Modified iterative vector similarity measure for particle size analysis based on forward light scattering

2016 ◽  
Vol 55 (23) ◽  
pp. 6183 ◽  
Author(s):  
Tian’en Wang ◽  
Jianqi Shen ◽  
Chengjun Lin

2015 ◽  
Vol 54 (13) ◽  
pp. 3855 ◽  
Author(s):  
Bin Hu ◽  
Jianqi Shen ◽  
Tianxiong Duan




Author(s):  
Mathieu Balcaen ◽  
Lorenz De Neve ◽  
Koen Dewettinck ◽  
Paul Van der Meeren


TAPPI Journal ◽  
2019 ◽  
Vol 18 (4) ◽  
pp. 223-231
Author(s):  
GUOMIN WU ◽  
QIAN LI ◽  
CAN JIN ◽  
ZHENWU KONG ◽  
SIQUN WANG

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.



1997 ◽  
Vol 20 (1) ◽  
pp. 63 ◽  
Author(s):  
RC Chaney ◽  
KR Demars ◽  
SJ Vitton ◽  
LY Sadler


2007 ◽  
Vol 1019 ◽  
Author(s):  
Dania Alyounes ◽  
Christopher Yengo ◽  
Tim Doran ◽  
Qi Lu ◽  
Kenneth Gonsalves

AbstractPluronic® polymers were screened for binding affinity to oligoribonucleotides (ORN) using fluorescence techniques. F127 (Mw 12600 g/mole) proved to have the strongest binding affinity. Urethane linkages were introduced into F127 and two other Pluronics, F38 (Mw 4700 g/mole) and F77 (Mw 6600 g/mole) to prepare polymers that were multiples of their respective initial molecular weights. A series of these polyurethane Pluronics were screened for binding affinity. Fluorescence studies showed a relationship between the molecular weight of the PO units and the binding affinity in the structures of the newly synthesized polyPluronics, especially in the case of F77. Light scattering confirmed the binding affinity between the ORN and F77 polymers. Particle size analysis showed an exponential increase until the critical micelle concentration. Other analogs of these polymers also studied for their binding affinity were poly(ester amines) and PINC.



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