关键词: 硅藻土;阳离子淀粉;改性;纸张

Abstract: Cationic starch and diatomite was the main raw material , diatomite particles were modified using cationic starch and sodium metaphosphate . The cationic starch modified diatomite filler was prepared.The experimental results indicate that it is effective to modified diatomite using cationic starch and sodium metaphosphate . The diatomite particle size , Zeta potential are increased , the starch deposition rate is above 98％.Under the condition of the same addition amount , compared with the join unmodified diatomite paper , the tensile index , tearing index , folding endurance and burst degrees of addition modified diatomite paper is improved .The retention of modified diatomite is more than 85％.

Key words: diatomite;cationic starch;modified;paper