Article (Scientific journals)
Preparation of poly-D,L-lactide based nanocomposites with polymer-grafted silica by melt blending: Study of molecular, morphological, and mechanical properties
Regibeau, Nicolas; Tilkin, Rémi; Grandfils, Christian et al.
2021In Polymer Composites, 42 (2), p. 955-972
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Keywords :
aliphatic polyesters; poly-D,L-lactide; nanocomposites; melt blending; grafting from; grafting to
Abstract :
[en] Polylactide was first designed for the pharmaceutical and medical fields. Unfortunately, polylactide, especially poly-D,L-lactide (PDLLA), presents too low mechanical properties for a wide range of applications. The addition of silica nanoparticles should reinforce the mechanical strength of PDLLA. In order to improve silica/polymer interactions, this study focused on the preparation of polymer chain grafted silica using two grafting methods. The first strategy relied upon the ring opening polymerization of D,L-lactide on initiating silica surface (i.e. “grafting from”). The second approach considered a sol-gel synthesis process in presence of Si-OR terminated polylactide chains to promote grafting of these chains on new silica particles (i.e. “grafting to” method). Only “grafting from” silica successfully led to a nanoscale dispersion into the polyester matrix for silica content up to 5 wt%. A 3 wt% content of this silica allowed improving Young modulus of 106.0 % and ultimate tensile stress (UTS) of 63.7 % compared to the PDLLA control.
Disciplines :
Chemistry
Materials science & engineering
Chemical engineering
Author, co-author :
Regibeau, Nicolas ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie générales, et biochimie humaine
Tilkin, Rémi  ;  Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry
Grandfils, Christian ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie générales, et biochimie humaine
Heinrichs, Benoît ;  Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Language :
English
Title :
Preparation of poly-D,L-lactide based nanocomposites with polymer-grafted silica by melt blending: Study of molecular, morphological, and mechanical properties
Publication date :
2021
Journal title :
Polymer Composites
ISSN :
0272-8397
eISSN :
1548-0569
Publisher :
Wiley
Volume :
42
Issue :
2
Pages :
955-972
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 November 2020

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