NDLI: Gel point as a measure of cellulose nanofibre quality and feedstock development with mechanical energy

Content Provider	Springer Nature Link
Author	Raj, Praveena Mayahi, Alireza Lahtinen, Panu Varanasi, Swambabu Garnier, Gil Martin, Darren Batchelor, Warren
Copyright Year	2016
Abstract	The gel point is the lowest solids content at which a fibre suspension forms a continuously connected network and is related to the fibre aspect ratio. In this paper we firstly investigated the conditions required to accurately measure a gel point using sedimentation. We found that very heavily treated cellulose nanofibres can produce anomalous sedimentation data, due to the electrostatic repulsion from fibre surface charges dominating the gravity driven sedimentation. Screening the anionic surface charges by adding high levels of Na+ or Ca2+ ions reduced the electrostatic interactions between the fibres and allowed them to settle normally. Gel point measurement was then used to probe the development of nanofibre quality with increasing energy input for three different feedstocks: eucalypt kraft pulp, commercial microfibrillated cellulose and de-lignified, bleached spinifex pulp. By combining the data of the aspect ratio and average diameter, determined from SEM and TEM, we were able to compare the differences in feedstock processability. The aspect ratio of all three feedstocks increased with increasing homogenisation energy, showing that the fibre delamination dominated over fibre shortening. The slope of the aspect ratio versus energy consumption showed the ease of processing of each sample. The spinifex fibres had the fastest rate of aspect ratio increase and therefore were the most processable. Gel point is an excellent tool to track quality development of nanocellulose through processing and to compare the potential of different feedstocks for nanocellulose production.
Starting Page	3051
Ending Page	3064
Page Count	14
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	23
Issue Number	5
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-08-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanical treatment Homogenisation Energy consumption Fibre quality Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	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

Estimation of cellulose nanofibre aspect ratio from measurements of fibre suspension gel point

Engineering cellulose nanofibre suspensions to control filtration resistance and sheet permeability

Superior non-woven sheet forming characteristics of low-density cationic polymer-cellulose nanofibre colloids

Agriculture crop residues as a source for the production of nanofibrillated cellulose with low energy demand

Cellulose man-made fibre reinforced polypropylene—correlations between fibre and composite properties

Isolation of cellulose nanofibrils from Triodia pungens via different mechanical methods

Physicomechanical properties of nanocomposites based on cellulose nanofibre and natural rubber latex

Carboxymethylated nanofibrillated cellulose: rheological studies

Energy requirements for the disintegration of cellulose fibers into cellulose nanofibers

Gel point as a measure of cellulose nanofibre quality and feedstock development with mechanical energy

Similar Documents

Estimation of cellulose nanofibre aspect ratio from measurements of fibre suspension gel point

Engineering cellulose nanofibre suspensions to control filtration resistance and sheet permeability

Superior non-woven sheet forming characteristics of low-density cationic polymer-cellulose nanofibre colloids

Agriculture crop residues as a source for the production of nanofibrillated cellulose with low energy demand

Cellulose man-made fibre reinforced polypropylene—correlations between fibre and composite properties

Isolation of cellulose nanofibrils from Triodia pungens via different mechanical methods

Physicomechanical properties of nanocomposites based on cellulose nanofibre and natural rubber latex

Carboxymethylated nanofibrillated cellulose: rheological studies

Energy requirements for the disintegration of cellulose fibers into cellulose nanofibers

Gel point as a measure of cellulose nanofibre quality and feedstock development with mechanical energy