Spreading of AKD and ASA on Wet Paper during the Curing Phase of Paper Sizing
Internal sizing is the process through which paper is provided with a controlled level of hydrophobicity to control wetting and penetration of aqueous fluids.The most common hydrophobic(or sizing)agents used for internal sizing are alkyl ketene dimer(AKD)and alkenyl succinic acid anhydride(ASA).It has been proposed that AKD and ASA molecules spread on a water film covering the fibre surface via film expansion,which was believed to be very fast.We report in this study on the development of a new method to quantify the spreading velocity of sizing agents on a water surface covering cellulose fibres in wet paper samples.The emphasis of this new method is on differentiating the surface spreading,where the driving force is the film pressure,from the chromatographic effect,where the driving force comes from a mobile phase.This study found that the spreading of sizing agents in this situation cannot be described as film expansion.Our results suggest that sizing agent films on a water surface are uneven and that there are also strong molecular interactions between the sizing agent molecules and the substrate covered by the water.
Spreading on thin water film paper sizing AKD ASA
MYRIAM HUDRY-CLERGEON SIMON CHAMP WEI SHEN
Department of Chemical Engineering,Monash University,Clayton Campus,Vic.3800,Australia BASF,Aktiengeselischaft,Global Product Development Sizing Chemicals,ED/DP-H 201,67056 Ludwigshafen,G
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
743-746
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）