title: Particleboard manufacturing: an innovative way to recycle paper sludge.
abstract: This paper presents the results on a study to use paper mill sludge for particleboard production. Single-layer board and three-layer board, with paper sludge on the surface, were fabricated. Four levels of mixing ratios of paper sludge to wood particles (0:100, 15:85, 30:70, and 45:55) were used. The boards were produced with 3% and 4% methylene diphenyl diisocyanate (MDI), and 10% and 12% urea-formaldehyde (UF) adhesives. The bending and shear strengths, water absorption, and thickness swelling of the boards were investigated. The results indicated that the mechanical properties of the boards were negatively affected by the paper sludge amount. Overall, UF-bonded particleboards gave superior mechanical performance, water resistance, and thickness swell than MDI-bonded particleboards. The strengths of the UF-bonded board decreased much more than those of MDI-bonded board as paper sludge content increased. The three-layer boards made from 15% paper sludge with 12% UF satisfied fully the minimum requirements set by EN, ASTM D 1037-99, and ANSI A208.1 standards for general uses.
authors.affiliation: Wood Science and Technology Department, Natural Resources Faculty, Tehran University, P.O. Box 31585-4314, Karaj, Iran. taramian@nrf.ut.ac.ir
authors.forename: Asghar
authors.initials: A
authors.lastname: Taramian
authors.forename: Kazem
authors.initials: K
authors.lastname: Doosthoseini
authors.forename: Sayyed Ahmad
authors.initials: SA
authors.lastname: Mirshokraii
authors.forename: Mehdei
authors.initials: M
authors.lastname: Faezipour
mesh_terms: D000042:Absorption; D000269:Adhesives / Q000737:chemistry; D005557:Formaldehyde / Q000737:chemistry; D007220:Industrial Waste; D017953:Isocyanates / Q000737:chemistry; D010209:Paper; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D033081:Shear Strength; D014508:Urea / Q000737:chemistry; D014867:Water / Q000737:chemistry; D001559:Benzhydryl Compounds
chemical_list: D000269:Adhesives; D005557:Formaldehyde; D007220:Industrial Waste; D017953:Isocyanates; D012722:Sewage; D014508:Urea; D014867:Water; C005969:4,4'-diphenylmethane diisocyanate; D001559:Benzhydryl Compounds