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Estudio experimental de la hidroximetilación del lignosulfonato de sodio proveniente de Eucalyptus grandis destinado a la modificación de resoles
(2015-10-20)
Las ligninas son polímeros naturales renovables que provienen en su mayoría de desechos de la industria papelera. Debido a sus características estructurales similares al fenol (derivado del petróleo, de importación en ...
Effect of Kraft Lignin from Hardwood on Viscoelastic, Thermal, Mechanical and Aging Performance of High Pressure Laminates.
(Waste and Biomass Valorization, 2017-07-10)
In this work, the synthesis and characterization
of phenol-formaldehyde resols modified with 10, 20 and
30 wt% of Kraft lignin (a waste from pulp industry) from
hardwood were studied. In all cases, the Kraft lignin ...
Technical lignins modified by hydroxymethylation for the production of decorative laminates: Synthesis, characterization and mathematical modelling
(2017-03)
Technical lignins are natural and renewable poly-phenolic polymers obtained mainly as a subproduct from the pulp industry. It presents a complex structure that depends on the wood type and the pulping process adopted to ...
Propiedades viscoelásticas de laminados basados en resinas de fenol-formaldehído modificadas con lignina del tipo Kraft
(2015-10-20)
Las resinas de fenol-formaldehído son ampliamente utilizadas en la obtención de laminados
decorativos. El alto costo y la toxicidad del fenol empleado en la formulación de resinas fenólicas
incentiva la búsqueda de nuevas ...
Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
(2019-02-16)
This work investigates the valorization of sodium lignosulfonate, kraft, and organosolv lignins from South America. A detailed characterization of the lignins and their chemical modification by hydroxymethylation, a reaction ...
Microparticles based on ionic and organosolv lignins for the controlled release of atrazine
(Journal of Hazaourdos Materials, 2018-07-02)
Lignins are natural polymers of the lignocellulosic biomass. Nowadays, there is a growing interest in developing value-added products based on lignins due to their renewability, low cost and abundance. In this work, ...
Mechanical evaluation of laminates based on phenolic resins using lignins as partial substitutes for phenol
(Bioresources, 2015-10-28)
Reducing the consumption of phenol during synthesis of phenolic resins is of great technological and scientific interest because of its economic and environmental implications. In this work, the use of hydroxymethylated ...
Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
(255th ACS National Meeting Exposition New Orleans, 2018-04)
Phenol-formaldehyde resins (PF) are thermosetting polymers used as adhesives for plywoods and other structural wood products including high pressure laminates (HPLs). HPLs are composite materials comprised of a paper-based ...
Synthesis and mechanical properties of laminates based on phenolic resins modified with sodium lignosulfonate.
(Latin American Applied Research, 2017-05-08)
The reduction of phenol and/or formalde-hyde consumption during phenolic resin synthesis is of great technological and scientific interest because of its economic and environmental implications.
In this work, the addition ...
Paneles de Madera Conglomerada Basados en Resinas Ureicas. Efecto de la densidad sobre las propiedades mecánicas.
(2017-03-30)
En este trabajo se estudió teórica y experimentalmente la relación entre la densidad y las propiedades mecánicas de paneles de madera conglomerada obtenidos a partir de un 88,5 % de partículas de madera y un 11,5% de resina ...