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Grafting Polycaprolactone Diol Onto Cellulose Nanocrystals via Click Chemistry: Enhancing Thermal Stability and Hydrophobic Property

Grafting Polycaprolactone Diol Onto Cellulose Nanocrystals via Click Chemistry: Enhancing Thermal Stability and Hydrophobic Property

Ling Zhou, Hui He, Mei-Chun Li, Siwei Huang, Changtong Mei, Qinglin Wu

Carbohydr Polym. 2018 Jun 1;189:331-341.

PMID: 29580417

Abstract:

Hydrophobic and thermally-stable cellulose nanocrystals (CNCs) were synthesized by polycarpolactone diol (PCL diol) grafting via click chemistry strategy. The synthesis was designed as a three-step procedure containing azide-modification of CNCs, alkyne-modification of PCL diol and sequent copper(I)-catalyzed azide-alkyne cycloaddition reaction. The structure of azide-modified CNCs and alkyne-modified PCL diol, the structure, hydrophobic ability and thermal stability of click products CNC-PCL were characterized. FTIR, XPS and H1 NMR results indicated a successful grafting of the N3 groups onto the CNCs, synthesis of PCL diol-CCH, and formation of the CNC-PCL material. CNC-PCL had enhanced dispersion in the non-polar solvent chloroform owing to the well-maintained microscale size and PCL-induced hydrophobic surface. The thermal stability of CNC-PCL was largely increased due to the grafting of thermally-stable PCL. This work demonstrates that click chemistry is an attractive modification strategy to graft CNCs with polyester chains for further potential application in polymer composites.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP36890683	Polycaprolactone diol		36890-68-3	Price

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