Urushiol-functionalized mesoporous silica nanoparticles and their self-assembly into a Janus membrane as a highly efficient hemostatic material

Chen, Jiawen; Cheng, Wei; Chen, Shuning; Xu, Wenqin; Lin, Jinhuo; Liu, Haiqing; Chen, Qinhui

doi:10.1039/c8nr05882b

Cited by 60 publications

(47 citation statements)

References 38 publications

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“…The C 1 s spectrum of SiO 2 @PS consisted of two Gaussian‐Lorentzian peaks which were π‐π* satellite (291.3 eV) and CC or CC (284.8 eV). After SiO 2 @PS were reacted with MMA, the C 1 s peaks of SiO 2 @PS‐PMMA were π‐π* satellite (291.3 eV), CO (289.1 eV), CO (286.1 eV) and CC or CC (284.8 eV) (Figure 4(c)), respectively 35,36 . Compared with SiO 2 @PS, the CC or CC BE of SiO 2 @PS‐PMMA remained substantially unchanged, accompanied by the new peaks at 286.1 and 289.1 eV assigned to CO and CO.…”

Section: Resultsmentioning

confidence: 99%

“…After SiO 2 @PS were reacted with MMA, the C 1 s peaks of SiO 2 @PS-PMMA were π-π* satellite (291.3 eV), C O (289.1 eV), C O (286.1 eV) and C C or C C (284.8 eV) (Figure 4 (c)), respectively. 35,36 Compared with SiO 2 @PS, the C C or C C BE of SiO 2 @PS-PMMA remained substantially unchanged, accompanied by the new peaks at 286.1 and 289.1 eV assigned to C O and C O. In addition, the π-π* satellite peak of SiO 2 @PS-PMMA was much weaker than that of SiO 2 @PS, indicating that the thickness of PMMA-chain corona around PS was sufficient to shield most signals from XPS instrument to PS core.…”

Section: Physical-mechanical Propertiesmentioning

confidence: 99%

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Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Liu

Chen

et al. 2020

J of Applied Polymer Sci

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The compatibility of poly(p‐dioxanone) (PPDO) and poly(lactic acid) (PLA) is very important when they are blended. Herein, three kinds of snowman‐like Janus particles (JPs) with different hydrophilic–lipophilic balance (HLB) were prepared by one‐pot method by adjusting the surficial functional groups of polystyrene (PS) side and used as the compatibilizer of PPDO/PLA composites. JPs self‐assemble at the cell‐structure PPDO/PLA interface, which provides channels for the migration of PPDO. The silica (SiO2) side forms hydrogen bond with PLA, and the PS side forms hydrophobic action with PPDO. Therefore, JPs improve interfacial adhesion and suppress phase separation. Among the three JPs, silica@polystyrene‐graft‐polymethylmethacrylate (SiO2@PS‐PMMA) possesses the most excellent interfacial behavior because its HLB value is similar to that of PPDO/PLA composites. Tensile strength was increased from the original 14.59 MPa to the maximum 24.18 MPa at 1.5 phr of SiO2@PS‐PMMA JPs, and the elongation at break increased from 39% to 203%.

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Section: Resultsmentioning

confidence: 99%

Section: Physical-mechanical Propertiesmentioning

confidence: 99%

Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Liu

Chen

et al. 2020

J of Applied Polymer Sci

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“…The anticorrosion performance of the coatings was characterized by potentiodynamic polarization 39 with the electropolymerization system, where the coated Cu was used as the working electrode and a corrosive solution containing 3.5 wt% NaCl as the electrolyte. The potentiodynamic polarization curves were obtained by sweeping the potential from −300 mV to +300 mV relative to the open circuit potential ( vs. SCE) at a scan rate of 1 mV s −1 at 25 °C.…”

Section: Methodsmentioning

confidence: 99%

Precision synthesis of 3-substituted urushiol analogues and the realization of their urushiol-like performance

et al. 2019

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Urushiol is a resource-limited natural coating material with diverse applications; however, the synthesis of urushiol analogues and the realization of their urushiol-like performance remain challenging. Herein, four urushiol analogues, namely, 3-((4-alkenoylpiperazin-1-yl)methyl)catechols with the precise 3-substitution pattern on a catechol as that found in urushiol were synthesized by employing the Mannich reaction of catechol with formaldehyde and N-Boc-piperazine as the key step in a two-step route. By using optimization, the advantages of convenience in operation, cost-effectiveness, and scalability could be obtained. The electropolymerization of these analogues on copper was found to be practical due to their higher aerobic stability than urushiol, affording robust coatings with desirable hardness, adhesion strength, hydrophobicity, and thermal stability. Furthermore, the coatings exhibited effective corrosion protection on copper with initial anticorrosion efficiency up to 99.9% and comparatively higher efficiency (more than 97%) after 4 weeks of immersion in 3.5 wt% NaCl solution. The evidence from the electrochemical and infrared spectroscopic characterization data revealed that the electropolymerization process mechanically involved the free radical coupling of phenoxyl radicals to themselves and to the C]C bonds in the side chain, forming a robust crosslinking coating. This work paves a way for the synthesis of high-performance urushiol analogues with potential applications as metal protection materials.Scheme 1 Composition of natural urushiol, structures of synthesized urushiol and urushiol analogues, and synthesis route for urushiol analogues used in this work.This journal is

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“…Because of the low compatibility between IFR and raw lacquer, there are more particles inside the membranes when IFR is increasingly added. However, the presence of IFR makes the interior structure of RL/IFR membranes more compact, which may be ascribed to the interaction between silica as well as RL's phenolic hydroxyl that strengthens the cross-linking level of urushiol [29].…”

Section: Sem Analysismentioning

confidence: 99%

Synthesis of a Compound Phosphorus-Nitrogen Intumescent Flame Retardant for Applications to Raw Lacquer

Shiu

Lou

et al. 2021

Polymers

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Raw lacquer (RL) is a natural polymer compound with highly promising applications; however, its inflammable attribute restricts the industrial applications. In this study, melamine is used to formulate tri (1-melamine-2-propanol) phosphate (FR-1), after which it is synthesized with ammonium phosphate (FR-2) and diatomite to form a compound phosphorus-nitrogen intumescent flame retardant (IFR). Next, IFR is used as the filling agent that then cross-links with RL, and as such RL/IFR membranes are formed after the curing. The limiting oxygen index (LOI) measurement, the vertical combustion test (UL-94), the microshape calorimetric analysis (CCT), and the thermal gravimetric analysis (TGA) are conducted to examine the combustion resistance and thermal stability of the membranes. Fourier transform infrared spectroscopy (FT-IR) and electron scanning microscope (SEM) are performed to separately characterize the structure and compatibility; the mechanical properties of the membranes are also evaluated. The vertical combustion test results confirm that with 30 wt% of IFR, RL/IFR membranes acquire 12.3% higher LOI and a vertically combustion of V-0 level. The TGA indicates that RL/IFR membranes demonstrate a greater adhesion level, a higher rigidity, and better luster than pure RL membranes.

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Urushiol-functionalized mesoporous silica nanoparticles and their self-assembly into a Janus membrane as a highly efficient hemostatic material

Abstract: MSN@U based on urushiol with catechol groups possessed rapid hemostatic performance because they self-assembled into a Janus membrane at the interface.

Cited by 60 publications

References 38 publications

Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Precision synthesis of 3-substituted urushiol analogues and the realization of their urushiol-like performance

Synthesis of a Compound Phosphorus-Nitrogen Intumescent Flame Retardant for Applications to Raw Lacquer

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