Preparation of villus-like PMMA/silica hybrids via surface modification and wet grinding

Chen, Yen‐Chung; Chen, Xinliang; Liu, Robert Lian-Huey; Shu, Hsiou-Jeng; Ger, Ming-Der

doi:10.1016/j.jallcom.2010.07.187

Cited by 11 publications

(5 citation statements)

References 32 publications

(38 reference statements)

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“…This effect may have occurred due to the presence of the excessive amount of GEO on the surface of particles. According to the literature, at highly negative or positive values of zeta potential (more than 30 mV or less than −30 mV), particles in dispersions tend to repel each other, that is, the dispersion will resist aggregation (Chen et al., 2010). For all the formulations, except for that containing chitosan: GEO ratio of 1:1.25, the absolute values of surface charge were higher than 30 mV, indicating the electrostatic repulsions among CCMPs were enough for good stability.…”

Section: Resultsmentioning

confidence: 99%

Encapsulation of ginger essential oil in chitosan‐based microparticles with improved biological activity and controlled release properties

Fathi

Samadi

Rostami

et al. 2021

J. Food Process. Preserv.

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The objective of the present work was to encapsulate ginger essential oil (GEO) into chitosan‐based microparticles (CMPs) using the ionic gelation method. The fabricated microparticles showed a particle size range of 342–531 nm with a zeta potential of 23.4–45.4 mV. Fourier‐transform infrared (FTIR) analysis confirmed a successful encapsulation without any chemical alteration of GEO. The maximum encapsulation efficiency (31.18 ± 0.94) was obtained for the sample with essential oil to chitosan ratio of 25%. The optimal weight ratio of chitosan to ginger was found to be 1:0.5. In vitro release test revealed that the greatest release of GEO (78.11%) occurred in an acidic medium. It also was found that the thermal stability and antioxidant capacity of GEO improved considerably by encapsulation. Practical applications Considering the high antioxidant activity and thermal stability of GEO‐loaded CMPs, they can be used as a valuable additive in the food industry to extend the shelf life and preserve the quality of foods.

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Section: Resultsmentioning

confidence: 99%

Encapsulation of ginger essential oil in chitosan‐based microparticles with improved biological activity and controlled release properties

Fathi

Samadi

Rostami

et al. 2021

J. Food Process. Preserv.

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show abstract

“…The structure of VTES layers can be significantly different due to the use of different modification methods. At present, researchers have adopted XPS [3,5,13,18,39], IR [3,4,7,11,14,17,23,35,[48][49][50], NMR [8,9,21,22,51], TEM/SEM [4,7,11,13,14,15,22,23,25,27,28,[52][53][54] and TG [9,11,23,24,48] to characterize VTES-SiO 2 , obtaining a series of information of the morphology and size of VTES-SiO 2 , as well as the change of dispersivity, structure of VTES layer and modification mechanism etc.…”

Section: Characterization Of Vtes-siomentioning

confidence: 99%

“…Silica modified with VTES can react with various substances forming chemical bonds, thus enhancing the compatibility between organic and inorganic phases via reducing the difference between inorganic and organic interface. This is why VTES-SiO 2 has promising application in rubber [4,54,[57][58][59][60], glass [6,[61][62][63], ceramics [32], fiber [23,42], paint [31,39,44,64,65], enzyme fixation [10,11,44], drug carrier [2,66], luminescent materials [67][68][69][70][71], catalyst [72], mesoporous molecular sieves [73,74], and analytical chemistry [75,76] etc.…”

Section: Application Of Vtes-siomentioning

confidence: 99%

“…Compared with µ-HA rubber, n-HA rubber has greatly increased tensile strength. Chen et al [54] significantly enhanced thermal stability of polymethylmethacrylate hybrid microsphere by coating with VTES-SiO 2 layer. Xiao et al [62] used VTES as organic precursor to prepare organic modified silica glass and greatly enhanced the flexibility and fluorescence at a VTES content of below 50%.…”

Section: Application Of Vtes-siomentioning

confidence: 99%

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The Surface Modification of Silica with Vinyltriethoxysilane

Zhang

Chang

2011

AMR

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A review is provided of the research progress of silica modified with vinyltriethoxysilane (VTES-SiO2). The typical methods for preparing VTES-SiO2are introduced. The structure and stability of VTES layer and the controllability of various modified methods are elucidated. The characterization of VTES modified layer by means of Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, nuclear magnetic resonance, thermogravimetry, scanning electron microscopy and transmission electron microscopy are highlighted. Moreover, the application of VTES-SiO2 in the fields of rubber, glass, china, fiber, leather, paint, drug carrier, luminescent materials, catalyst technology, analytical chemistry and biochemistry were described in detail. The development trend on the preparation, determination of active groups and applications for VTES-SiO2were prospected, as well as the mechanism and the existing problems.

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“…These improvements include increased electrical conductivity, high mechanical strength and decrease in oxygen permeability. So, polymer nanocomposites based on carbon nanotubes are of current interest due to their potential application in various fields [6,7]. CNTs have attracted great interest because of their unique physical and chemical properties, such as high mechanical strength, electrical, thermal stability and chemical stability [8,9] as compared to the virgin matrix.…”

Section: Introductionmentioning

confidence: 99%

The preparation and characteristic of maleic anhydride grafted polyethylene (PE-g-MA) filled CNT/PMMA composite film

Chunzheng

2017

Journal of Experimental Nanoscience

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In order to improve the tribological properties of PMMA, the PMMA composites incorporated with CNT powders were prepared. The effect of CNT content on tribological properties of the composites was investigated. When CNT content is 0.5 wt%, the friction coefficients of the 0.5%CNT/PMMA composite are the smallest, which are about 0.15 and are 67% less than those of the pure PMMA composite, and its wear resistance remains the same as the pure PMMA composite. Incorporating 0.5 wt% CNT into the PMMA composite may develop a continuous transferred film on the worn surface. As a result, the friction coefficients of the composite are reduced and its wear mechanism is mainly fatigue spalling. The addition of PE-g-MA improved the friction and wear properties of CNT/PMMA composite.

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Preparation of villus-like PMMA/silica hybrids via surface modification and wet grinding

Cited by 11 publications

References 32 publications

Encapsulation of ginger essential oil in chitosan‐based microparticles with improved biological activity and controlled release properties

Encapsulation of ginger essential oil in chitosan‐based microparticles with improved biological activity and controlled release properties

The Surface Modification of Silica with Vinyltriethoxysilane

The preparation and characteristic of maleic anhydride grafted polyethylene (PE-g-MA) filled CNT/PMMA composite film

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