OPTICS AND LASER TECHNOLOGY
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2025
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IF 5
Mengxing Ge,Maimaitijiang Mamuti,Deqiao Xie,Yun Ye,Youwen Yang,Huixin Liang,Yang Liu,Xinghai Ning,Zongjun Tian
In recent years, additive manufacturing of biodegradable composite ceramics has attracted widespread attention. This study explores the vat photopolymerization (VP) of Ca 3 (PO 4 ) 2 / MgO composite ceramics, investigating the VP slurry and the effects of material composition and light-curing parameters on the monolayer curing depth and excess curing width of the green body. When the curing parameters are consistent, the monolayer curing depth of the Ca 3 (PO 4 ) 2 group, composite group, and MgO group samples decreases successively. Whereas, the excess curing width sequentially increases. When the material is the same and the exposure energy is constant, the impact of exposure time on monolayer curing depth is higher than that of exposure intensity. Regarding excess curing width, the situation is completely reversed. This research serves as a reference for the development of composite ceramic slurries and the process of photopolymerization, providing theoretical guidance for controlling the precision of subsequent photopolymerization shaping.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Chuang Wang,Weiyu Zhu,Gang Zhou,Yang Wang,Chi Chen,Xu Li,Zaiqin Zhang
Epoxy resins are widely used in power equipment, and due to the material as well as process requirements, multi-layer epoxy structures inevitably exist. The interlayer interface between epoxy layers, formed via secondary curing, causes a potential weak link in the material's properties. This work experimentally measures the temperature and strain at the epoxy-epoxy interface under various conditions, including the presence or absence of epoxy and differing chemical doses of curing agent . Subsequently, an epoxy-epoxy interface strain resin simulation model is established to examine the mechanism of interface stress formation by exploring the curing kinetics of epoxy resins using the Straink method. Experimental measurements and simulation calculations reveal the presence of an interaction between interlayer interfaces during the secondary curing. Changing the dose of curing agent in the post-pouring layer can change the interaction between the layers and regulate the interlayer interface performance.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2023
·Vol. 35
·期 49
·2304430
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IF 29.4
Xianmei Huang,Shuqiang Peng,Longhui Zheng,Dongxian Zhuo,Lixin Wu,Zixiang Weng
Elastomers prepared via vat photopolymerizationus ually exhibit unsatisfied mechanical properties owing to their insufficient growth of molecular weight upon UV exposure. Increasing the weight ratio of oligomer in the resin system is an effective approach to enhance the mechanical properties, yet the viscosity of the UV-curable resin increases dramatically; this hinders its printing. In this study, a linear scan-based vat photopolymerization (LSVP) system which can print high-viscosity resins is implemented to 3D print the oligomer-dominated UV-curable resin via a dual-curing mechanism. A polyurethane methacrylate blocking oligomer is first synthesized and then mixed with a commercialized bifunctional oligomer, photoinitiator, and primary amine as a chain extender to prepare high-viscosity UV-curable resin for the LSVP system. The deblocked isocyanate is further crosslinked with a chain extender via thermal treatment to construct a highly entangled polymer chain network. The optimal thermal treatment parameters are investigated, and the resilience of the 3D-printed elastomer is evaluated through continuous tensile loading and unloading tests. Subsequently, complex structured elastomers are printed, exhibiting favorable mechanical durability without defects. The results obtained from this work will provide a reference for preparing elastomeric devices with excellent physical properties and expand the application scope of vat photopolymerization to new fields.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 136
·期 14
·47310
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IF 1.901
Xiaoyong Zhang,Jinmei He,Lipei Yue,Yongping Bai,Huihui Liu
The development of adhesive tapes that can be applied at high temperature is a major challenge for pressure-sensitive adhesives (PSAs). To date, the heat resistance of PSAs has not been investigated in sufficient details. In this study, based on the relationship between curing structures and properties, a series of acrylic PSAs with excellent heat resistance were prepared. Commercial zirconium acetylacetonate (ZrACA), desmodur L75 (L75), and N , N , N ′, N ′-tetrakis(2,3-epoxypropyl)- m -xylene-α,α′-diamine (GA240) were employed as heat-curing agents. Trimethylolpropane triacrylate (TMPTA) was used as ultraviolet (UV)-curing agent to form semi-interpenetration polymer network structures after UV exposure. The influences of different curing agents on the thermal stability, adhesion performance, gel fraction, and viscoelastic of PSAs were explored. The results showed that the PSAs cured by L75, GA240, and TMPTA exhibited excellent heat resistance. Especially, when the content of L75 was 1.0 wt %, the PSAs could be peeled off substrate without residues on substrate surface after treatment at 170 °C for 4 h, while the nonmodified acrylic PSAs possessed residues after treatment from 110 °C. The cured PSAs adhesive performance was evaluated showing maximum 180° peel strength of 16.7 N/25 mm comparable to current PSAs. These resulting PSAs showed high heat resistance and they are suitable for a broad range of special fields. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47310.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 136
·期 17
·47428
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IF 1.901
Zhihao Liang,Xiaomei Wang,Liangting Feng,Xuefen Wu
A novel solder resist ink for inkjet printing containing the ultraviolet (UV) and thermal dual curing oligomer is introduced in this work. Three kinds of acrylic monomers for the synthesis of the oligomer are successful prepared and their structures are determined by Fourier transfer infrared. Both UV curing process and thermostability are monitored under UV differential scanning calorimetry and thermogravimetric analysis. For the photoreaction process, the oligomer using Lauryl methacrylate as the material of copolymerization possesses the highest reactivity and conversion of carbon–carbon double bond. Besides, this kind of oligomer also owns excellent thermostability, just losing 5.9% of its weight at 288 °C. The solder resist inks containing the oligomers and jetting by the inkjet printer are tested with the adhesion, soldering resistance, and other performances, presenting the outstanding heat resistance and wide application prospects. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47428.
研究领域:
材料科学
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聚合物化学
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Qianshun Cui,Tongcai Wang,Guangshuai Gu,Rihan Zhang,Tingting Zhao,Zhifeng Huang,Gong Wang,Fei Chen
The establishment of a lunar base is crucial for lunar studies, resource extraction, and advancement in deep space exploration . Considering the limitations of rocket capacity and Earth-Moon transportation costs, lunar regolith is regarded as the most practical material for lunar base construction. Consequently, the in-situ additive manufacturing technology for simulated lunar regolith has been widely studied in recent years. This paper proposes a novel additive manufacturing approach for lunar regolith simulants. The simulants and several resins were mixed into a paste with high simulant content of 86 wt%, which was suitable for extrusion-based additive manufacturing process . To fully leverage the lunar environment , the feasibility of the ultraviolet (UV) and thermal curing of the resins was first verified, which was followed by the validation of the lunar regolith paste with the solid content of 86 wt%. After the characterization of the ultraviolet and heat curing properties, the paste was further 3D printed via the extrusion-based device. The extruded paste underwent preliminary curing in a UV environment and was then heated to approximate the daytime lunar conditions, achieving complete curing of the printed component. The cured parts exhibited a compressive strength of 9.83 ± 1.07 MPa, meeting the requirements for infrastructure construction in the low-gravity lunar environment. This work offers significant implications for future in-situ construction on the Moon using extrusion-based additive manufacturing of lunar regolith.
研究领域:
材料科学
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航天工程
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建筑技术
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产品关联
DOI
高影响因子
Polymers
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2024
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IF 4.7
Jinyu Zhang,Dezhi Qu,Shuyu Wang,Shien Qi,Huajiang Zuo
In this study, polyacrylic acid hydrogels were prepared by modulating the cross-linking agent mass ratio using UV and heat curing methods. The structures and properties of the hydrogels were characterized and analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The results showed that the mechanical properties of the hydrogels prepared through UV curing were better than those prepared through heat curing. The maximum mechanical tensile strength of 139 kPa was achieved at a cross-linking agent mass ratio of 3.85% with 20 min of UV curing, and the maximum mechanical compressive strength of 0.16 MPa was achieved at a cross-linking agent mass ratio of 2.91% with 20 min of UV curing. However, the hydrogels prepared by heat curing had a higher tensile strength than those prepared using the heat curing method. In addition, the thermally cured hydrogels had higher water absorption and adsorption properties. Moreover, the PAA hydrogels prepared at cross-linking agent mass ratios of 1.91 and 2.91% with 2 h of the heat curing method had the best swelling properties. Moreover, the increase in the cross-linker mass concentration led to a decrease in the pore size and porosity and to a more compact structure.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 42
·14886-14894
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IF 7.059
Chao Huang,Jinhui Li,Deliang Sun,Rui Xuan,Yuying Sui,Tingyu Li,Liang Shang,Guoping Zhang,Rong Sun,Ching Ping Wong
Over the last few years, low-temperature curing polyimide (PI) has turned out to be a significant target for the advanced electronic package. Although the curing accelerators have been confirmed to be capable of significantly decreasing the curing temperature, their effects on properties have not been comprehensively examined. In this study, polyamide acid is synthesized by pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA), and the process of low-temperature imidization is investigated by introducing six accelerators, i.e., quinoline (QL), isoquinoline (IQL), 2-methyl quinoline (2-QL), 4-methyl quinoline (4-QL), 8-methyl quinoline (8-QL), as well as 5,6,7,8-tetrahydroquinoline (THQL). As revealed from the results, the polyimide films formed using 4-QL and QL have exhibited prominent mechanical, thermal, and electrical properties. For the PI-4-QL, the tensile strength is 151.87 MPa, elongation-at-break reaches 161.36%, and the weight loss of 5% is observed at 533 °C; for the PI-QL, the tensile strength is 134.82 MPa, elongation-at-break reaches 145.16%, and the weight loss of 5% reaches 545 °C. As indicated from the results, the boiling point, acidity and molecular structure of the low-temperature curing accelerators show significant effects. Lower acidity and steric hindrance between the accelerator and amide bond facilitate the low-temperature imidization of polyamide acid. Furthermore, the as-prepared low-temperature cured PIs of 4-QL and QL would exhibit wide applications in advanced packaging industry.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Applied Engineering Materials
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2025
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IF 3.5
Ximing Zhong,Yue Hong,Wenchao Min,Chao Chen,Guowei Liang,Xizhi Zhang,Hua Xu,Hongjun Zhou,Xinhua Zhou
In this work, a biobased cationically photocurable omniphobic coating system was effectively developed via a facile strategy by using epoxidized soybean oil as a biomass coating precursor, tetrakis [(epoxycyclohexyl) ethyl] tetramethylcyclotetrasiloxane as an effective cross-linking agent, and polydimethylsiloxane as an omniphobic agent to provide coatings with low surface energy. Due to the rational design of this coating system, no extrinsic organic solvent was added, and 20 s ultraviolet radiation was sufficient for coating curing. The as-prepared omniphobic coatings were highly optically transparent and mechanically robust, and they also possessed exceptional liquid repellency and chemical shielding durability against various contaminants and corrosive agents. Besides, these coatings exhibited remarkable self-cleaning performance and also could be appropriately used for anti-ink, antigraffiti, and antifingerprint purposes. In addition, they could be applied for fabricating functional noctilucent coatings and bestowed them with an omniphobic property. More strikingly, this coating system could be cured via sunlight exposure without compromising the omniphobic property, enabling these coatings to be availably applicable for various substrates, including the thermosensitive ones. Therefore, the features of facile preparation, short curing duration, and optional curing strategy, in addition to above versatile functions, make these biobased omniphobic coatings tremendously promising for practical applications.
研究领域:
材料科学
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表面工程
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高分子化学
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应用化学
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产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2022
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IF 4.966
Fuping Bian,Xiaoquan Li,Jihe Zhao,Xuefeng Gui,Jiwen Hu,Shi Li,Shudong Lin
Ultraviolet (UV) photocuring technology has gained importance in crosslinking of polymers, as it allows fast curing rate, low energy consumption and no volatile organic compounds (VOCs). However, the photopolymerization of very thick films and in shadow areas where the light penetration is inhibited (e. g. in filled, pigmented, dispersed samples) remains a huge challenge. As reported herein, a simple hydrosilylation reaction was employed to synthesize epoxy-based silicone prepolymers . Firstly, the structures of the synthesized epoxy-based silicone prepolymers were characterized by Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance ( 1 H NMR) spectroscopy techniques, thus confirming the successful synthesis of these prepolymers. The epoxy group of prepolymers could be crosslinked under UV irradiation , and its silicone methoxy group (-SiOCH 3 ) was condensed under moisture ambient, so as to acquire both thick coatings and pigmented coatings due to the dual-curing approach. Moreover, water droplets exhibit water contact angles between 103° and 108° on these coatings, and surface energies of the these coatings are from 25.27 to 22.67 mN/m. The transparency of these coatings is over 90%. They remain stable at temperatures reaching up to 332.2 to 344.8 °C, thus demonstrating that they have excellent heat resistance. The coatings exhibited good mechanical properties with a tensile strength >4.57 MPa. Finally, the coatings have good anti-smudge and anti-fingerprint properties, and the overall results show that these films have potential applications as anti-smudge coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELASTOMERS AND PLASTICS
·
2013
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IF 0.623
Aijie Ma,Qiuyu Zhang,Hepeng Zhang,Youqiang Shi,Yu Liu
2-Phenylimidazole (2-PZ) and polymethyl acrylic glycidyl ester (PGMA) are performed to fabricate a novel microcapsule latent curing agent of 2-PZ/PGMA by solvent evaporation method with 2-PZ as the core material and PGMA as the shell material. A novel single-component 2-PZ/PGMA/epoxy adhesive is also prepared by mixing 2-PZ/PGMA with epoxy resin matrix. The 2-PZ/PGMA microcapsules are characterized using scanning electron microscopy and granulometer. The curing kinetics and thermal properties of 2-PZ/PGMA/epoxy resin system are also investigated using differential scanning calorimeter, Fourier transform infrared spectrometer, and thermogravimetric analysis. Results show that 2-PZ/PGMA has good sphericity and narrow diameter distribution. The curing process of the 2-PZ/PGMA/epoxy resin system contains autocatalytic mechanism. Compared with that of pure epoxy, the presence of the 2-PZ/PGMA has little effect on thermal stability for the epoxy.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2020
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IF 4.032
Peng Wang,Ming Liu,Qichao Ran
Based on the weight loss and small molecule volatiles released during the thermal curing process of three kinds of benzoxazines , bisphenol A/aniline type benzoxazine (BA-a), p-cresol/diamine type benzoxazine (MPH-mda) and 2,4-xylenol/4,4′-methylenebis-(2,6-diisopropyl) aniline type benzoxazine (DMPH-mdpa), their curing mechanisms and the weight-loss mechanisms were studied. The weight-loss ratios and structure changes of these benzoxazines during the curing process were studied by weighing method, Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The volatiles released from these benzoxazines during different curing stages were collected by a self-made experimental device. The structures of these volatiles were characterized by FTIR and proton nuclear magnetic resonance spectroscopy ( 1 H NMR). The results showed that the mixtures of imine , triazine , aniline and Schiff base were released from the cracking of the intermediate during the thermal curing of BA-a. Compared with BA-a, the weight loss of MPH-mda was smaller, and its volatile was a small amount of stable diamine type Schiff base. For DMPH-mdpa, because all active reaction points on benzene ring were occupied by alkyl groups , it cannot form effective polymer structures after ring-opening reactions, which led to that DMPH-mdpa had the most weight loss during the curing process, and mainly generated phenol type volatiles.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）