title: Nanocrystalline cellulose extracted from pine wood and corncob.
abstract: The extraction of nanocrystalline cellulose from agro-residues is an interesting alternative to recover these materials. In the present study, nanocrystalline cellulose was extracted from pine wood and corncob. In addition, microcrystalline cellulose was used as a reference to compare results. Initially, the lignocellulosic residues were submitted to delignification pre-treatments. At the end of the process, the bleached fibre was submitted to acid hydrolysis. Additionally, microparticles were obtained from the spray-drying of the nanocrystalline cellulose suspensions. The nanocrystalline cellulose yield for the pine wood was 9.0-% of the value attained for the microcrystalline cellulose. For the corncob, the value was 23.5-%. Therefore, complementary studies are necessary to improve the yield. The spray-dried microparticles showed a crystallinity index of 67.8-% for the pine wood, 70.9-% for the corncob and 79.3-% for the microcrystalline cellulose. These microparticles have great potential for use in the production of polymer composites processed by extrusion.
authors.affiliation: State University of Ponta Grossa, Av. General Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: Fernanda I
authors.initials: FI
authors.lastname: Ditzel
authors.affiliation: State University of Ponta Grossa, Av. General Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Prestes
authors.affiliation: State University of Ponta Grossa, Av. General Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: Benjamim M
authors.initials: BM
authors.lastname: Carvalho
authors.affiliation: State University of Ponta Grossa, Av. General Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: Ivo M
authors.initials: IM
authors.lastname: Demiate
authors.affiliation: State University of Ponta Grossa, Av. General Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, PR, Brazil. Electronic address: lapinheiro@uepg.br.
authors.forename: Luís A
authors.initials: LA
authors.lastname: Pinheiro
mesh_terms: D002482:Cellulose / Q000302:isolation & purification*; D006868:Hydrolysis; D028223:Pinus / Q000737:chemistry; D014934:Wood / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry
chemical_list: D002482:Cellulose
keywords: Acetic acid (PubChem CID: 176); Corncob; Hydrochloric acid (PubChem CID: 313); Hydrogen peroxide (PubChem CID: 784); Microcrystalline cellulose (PubChem CID: 62698); Nanocrystalline cellulose; Phosphotungstic acid (PubChem CID: 162100); Pine wood; Sodium hydroxide (PubChem CID: 14798); Spray-dried microparticles; Sulphuric acid (PubChem CID: 1118)