One-shot TEMPO-periodate oxidation of native cellulose

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

TEMPO/NaClO/NaBr and sodium periodate were combined in a one-shot reaction to oxidise cellulose from bleached pulp. Oxidation of cellulose forms two fractions: a highly-carboxylated water-insoluble (up to 1.9 mmol COO/g, DS = 0.39) and a water-soluble fraction (up to 4 mmol COO/g, DS = 1.1). Results show that these regioselective oxidants work in synergy to produce fully-oxidised 2,3,6-tricarboxycellulose. Increasing the periodate concentration results in fibrillation and extensive depolymerisation of the pulp cellulose as more residual aldehyde groups participate in the depolymerisation process. X-ray diffraction (XRD) reveals that the addition of periodate increases cellulose crystallinity, retains crystal size but slightly alters the XRD pattern. The degree of substitution (DS), which governs the solubility of carboxylated cellulose, can be controlled by varying the periodate concentration. Combining TEMPO/NaBr/NaClO with sodium periodate simultaneously in a one-shot reaction produces low-cost cellulose with controlled level of carboxylation and unique properties.

Original languageEnglish
Article number115292
Number of pages10
JournalCarbohydrate Polymers
Volume226
DOIs
Publication statusPublished - 15 Dec 2019

Keywords

  • Carboxylated cellulose
  • Degree of polymerisation (DP)
  • Degree of substitution (DS)
  • Periodate
  • Solubility
  • TEMPO

Cite this

@article{6e03f35e6c9448afba50644f8997c41c,
title = "One-shot TEMPO-periodate oxidation of native cellulose",
abstract = "TEMPO/NaClO/NaBr and sodium periodate were combined in a one-shot reaction to oxidise cellulose from bleached pulp. Oxidation of cellulose forms two fractions: a highly-carboxylated water-insoluble (up to 1.9 mmol COO−/g, DS = 0.39) and a water-soluble fraction (up to 4 mmol COO−/g, DS = 1.1). Results show that these regioselective oxidants work in synergy to produce fully-oxidised 2,3,6-tricarboxycellulose. Increasing the periodate concentration results in fibrillation and extensive depolymerisation of the pulp cellulose as more residual aldehyde groups participate in the depolymerisation process. X-ray diffraction (XRD) reveals that the addition of periodate increases cellulose crystallinity, retains crystal size but slightly alters the XRD pattern. The degree of substitution (DS), which governs the solubility of carboxylated cellulose, can be controlled by varying the periodate concentration. Combining TEMPO/NaBr/NaClO with sodium periodate simultaneously in a one-shot reaction produces low-cost cellulose with controlled level of carboxylation and unique properties.",
keywords = "Carboxylated cellulose, Degree of polymerisation (DP), Degree of substitution (DS), Periodate, Solubility, TEMPO",
author = "Mendoza, {David Joram} and Christine Browne and Raghuwanshi, {Vikram Singh} and Simon, {George P.} and Gil Garnier",
year = "2019",
month = "12",
day = "15",
doi = "10.1016/j.carbpol.2019.115292",
language = "English",
volume = "226",
journal = "Carbohydrate Polymers",
issn = "0144-8617",
publisher = "Elsevier",

}

One-shot TEMPO-periodate oxidation of native cellulose. / Mendoza, David Joram; Browne, Christine; Raghuwanshi, Vikram Singh; Simon, George P.; Garnier, Gil.

In: Carbohydrate Polymers, Vol. 226, 115292, 15.12.2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - One-shot TEMPO-periodate oxidation of native cellulose

AU - Mendoza, David Joram

AU - Browne, Christine

AU - Raghuwanshi, Vikram Singh

AU - Simon, George P.

AU - Garnier, Gil

PY - 2019/12/15

Y1 - 2019/12/15

N2 - TEMPO/NaClO/NaBr and sodium periodate were combined in a one-shot reaction to oxidise cellulose from bleached pulp. Oxidation of cellulose forms two fractions: a highly-carboxylated water-insoluble (up to 1.9 mmol COO−/g, DS = 0.39) and a water-soluble fraction (up to 4 mmol COO−/g, DS = 1.1). Results show that these regioselective oxidants work in synergy to produce fully-oxidised 2,3,6-tricarboxycellulose. Increasing the periodate concentration results in fibrillation and extensive depolymerisation of the pulp cellulose as more residual aldehyde groups participate in the depolymerisation process. X-ray diffraction (XRD) reveals that the addition of periodate increases cellulose crystallinity, retains crystal size but slightly alters the XRD pattern. The degree of substitution (DS), which governs the solubility of carboxylated cellulose, can be controlled by varying the periodate concentration. Combining TEMPO/NaBr/NaClO with sodium periodate simultaneously in a one-shot reaction produces low-cost cellulose with controlled level of carboxylation and unique properties.

AB - TEMPO/NaClO/NaBr and sodium periodate were combined in a one-shot reaction to oxidise cellulose from bleached pulp. Oxidation of cellulose forms two fractions: a highly-carboxylated water-insoluble (up to 1.9 mmol COO−/g, DS = 0.39) and a water-soluble fraction (up to 4 mmol COO−/g, DS = 1.1). Results show that these regioselective oxidants work in synergy to produce fully-oxidised 2,3,6-tricarboxycellulose. Increasing the periodate concentration results in fibrillation and extensive depolymerisation of the pulp cellulose as more residual aldehyde groups participate in the depolymerisation process. X-ray diffraction (XRD) reveals that the addition of periodate increases cellulose crystallinity, retains crystal size but slightly alters the XRD pattern. The degree of substitution (DS), which governs the solubility of carboxylated cellulose, can be controlled by varying the periodate concentration. Combining TEMPO/NaBr/NaClO with sodium periodate simultaneously in a one-shot reaction produces low-cost cellulose with controlled level of carboxylation and unique properties.

KW - Carboxylated cellulose

KW - Degree of polymerisation (DP)

KW - Degree of substitution (DS)

KW - Periodate

KW - Solubility

KW - TEMPO

UR - http://www.scopus.com/inward/record.url?scp=85072243235&partnerID=8YFLogxK

U2 - 10.1016/j.carbpol.2019.115292

DO - 10.1016/j.carbpol.2019.115292

M3 - Article

AN - SCOPUS:85072243235

VL - 226

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

M1 - 115292

ER -