JOURNAL OF POLYMER RESEARCH
·
2013
·Vol. 20
·期 7
·1-11
·
IF 2.019
Cheng Chuanjie,Bai Xiongxiong,Liu Shaojin,Huang Qinghua,Tu Yuanming,Wu Haiming,Wang Xiaoji
A cardanol-derived reversible addition-fragmentation chain transfer (RAFT) agent was synthesized in 57 % total yield, and a cardanol-based anionic surfactant was also facilely prepared. Emulsion polymerization of methyl methacrylate (MMA) was realized to form a cardanol-terminated PMMA polymer by using the novel RAFT agent as well as the cardanol-based anionic surfactant. To improve the properties of cardanol-terminated PMMA as a material, UV-curing was performed. According to the comprehensive behavior of the UV-cured resins, optimal irradiation time was 20 min.
研究领域:
材料科学
·
高分子化学
·
可持续化学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Li Fan,Qiuxia Peng,Wen Yuan,Xian Li,Huan Hu,Jiajun Ma,Yawen Huang,Junxiao Yang
Low dielectric UV-curable resins are compatible with photolithography and 3D printing technique, and have great potential for use in inter-layered packaging and antenna. However, it is still a challenge to construct photoactive structure which combines low dielectric properties. In the present work, we propose a new type of low dielectric UV-curable resins by employing photoactive silacyclobutene groups. This low dielectric resins were prepared by UV/thermally curing of siloxane-benzocyclobutene oligomers (SBCOs). Oligomeric SBCOs were prepared by the simple hydrolysis-polycondensation of 1,1-dichlorosilacyclobutane followed by termination of the benzocyclobutene groups. In this way, silaycyclobutene and benzocyclobutene groups were simultaneously introduced into the resins to enable UV and thermally curing of SBCOs. The molecular weight of SBCOs were tuned by the ratio of 1,1-dichlorosilacyclobutane and benzocyclobutene-containing monomer. The cured siloxane-benzocyclobutene resins were thermostable, mechanically strong, and had low dielectric properties.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
POLYMER BULLETIN
·
2017
·Vol. 74
·期 12
·5049-5063
·
IF 1.43
Jiao Zhen,Yang Qianqian,Wang Xianwei,Wang Chenchen
The UV-curable hyperbranched urethane acrylate oligomers modified with different fatty acids including undecylenic acid (UCA), myristic acid (MA), and oleic oil (OA) are successfully synthesized in this paper. The prepared oligomers are characterized using FTIR, 1 HNMR, GPC, DSC, and TGA. The properties of the UV-curable films formed by these oligomers are also determined. The effects of the oligomer structures including double bond content, chain length of the modified fatty acids, and content of fatty acid and polyurethane acrylate segment, on the properties of the cured films, which are tack-free time, pencil hardness, impact resistance, adhesion, and boiling water resistance, are discussed in detail. It is observed that the curing film formed by HBPE 2 -60%UCA-20%PUA shows the best comprehensive performance among the films prepared in this study.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Coatings
·
2022
·Vol. 12
·期 7
·885
·
IF 3.236
Deling Yuan,Zhihui Zhai,Eryu Zhu,Huilin Liu,Tifeng Jiao,Shoufeng Tang
Humic acid (HA) has complex molecular structure and is capable of adsorption, ion exchange, and chelation with organic and inorganic pollutants in water bodies, worsening water quality and jeopardizing human health and ecological environment. How to effectively remove HA from water is one of the research focuses of this paper. In this study, the UV-activated sodium perborate (SPB) synergistic system (UV/SPB) was established to eliminate HA in water. The effects of initial HA concentration, SPB dose, and initial pH value on the HA elimination were determined, and the main mechanisms of the synergy and HA degradation were explored. The outcomes show that the HA elimination ratio by the sole UV and only SPB system were only 0.5% and 1.5%, respectively. The HA removal of UV/SPB reached 88.8%, which can remove HA more effectively than other systems. Free radical masking experiment proved that hydroxyl radical produced by SPB activation is the main active substance for HA removal. The results of UV-vis absorption spectrum, absorbance ratio, specific UV absorbance, and excitation–emission matrix spectroscopy verified that the UV/SPB system can effectively decompose and mineralize HA.
研究领域:
环境科学
·
水处理技术
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2019
·Vol. 16
·期 5
·1367-1378
·
IF 1.584
Chen Junhua,Yuan Teng,Tu Weiping,Peng Kaimei,Hu Jianqing,Wang Feng
Microgels are novel functional polymers with an intramolecular crosslinked structure that can significantly improve the mechanical properties of coatings. We demonstrate herein for the first time successful fabrication of microgels based on branched poly(ethylenimine) (PEI) and their incorporation into water-soluble polyacrylate (WPA), with subsequent preparation of compact coatings via electrophoretic deposition (EPD) and ultraviolet (UV) radiation. The films including the microgels exhibited tensile strength and elongation at breakage values above 6.82 MPa and 72.09%, respectively. The coatings showed good thermal stability, decreased water absorption, outstanding durability, and rust resistance after immersion in 5 wt% NaCl solution for 7 days at 40°C. This work provides a new strategy that can be readily applied to a variety of conductive substrates.
研究领域:
材料科学
·
涂层技术
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DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 24
·7583-7590
·
IF 7.393
Li Jiang,Huihuang Huang,Fubing Gui,Yalun Xu,Qianqian Lin
In recent years, AgBiS2 has received great attention in optoelectronics thanks to its fascinating merits, including a suitable bandgap, large absorption coefficient from ultraviolet to near-infrared and remarkable material stability. However, the poor carrier transport properties limit its further development and applications. To address this issue, we propose a composite strategy to facilitate the carrier transport of AgBiS2 QD films. The AgBiS2–organic hybrid films demonstrated enhanced photoconductivity. Then, we fabricated phototransistors based on these blend films, and achieved a high photosensitivity (Ilight/Idark) of 1.5 × 103, a decent responsivity of up to 20 A W−1, an excellent specific detectivity of 4 × 1013 Jones under low UV illumination and remarkable device stability. These results again demonstrate the great potential of AgBiS2 for next generation solution-processed photodetectors.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jinming Wan,Jun Xu,Shiyun Zhu,Jinpeng Li,Bin Wang,Jinsong Zeng,Jun Li,Kefu Chen
Despite the market demand for biofiber assemblies endowed with superhydrophobicity being huge, the current approaches to their production are complicated, time-consuming, and even pose a serious threat to the environment. Here, we report a simple surface treatment strategy to prepare environmentally friendly superhydrophobic biofiber composites. The obtained samples have certain UV resistance properties, which are mainly determined by the titanium dioxide (TiO2) dosage. Additionally, the sample has excellent thermal stability, and the contact angle is maintained at 153.26° after heat treatment at 140 °C for 1 h. Quite encouragingly, thermal annealing of samples can transform translucent coatings into transparent structures and increase the tensile strength. The results also showed that this strategy could be integrated into the mass production process of other biofiber components as coating, such as coated paper, pulp boards, cotton gauzes, tissues, and so forth. Due to the facile preparation and environment-friendliness, this sustainable paper-based product can be used in diversified applications: packaging and storage of liquid food, protection of ancient books, UV- and rain-proof materials, and teaching demonstrations relevant to bionics, among others.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 26
·6717-6724
·
IF 4.696
Yaoquan Jiang,Yuanyuan Song,Miao Miao,Shaomei Cao,Xin Feng,Jianhui Fang,Liyi Shi
Transparent, nanocellulose–ZnO (NC–ZnO) hybrid films were fabricated via a pressure controlled extrusion process using NC fibrils and sheet-like ZnO (s-ZnO) or belt-like ZnO (b-ZnO) nanostructures. The s-ZnO and b-ZnO conjoined with the NC fibrils to form a heterogeneous, fibrous network structure. The NC–ZnO hybrid films with different amounts of ZnO nanostructures showed a synergic feature of high optical transparency and excellent UV-blocking. The results indicated that NC assembled with s-ZnO hybrid film possessed excellent UV-blocking ability in a wide range from 200 to 375 nm, in contrast to NC–b-ZnO. Moreover, the prominent thermal and photo stability of transparent NC–ZnO hybrid films enhanced extensibility and ease of use for diverse biological applications, which require tolerance of temperature changes.
研究领域:
材料科学
·
生物学
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DOI
高影响因子
Toxins
·
2022
·Vol. 14
·期 2
·93
·
IF 5.075
Hongmei Liu,Zhihong Xuan,Jin Ye,Jinnan Chen,Meng Wang,Stephan Freitag,Rudolf Krska,Zehuan Liu,Li Li,Yu Wu,Songxue Wang
An immunoaffinity magnetic beads (IMBs) based automatic pretreatment method was developed for the quantitative analysis of deoxynivalenol (DON) by ultra-performance liquid chromatography and ultraviolet detector (UPLC-UV). First, N-hydroxysuccinimide-terminated magnetic beads (NHS-MBs) with good magnetic responsivity and dispersibility were synthesized and characterized by optical microscopy, scanning electron microscopy (SEM), and laser diffraction-based particle size analyzer. Then, the amino groups of anti-DON monoclonal antibody (mAb) and the NHS groups of NHS-MBs were linked by covalent bonds to prepare IMB, without any activation reagent. The essential factors affecting the binding and elution of DON were meticulously tuned. Under optimal conditions, DON could be extracted from a real sample and eluted from IMB by water, enabling environmentally friendly and green analysis. Hence, there was no need for dilution or evaporation prior to UPLC-UV analysis. DON in 20 samples could be purified and concentrated within 30 min by the mycotoxin automated purification instrument (MAPI), allowing for automated, green, high-throughput and simple clean-up. Recoveries at four distinct spiking levels in corn and wheat ranged from 92.0% to 109.5% with good relative standard deviations (RSD, 2.1–7.0%). Comparing the test results of IAC and IMB in commercial samples demonstrated the reliability and superiority of IMB for quantitatively analyzing massive samples.Keywords:deoxynivalenol;immunoaffinity magnetic beads;automatic;UPLC-UVKey Contribution:An immunoaffinity magnetic beads-based automatic pretreatment method was developed for the quantitative analysis of deoxynivalenol by UPLC-UV, with water used as the solvent for extraction and elution.
研究领域:
分析化学
·
毒理学
·
食品科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 5
·2481-2489
·
IF 10.733
Qingqing Rao,Jiawen Zhang,Xiaoli Zhan,Fengqiu Chen,Qinghua Zhang
Smart surfaces with special wettability properties have attracted remarkable attention due to the potential for extensive applications in liquid manipulation techniques. However, the challenges in lubricant-wastage and the programmable droplet sliding pathway remain. Here, a silicon oil-infused porous slippery surface was fabricated with UV-responsive controllable wettability (UVRS), and then, the UVRS was integrated with a non-UV-responsive slippery surface (NUVRS) to form composite UV-responsive surfaces (CUVRSs). Due to the conformational transformation of the azobenzene groups under UV light irradiation, the lubricant lost from the surface could be self-replenished, eventually rebuilding a new lubricant layer to re-form the slippery surface. Besides, the color of the exposed surface changed simultaneously, thus providing a new way to monitor the wettability changes and droplet sliding route. By adjusting the design of the “cutting patterns” on NUVRSs and the pattern of the UV masks, the droplet-guiding channels could be programmed orderly. In addition, these programmable droplet pathways could not only be used for point-to-point liquid transportation but also for constructing tailored microfluidic- and micro-reactors. These findings provide a novel way to rebuild smart slippery surfaces and design programmable droplet sliding pathways, thus advancing the application of intelligent slippery surfaces in liquid manipulation, microfluidics and micro-reactor settings.
研究领域:
材料科学
·
表面工程
·
微流控技术
·
化学工程
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DOI
高影响因子
ChemPhysMater
·
2026
·
IF 5.3
Tao Zhang,Guishan Tu,Junyu Chen,Jiang Cheng,Lu Li,Guiliang Peng,Wenjing Yang,Jiongyu Hu,Shenghao Wang
The detection of hydrocortisone (cortisol, HC) at physiological concentrations ranging from nanomolar to picomolar levels presents significant technical challenges. Although UV spectroscopy offers rapid and economic analysis, existing detectors lack the necessary sensitivity and exhibit excessive noise for reliable low-concentration measurements. This study introduces an advanced UV photodetector employing a novel vertical architecture of ITO/TiO 2 /Bi 2 O 3 /NiO/AgNWs, enhanced with a pyrolytic hafnium acetylacetonate protective (PHAA) layer. The developed device demonstrates exceptional performance metrics including a detectivity surpassing 1.1×10 11 Jones, an ultralow detection threshold below 1 nW cm −2 , and rapid response times between 9–12 ms. Remarkably, the unencapsulated device maintains outstanding stability with less than 2% performance variation after three months of ambient exposure. Building on this platform, we created an integrated HC detection system that overcomes baseline drift issues through innovative pulse signal design. The system achieves detection limits of 8–16 nmol/L across a broad concentration range, while demonstrating excellent specificity against common interferents (urea, sodium chloride, and other electrolytes) and robust ambient light immunity. These combined advancements establish our photodetector as a transformative solution for next-generation medical HC monitoring systems.
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产品关联
DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 14
·1778
·
IF 5.8
Hanyang Zhao,Qingjun Jin,Hongwei Zhao,Yunkai Yang,Xiang Cheng,Xiujuan Ren,Hongxing Shi
To elucidate the formation of crosslinked products and their influence on material degradation, thermoplastic polyurethane (TPU) films were subjected to accelerated UV aging for various durations. Post-aging, the samples underwent Soxhlet extraction with tetrahydrofuran (THF), yielding an insoluble fraction—operationally defined as the crosslinked product—and a soluble uncrosslinked fraction. The mechanical properties, molecular weight distribution, swelling behavior, thermal properties, and chemical structure were analyzed. As UV aging progressed, both tensile strength and elongation at break deteriorated markedly. Concurrently, GPC analysis revealed a continuous decrease in molecular weight and a broadening of the molecular weight distribution, confirming that chain scission was the dominant degradation pathway. An insoluble network-like residue, defined as the crosslinked product, first appeared after 12 h of aging, with its content increasing to 22.9% after 300 h. Swelling tests showed that the crosslinked product had a high gel fraction, and its swelling ratio decreased from 196.8% to 157.4%, indicating the formation of a stable and increasingly dense network. DSC and TG results revealed restricted segmental motion, altered thermal transition behavior, and enhanced char-forming ability. The glass transition temperature of the crosslinked product exceeded that of the pristine TPU film. FTIR analysis showed variations in the -NH2, C=O, C-O, and C-O-C bands, confirming structural evolution within both hard and soft segments. In summary, UV aging of TPU involves a complex interplay among chain scission, degradation of soft segments, rearrangement of hard segments, evolution of hydrogen bonds, and radical-induced crosslinking. Crucially, the crosslinked network formed during aging plays a pivotal role in determining the macroscopic structural, thermal, and mechanical properties of the polymer.
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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）