EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Liguang Yuan,Baoliu Qu,Jinge Li,Hongying Lv,Xiaoniu Yang
Surface modification is an effective method to improve the anti-platelets property for blood-contacting biomedical materials. However, for elastomer it is still a challenge to develop a simple and versatile method to preserve desirable property of the modified surface upon repeated deformation. Herein, we synthesized a novel modifier based on the photoreactive benzophenone (BP), which is served as anchor to fix polyethylene glycols (PEG)s onto polymer surface so as to achieve durable anti-platelets surface. Upon ultra-violet (UV) exposure for a very short time, this modifier (BP-PEG) was chemically bonded onto polyurethane (PU) so that its surface property was improved. When increasing the molecular weight or incorporating sulfonate group into BP-PEG, the anti-platelets surface of PU was obtained and this property still could be preserved upon repeated deformation. The universality of this surface modifier was verified by its successful application to the other polymer substrates and improved hydrophilicity. We anticipate this work would pave a new way to construct durable surface with unique property for biomedical devices.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Hongyang Deng,Lixian Guo,Keping Chen,Ping Zhang,Yewei Xu,Ningning Song,Chunrong Tian,Jianhua Wang,Shuen Liang
Polyurea (PUA) elastomers have gained increasing attention in both defense and civilian fields due to its remarkable mechanical properties and protective capabilities. However, its high flammability significantly limits its application in many fields. It is challenging to achieve high flame retardant rating and maintain high mechanical properties simultaneously. Synergistic combination of different types of flame retardants is essential for this purpose. Herein we report a highly efficient synergistic combination of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) and ammonium phosphate (APP) for flame retardance of PUA. BTDA contributes to excellent char-forming in solid phase, and APP contributes to radical scavenging in gaseous phase. By incorporating BTDA and APP as additive flame retardants in PUA, the melt dripping in combustion was entirely suppressed, and V-0 rating in UL-94 test was achieved. The heat release rate and the release of smoke and toxic gases were greatly reduced. Meanwhile, the mechanical properties of PUA were maintained very well. The PUA composites with outstanding flame retardancy and mechanical properties may serve as ideal protective materials in a variety of applications.
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
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Siying Li,Rong Zhang,Junlan Xie,Dur E. Sameen,Saeed Ahmed,Jianwu Dai,Wen Qin,Suqing Li,Yaowen Liu
In this study, poly(vinyl alcohol) (PVA) membranes containing Ag nanoparticles (AgNPs) were prepared by electrospinning and grafted copolymerization with 3,3′,4,4′-benzophenone tetracarboxylic acid (BPTA) to provide better mechanical properties, lower water vapor transmittance, and higher antibacterial activity (against Staphylococcus aureus and Escherichia coli ) than the PVA/AgNPs membrane. The PVA/AgNPs/BPTA membrane showed higher antibacterial activity than the other membranes, and it produced inhibition zones with diameters of 18.12 ± 0.08 and 16.41 ± 0.05 mm against S. aureus and E. coli , respectively. The PVA/AgNPs/BPTA membrane was found to be capable of promoting reactive oxygen species (ROS) formation under both light and dark conditions. Cycling experiments performed following ROS quenching showed that the best-performing composite membrane retained >70% of its original OH⋅ radical and H 2 O 2 charging capacity after seven cycles. In the filtration test, the electrospun nanofibrous membranes showed high filtration efficiencies of 99.98% for sodium chloride (NaCl). In addition, these membranes maintained a relatively low pressure drop of 168 Pa with a basis weight of 2.1 g m −2 . Thus, the PVA/AgNPs/BPTA membrane was concluded to be a promising medical protective material offering the benefits of structural stability and reusability.
研究领域:
材料科学
·
生物学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Shuangfei Zhao,Cong Chen,Peng Zhu,Huanming Xia,Jinyu Shi,Fanyuhui Yan,Ruiqi Shen
A passive micromixer platform, with the assistance of controllable mixing performance, was used for the preparation and morphology control of ultrafine explosives. This method is characterized by high mixing efficiency, safe and easy processing, low solvent consumption, and fast preparation and screening. The preparation of hexanitrostibene (HNS) in the micromixer platform has obvious advantages over the beaker in terms of particle size and particle size distribution. The particle size of HNS prepared in the platform ranges from 91 to 255 nm, while that of the HNS prepared in a beaker ranges from 106 to 615 nm with the same antisolvent/solvent ratio. The particle size of HNS can be controlled to about 100, 150, and 200 nm, and the crystal shape can be controlled to nanoscale, two-dimensional nanosheet, and short rod crystal. This study demonstrated the feasibility of a safe and efficient way of controlling the particle size and crystal shape of explosives.
研究领域:
化学工程
·
材料科学
·
爆炸物合成
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 17
·6176
·
IF 4.6
Jianfa Wu,Lei Li,Chang Liu,Chunyi Li,Ying Cui,Weixing Ding,Jing Zhang,Leiling Shi
Two new compounds named 4,4′-bis(β-D-glucopyranosyloxy)biphenyl (1) and spirostane-25(27)-en-2α,3β-diol-3-O-β-D-xylopyranosyl(1→3)-β-D-glucopyranosyl(1→4)-β-D-galactopyranoside (2) were isolated from n-butanol extraction part of 80% ethanol extract of Allii Macrostemonis Bulbus. Alongside these, ten known compounds (3–12) were also identified, including a flavonoid glycoside (3), seven steroids (4–10), a nucleoside (11), and a phenylpropanoid glycoside (12) were found. Notably, compounds3–6were isolated from this plant for the first time. The structures of all compounds were confirmed using high-resolution electrospray ionization mass spectrometry (HR-ESI-MS), 1D, and 2D NMR spectroscopy. Some of these compounds showed strong antioxidant activity, and compound1demonstrated the most potent reduction of ferric ions (Fe3+) with an IC50value of 0.59 ± 0.18 mg/mL. Compounds2and3exhibited the highest scavenging activity against superoxide anion radicals (O2−·) with an IC50value of 0.02 ± 0.01 mg/mL. Additionally, compound3displayed substantial scavenging activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) with IC50values of 0.21 ± 0.17 mg/mL and 0.02 ± 0.01 mg/mL, respectively. The discovery of these two new compounds is a reference for identifying Allii Macrostemonis Bulbus quality markers. Moreover, their exceptional antioxidant activity offers a promising avenue for uncovering novel natural antioxidants.
研究领域:
药用植物学
·
天然产物化学
·
药物开发
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH
·
2020
·
IF 1.345
Bei-Dou Zhou,Jia-Li Li,Zhi-Peng Ruan,Gui-Fen Xu,Yuan-Yuan Fang,Jian Lin,Xiao-Ling Zhang,Dong-Bao Hu
Five polyhydroxybenzophenones were synthesized, then their antitumor and antioxidant activities were evaluated. Compounds 1–3 and 5 exhibited obvious antitumor activity. Among them, compounds 1 and 2 exhibited stronger cytotoxicity against hepatocarcinoma SMMC-7721 cells than cisplatin, with half maximal inhibitory concentrations (IC50) of approximately 3.86 and 5.32 μM, respectively. Compounds 1, 2, and 3 exhibited stronger antioxidant activity than trolox, with IC50 values of 11.15, 10.15, and 8.91 μM, respectively, and the antioxidant mechanism and strength of all compounds were further verified using computational chemistry. These results demonstrated that compounds 1–3 and 5 were very promising leads for further structural modification.
研究领域:
药理学
·
有机化学
·
肿瘤学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Xiaodan Gong,Haojie Yu,Li Wang,Jian Hu,Luming Wang,Chengjiang Li
Foggy surfaces can damage the optical performance of devices and even cause adverse consequences like safety concerns in some cases. Various antifogging coatings have been proposed to relieve this trouble. Nevertheless, most coatings suffer from temporary fog-repellency features due to hygroscopic swelling behavior and detachable interface. Herein, we reported an antifogging coating with persistent fogging prevention via the introduction of the amphiphilic polymer and interfacial layer. With the aid of benzophenone (BP) groups, both bulk crosslinking and interfacial bonding were achieved to prevent relatively macroscopic motions of coating from the substrate under extreme conditions. In virtue of the minor swelling and interfacial adhesion, the coating could preserve the fog-free behavior after 50-cycle antifogging tests and even aging for 90 days under harsh conditions. Notably, both in vitro (pig larynx) and vivo (living rabbit) outcomes indicated excellent fog-repellency of the polymer-coated endoscope.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
产品关联
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
CRYSTENGCOMM
·
2015
·Vol. 17
·期 15
·3031-3040
·
IF 4.034
Liu-Zheng Zhu,Cong-Zhi Wang,Lei Mei,Lin Wang,Yun-Hai Liu,Zhen-Tai Zhu,Yu-Liang Zhao,Zhi-Fang Chai,Wei-Qun Shi
Two novel uranyl coordination polymers, namely, UO2(bptc)(H2bpy)·(bpy) (1) and (UO2)3(bptc)1.5(phen)2(H2O)2·H2O (2) (H4bptc = 3,3′,4,4′-benzophenonetetracarboxylic acid; bpy = 4,4′-bipyridine; phen = 1,10-phenanthroline), have been obtained via a hydrothermal method based on a semi-rigid aromatic tetracarboxylic ligand and two different auxiliary or templating N-containing ligands. Complex 1 shows a one-dimensional (1D) structure derived from double chains with two types of rings arranged alternately, which further exhibits an intriguing 3D supramolecular network induced by diverse non-covalent interactions. Complex 2 displays a dislocated “double floor” of a 2D structure (2D zigzag layers), in which the carboxylate groups of the bptc4− ligand adopt a variety of fascinating bridging modes. In addition, quantum chemical calculations were used to investigate the coordination properties and bonding nature of the as-synthesized complexes, and the results indicate that in these two complexes the 5f, 6d, and 7p orbitals of uranium and 2p orbitals of O and N atoms mainly contribute to the covalency of the U–O and U–N bonds.
研究领域:
无机化学
·
材料科学
·
理论化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Haipeng Jiang,Chunyu Wei,Jin Wang,He Dong,Xinmin Fu,Le Zhang,Fengyou Wang,Lin Fan,Maobin Wei,Huilian Liu,Lili Yang,Yongsheng Yan
Intramolecular hydrogen bonding (H-bonding) involved in the excited-state proton transfer (ESPT) process results in benzophenone derivatives (BPDs) with an excellent ability to passivate defects. However, the BPDs are in a continuing dynamic transition process between the ground state and the excited state under light radiation conditions. The ground-state BPDs may lose their ability to passivate defects, resulting in an increased defect density of the perovskite. Therefore, enhancing the passivation ability of the ground-state BPDs can help to achieve the full passivation ability of their ground state to excited state. Herein, we have researched the various BPDs by density functional theory and found that intramolecular H-bonding can weaken the passivation ability of ground-state BPDs, but intramolecular H-bonding is indispensable in the ESPT process. To address the issue, we investigated the influence of electron-donor properties and dipole moments of hydroxyl (−OH), methoxy (−OCH3), and n-octyloxy (−OC8H17) groups in BPD molecules on their coordination capacity through molecular design engineering. Ultimately, 2-hydroxy-4-n-octyloxy-benzophenone (UV5) with strong electron-donor n-octyloxy (−OC8H17) and elongated carbon-chain structure was selected as an additive, which enhances the passivate defect capability in both the ground and excited states. As a result, the UV5-based champion device achieved a power conversion efficiency (PCE) of 24.46% and remained at 75% of the initial PCE with exposure to UV light. This work focuses on the defect passivation capability of ground-state BPDs for the first time and opens a new concept for applying BPDs in PSCs.
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
危险品化学品经营许可证（带存储）