Static laser light scattering (SLLS) investigations of the scattering parameters of a synthetic polymer

Ghazy, R.; El-Baradie, B.; El-Shaer, Abdelhamid; El-Mekawey, F.

doi:10.1016/s0030-3992(99)00094-8

Cited by 25 publications

(11 citation statements)

References 16 publications

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“…As presented in Figure 7, the peaking time of the components of the purified PP without decolorization, protein removal and dialysis are between 15 and 48 min, and the peaking time of the adsorbing component is only between 25 and 42 min. Since GPC-MALLS sequentially elutes the polymer in the solution according to the molecular hydrodynamic volume order [27,28], it is shown that the PP small molecule substance is the main adsorption component at the emulsion interface. As the results suggested, dialysis treatment could have a negative impact on the emulsifying properties of PP.…”

Section: Resultsmentioning

confidence: 99%

Study on the Emulsifying Properties of Pomegranate Peel Pectin from Different Cultivation Areas

Chu

Wang

et al. 2019

Molecules

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Pomegranate peel pectin is an important acidic anionic plant polysaccharide which can be used as a natural emulsifier. In order to study its emulsifying properties, this paper systematically analyses pomegranate peel pectin samples from Chinese Xinjiang, Sichuan and Yunnan provinces, through rheometer, interfacial rheometer, Zetasizer Nano-ZS and mastersizer. It is shown that pomegranate peel pectin can effectively reduce the oil-water interfacial tension, reaching an emulsion droplet size of only 0.507 μm, 0.669 μm and 0.569 μm, respectively, while the pectin concentration is 1.5% and the oil phase (MCT) is 10%. It has also shown that the extreme conditions of pH and ion strength can not significantly change its emulsion stability. However, freeze-thaw cycles can cause the pomegranate peel pectin emulsion to become less stable. Furthermore, the effects of decolourization, protein removal and dialysis on the emulsifying properties of pomegranate peel pectin are investigated using mastersizer rheometer and interfacial rheometer. It is found that the protein and pigment in pomegranate peel pectin have little effect on its emulsifying properties, while the results from dialyzed pectin show that the small molecule substances can reduce the emulsion particle size and increase the emulsion stability. The research outcomes of this study provide technical support for the further application of pomegranate peel pectin in the food industry.

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Section: Resultsmentioning

confidence: 99%

Study on the Emulsifying Properties of Pomegranate Peel Pectin from Different Cultivation Areas

Chu

Wang

et al. 2019

Molecules

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“…The angular dependence of the scattered intensity is pre-determined by the size and shape of the scattering particles. Thus, at least of principle, it must be possible to obtain some information on the size and shape of the scattering particles from the angular dependence of scattering intensity (Ghazy et al, 1999Moreels et al, 1997Bender andLewis, 1986' Chau andRudin, 1973). The factor by which the scattering intensity I θ is diminished by interference at an angle θ is called the scattering function P(θ), which incorporates the effect of chain size and conformation on the angular dependence of scattered light intensity.…”

Section: Theorymentioning

confidence: 99%

“…The details of the experimental arrangement concerning to the phenomena of the static laser light scattering was explained in the literature (Ghazy et al, 1999;2009).…”

Section: Experimentmentioning

confidence: 99%

Determination of Scattering Parameters of a New Copolymer by Using a Laser Scattering Method

Ghazy¹

2011

American Journal of Applied Sciences

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Problem statement:In present work a poly (4 vinylphenol-co-2 hydroxethyl methacrylate) polymer, (PVPh-HEM), was selected, as a new copolymer, to study the phenomena of Optical Laser Light Scattering (OLLS). Approach: A poly (4 vinylphenol-co-2 hydroxethyl methacrylate) was investigated for its importance in the highly industrial applications in different branches. This polymer was solved in two different solvents like as Methanol and Dimethylformamide, DMF, with different concentrations 0.2, 0.4, 0.6, 0.8, 1.0×10-3 g mL −1 . OLLS data were obtained by using a self-built of laser scattering system. Results: The angular behavior of that selected polymer solution with different concentrations were studied by plotting the intensity of the scattered light against the scattering angle. The value of kc/R(θ) ratio was plotted as a function of θ through the value sin 2 (θ/2)+100C, showing what was called Zimm plot. Conclusion/Recommendations: From that plot the different scattering parameters such as Pap's molecular weight Mw, Second virial coefficient A 2 , Radius of gyration RG and molecular radius D of that polymer were determined in that two different selected solvents.

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“…light scattering have limitation range from 10 Da to 100000 KDa in the molecular weight and size from 10 nm to 1000 nm. In addition of measuring how much the interaction is done (second virial coefficient) [10,11]. Debye equation shows the important of measuring refractive index increment in the way of measuring scattering parameter.…”

Section: Introductionmentioning

confidence: 99%

Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )

Ghazy

Shaheen

Kenawy

et al. 2016

Delta Journal of Science

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Measurement of polymer characteristics by using the static laser light scattering experiment needs a precise determination of its refractive index increment, dn/dc. Through the dependence of Rayleigh scattering coefficient on the square value of the refractive index increment(dn/dc) 2. The average molecular weight of the investigated polymer is determined using a home built of Mach-Zehender Interferometer(MZI) which has been constructed to measure the refractive index, n, of Chitosan at different concentration ranging from 0.002 to 0.008 gm/L. The measurements are carried out through the dependence of fringe numbers on the laser incidence angle of polymer's solutions. The used laser beam is a He-Ne laser with 543 nm wavelength and 2mw in power (from Meridith). The obtained value of dn/dc is 0.198011 L/gm. A static laser light scattering(SLLS) experiment is constructed in our lab to measure the angular distribution of the scattered laser light intensity. From which the Rayleigh ratio Rθ, molecular weight MW, second virial coefficient A2 and the square radius of gyration are calculated through what is called as Zimm plot method .

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Static laser light scattering (SLLS) investigations of the scattering parameters of a synthetic polymer

Cited by 25 publications

References 16 publications

Study on the Emulsifying Properties of Pomegranate Peel Pectin from Different Cultivation Areas

Study on the Emulsifying Properties of Pomegranate Peel Pectin from Different Cultivation Areas

Determination of Scattering Parameters of a New Copolymer by Using a Laser Scattering Method

Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )

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