NDLI: Effects of pH on aggregation behavior of sodium lignosulfonate (NaLS) in concentrated solutions

Content Provider	Springer Nature Link
Author	Tang, Qianqian Zhou, Mingsong Yang, Dongjie Qiu, Xueqing
Copyright Year	2015
Abstract	Concentrated sodium lignosulfonate (NaLS) solutions have wide industrial applications. Therefore, their aggregation behavior at different pH (2.89–11.81) was investigated by means of rheology, conductivity, acid–base titration, and zeta potential measurements. It was found that all the NaLS solutions were pseudoplastic fluids. In the pH range of 2.89–10.34, higher pH resulted in increased viscosity, pseudoplasticity, and thixotropy. The dynamic viscoelastic measurements characterized by frequency and temperature sweeps showed that the storage modulus, loss modulus, and complex viscosity increased, but the loss tangent and the crossover temperature where storage modulus equaled loss modulus decreased with increasing pH. The change in rheological properties as a function of pH may be related to the molecular expansion effect. The conductivity, acid–base titration, and zeta potential measurements revealed the formation of a larger and higher-strength network structure at pH 2.89–10.34 as a result of the ionization of sulfonic, carboxyl, and phenolic hydroxyl groups. As the pH exceeded 10.34, NaLS solutions exhibited decreased viscosity, pseudoplasticity, thixotropy, and elasticity, and the aggregation effect weakened, which may be caused by the electrostatic repulsive forces becoming too strong and disruption of hydrogen bonds.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	10229760
Journal	Journal of Polymer Research
Volume Number	22
Issue Number	4
e-ISSN	15728935
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-03-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sodium lignosulfonate Concentrated solutions pH Aggregation Conformation Rheology Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Materials Chemistry Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

Stabilization of bulk aggregation state in semiconducting polymer solutions

Collagen-g-poly(Sodium Acrylate-co-Acrylamide)/sodium montmorillonite superabsorbent nanocomposites: synthesis and swelling behavior

The Smectic Rheology of a Polysiloxane Side Chain Liquid Crystalline Polymer

Influence of the conformation of biopolyelectrolytes on the morphological structure of their interpolymer complexes

Synthesis and characterization of pH-responsive carboxymethyl chitosan-g-polyacrylic acid hydrogels

Short chain chitosan solutions: self-assembly and aggregates disruption effects

Particle shape dependence of rheological behavior for colloid-polymer mixtures

A conformation study of polyelectrolyte-dendritic surfactant complexes in dilute solutions

Effects of pH on aggregation behavior of sodium lignosulfonate (NaLS) in concentrated solutions

Similar Documents

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

Stabilization of bulk aggregation state in semiconducting polymer solutions

Collagen-g-poly(Sodium Acrylate-co-Acrylamide)/sodium montmorillonite superabsorbent nanocomposites: synthesis and swelling behavior

The Smectic Rheology of a Polysiloxane Side Chain Liquid Crystalline Polymer

Influence of the conformation of biopolyelectrolytes on the morphological structure of their interpolymer complexes

Synthesis and characterization of pH-responsive carboxymethyl chitosan-g-polyacrylic acid hydrogels

Short chain chitosan solutions: self-assembly and aggregates disruption effects

Particle shape dependence of rheological behavior for colloid-polymer mixtures

A conformation study of polyelectrolyte-dendritic surfactant complexes in dilute solutions

Effects of pH on aggregation behavior of sodium lignosulfonate (NaLS) in concentrated solutions