Data/hora: 24/06/2024 00:54:47

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	13/11/2019	
Data da última atualização: 	28/05/2020	
Autoria: 	LOUREÇON, T. V.; SANTILLI, B. V.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I.	
Afiliação: 	Tainise V. Lourençon, Aalto University; Beatriz V. Santilli, Universidade Federal do A,azonhas; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela I. Bolzon de Muniz, UFPR.	
Título: 	Thermal stabilization of wood/polypropylene composites through addition of unmodified, low-cost Kraft lignin.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Waste and Biomass Valorization, v. 11, n. 4, p. 1555-1563, Apr. 2020.	
DOI: 	10.1007/s12649-018-0484-6	
Idioma: 	Inglês	
Conteúdo: 	Wood/polymer composites are elegant strategies to produce materials with good performance and reduced cost. However, the addition of a lignocellulosic fiber is often responsible for the decreased thermal stability, decreasing their appeal as building materials. Here, we aimed to improve the thermal stability of wood/polypropylene composites through addition of unmodified, low-cost, abundant, ready-to-use kraft lignin. Besides thermal behavior, the composites were analyzed concerning to water relationships, colorimetric parameters, mechanical properties, and morphological features. The wood/propylene composites with and without lignin showed a very similar morphology with good interaction between matrix and biomasses. Thickness swelling decreased as function of lignin increment. The composites with 4, 12 and 20 wt% of lignin content had temperatures at 10% mass loss shifted toward higher temperatures (332, 350 and 362 °C, respectively) compared to wood/ polypropylene (326 °C). Flexural strength of wood/propylene composite was preserved (42 MPa) at 4 wt% of lignin addition and tensile strength was kept unaltered in all ratios of lignin/wood (14?19 MPa).	
Palavras-Chave: 	Bio-based polymer; Compósito; Kraft lignin; Lignocellulosic; Polímero de base biológica; Propriedade térmica; Water absorption.	
Thesagro: 	Absorção de Água; Lignina.	
Thesaurus Nal: 	Thermal properties.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (57073-1) - UPC - AP - DD -  -  -  - DIS