Influence of Hemicelluloses Pre-extraction and Re-adsorption on Pulp Physical Strength Ii. Beatability and Strength Study
نویسندگان
چکیده
Xylan extracts from southern US hardwood were used for the adsorption of both hardwood and softwood pulp. Pulp beatability and physical strength properties were determined and compared with those of the conventional Kraft pulp and pre-extracted modified Kraft pulp. The results indicated that hemicelluloses adsorption greatly improved pulp beatability. Compared to conventional Kraft pulp, a significant increase in pulp physical strength could be achieved by adsorbing hemicelluloses onto pulp. An increase of up to 20-25% in tensile strength was observed for both hardwood and softwood pulps, as well as an 8-10% increase in tear strength, achieved for comparing pulp tear strength at a certain tensile level. In addition, softwood adsorbed pulp showed a slightly higher bulk property at the same strength level.
منابع مشابه
Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps
Extraction of hemicelluloses prior to pulping and conversion of the extracted hemicelluloses to other bioproducts could provide additional revenue to traditional pulp and paper industries. The effect of hemicelluloses pre-extraction with a hydrothermal (HT) process on Pinus radiata chemimechanical pulp (CMP) properties was investigated in this study. The HT extraction resulted in a release of 7...
متن کاملAdsorption of Hemicellulose Extracts from Hardwood onto Cellulosic Fibers. I. Effects of Adsorption and Optimization Factors
The adsorption of dissolved hemicelluloses derived from US southern mix hardwood to cellulosic fiber is an efficient way for hemicellulose utilization. Retaining more hemicelluloses on the cellulose fibers leads to a higher pulp yield, better beatability and improved pulp strengths. The primary aim of the current work was to investigate the hemicellulose adsorption process through treating Kraf...
متن کاملImpact of Hemicelluloses Pre-extraction on Pulp Properties of Sugarcane Bagasse
The extraction of hemicelluloses, which otherwise would be wasted in the black liquor, can be integrated with chemical pulping processes in a biorefinery approach that will generate a sugar-rich feedstock for production of fuels and chemicals. Extractions of hemicelluloses from sugarcane bagasse under dilute sulphuric acid or mild alkaline conditions were performed, using a central composite ex...
متن کاملStudy of the Luffa Cylindrica, Part II: Pulp Elaboration and Paper Characterization
This study was devoted to the development of pulp Luffa Cclindrica and its characterization paper (annual plant fiber of the family Cucurbitaceae). Baking at soda helps to achieve a high level of delignification (Kappa ≤ 10) and high yield (≈ 67%).The beatability stack Valley is comparable to refined wood fibers, the fibers develop a normally time with good hydrophilic pro...
متن کاملEffect of pH, Initial Concentration, Background Electrolyte, and Ionic Strength on Cadmium Adsorption by TiO2 and γ-Al2O3 Nanoparticles
The entrance of Cd (II) to aqueous environments causes a major problem to human health. The current article examines the efficiency of TiO2 and γ-Al2O3 nanoparticles in Cd (II) removal from aqueous medium as influenced by different chemical factors, such as pH, initial concentration, background electrolyte, and ionic strength, in accordance with standard experimental methods. It conducts Batch ...
متن کامل