ADVANCED MATERIALS
·
2023
·Vol. 35
·期 49
·2304430
·
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
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yuewei Li,Ranjith Kumar Kankala,Zixiang Weng,Lixin Wu
Stereolithography (SL), often referred to as an advanced manufacturing technique, is employed to conveniently fabricate bulk and delicate objects with UV-curable resin due to its high accuracy and versatility. However, the poor performance exhibited by UV-curable resin limits the practical applicability of SL. In this study, the acidified vapor-grown carbon nanofibers (VGCFs)-supplemented dual-cure 3D-printed SL resin nanocomposites are prepared by a facile method to avoid non-homogeneous curing and improve the overall performance of the printed workpieces effectively. The dual-cure nanocomposites with 1% w/w VGCFs exhibit a tensile strength of 63.5 MPa, which is improved by 10% over pure resin, and Young’s modulus of 3.2 GPa increases up to 19% with the addition of 2% w/w VGCFs. As confirmed by nanoindentation tests, the apparent homogeneity of nanocomposites is achieved by using the dual-cure method. Moreover, these nanocomposites exhibit excellent thermal properties, revealing that they could be conveniently employed in a high-temperature environment. Notably, the thermal conductivity of the nanomaterials supplemented with 2% w/w VGCFs is increased by 79%. Together, these nanocomposites by SL with enhanced mechanical properties, thermal resistance, and thermal conductivity could open a broad range of high-end applications, such as mold manufacturing, aerospace, and electronic-based devices.
研究领域:
材料科学
·
先进制造
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 17
·7887-7898
·
IF 2.302
Lian Qingsong,Li Yan,Yang Tao,Li Kai,Xu Yifen,Liu Liang,Zhao Jingbo,Zhang Junying,Cheng Jue
Allyl-based epoxy resin/Sulfur (S) system is a facile and novel dual-curing system which conducts a unique curing mechanism. In this paper, Bisphenol-A diglycidyl ether (BADGE) and 2-Allylphenol (OAP) cured by S were comparatively investigated to clarify the dual-curing mechanism of Epoxy (EP)/Allyl Compound (AC)/S system. When the temperature was above 170 °C, DSC and FTIR data showed that S could cleave to form thiyl radicals, and FTIR, NIR, and 1 H NMR measurements proved the disappearance of allyl groups and the generation of thiol groups by the thiyl radicals abstracting α-H atoms of allyl groups in the OAP/S reaction system. Real-time infrared spectroscopy (RT-FTIR) results showed that the
reaction of the generation of thiol groups is the dominant reaction in the two possible pathways of the OAP/S system; allyl groups and epoxy groups disappeared sequentially in the OAP/S/BADGE system. DSC curve also revealed the one-stage reaction for OAP/S system and two-stage reaction for OAP/S/BADGE system. These data were used to develop a detailed, experimentally validated pathway for the dual-curing of EP/AC/S system, in which thiol groups are important intermediate, and the dual-curing process included the crosslinking of double bonds that initiated by thiyl radicals and the ring-opening reaction of epoxy groups with thiol groups. Besides, the dual-curing mechanism of EP/AC/S system shares a close resemblance to the classical rubber vulcanization mechanism and the recent thiol-ene radical addition mechanism.
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
MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Tong Zhang,Bo Jiang,Yudong Huang
In this work, three hyperbranched polysiloxanes with methacrylate (HSiM), epoxy (HSiG) and methacrylate/epoxy groups (HSiMG) were prepared through the hydrolysis of γ-glycidoxypropyltrimethoxysilane (γ-GPS), γ-methacryloxypropyltrimethoxysilane (γ-MPS) and their binary blends. The results indicated that methacrylate groups could accelerate the condensation reaction, thus producing more branching sites with a branching degree of 0.67 for HSiMG. In addition, the effects of terminal groups on the microstructural and thermal properties of the post-cured hyperbranched polysiloxanes were evaluated. Consequencely, the UV-cured HSiM produced more cracks at a higher temperature due to a tighter crosslinked structure. The thermal-cured HSiG decomposed at a lower temperature. While the dual-curing PHSiMG had a more stable structure and relatively excellent thermal stability, based on sequential free-radical photopolymerization and epoxy anionic polymerization . Thus, this work provides a promising approach for structural design and optimization of the polysiloxane.
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 Coatings Technology and Research
·
2017
·Vol. 15
·期 1
·149-158
·
IF 1.557
Yao Bolong,Zhao Haiping,Wang Likui,Liu Yun,Zheng Chunsen,Li Hongping,Sun Changqing
A dual-cure hydrophilic acrylate polymer was synthesized via radical polymerization with acrylic acid (AA), isophorone diisocyanate (IPDI), 2-acrylamide-2-methylpropane sulfonic acid (AMPS), hydroxyethyl acrylate (HEA), and 3-(trimethoxysilyl)propyl-2-methyl-2-methacrylate (MPS) as monomers, then used as prepolymer for antifog coating with tetraethylorthosilicate (TEOS) as a novel crosslinker. The prepolymer was mixed with crosslinking agent and photoinitiator to form coating formulas. The coating was characterized by nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR) spectroscopy, and contact angle measurements. The results indicated that the dosage of AMPS and TEOS had great influence on the antifog performance. With an increasing TEOS amount, the hardness, adhesion, water resistance, impact resistance, and thermal stability of the films were improved, at the expense of transparency; with increasing dosage of AMPS, the hydrophilicity of the film increased at the expense of water resistance. Optimum coating properties could be obtained when the amount of AMPS was 7% and that of TEOS was 5.5%. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) results showed that some SiO 2 microspheres were formed and microphase separation occurred between the macromolecular segments, yielding the excellent coating properties.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Shuqiang Peng,Yifan Xu,Yuheng Wang,Laiwen Cai,Zesheng Guo,Xianmei Huang,Weiqiang Chen,Longhui Zheng,Xiangfang Peng,Lixin Wu
Vat photopolymerization (VPP) 3D printing has emerged as a transformative method for fabricating structurally tailored stretchable ionic conductors. However, developing hydrophobic ionic conductive elastomers (ICEs) that simultaneously achieve high electrical performance, mechanical robustness, and environmental stability remains challenging. Herein, we present a photothermal dual-curing strategy to overcome this limitation by integrating a dynamic hindered urea bond-functionalized blocked polyurethane acrylate with a hydrophobic ionic liquid. The photocuring process induces microphase separation, forming continuous ion-conductive pathways that achieve high ionic conductivity (5.30 mS m −1 ) at a low ionic liquid loading of 30 wt%. Subsequent thermal annealing drives the formation of high-molecular-weight polyurethane/polyurea chains, creating a dynamic crosslinking-interpenetrating network that synergistically enhances tensile properties and resilience (tensile strength of 3.0 MPa, elongation of 1036 %, and 0.5 % residual strain at 50 % deformation). The resulting ICEs exhibit outstanding hydrophobicity (water contact angle: 112.3°) and anti-swelling stability. Using VPP 3D printing, we fabricate high-resolution architectured ICEs as sensors for real-time monitoring of finger movements and as soft actuators for underwater applications. Additionally, ICEs-based triboelectric nanogenerators with microstructured surfaces demonstrate stable and enhanced voltage output. This work establishes a universal paradigm for designing high-performance ICEs via additive manufacturing, advancing their applications in aquatic sensors and self-powered systems.
研究领域:
材料科学
·
柔性电子
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Nan Zheng,Xuan Zhang,Xin Min,Jie Liu,Wenge Li,Xiaohui Ji
A novel robust and flexible superhydrophobic fluoropropyl methylsiloxane-dimethylsiloxane multi-block copolymer containing methacryloxyl group was synthesized via ring-opening polymerization, followed by macromolecular modification using 3-(trimethoxsilyl) propyl methacrylate (TMPMA). The propionyloxy group of MAc(PTFMS- alt -PDMS) could be crosslinked under UV irradiation , and its silicon methoxy group (-SiOCH 3 ) was simultaneously condensed under moisture ambient, so as to acquire both higher crosslink density and adhesion strength duo to the dual-curing mode. After coating and curing MAc(PTFMS- alt -PDMS) on the surface of cotton fabric, a robust superhydrophobic elastomer coating was obtained. The elastomer exhibited excellent mechanical properties with a tensile strength >4.0 Mpa and an elongation at break >300%. Moreover, the elastomer exhibited superhydrophobic properties (contact angle CA > 150 o ) and good adhesion properties (shear strength >3.7 Mpa) on various inorganic and organic substrates such as steel, glass, paper, and polyethylene (PE) films, with the assistant of the hydrophobic silica particles. The excellent flexibility and adhesive strength of the MAc(PTFMS- alt -PDMS) allowed a PE film to be bent at a large angle (120 o ). The results obtained here demonstrate that this material has good application prospects where flexible superhydrophobic coatings are desired.
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
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wei Chang,Kangkang Guo,Chaoen Jin,Bin Chen,Huimin Qi
Light-based three-dimensional (3D) printing technologies are regarded as one of the most promising manufacturing methods. However, 3D printed objects based on free radical polymerization have disadvantages such as anisotropy, poor mechanical strength, and heat resistance and cannot meet the requirements of high-performance applications. This study reports a class of acryloyl-functional benzoxazine exhibiting excellent mechanical properties, heat resistance, and flame retardancy. 3-Acryloyl-3,4-dihydro-2H-1,3-benzoxazine (Ph-am) and bis(3-phenyl-(3-acryloyl-3,4-dihydro-2H-1,3)-benzoxazine) (Ba-am) have been synthesized by the Mannich reaction using acrylamide as the amine source. The acryloyl-functional benzoxazine was printed by a DLP printer. Then, the oxazine ring undergoes ring-opening polymerization under a high temperature to form a dense polymer, enabling the printed object to exhibit isotropy. The Mannich bridge and hydrogen-bond structure in polybenzoxazine enhance the mechanical properties and thermal resistance of printed objects. The glass-transition temperature (Tg) and tensile strength of dual-cured Ph-am reach 270 °C and 116.55 MPa, respectively. Meanwhile, after blending modification with tris(2-hydroxyethyl)-isocyanurate triacrylate, hybrid polymer networks have been formed. The tensile strength and Young’s modulus of dual-cured P8B2T1 reaches 130.89 MPa and 6.45 GPa, respectively. Moreover, the dual-cured P8B2T1 shows good flame retardancy. This high-performance photosensitive resin has great potential in fields such as aerospace, automotive, and electronics.
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
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2020
·
IF 2.671
Yongxia Ren,Yunsheng Dong,Ruoning Yang,Youwei Yao
Ultraviolet (UV)/thermal dual-curable polyurethane acrylate (PUA) mixtures were prepared using a PUA oligomer , tripropylene glycol diacrylate (TPGDA), benzoyl peroxide (BPO), 2,4,6-trimethylbenzoyldiphenyl phosphine oxide (TPO), and cobalt isooctanoate. For purposes of comparison, a UV-curable PUA mixture was prepared by mixing the PUA oligomer, TPGDA, and TPO. When placed under a UV lamp (400 W, 50 mW/cm 2 ), the surface drying time of each curable mixture was approximately 2 s. The content of volatiles during UV curing (the intensity of the lamp was 100 mW/cm 2 ) was less than 0.3 wt%, and the content of potential volatiles (the test condition was heating at 110 °C for 1 h after UV curing) was below 1.0 wt%. Compared with the UV-cured sample, the UV/thermal dual-cured sample containing cobalt isooctanoate had more favorable properties, that is: (1) better acid and alkali resistance; and (2) better thermal stability and higher gel content. The temperature at 5 wt% weight loss ( T 5wt.% ) and the gel fraction of the UV-cured sample (the curing condition was 1 min of UV irradiation) were 269.4 °C and 94.6%, respectively. The T 5wt.% and the gel fraction of the UV/thermal dual-cured sample (cured at 100 °C for 10 min after 1 min of UV irradiation) were 318.2 °C and 99.8%, respectively. BPO and cobalt isooctanoate had little effect on the surface drying rate of the curable mixtures, and the performance of the cured samples was improved by thermal treatment following irradiation with UV. Considering the dyeing effect of BPO, this system provides a more practical approach to the complete curing of colored UV-curable resins.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Zhisen Shen,Yidong Wu,Shijie Qiu,Hongxia Deng,Ruixia Hou,Yabin Zhu
UV-cured materials with antibacterial and degradable functions have a wide range of applications, especially in the biomedical field. Herein, a series of UV-cured materials have been prepared based on 2-(methacryloyloxy) ethyl acetoacetate (EAM), poly (ethyleneglycol) dimethacrylate (PM) and poly (propylene glycol) bis (2-aminopropyl ether) (D230) at different ratio via UV-thermal dual curing technique. The curing behaviors of these UV-curing systems were monitored by flourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The thermal-mechanical and coating properties of these UV-cured materials were investigated in detail. The results revealed that the various properties of these UV-cured materials could tuned by varying the contents of PM and D230. In addition, the degradable and antibacterial properties of these UV-cured materials were also studied. Notably, these UV-cured materials possessed good degradable and antibacterial properties. They showed great potential for applications the biomedical field.
研究领域:
材料科学
·
生物医学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chuanwei Lu,Yupeng Liu,Chunpeng Wang,Qiang Yong,Jifu Wang,Fuxiang Chu
Developing lightweight and high-strength biomass derived multi-functional thermosets are of major interest and challenge. In this study, an integrated strategy was carried out to convert soybean oil, furfural, cardanol and turpentine into multi-functional thermosets. Firstly, the modified epoxidized soybean oil (ESOM) bearing epoxy and maleimide group was synthesized, which could perform step-growth polymerization and Diels-Alder reaction for the formation of dual-cure network. Secondly, a bio-based curing agent (CFMA) derived from furfural, cardanol and 1,8-p-menthane-diamine was synthesized by one step Mannich reaction. Then the dual curing reaction of CFMA and ESOM were applied to form sustainable and toughened epoxy thermosets with dual-cure network. In this integrated strategy, the epoxy thermosets inherited and fused the unique properties of each biomass resource. Moreover, the biomass content in the thermoset was above 89.0%. The formation of dual-cure network significantly enhanced the mechanical strength and toughness of the epoxy thermosets, and the mechanical properties could be easily tailored by changing the mass ratio of CFMA/ESOM or adjusting the curing time. Particularly, those epoxy thermosets showed a great potential application as a photothermal conversion coating with excellent photothermal conversion property, and the photothermal conversion efficiency was 45.0%. This work provides an efficient approach towards sustainable and intelligent epoxy thermoset materials.
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
POLYMER
·
2022
·
IF 4.432
Jie Liu,Pengcheng Miao,Wenwen Zhang,Guanjun Song,Jiale Feng,Xuefei Leng,Yang Li
Interpenetrating polymer networks (IPNs) are a non-bonded combination of two or more cross-linked polymers and have superior mechanical properties. Herein we synthesized a series of IPNs by a sequential UV-thermal dual-curing method, which is consisted of UV curable resin network and polyurethanes (PU) network. Blocked isocyanate (BI), polyols , and UV curable resin solutions were mixing completely, the resulting mixture was exposed to UV light to obtain a single network. Then the double network was formed via thermally triggered reaction of deblocking-isocyanate and polyols . The effect of polyol hydroxyl number (from two to six) on properties of IPNs was systematically studied. The results exhibit that pentaerythritol as polyol can be dual-cured by UV and heating to give the highest tensile strength (17.5 MPa), of a 21% increase compared to unheated sample. Furthermore, a series of semi-interpenetrating networks (semi-IPNs) were obtained by using polytetramethylene ether glycol (PTMEG) instead of the polyols. The results showed that introducing interpenetrating or semi-interpenetrating networks exhibit improved mechanical properties of the UV curable resin. Besides, the deblocking temperature of BI is just appropriate for the 3D-printing temperature.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）