نتایج جستجو برای: cellulosic fibers
تعداد نتایج: 73082 فیلتر نتایج به سال:
Cellulose and lignin are abundant renewable biopolymers that can be used for the manufacture of new, environmentally friendly materials. The objective this study was to produce composites kraft lignin, which were reinforced with cellulosic thermomechanical pulp (TMP) fibers. Furthermore, fibers chemically modified resulting in cross-linking or increased hydrophobicity. Ideally, these modificati...
The morphological structure of the surface four Cedrus atlantica softwood samples was monitored by scanning electron microscope. obtained results have shown formation cracks on with deterioration majority cellulosic fibers. alteration wood and decomposition carbohydrates exploited microscopy images could act as a confidential sign an advanced stage decay biological attacks, leading upon time to...
Various methods of isolating cellulosic fibers from banana pseudo-stems including mechanical extraction, steam release, release combined with chemical treatment, and an enzymatic method pectinase Staphylococcus sciuri, were performed. The produced by all the characterized. In this work, we report on breaking tenacity, strength, fiber length, diameter, toughness, linear density enzyme-retted fib...
In this study, first,diffusible hydrogen of cellulosic electrode E8010-P1 and low hydrogen electrode E8018-G was measured by mercury displacement method according to ISO3690. Then,the effect of preheating and post-heating on the sensitivity to hydrogen inducedcold cracking in welding of 18mm API5L X70 steel with these electrodes was investigated according to ISO17642-2. The results of visual in...
Cellulose nanofibers (CNFs) with an average diameter 8 nm were isolated from corncobs using a stepwise method that included steam-explosion pretreatment, alkaline treatment, sodium hypochlorite bleaching, highspeed blending, and ultrasonic treatment. This mechanochemical method used only two chemical reagents in low concentrations to remove noncellulosic components. The removal of non-cellulosi...
All of the post-embryonic, above-ground structures of seed plants are generated from the shoot apical meristem (SAM), which acts as a reservoir of stem cells. Members of the flax genus (Linum spp.) have been used historically as models for the study of SAMs (Esau, 1942). Cultivated flax (Linum usitatissimum) is grown in more than 50 countries for its seeds or its stem phloem (bast) fibers (Rubi...
The novel and facile multi-stage method was used for the conversion of bamboo into nanocellulose single cell protein. Firstly, chips were treated with sodium hydroxide solution followed by hydrogen peroxide bleaching obtaining cellulose pulp a brightness 80% ISO. In second stage, obtained bleached cellulosic achieved dilute sulfuric acid filtration sugar solution, which than Candida utilis cult...
This study aims to investigate the relationship between mechanical fibrillation, morphological properties, and rheological behavior of cellulosic fiber. Three types fibers were obtained by adjusting namely squashed cellulose, incompletely nanofibrillated completely respectively. The cellulose with large size small aspect ratio had low entanglement capacity, thus forming a weak fiber network. co...
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