Particle size analysis. Dynamic light scattering (DLS)

2017 ◽  
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Particle Size Analysis ◽  
Size Analysis

Characterization of the redispersibility of cellulose nanocrystals by particle size analysis using dynamic light scattering

TAPPI Journal ◽  
2019 ◽  
Vol 18 (4) ◽  
pp. 223-231
Author(s):  
GUOMIN WU ◽  
QIAN LI ◽  
CAN JIN ◽  
ZHENWU KONG ◽  
SIQUN WANG
Keyword(s):  
Particle Size ◽  
Sulfuric Acid ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Acid Hydrolysis ◽  
Convenient Method ◽  
Cellulose Nanocrystals ◽  
High Speed ◽  
Particle Size Analysis ◽  
Size Analysis

Cellulose nanocrystals (CNCs), which are derived from the most abundant and inexhaustible natural polymer, cellulose, have received significant interest owing to their mechanical, optical, chemical, and rheological properties. In order to transport CNC products conveniently and efficiently, they are ideally dried and stored as powders using freeze-drying or spray-drying technologies. The redispersibility of CNC powders is quite important for their end use; hence, a convenient method is required to characterize the redispersibility of CNC powders. In this paper, the possibility of characterizing the redispersibility of CNC powders by particle size analysis using dynamic light scattering (DLS) was investigated by comparing the results from transmission electron microscopy (TEM) and DLS. The particle size obtained with DLS approximately matched that obtained with TEM. Compared with TEM, DLS is a quick and convenient method to measure the particle size distribution of CNCs in water. Two kinds of dispersing methods, sonication and high-speed shearing, and two kinds of CNCs prepared by different methods, sulfuric acid hydrolysis and the TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) oxidization method, were used to study the redispersibility of CNCs. Sonication was more efficient than the high-speed shearing method for nanoscale dispersion of CNC powders in water. CNCs prepared by sulfuric acid hydrolysis could be more easily redispersed in water than those prepared by TEMPO oxidation.

scholarly journals Effect of Temperature on 60nm and 100nm Nanosphere Size Standard using Dynamic Light Scattering

2019 ◽  
Vol 9 (2) ◽  
pp. 3284-3286
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Particle Size Analysis ◽  
Polystyrene Latex ◽  
Effect Of Temperature ◽  
Size Analysis ◽  
Measurement Tool ◽  
Scattering Mechanism ◽  
Polystyrene Latex Nanoparticles

It is difficult to use kinetic motion as a measurement tool without temperature affecting the results. In this study, the size of a known nanosphere was used to monitor the effect of temperature towards particle size determination using dynamic light scattering principles. Temperature deviations are always picked up by size measurement using the principle of Brownian motion. The particle size of 60nm and 100nm polystyrene latex nanoparticles in 10mM NaCl solution was measured at four different temperatures set points of 20, 25, 30, 35 and 40°C using dynamic light scattering mechanism. As a result, the size of polystyrene latex nanoparticles was increased with the increases of the temperature. Therefore, for particle size analysis using dynamic light scattering mechanism the temperature of the test must be maintained at 25°C in order to obtain accurate measurement.

scholarly journals Application of Voltage in Dynamic Light Scattering Particle Size Analysis

10.3791/60257 ◽  
2020 ◽  
Author(s):  
Tianyu Ren ◽  
Emma J. Roberge ◽  
John R. Csoros ◽  
W. Rudolph Seitz ◽  
Eva Rose M. Balog ◽  
...  
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Particle Size Analysis ◽  
Size Analysis
Sign in / Sign up

Export Citation Format

Share Document