2 research outputs found
Degradation under composting conditions of lysine-modified polyurethane based on PCL obtained by lipase biocatalysis
Enzymatic polymerization has a large potential as an environmentally friendly synthetic process. Lipase is a renewable catalyst with high catalytic activity from which it is possible to develop a versatile method for the production of sustainable polyurethanes. In this work oligomeric PCL-diol was synthesized using biocatalysis with immobilized Yarrowia lipolytica lipase (YLL) and diethyleneglycol as initiator. Then, two different linear polyurethanes were prepared. One was obtained directly from the previous synthesized PCL-diol and hexamethylene diisocyanate, named PU, and the other one has been obtained by incorporating L-lysine amino acid as end group (lys-PU). PU and lys-PU disintegration under composting conditions was evaluated. The influence of the presence of L-lysine on the disintegration performance of PU was studied by evaluating the disintegration degree, monitoring the weight loss. Structural and morphological changes were followed by Fourier transformed infrared spectroscopy (FTIR) and by scanning electron microscopy (SEM).Authors thank Spanish Ministry of Economy, Industry and
Competitiveness, MINEICO, ( and MAT2013-48059-C2-1-R
MAT2017-88123-P) cofinanced with FEDER funds, Regional Government
of Madrid (S2013/MIT-2862) and Consejo Nacional de
Ciencia y Tecnología (CONACYT, Grant 153922) for the financial
support. M.P. Arrieta and L. Peponi acknowledge the Juan de la
Cierva (FJCI-2014-20630) and Ramon y Cajal (RYC-2014-15595)
contracts from the MINECO, respectively. Authors also acknowledge
Prof. Juan López Martínez (Universitat Politécnica de Valencia,
Spain) for his assistance with colorimetric measurements.Peer Reviewe