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Bamboo cellulosic pulp produced by the ethanol/water process for reinforcement applications/Polpa celulosica de bambu produzida pelo processo etanol/agua para aplicacoes de reforco

Ciência florestal, 2015-01, p.127 [Peer Reviewed Journal]

COPYRIGHT 2015 Universidade Federal de Santa Maria ;ISSN: 1980-5098 ;EISSN: 1980-5098

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  • Title:
    Bamboo cellulosic pulp produced by the ethanol/water process for reinforcement applications/Polpa celulosica de bambu produzida pelo processo etanol/agua para aplicacoes de reforco
  • Author: Correia, Viviane da Costa ; Curvelo, Antonio Aprigio da Silva ; Marabezi, Karen ; de Souza Almeida, Alessandra Etuko Feuzicana ; Savastano, Jr., Holmer
  • Is Part Of: Ciência florestal, 2015-01, p.127
  • Description: Organosolv pulping is the clean chemical process of using organic solvents to aid in the removal of lignin and hemicellulose from lignocellulosic raw materials. This method provides facility for solvent recovery at the end of the process. In this work, it was to produce bamboo cellulosic pulp by the organosolv process evaluating different temperatures and reaction times, and the pulps were analyzed aiming their future application in the reinforcement of composites. The production of bamboo pulp by the organosolv process was studied varying the cooking conditions at 1, 2 and 3 h and 150, 170 and 190°C of temperature, in order to achieve the ideal conditions of yield, chemical and morphological characteristics of the pulp for its potential application in the reinforcement of composites. The best results for delignification (kappa number of 38), with relatively lower fiber degradation (viscosity of 625 [cm.sup.3] [g.sup.-1]), aspect ratio of 40.4 and the index zero-span of 204 Nm [g.sup.-1], were achieved for the pulping process at 190°C for 2 h. These pulping conditions can be considered as the more appropriate in the range of time intervals evaluated in this work. The higher mechanical strength and the lower incidence of morphological defects in the fiber (6.0% of curls and 10.6% of kinks) can demonstrate the potential of organosolv bamboo pulp as a reinforcing element. Keywords: cellulose; bamboo; organosolv pulping; ethanol. A polpacao organossolve e o processo quimico limpo que utiliza solventes organicos para remocao de lignina e hemicelulose de materias-primas lignocelulosicas. Esse metodo proporciona a facilidade de recuperacao do solvente no final do processo. Neste trabalho foi produzida polpa celulosica de bambu pelo processo organossolve, avaliando diferentes temperaturas e tempos de reacao, e as polpas foram analisadas visando a futura aplicacao para reforco de compositos. A producao de polpa de bambu pelo processo organossolve foi estudado variando as condicoes de cozimento de 1, 2 e 3 h a 150, 170 e 190°C, a fim de alcancar as condicoes ideais de rendimento e caracteristicas quimicas e fisicas da polpa para a potencial aplicacao em reforco de compositos. Os melhores resultados para a deslignificacao (numero de kappa 38), com a degradacao da fibra relativamente baixa (viscosidade de 625 [cm.sup.3] [g.sup.-1]), razao de aspecto de 40,4 e o indice zero span de 204 Nm [g.sup.-1], foram obtidos pelo processo de polpacao a 190°C durante 2h. Essa condicao de polpacao pode ser considerada como a mais adequada em relacao aos demais intervalos de tempo estudados no presente trabalho. A maior resistencia mecanica e menor incidencia de defeitos morfologicos na fibra (6,0% de curls e de 10,6% de kinks) podem demonstrar o potencial da polpa organossolve bambu como elemento de reforco. Palavras-chave: celulose; bambu; polpacao organossolve; etanol.
  • Publisher: Universidade Federal de Santa Maria
  • Language: Spanish
  • Identifier: ISSN: 1980-5098
    EISSN: 1980-5098
  • Source: Bioline International
    DOAJ Directory of Open Access Journals
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