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Keywords = Acetylation
Number of Articles: 10
Qualitative Structural Characterization of Two Lignin Samples and Quantitative Determination of Hydroxyl and Methoxyl Functional Groups in Kraft Lignin via Acetylation
Volume 32, Issue 3 , September 2017, , Pages 369-381
Abstract
In this research, two types of lignin, i.e. one extracted from industrial waste water of the Iran wood and paper (choka) factory as black liquor and another provided from Aldrich company, were studied. Firstly, the lignin was precipitated from its black liquor by a dilute acid and was then purified by ... Read MoreStudying the effect of acetylation Beech on interfacial bonding resistance of transparent paint (nitrocellulose lacquer, asid catalyzed lacquer and Half Ppolyester)
Volume 31, SPRING 1 , March 2016, , Pages 105-117
Abstract
In this study, structural performance of corner joint reinforced by fiber reinforced polymers (FRP) at the area of maximum tension stress was investigated under diagonal tension loading. Therefore 1 to 3 layers of unidirectional woven Glass, Carbon and Kevlar fibers were used ... Read MoreThe influence of fiber chemical treatment on prevention of biologic deterioration of medium density fiberboard (MDF)
Volume 29, Fall 3 , November 2014, , Pages 390-398
Abstract
Abstract In this research, the effects of acetylation on the prevention of white-rot and brown-rot fungi deterioration in medium density fiberboard (MDF) were investigated. Sample boards were made from acetylated poplar fibers, which were treated at different times (0, 30, 90 and 270 minutes) to obtain ... Read MoreInvestigation on the effect of acetylation and reduction treatments on the chromophore groups of isolated lignin from unbleached hardwoods chemimecanical pulp using FT-IR spectroscopy
Volume 29, SPRING 1 , May 2014, , Pages 79-93
Abstract
This study lignin from unbleached hardwoods chemimechanical pulp was extracted and the chromophor functional groups of the lignin were studied. Acetylation and reduction treatments were perfomed and samples were analyzed by FT-IR spectroscopy. A mild acidic dioxin extraction method was employed to isolate ... Read MoreInvestigation on effect of acetylation and antioxidant on weathering resistance of wood/HDPE composite
Volume 27, WINTER 4 , December 2012, , Pages 707-716
Abstract
To investigate the effect of acetylation and antioxidant separately and together on discoloration and contact angle wood plastic composite due to weathering , composite s were made using popular wood flour and high density polyethylene . the sample were exposed to natural weathering for 6 ... Read MoreInvestigation on the effect of acetylation and the resin type on the biological resistance of aspen tree layered particleboard
Volume 26, Issue 3 , September 2011, , Pages 466-476
Abstract
This research was conducted to evaluate the effects of acetylation and the resin type on three layered populus particleboard against white-rot fungus, Trametes versicolor. Populus particles were acetylated at three levels of acetyl content (WPG of 0, 8.39% and 17.27%). In manufacturing of single and ... Read MoreInvestigation effect of Weathering on Acetylated Beech Wood by FTIR Spectroscopy and Electron Microscopic
Volume 25, Issue 1 , September 2010, , Pages 48-61
Abstract
In this study acetylated Beech wood (Fagus orientalis Lipsky) has been subjected to a variety of artificial weathering conditions in different of times (0,150&300 h), then wood surface was analyzed for chemical changes using Fourier Transform Infrared (FTIR) spectroscopy and for structural changes ... Read MoreThe Investigation of Acetylation and Anti-Oxidant Effect on Weathering of wood Plastic Composites By Means of FTIR and Color Metry (Color measurement)
Volume 25, Issue 1 , September 2010, , Pages 70-79
Abstract
In this study capability of acetylated poplar flour in manufacture of high density poly ethylene composite which expose to accelerated weathering, was investigated. The acetylation degrees at medium and zero (control) levels, use of anti- oxidant and duration of weathering were considered as variables ... Read MoreInfluences of Acetylation on Water Absorption and Dimensional Stability of Manufactured Paper
Volume 22, Issue 2 , September 2008, , Pages 99-108
Abstract
This research was carried out to study the influence of acetylation on paper dimensional stability. Specimens from printing paper and Texon paperboard were oven dried and then treated with acetic anhydride at 120°c for 30 and 60 min without catalyst. Acetylated papers were soaked in water for 2 and ... Read MoreEffect of Acetylation on Physical and Mechanical Properties of Prticleboard
Volume 22, Issue 1 , October 2007, , Pages 18-28