Abstract：
:In this study, cellulose nanocrystals (CNCs) with PEG grafts of various lengths (1 k, 2 k, 5 k, and 10 kDa) were prepared via a polydopamine (PDA) mediated method in the aqueous solution. The prepared CNC-PEGs were further used to reinforce the polyvinyl alcohol (PVA) at the loading of 0, 1, 3, 5, and 7 wt% in order to demonstrate the effects of the PEG length on the properties of the PVA/CNC nanocomposites. PEG surface modification resulted in simultaneous improvements in stiffness and toughness. The graft lengths have noticeable impacts on the properties of composites. The shorter graft yields better enhancement in strength and stiffness, attributable to the high efficiency in the stress transfer and high interface adhesion. The longer PEG graft length yields high graft-matrix entanglement, forming a thicker rubbery coating layer that enhances the toughness of PVA/CNC composites.
journal_name
Carbohydr Polymjournal_title
Carbohydrate polymersauthors
Zheng T,Clemons CM,Pilla Sdoi
10.1016/j.carbpol.2021.118405keywords:
["Cellulose","Graft length","Nanocrystal","Natural fibre composites","Polydopamine"]subject
Has Abstractpub_date
2021-11-01 00:00:00pages
118405eissn
0144-8617issn
1879-1344pii
S0144-8617(21)00792-Xjournal_volume
271pub_type
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