Mechanisms of Fibrinogen Adsorption on Latex Particles Determined by Zeta Potential and AFM Measurements

Langmuir ◽  
2011 ◽  
Vol 28 (1) ◽  
pp. 474-485 ◽  
Author(s):  
Zbigniew Adamczyk ◽  
Anna Bratek-Skicki ◽  
Paulina Dąbrowska ◽  
Małgorzata Nattich-Rak
Keyword(s):  
Zeta Potential ◽  
Latex Particles ◽  
Fibrinogen Adsorption

Mixtures of latex particles and the surfactant of opposite charge used as interface stabilizers – influence of particle contact angle, zeta potential, flocculation and shear energy

Soft Matter ◽  
2014 ◽  
Vol 10 (36) ◽  
pp. 7088-7095 ◽  
Author(s):  
Rémi Deleurence ◽  
Caroline Parneix ◽  
Cécile Monteux
Keyword(s):  
Contact Angle ◽  
Zeta Potential ◽  
Latex Particles ◽  
Opposite Charge ◽  
Particle Contact ◽  
Shear Energy

Using mixtures of latex and surfactant of opposite charges we decouple the effect of the charge and contact angle of the particles on the interface stabilization. We find that the key-parameters are the flocculation state of the particles and the shear energy used to produce the foams.

Influences of Superplasticizer on the Interaction between Latex Particles and Cement Grains

2013 ◽  
Vol 687 ◽  
pp. 335-340 ◽  
Author(s):  
Dong Dong Han ◽  
Jin Mei Li ◽  
Wei Deng Chen ◽  
Shi Yun Zhong
Keyword(s):  
Zeta Potential ◽  
Cement Paste ◽  
Adsorption Rate ◽  
Test Results ◽  
Polymer Particles ◽  
Latex Particles

In order to have a better understand on the interaction among superplasticizer, latex and cement grains in the fresh cement paste, the zeta potential and the adsorption of polymer on the cement were investigated in this study. The zeta potential was measured by using the ZetaProbe instrument, and the adsorption rate of latex was analyzed by sedimentation test. The zeta potential results show that the zeta potential of pure cement paste is positive and increasing slightly along the first 30mins; the latex particles can be adsorbed by cement grains, comparing with SAE latex, the adsorption of PAE latex is lower, and PAE latex has a smaller influence on the hydration of cement paste; the presence of superplasticizer can affect the adsorption of polymer particles on the cement; the sedimentation test results show that the presence of PC and NF can reduce the adsorption of latex particles, when the dosage of PC is more than 0.3%, the adsorption rate of latex particles is reduced significantly; when the dosage of NF is 1%, the adsorption rate of latexes is reduced less than that in the case of PC.

scholarly journals Membrane fouling remediation in ultrafiltration of latex contaminated wastewater

2015 ◽  
Vol 51 (3) ◽  
pp. 256-269 ◽  
Author(s):  
Amira Abdelrasoul ◽  
Huu Doan ◽  
Ali Lohi
Keyword(s):  
Ionic Strength ◽  
Zeta Potential ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Cross Flow ◽  
Flow Mode ◽  
High Concentration ◽  
Alkyl Benzene Sulfonate ◽  
Latex Particles ◽  
Constant Flow Rate

The current study aimed to remediate membrane fouling by latex effluent by altering membrane surface charge or ionic strength of the effluent. Hydrophilic polysulfone and Ultrafilic flat membranes, with molecular weight cutoff (MWCO) of 60,000 and 100,000, respectively, and hydrophobic polyvinylidene difluoride membrane (PVDF; MWCO 100,000) were used under a constant flow rate and in cross-flow mode for ultrafiltration of latex effluent. The effect of linear alkyl benzene sulfonate (LAS) on the ionic strength of the effluent and the zeta potential of latex particles was investigated. LAS was also used to improve the anti-fouling properties of the membrane surface. The ionic strength of latex effluent was increased by raising its pH from 7 to 12, resulting in an increase of the zeta potential negativity of the latex particles from −26.61 to −42.66 mV. LAS was found to be an ineffective pretreatment for limiting the fouling propensity of latex effluent using hydrophilic membranes even at high concentration and long treatment times. It was concluded that LAS-treated membrane surface is much more favorable than pH changed feed pretreatment. The total mass of fouling decreased by 44.00 and 29.60%, when PVDF membrane surface was treated with LAS at a concentration of 1 × 10−4 g/L, and latex effluent at pH 11 was used, respectively.

Human Fibrinogen Adsorption on Positively Charged Latex Particles

Langmuir ◽  
2014 ◽  
Vol 30 (37) ◽  
pp. 11165-11174 ◽  
Author(s):  
Paulina Żeliszewska ◽  
Anna Bratek-Skicki ◽  
Zbigniew Adamczyk ◽  
Michał Cieśla
Keyword(s):  
Human Fibrinogen ◽  
Latex Particles ◽  
Positively Charged ◽  
Fibrinogen Adsorption

A Freeze Shadow Technique for the Preparation of Soft Paint Latexes for Electron Microscopy

1977 ◽  
Vol 35 ◽  
pp. 314-315
Author(s):  
Earl R. Walter ◽  
Glen H. Bryant
Keyword(s):  
Sample Preparation ◽  
High Vacuum ◽  
Vacuum System ◽  
Latex Particles ◽  
New Methods ◽  
Diffusion Pump ◽  
Film Forming ◽  
Routine Basis ◽  
Distribution Studies ◽  
Preparation Techniques

With the development of soft, film forming latexes for use in paints and other coatings applications, it became desirable to develop new methods of sample preparation for latex particle size distribution studies with the electron microscope. Conventional latex sample preparation techniques were inadequate due to the pronounced tendency of these new soft latex particles to distort, flatten and fuse on the substrate when they dried. In order to avoid these complications and obtain electron micrographs of undistorted latex particles of soft resins, a freeze-dry, cold shadowing technique was developed. The method has now been used in our laboratory on a routine basis for several years.The cold shadowing is done in a specially constructed vacuum system, having a conventional mechanical fore pump and oil diffusion pump supplying vacuum. The system incorporates bellows type high vacuum valves to permit a prepump cycle and opening of the shadowing chamber without shutting down the oil diffusion pump. A baffeled sorption trap isolates the shadowing chamber from the pumps.

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