Phosphonated nanocelluloses from sequential oxidative-reductive treatment-Physicochemical characteristics and thermal properties

Carbohydrate Polymers
Juho Antti SirviöOsmo Hormi

Abstract

Nanocellulosic materials with good thermal stability are highly desirable for applications, such as reinforcement and filler agents in composites. In the present work, phosphonated cellulose was utilized to obtain nanocelluloses with good thermal stability and potential intumescent properties. Phosphonated cellulose was synthetized from birch pulp via sequential periodate oxidation and reductive amination using a bisphosphonate group-containing amine, sodium alendronate, as a phosphonating reagent. After high-pressure homogenization, bisphosphonate cellulose nanofibres or nanocrystals were obtained, depending on the initial oxidation degree. Nanofibres had a typical diameter of 3.8nm and length of several micrometers, whereas nanocrystals exhibited a width of about 6nm and an average length of 103-129nm. All nanocelluloses exhibited cellulose I crystalline structures and high transparency in water solutions. Phosphonated nanocelluloses exhibited good thermal stability and a greater amount of residual char was formed at 700°C compared to birch pulp and mechanically produced, non-chemically modified NFC.

References

Nov 17, 2001·Biomacromolecules·U J KimT Kondo
Jan 20, 2007·Journal of Controlled Release : Official Journal of the Controlled Release Society·Hila EpsteinGershon Golomb
Jan 12, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Lars WågbergKarl Axnäs
May 21, 2011·Angewandte Chemie·Dieter KlemmAnnie Dorris
Apr 20, 2012·Biomacromolecules·Henrikki LiimatainenJouko Niinimaki
Mar 21, 2013·Nanoscale·Zhijun ShiGuang Yang
Jan 16, 2014·Food Chemistry·Juho Antti SirviöOsmo E O Hormi
Jun 18, 2014·Nanoscale·Samuel Eyley, Wim Thielemans
Jul 20, 2014·Carbohydrate Polymers·Shaobo Pan, Arthur J Ragauskas
Aug 5, 2014·ACS Applied Materials & Interfaces·Juho Antti SirviöOsmo E O Hormi

❮ Previous
Next ❯

Citations

Aug 19, 2015·ACS Applied Materials & Interfaces·Juho Antti SirviöHenrikki Liimatainen
Aug 2, 2016·Biomacromolecules·Juho Antti SirviöHenrikki Liimatainen
Nov 10, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ewa Chmielewska, Paweł Kafarski
Apr 17, 2018·Chemical Society Reviews·E Johan FosterJeff Youngblood
Aug 29, 2018·Small·Kaitao Zhang, Henrikki Liimatainen
Jan 20, 2021·ACS Biomaterials Science & Engineering·Akihiro Nishiguchi, Tetsushi Taguchi
Feb 26, 2020·International Journal of Biological Macromolecules·A TshikovhiAjay K Mishra

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.