RT Journal Article
T1 Lignin microparticle coatings for enhanced wet resistance in lignocellulosic materials
A1 Sánchez Salvador, José Luis
A1 Mattson, Amanda
A1 Pettersson, Gunilla
A1 Blanco Suárez, María Ángeles
A1 Engstrand, Per
A1 Negro Álvarez, Carlos Manuel
AB The widespread use of synthetic plastics in packaging materials poses significant environmental challenges, prompting the search for biobased, biodegradable, and non-toxic alternatives. This study focuses on improving high-yield pulps (HYPs) as sustainable materials for packaging. Enhancing wet strength and barrier properties of papers from bleached chemi-thermomechanical pulps (BCTMPs) is crucial for their application in water- and air- resistant wrappers. Traditional wet strength agents raise environmental and health concerns; therefore, this research explores the use of lignin, in the form of microparticles (LMPs), as a natural biopolymer that offers a safer alternative. However, the low viscosity of LMPs hampers their dispersion as a coating, requiring thickening agents (such as cationic starch (CS), chitosan (CH) or sodium alginate) for an effective coating formulation. Results demonstrate a synergistic effect of LMP coatings with CH or CS, enhanced by hot-pressing at 260 °C for 30 s, which improves dry and wet mechanical properties and decreases air permeability. The use of LMPs as a water-resistant interlayer between BCTMP paper sheets further improves the wet tensile index to 40 kN·m/kg for CH + LMPs and 23 kN·m/kg for CS + LMPs interlayer, representing 55 and 38 % of their respective dry tensile indices.
PB Elsevier
YR 2024
FD 2024-11-02
LK https://hdl.handle.net/20.500.14352/110390
UL https://hdl.handle.net/20.500.14352/110390
LA eng
NO Jose Luis Sanchez-Salvador, Amanda Mattsson, Gunilla Pettersson, Angeles Blanco, Per Engstrand, Carlos Negro, Lignin microparticle coatings for enhanced wet resistance in lignocellulosic materials, International Journal of Biological Macromolecules, Volume 282, Part 4, 2024, 137243, ISSN 0141-8130, https://doi.org/10.1016/j.ijbiomac.2024.137243.
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 10 abr 2025