RT Journal Article
T1 Amino-Modified Halloysite Nanotubes to Reduce Polymer Degradation and Improve the Performance of Mechanically Recycled Poly(lactic acid)
A1 Beltrán González, Freddys
A1 Orden Hernández, María Ulagares De La
A1 Martínez Urreaga, Joaquín
AB From an environmental point of view, mechanical recycling is, in general, a good end-of-life option for poly(lactic acid) (PLA), one of the most important biobased polymers. However, the degradation of PLA during the service life and, especially, during the mechanical recycling process, leads to a decrease in the properties of PLA, thus reducing the applications of the recycled plastic. The main aim of this work was to study the addition of small amounts of halloysite nanotubes, during the recycling step, as the basis of a cost-effective method for improving the properties of the recycled PLA. Raw halloysite was modified with an aminosilane, and 2% by weight of both raw and modified halloysite were melt compounded with PLA previously subjected to accelerated ageing. The addition of the nanotubes led to recycled materials with improved properties because halloysite reduces the degradation of PLA by blocking the carboxyl groups, generated during the ageing and washing steps, which catalyze the degradation during the recycling process. This effect was more intense in the silanized nanotubes, because the carboxyl groups were effectively blocked by acid–base interactions with the amino groups of the chemical modification. The properties of the recycled plastic with only 2 wt% of silanized halloysite were very close to those of the virgin plastic.
PB Springer US
SN 1566-2543
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/12997
UL https://hdl.handle.net/20.500.14352/12997
LA eng
NO Published online: 16 July 2018
NO Ministerio de Economía y Competitividad de España (MINECO)
NO Universidad Politécnica de Madrid
NO Universidad Complutense de Madrid
DS Docta Complutense
RD 12 abr 2025