Improvement of paper properties of recycled unbleached softwood kraft pulps by poly(allylamine hydrochloride)
نویسندگان
چکیده
منابع مشابه
Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(allylamine Hydrochloride)
Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength. In this work, the charge density of PAH was determined at different pH and ionic strengths; PAH adsorption onto the cellulosic fibers was characterized, and the effects of low PAH dosage on the papermaking properties were evaluat...
متن کاملDual-polyelectrolyte Adsorption of Poly(allylamine Hydrochloride) and Xylan onto Recycled Unbleached Kraft Pulps
The effects of a double polyelectrolyte adsorption of poly(allylamine hydrochloride) (PAH) and xylan (Xyl) on a recycled unbleached softwood kraft pulp were studied. The kinetics of PAH adsorption on this pulp was analyzed by building adsorption isotherms and by estimating the surface nitrogen adsorbed through the X-ray photoelectron spectroscopy (XPS) technique. It was found that at pH 7.5, 0....
متن کاملcontrol of the optical properties of nanoparticles by laser fields
در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...
15 صفحه اولDesorption of Metal Ions from Kraft Pulps. Part 1. Chelation of Hardwood and Softwood Kraft Pulp with Edta
Chelation of unbleached and oxygen bleached hardwood and softwood kraft pulps with EDTA was studied. The main focus was on the desorption of magnesium, manganese, and iron due to their impact in TCF-bleaching. Desorption of other metal ions present were also studied in order to get an over-all estimation of the metal ion concentrations and their desorption during chelation. By using the concept...
متن کاملThermal stability of high - density paper made of refined softwood kraft pulp
Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Emilia Vänskä Name of the doctoral dissertation Thermal stability of high-density paper made of refined softwood kraft pulp Publisher School of Chemical Technology Unit Department of Forest Products Technology Series Aalto University publication series DOCTORAL DISSERTATIONS 152/2016 Field of research Forest Products Chemistry...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BioResources
سال: 2011
ISSN: 1930-2126,1930-2126
DOI: 10.15376/biores.6.1.570-583