Study on the Stability of Potentially Sticky Substances in Process Water of Newsprint Mills
Potentially sticky substances in process water of a newsprint mill were characterized using GC-MS technique.Results showed that the major lipophilic substances included dehydroabietic acid,linoleic acid,oleic acid and palmitic acid.The effect of neutral and acidic polysaccharides on the stability behavior of typical wood resin models (resin acid,R,fatty acid,O)was also investigated.Results showed that the colloidal resins could be stabilized by the electrostatic mechanism if no calcium ions were added.Once calcium ions were added,the colloidal resins will aggregate rapidly.When the concentration ratio of calcium ions to R and O reached 0.6 and 1.6,respectively,the resins would completely aggregate.However,no calcium-induced aggregation occurred,if the concentration ratio of added neutral polysaccharides to R and O exceeded 0.2 and 1.0,respectively.The acidic polysaccharides could further worsen the stability of the colloidal resins.When both the neutral and acidic polysaccharides were present,the sterically stabilized resin acid(R)and fatty acid(O)would maintain a certain level of stability,indicating the limited adverse effect of acidic polysaccharides.
wood resin stability polysaccharides aggregation
ZHANG CHUNHUI ZHAN HUAIYU FU SHIYU LI BINGYUN
State Key Lab.of Pulp and Paper Engineering,South China University of Technology,Guangzhou,510640,P.R.China
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
535-538
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）