WATER-SOLUBLE POLYMERS AS RETENTION AIDS IN A MODEL PAPERMAKING SYSTEM .1. POLYACRYLAMIDES

被引：28

作者：

HOWARD, GJ ^{[1
]}

HUDSON, FL ^{[1
]}

WEST, J ^{[1
]}

机构：

[1] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT POLYMER & FIBRE SCI,MANCHESTER M60 1QD,ENGLAND

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 1977年 / 21卷 / 01期

关键词：

POLYACRYLAMIDES;

D O I：

10.1002/app.1977.070210101

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A series of polyacrylamides covering a wide molecular weight range were synthesized and employed as retention aids in a model papermaking system of cellulose fibers and titanium dioxide. The ability of the polymer to increase the proportion of added titanium dioxide that is retained in the formed paper sheet is strongly dependent on molecular weight, but not on pH. Adsorption isotherms on both pigment and fibers are strongly molecular weight dependent. Polyacrylamides have no more than a weak flocculating effect on fiber suspensions and stabilize dispersions of titanium dioxide. However, with mixed dispersions of fibers and pigment, in the same ratio (10:1) as in paper formation, strong coflocculation is evidenced by the higher molecular weight polyacrylamides. In this model system pigment retention is a consequence of a heteroflocculation by adsorbed polymer bridging between the particles of titanium dioxide and cellulose fibers, possibly augmented by improved filtration in the forming sheet.

引用

页码：1 / 16

页数：16