Surface-Modified Cellulose Nanofibers-graft-poly(lactic acid)s Made by Ring-Opening Polymerization of l-Lactide

Chaniga Chuensangjun, Kyohei Kanomata, Takuya Kitaoka, Yusuf Chisti, Sarote Sirisansaneeyakul

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Highly crystalline cellulose nanofibers with a high density of carboxylate groups only on the surfaces were prepared from both softwood and non-wood cellulose pulp. The preparation method used 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation of native cellulose fibrils in an aqueous TEMPO/NaBr/NaClO system and subsequent postoxidation with NaClO 2 in acetate buffer (pH 4.8). The TEMPO-oxidized cellulose nanofibers (TOCNs) possessed a carboxylate content of 1.7 mmol g −1 and a crystallinity of 67–69% with a crystallite size of ∼3 nm. The TOCNs were used to produce highly crystalline TOCN-graft-poly(lactic acid) (PLA) nanocomposites via ring-opening polymerization of l-lactide in a polar aprotic solvent. Effects of the reaction temperature and the molar ratio of l-lactide to carboxylate surface groups, on the efficiency of surface grafting were investigated to potentially improve the crystallinity and thermal properties of the nanocomposites. The crystallinity of TOCN-g-PLA products was 59–66% greater than the crystallinity of neat PLA.

Original languageEnglish
Pages (from-to)847-861
Number of pages15
JournalJournal of Polymers and the Environment
Volume27
Issue number4
DOIs
Publication statusPublished - Apr 15 2019

Fingerprint

Ring opening polymerization
Lactic acid
Nanofibers
oxidized cellulose
Grafts
Cellulose
Nanocomposites
Crystalline materials
Softwoods
Crystallite size
Pulp
poly(lactic acid)
TEMPO
dilactide
Buffers
Acetates
Thermodynamic properties
Oxidation

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Surface-Modified Cellulose Nanofibers-graft-poly(lactic acid)s Made by Ring-Opening Polymerization of l-Lactide. / Chuensangjun, Chaniga; Kanomata, Kyohei; Kitaoka, Takuya; Chisti, Yusuf; Sirisansaneeyakul, Sarote.

In: Journal of Polymers and the Environment, Vol. 27, No. 4, 15.04.2019, p. 847-861.

Research output: Contribution to journalArticle

Chuensangjun, Chaniga ; Kanomata, Kyohei ; Kitaoka, Takuya ; Chisti, Yusuf ; Sirisansaneeyakul, Sarote. / Surface-Modified Cellulose Nanofibers-graft-poly(lactic acid)s Made by Ring-Opening Polymerization of l-Lactide. In: Journal of Polymers and the Environment. 2019 ; Vol. 27, No. 4. pp. 847-861.
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