chengshan
Herein, the chelated precursor solution (Mg/BzAc) was synthesized using magnesium acetate as raw material and benzoylacetone as chemical modifier. The prepared solution was coated on (00 l )-oriented LaAlO 3 (LAO) single crystal substrate to fabricate the MgO/BzAc gel films. First, ultraviolet absorption spectroscopy was employed to analyze the ultraviolet photosensitivity of the MgO/BzAc gel films and the characteristic absorption peak corresponding to π-π* transition in Mg/BzAc chelate rings was detected at the wavelength of 329 nm. It is found that the intensity of this peak decreased gradually with increase in UV irradiation time, which indicates that the MgO/BzAc gel films exhibit good ultraviolet photosensitive properties. Then, MgO crystalline films with biaxial texture were prepared by heat-treating MgO/BzAc gel films at 850 °C in air for 60 min. Finally, micro-patterned MgO films with biaxial textures were prepared on the LAO substrate using photosensitive sol-gel lithography in combination with the above heat-treatment process.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 7
·1715-1721
·
IF 5.976
Baofang Cai,Yanjie Su,Jing Hu,Cheng Zou,Yafei Zhang
One-dimensional C60 nanostructures with tunable bandgaps and a wide optical absorption range are considered as potential candidates for ultraviolet/visible photodetectors. Herein, we report a low-cost visible photodetector based on C60 nanorods (NRs), which was synthesized using the liquid–liquid interfacial precipitation method. The experimental results demonstrate that the photosensitivity of C60 NR-based visible photodetectors can be enhanced significantly by coupling with Cu2O nanocubes (NCs, ∼20 nm in size). The photosensitivity of a photodetector based on the C60 NR/Cu2O NC is ∼72.5 and 40 fold higher after ratio optimization with 405 and 532 nm light illumination, respectively, which are 3.8 and 5.6 times correspondingly higher than those of pure C60 NRs. Furthermore, the energy band structure of the C60 NR/Cu2O NC heterojunction was analyzed using cyclic voltammetry to illustrate the dramatically enhanced photosensitivity. The enhanced mechanism of photosensitivity is ascribed mainly to the fact that the formation of a p/n heterojunction in the C60 NR/Cu2O hybrid strengthens the separation of photo-induced electrons/holes at the interface.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 4
·842
·
IF 2.8
Yan Li,Yu Ma,Fan Chang,Haiyun Zhu,Chengshan Tian,Fengan Jia,Yang Ke,Jiakun Dai
Using slow-release fertilizer is one of the sustainable strategies to improve the effectiveness of fertilizers and mitigate the environmental pollution caused by excess usage of fertilizer. In this study, a slow-release urea fertilizer with water retention and photosensitivity properties was prepared by a two-step method. It was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and an infrared camera. This fertilizer can prolong the release period of urea, improve water-retention capacity of soil, and carry out photothermal conversion under illumination. Comparing four release kinetics models, the Ritger–Peppas model was the best fitting model for releasing behavior in soil, and diffusion followed the Fickian mechanism. The application of fertilizer on winter wheat was carried out to intuitively evaluate the fertilizer’s effects on promoting plant growth and resisting water stress. Thus, this study provides a new strategy for improving fertilizer utilization rate and maintaining soil moisture, which will be beneficial for sustainable agriculture.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2025
·
IF 7.4
Huifa Meng,Kaijin Chen,Chuying Li,Longfei Zhang,Yanwei He,Zining Zhao,Peixin Wu,Hai Zhu,Zhenguo Chi,Jiarui Xu,Siwei Liu,Yi Zhang
Traditional photosensitive polyimide (PSPI) materials require a high curing temperature and exhibit low transparency, limiting their applications in thermally sensitive optical devices. To overcome this challenge, soluble photosensitive polyimide resins were synthesized based on the structural design of bio-based magnolol monomer. It is noteworthy that the PI photoresist, developed by using the as-prepared polyimides and non-toxic solvents (2-acetoxy-1-methoxypropane, PGEMA) and other additives, demonstrated an impressive low-temperature curing performance (180 °C). Furthermore, the solvent residue presents in the cured film using PGEMA as solvent was markedly decrease when compared to that of the cured film using N-methyl pyrrolidone (NMP). In addition, the C-PI-3 films cured by photoinitiated thiol-ene radical reactions exhibited high transparency with an average visible light transmittance of 87.8 %, as well as excellent thermal stability, dielectric and breakdown properties, and photo-patternable capabilities. This partially bio-based and innocuous solvent-based PSPI with low-temperature curable and high transparency properties could be a pioneering example to resolve the challenges of energy efficiency and environmental sustainability, and are expected to be used in the field of color filters.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2025
·Vol. 17
·期 11
·1428
·
IF 4.9
Bowen Zheng,Jing Li,Ning Li,Wa Li,Shuai Zhang,Haile Lei
A soluble photosensitive polyamide ester precursor (BAFPAE) was synthesized through copolymerization of 2,2-bis [4-(4-aminophenoxy)phenyl]hexafluoropropane (HFBAPP) with 4,4′-(4,4′-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA). Hydroxyethyl methacrylate (HEMA) was incorporated as a photosensitive functional group, and a transparent photosensitive polyimide film was obtained by thermal curing of the precursor film. The effects of reaction temperature and varying HEMA equivalents on the mechanical properties of the film were systematically investigated. The results indicated that the formation of polyacrylate-polyimide interpenetrating polymer networks (IPNs) was pivotal in preserving the mechanical integrity of the material. The optimized BAF-x-yexhibited a toughness of 12.69 MJ m3, a Young’s modulus of 2.86 GPa, an elongation at break of 21.16%, and a tensile strength of 92.68 MPa.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Jianan Shan,Gaoming Mo,Haijun Chen,Zhiyun Huangfu,Jing Huang,Qin Ouyang,Qing Huang
SiC fiber is a critical structural material for high-temperature extreme environments and nuclear energy applications. Traditional methods for producing industrial SiC fibers include oxidation and electron irradiation. In this study, a photo-sensitive nitrogenous polyvinylaluminocarbosilane (PVACNS) is synthesized by uniformly blending polyaluminocarbosilane (PACS) and triallyl isocyanurate (TAIC). This precursor can be melt-spun into fibers and rapidly UV-cured at room temperature. After thermal pyrolysis at 1200°C and sintering at 1800°C of the cured fiber, amorphous SiAlCNO fibers with an oxygen content of 9.25 wt%, nitrogen content of 4.42 wt%, and a C/Si ratio of 1.60, and crystalline SiAlC fibers with an oxygen content of 0.02 wt%, nitrogen content of 0.11 wt%, and a C/Si ratio of 1.18 are obtained. The main UV curing mechanism involves homopolymerization of C = C bonds, in addition to minor hydrosilylation reaction between Si–H and C = C bonds. Between 400°C and 600°C, oxygen, nitrogen, and carbon contents decrease significantly due to the decomposition of TAIC. At 1200°C, the amorphous SiAlCNO fiber consists of amorphous SiC x O y , SiC x N y phases, and free carbon, with formation of Al–C and Al–N bonds. β-SiC begins to form at 1400°C. At higher temperatures above 1400°C, SiC x O y and SiC x N y phases decompose, leading to notable decrease in oxygen and nitrogen content at 1600°C and 1800°C. However, due to the presence of Al–C and Al–N bonds, the formation of voids and defects is inhibited and the coarsening of β-SiC is suppressed, resulting in a relatively dense structure in the SiAlC fibers at 1600°C and 1800°C.
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
Small
·
2025
·
IF 12.1
Yimei Liu,Yu Lan,Ying Tie,Linxiang Yu,Yating Zhang,Jianguo Wang,Tao Wang
With the escalating demands for sustainability in flexible sensing materials, the development of a novel, environmentally friendly, and multifunctional ionogel utilizing bio-based raw materials has become paramount. However, castor oil with abundant modified sites and natural flexible long carbon chain structure, is rarely explored in the context of ionogels. Here a novel approach is proposed to fabricate high-performance ionogels through rapid photopolymerization of photosensitive modified acrylate-based castor oil (ACO) with ACMO (acrylomorpholine), and [Mim-BS] [HSO 4 ] (1-sulfobutyl-3-methylimidazolium hydrogen sulfate). Herein, ACO not only participates in the photochemical crosslinking of the ionogel but also imparts exceptional stretchability to the ionogel due to its flexible structure. By modulating the content of acrylate-based castor oil, the transparency, conductivity, and mechanical properties of the ionogel can be significantly enhanced. Furthermore, the ionogel incorporating a bio-sourced component (castor oil) obtained through this photochemical crosslinking process enables high-precision 3D printing and demonstrates remarkable degradability, low-temperature resistance, excellent self-healing capabilities, and sensing performance. These findings provide new perspectives for the design of green ionogels and beyond.
研究领域:
材料科学
·
环境科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）