JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 10
·
IF 1.768
Jianquan Tan,Weiqu Liu,Honglei Wang,Yang Sun,Shijian Wang
A novel macromonomer containing fluorinated units (PHFBMA-GMA) was synthesized through a two-step procedure: firstly, hexafluoro-butyl methacrylate (HFBMA) was polymerized in the presence of functional chain transfer agent 3-mercaptopropionic acid (MPA) and then the carboxyl acid group terminated polymer was end-capped with glycidyl methacrylate (GMA). Chemical structures of PHFBMA-GMA were characterized by gel permeation chromatography, fourier transform infrared spectroscopy (FTIR), and 1 H nuclear magnetic resonance (NMR). Subsequently, PHFBMA-GMA was employed as reactive surface additives added into UV-cured polyacrylate to modify UV-curable coatings. It is convenient to control the tail length of the fluorinated segments in this study by adjusting the ratio of initiator and chain transfer agent. The influence of both the concentration and the molecular weight of PHFBMA-GMA on the surface properties of UV-cured films was investigated. With increasing both the concentration and the molecular weight of PHFBMA-GMA, the surface energy of the UV-cured films decreased. X-ray photoelectron spectroscopy was employed to characterize and quantify the surface composition and the results confirm the enrichment of fluorinate atoms on the surface. Moreover, the physical properties of UV-cured films, such as gel content, water absorption, pencil hardness, adhesion, chemical resistance, mechanical properties, optical transmittance, and thermal properties, were also investigated in detail. The novel macromonomer was economical but effective to modify the properties of the UV-curable coatings. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43116.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Te Hu,Huijian Ye,Zhenggang Luo,Junjie Ma,Boyuan Zhang,Xuanhe Zhang,Jinwei Song,Qingping Wang,Lixin Xu
The use of stabilizer with designer structures can effectively promote graphite exfoliation in common solvents to render functionalized graphene desirable for their various applications. Herein, a hyperbranched polyethylene copolymer , HBPE@Py@Acryl, simultaneously bearing multiple pyrene terminal groups and pendant acryloyl moieties has been successfully synthesized from ethylene with a Pd-diimine catalyst based on unique chain walking mechanism. The unique structural design of the HBPE@Py@Acryl makes it capable of effectively promote graphite exfoliation in a series of common, low-boiling-point organic solvents , e.g. CHCl 3 , to render stable graphene dispersions with concentrations effectively adjustable by changing feed concentrations of graphite and polymer or sonication time. Meanwhile, it can be irreversibly adsorbed on the exfoliated graphene surface based on the π-π interactions between them to concurrently render acryloyl-functionalized graphene free of structural defects, with majority (92.7%) of them having a thickness of 2–3 layers. This allows us to obtain graphene electrothermal films simply by filtration and UV irradiation, which exhibit outstanding stability in use. The action mechanism of the HBPE@Py@Acryl as stabilizer for promoting graphite exfoliation and the role of UV irradiation on improving the stability in use of resulting graphene films have been elucidated.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Bio Materials
·
2021
·
IF 0
Gaoyan Xiong,Wenjuan Xiong,Siwen Dai,Mei Lin,Guozheng Xia,Xiaobo Wan,Youbing Mu
The development of functional materials based on renewable resources is of great significance in today’s resource shortage. Here, we present an effective way to synthesize a mussel-inspired adhesive from acrylated epoxidized soybean oil (AESO), a renewable and commercially available small molecular material with a molecular weight around 1200 Da, by a one-step esterification reaction with the affordable 3,4-dihydroxybenzoic acid (DHA). By taking advantages of both the double bond and the catechol moiety presented in this small molecular adhesive, a short curing time was achieved with UV irradiation. An average bonding strength around 1.4 MPa at a curing time of only around 10 min on a glass substrate was observed, which reached 3.1 MPa (average 2.8 MPa) at a curing time of 2 h under ambient conditions. The curing time is much shorter, and the bonding strength is obviously stronger than the conditions where conventional oxidation agents such as IO4– or oxidation/coordination agents such as Fe3+ are used as the curing agent. Furthermore, the AESO-g-DHA can be used as an underwater adhesive, and an appreciable bonding strength up to 0.64 MPa was observed, which is superior than most of currently known commercialized glues. Given that the adhesive could be synthesized from low-cost renewable resources in one step, it might be a potential candidate for large-scale practical application.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
MACROMOLECULES
·
2022
·
IF 6.057
Hongxin Yao,Yiye Song,Wenyan Huang,Li Jiang,Qimin Jiang,Xiaoqiang Xue,Bibiao Jiang,Hongjun Yang
Hydrogen transfer polymerization (HTP) of vinyl monomers with active protons has resulted in heterochain polymers with attractive biodegradability and biocompatibility, which should enable it to be one of the most promising synthetic techniques. However, the molecular weight of the resultant polymers from HTP has been shown to be rather low, such that the products have nearly no practical application. The present work focuses on employing HTP to synthesize high-molecular-weight polymers and preparing biomaterials with good mechanical properties. Detailed investigations into the polymerization process suggested that introducing a small amount of diolefin and catalyst at the last stage of HTP of 2-hydroxyethyl acrylate (HEA) could result in a polymer with a weight-average molecular weight up to 355.8 kg/mol. During this process, diolefin worked as a coupling agent, which could both react with hydroxyl groups by oxa-Michael addition and combine with double bonds through Rauhut–Currier (RC) reactions. The resultant polymer exhibited abundant vinyl bonds existing both in the middle and at the termini and hence can be directly used as a macromonomer for biodegradable materials after UV curing with microfluidic spinning. On the basis of this strategy, the copolymerization of HEA and acrylamide (Am) was conducted, and the maximum tensile strength of the product reached as high as 30 MPa with an elongation percentage of 27.8%. What is more, the corresponding materials not only showed very good degradability but also had nearly no cell toxicity, instead helping to enhance cell viability.
研究领域:
材料科学
·
生物医学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 12
·2599-2607
·
IF 4.154
Zhuang Yang,Yingwu Luo,Xiang Gao,Rui Wang
Graphical Wearable ASSLIB : In situ polymerization on the electrode can enhance the adhesion between the electrode and the electrolyte, resulting in enhanced cycle and rate performance of all-solid-state lithium-ion batteries (ASSLIBs). The development of wearable electronic devices prompts the demand for high-safety all-solid-state lithium-ion batteries (ASSLIBs), which can work at ambient temperature with comparable performance to traditional commercial lithium-ion batteries. In this work, a three-dimensional network design to overcome the contradiction between ionic conductivity and mechanical strength in polymer electrolytes is proposed. The designed solid polymer electrolyte (SPE) has the ion-conducting group (oligomeric ethylene oxide) fixed on the side chains, whereas the main chain is crosslinked polyacrylate, providing good mechanical strength. Succinonitrile (SN) is uniformly dispersed in the cross-linked network as an additive. The prepared SN−SPE shows a high ionic conductivity of 4.6×10 −4 S cm −1 at 25 °C with a Li + -ion transference number of 0.45 and an excellent electrochemical stability window up to 4.6 V (vs. Li + /Li). The preparation method allows that the electrolyte can be UV-cured in situ on the cathode to achieve a cathode-electrolyte integrated electrode, which enhances the interface contact and decreases the interface resistance. As-fabricated LiFePO 4 //Li 4 Ti 5 O 12 cathode-electrolyte integrated ASSLIBs can deliver a discharge capacity of 155.88 mAh g −1 at 0.2 C at room temperature and a capacity retention up to 93.62 % after 100 charge-discharge cycles. The reported polymer electrolyte and advanced assembly process provided a promising strategy for the wearable ASSLIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2022
·Vol. 43
·期 19
·2200327
·
IF 5.006
Zhuzuan Chen,Yuehai Peng,Zhuohong Yang,Yu Yang
Lithium–sulfur batteries (LSBs) represent a promising energy storage system due to the high theoretical energy density of the cathode; however, the high temperature and long-time drying required for electrode production result in high energy consumption and low efficiency. Ultraviolet (UV)-curing technology is an effective strategy to solve the abovementioned problems. However, carbon black and other conductive agents used in the production of the battery industry show strong absorption of UV light; thus, a single photoinitiator cannot absorb enough light intensity to realize initiation, limiting its application in the battery industry. In this work, the concept of full-band absorption is introduced into the manufacturing process of the LSB cathode to solve the abovementioned problems. The full-band absorption of photoinitiators in the UV band is successfully realized by combining the photoinitiators 2-benzyl-2-dimethylamino-1-(4-morpholinylphenyl)-1-butanone, 2-isopropyl thioxanthone, and bis (2,4,6-trimethyl benzoyl)-phenoxyphosphine. An ultraviolet in situ polymerized polyurethane acrylate (PUA) binder is successfully prepared by the combination of photoinitiators. PUA is used as the binder of LSBs and exhibits an excellent long-cycle performance of 1500 cycles with a low decay rate of 0.04% per cycle at 0.5 C. Thus, UV-curing technology provides a new prospect and possibility of industrialization for battery manufacturing.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2671-2679
·
IF 2.5
Gu Yuanchun,Liu Huaqian
Significant ultraviolet (UV) technology was used to create a new composite polymer electrolyte (CPE) membrane composed of poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), benzophenone (Bp), and varying amounts of highly ion-conducting Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles. In lithium metal batteries, the CPE membranes demonstrated improved mechanical properties as well as superior electrochemical performances. CPE-15wt% LLZTO typically demonstrated the highest ionic conductivity (σ = 3.7 × 10 −3 S/cm) at room temperature, a high Li-transference (t + = 0.79), and a wider electrochemical stability window (ESW) above 5 V, as well as good mechanical strength (8.2 MPa). More importantly, the CPE-15wt% LLZTO membrane inhibits Li dendrite expansion in Li symmetric cells and exhibits long-term cyclic stability with a current density of 3 mA/cm 2 over 1150 h for Li/CPE-15wt% LLZTO/Li. The current study demonstrates that a UV-irradiated CPE membrane can be a promising electrolyte for next-generation lithium-metallic batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2013
·Vol. 143
·期 3
·1391-1395
·
IF 2.072
Kemin Wang,Yuhui Lu,Penghui Chen,Jingsong Shi,Hongning Wang,Qiang Yu
Benzophenone (BP) is a common initiator which is often used in the UV-curing production and related fields. However, the shortcomings such as toxicity, odor, and migration always limit the development of the traditional BP photoinitiator . Polymeric benzophenone photoinitiator (PEG-BP) was synthesized basing on polyethylene glycol (PEG), succinic anhydride , 4-hydroxybenzophenone and epichlorohydrin . The structure of PEG-BP was characterized by IR and 1 H NMR. The radiation absorption of PEG-BP was detected by UV spectrophotometer with the maximum absorption wavelength at 283 nm in acetonitrile solvent, undergone significant redshift corresponding to small molecule photoinitiator BP, thus enhanced the photosensitive efficiency of UV-curing system in the long wavelength region. Besides, PEG-BP has better water solubility than BP, thus could be used in both oil and aqueous solution. The obvious advantage of this initiator was the elimination of amine based hydrogen donors and to provide alternative hydrogen donors with easily availability and non-toxicity. The effects of molecular weights of PEG-BP, photoinitiator concentration, UV-radiation intensity and different monomers on photopolymerization kinetics were investigated in detail. The synthesized polymeric photoinitiators are attractive to be used as type II photoinitiators.
研究领域:
高分子化学
·
光化学
·
材料科学
·
功能材料
·
辐射固化技术
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2017
·
IF 2.858
Xiaofeng Liao,Hongqiang Li,Lin Zhang,Xiaojing Su,Xuejun Lai,Xingrong Zeng
With the environment pollution deteriorating by industrial waste water and oil leak, superhydrophobic materials for oil/water separation have attracted more attentions and become a worldwide research hotspot. Herein, we propose a facile dipping-UV curing approach to fabricating superhydrophobic hybrid coating on polyester fabric for oil/water separation by utilizing (3-mercaptopropyl) trimethoxysilane modified graphene oxide (mGO) and vinyl-terminated polydimethylsiloxane (V-PDMS). With mass ratio of mGO to V-PDMS increasing, the roughness of the fabricated mGO/PDMS hybrid coating on polyester fabric correspondingly increased and the water contact angle (WCA) reached up to 157°, demonstrating excellent water repellency. Importantly, due to the formation of crosslinked PDMS network with mGO as crosslinking points, the fabric exhibited good thermal stability and chemical resistance. Furthermore, the superhydrophobic fabric also possessed high oil/water separation efficiency at 99.8%, and still kept at 98.4% even after 15 separation cycles. Our findings stand out as a new tool to fabricate superhydrophobic materials and coatings with graphene and its derivatives for oil/water separation, showing great potential in practical applications such as oil spill accidents and industrial sewage emissions.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
表面化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Qian Wu,Yun Yang,Chenchong Ma,Zheng Chen,Qinting Su,Caizhen Zhu,Yuan Gao,Rui Ma,Cuihua Li
The inherent safety issues of commercial organic liquid electrolytes make it hard to deploy them in lithium metal batteries. By contrast, nanocomposite polymer electrolytes (NCPEs) can not only suppress the growth of lithium dendrites but also have the functions of separators to substitute the liquid electrolytes. In this work, a kind of NCPE was designed by in situ hydrolysis of tetrabutyl titanate to form in situ TiO2 nanoparticles throughout the UV curing cross-linked polyurethane acrylate network, and the addition of an ionic liquid as a plasticizer further enhanced the safety property of the NCPE due to its intrinsic excellent thermal stability. The optimized NCPE-4 sample shows a high ionic conductivity of 1.1 × 10–3 S cm–1 at 30 °C, a sufficiently stable interface compatibility between the NCPE and electrode, and a higher electrochemical stability window of 4.8 V (vs Li/Li+). More interestingly, the assembled LiFePO4/NCPE-4/Li coin cell attains a discharge capacity of 149.1 mA h g–1 after 200 cycles at 0.5 C, and even at the high rate of 3 C, the capacity still stays over 83 mA h g–1. These results demonstrate that the novel NCPE-4 could be a promising candidate for the practical applications in lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Kehang Li,Zhe Zhao
Stereolithography (SLA) has been regarded as the most promising rapid prototype (RP) production method for ceramic parts recently because of its better precision in size and site control. The rheological behavior and curing behavior of suspensions are controlling factors for ceramic stereolithography. In this work, oleic acid (OA), stearic acid (SA) and Poly(Acrylate Ammonium) (PAA-NH 4 ) were studied as the surfactant for HDDA-based suspension formulation. Modified alumina particles exhibit different wettability with HDDA monomer and thus the different rheology behavior and stability between the formulated suspensions. OA shows the best performance among all three dispersants . 40 vol% alumina suspensions with a viscosity ˂3 Pa s at 30 s −1 shear rate were successfully formulated with OA and SA. A sintering density of 95% can be reached for the OA- and SA-modified alumina UV-curable resins.
研究领域:
材料科学
·
陶瓷
·
三维打印
·
高分子化学
·
表面化学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yuxin Fu,Yugang Huang,Runsheng Huang,Haojie Zhang,Rui Zhan,Jianwen Yang
To reduce the limitations of traditional polyimides (PIs), such as poor processability, limited flexibility, and low solubility, a series of siloxane-modified photosensitive PIs (PSPIs, designated as D1∼D6) were designed and synthesized. The cured films of these PSPIs were prepared by UV irradiation. In comparison to conventional PIs, the cured films exhibited good heat tolerance, enhanced flexibility, and a lower glass transition temperature. Some films demonstrated very good mechanical properties, low dielectric characteristics, and excellent hydrophobicity, with a maximum tensile strain of 66%, a low dielectric constant as low as 2.7, a high surface contact angle of 113°, and a minimal moisture absorption as low as 0.02%. These cured films hold great potential for applications in packaging and solder mask protection for high-frequency, high-speed printed circuit boards (PCBs).
研究领域:
材料科学
·
高分子化学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）