Preparation of amidoxime-functionalized mesoporous silica nanospheres (ami-MSN) from coal fly ash for the removal of U(VI)

Wang, Bangda; Zhou, Yuexi; Li, Lei; Wang, Yi

doi:10.1016/j.scitotenv.2018.01.057

Cited by 64 publications

(26 citation statements)

References 37 publications

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“…All of these small peaks are the characteristic peaks of NAC. 28 The amount of NAC absorbed on MSNs was studied through TGA. The TGA thermograms of MSNs and NAC@MSN show two weight loss stages ( Figure 2E).…”

Section: Morphological Characteristics and Physical Properties Of Msnmentioning

confidence: 99%

<p>NAC-loaded electrospun scaffolding system with dual compartments for the osteogenesis of rBMSCs in vitro</p>

Zhu¹,

Song²,

Ju³

et al. 2019

IJN

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PurposeIn this study, we aimed to develop a unique N-acetyl cysteine (NAC)-loaded polylactic-co-glycolic acid (PLGA) electrospun system with separate compartments for the promotion of osteogenesis.Materials and methodsWe first prepared solutions of NAC-loaded mesoporous silica nanoparticles (MSNs), PLGA, and NAC in N, N-dimethylformamide and tetrahydrofuran for the construction of the electrospun system. We then fed solutions to a specific injector for electrospinning. The physical and chemical properties of the scaffold were characterized through scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. The release of NAC and Si from different PLGA scaffolds was estimated. The cell viability, cell growth, and osteogenic potential of rat bone marrow-derived stroma cell (rBMSCs) on different PLGA scaffolds were evaluated through MTT assay, live/dead staining, phalloidin staining, and Alizarin red staining. The expression levels of osteogenic-related markers were analyzed through real-time PCR (qRT-PCR).ResultsNAC was successfully loaded into MSNs. The addition of MSNs and NAC decreased the diameters of the electrospun fibers, increased the hydrophilicity and mechanical property of the PLGA scaffold. The release kinetic curve indicated that NAC was released from (PLGA + NAC)/(NAC@MSN) in a biphasic pattern, that featured an initial burst release stage and a later sustained release stage. This release pattern of NAC encapsulated on the (PLGA + NAC)/(NAC@MSN) scaffolds enabled to prolong the high concentrations of release of NAC, thus drastically affecting the osteogenic differentiation of rBMSCs.ConclusionA PLGA electrospun scaffold was developed, and MSNs were used as separate nanocarriers for recharging NAC concentration, demonstrating the promising use of (PLGA + NAC)/(NAC@MSN) for bone tissue engineering.

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Section: Morphological Characteristics and Physical Properties Of Msnmentioning

confidence: 99%

<p>NAC-loaded electrospun scaffolding system with dual compartments for the osteogenesis of rBMSCs in vitro</p>

Zhu¹,

Song²,

Ju³

et al. 2019

IJN

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“…Although, both pristine CFA and S‐CFA showed the peaks at 1,027; 725; 430 and cm −1 characterized for Si‐O‐Si links. These results also indicated that the main composition of CFA is silica . The condensation reaction between Si‐OH of silane coupling agents and Si‐OH in silica surface were considered as main reason of the success of the silanization processing .…”

Section: Resultsmentioning

confidence: 66%

Simultaneous effects of silanized coal fly ash and nano/micro glass fiber on fracture toughness and mechanical properties of carbon fiber‐reinforced vinyl ester resin composites

Nguyen

Phúc

et al. 2018

Polymer Engineering & Sci

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In this study, the simultaneous effects of both silanized coal fly ash (S‐CFA) and nano/micro glass fiber (nGF) on fracture toughness and mechanical properties of vinyl ester (VE) resin filled with carbon fiber‐based composite materials were investigated. The CFA was treated with (3‐trimethoxysilyl) propyl methacrylate to introduce the methacryloxy groups into the surface of CFA, and was confirmed by using FTIR technique. The nGF and S‐CFA with different weight ratios were well mixed with VE resin by using of high‐speed mechanical stirrer, and ultrasonic technique before using as matrices for fabrication of carbon fiber‐based composite materials via sheet molding compound (SMC) method and hot curing processing. Many characteristics of both cured VE resin composites and carbon fiber‐based composite were examined such as mechanical properties, fracture toughness, and morphology. The results showed that by adding of both 0.1 wt% nGF and 1 wt% S‐CFA into VE resin the tensile strength, tensile modulus, flexural strength, KIC, impact strength as well as the Mode I interlaminar fracture toughness (GIC) of VE composites and carbon fiber based composites get optimum values and increased about 61.39%; 39.83%; 36.21%; 103.1%; 81.79%; 48.61%, respectively when compared with pristine materials. POLYM. ENG. SCI., 59:584–591, 2019. © 2018 Society of Plastics Engineers

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“…The prepared stationary phase was characterized using FT‐IR spectroscopy, NMR, spectroscopy thermogravimetric analysis, particle size distribution, N 2 adsorption‐desorption experiments, SEM, and TEM. The results are shown in Supporting Information .…”

Section: Resultsmentioning

confidence: 99%

Alkaloid purification using rosin‐based polymer‐bonded silica stationary phase in HPLC

Sun

Wang

et al. 2019

J of Separation Science

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Alkaloids are important natural products that exhibit a wide spectrum of pharmacological activities. To efficiently separate and purify them, a rosin‐based polymer‐bonded silica stationary phase in high‐performance liquid chromatography was synthesized via the surface radical polymerization of ethylene glycol maleic rosinate acrylate and methacrylic acid onto functionalized silica. The stationary phases, columns, optimization of chromatographic conditions for alkaloids, and thermodynamic behavior of the analytes on the column were fully studied. Under the optimized conditions, the prepared column efficiently purified natural camptothecine, caffeine, and evodiamine with the corresponding purities of 92, 96, and 97%. With this work, we have developed an efficient approach to isolate alkaloids and promoted the research on rosin‐based materials in biomedicine and analytical chemistry.

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Preparation of amidoxime-functionalized mesoporous silica nanospheres (ami-MSN) from coal fly ash for the removal of U(VI)

Cited by 64 publications

References 37 publications

<p>NAC-loaded electrospun scaffolding system with dual compartments for the osteogenesis of rBMSCs in vitro</p>

<p>NAC-loaded electrospun scaffolding system with dual compartments for the osteogenesis of rBMSCs in vitro</p>

Simultaneous effects of silanized coal fly ash and nano/micro glass fiber on fracture toughness and mechanical properties of carbon fiber‐reinforced vinyl ester resin composites

Alkaloid purification using rosin‐based polymer‐bonded silica stationary phase in HPLC

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