CPAM/膨润土体系对麦草浆的微粒助留作用  

Retention and Drainage Effect of CPAM/Bentonite on Wheat Straw Pulp

作　　者：董元锋[1] 刘温霞[1] 

机构地区：[1]山东轻工业学院制浆造纸工程省级重点学科,山东济南250100

出　　处：《造纸化学品》2007年第1期6-10,共5页Paper Chemicals

基　　金：国家自然基金(20476053);济南市科技明星计划(60125)

摘　　要：用氟化钠做改性剂,对自然界中的钙基膨润土进行中性改性制备膨润土浆液,组成CPAM/膨润土微粒助留体系,并与传统的碳酸钠改性膨润土的助留助滤效果进行了比较。透射电镜观察、粒度、黏度和动态滤水等实验表明,氟化钠改性膨润土呈完全剥离的片状结构,同时具有更好的胶体与分散性能,粒度小、悬浮液流动性好,且对麦草浆具有更好的助留助滤效果,对抄造体系的pH适应性强,尤其是放置4周后仍能保持其良好的助留助滤效果。Ca-bentonite was ion-exchanged with sodium fluoride to obtain sodium bentonite slurry under the neutral condition. The sodium fluoride modified bentonite was used as the microparticle component of CPAM/bentonite system. Its performance was compared with that of conventional sodium carbonate-modified bentonite. The morphology and suspension properties of the bentonite were observed and evaluated by TEM and conventional analysis methods, respectively. It was found that the sodium fluoride-modified bentonite was dispersed as single layered structure and exhibited better suspensibility, smaller particle size as well as lower sludge viscosity. Naturally, the bentonite modified by sodium fluoride made a greater improvement on the retention and drainage of the wheat straw pulp, showed a better adaptability on pH value of system than the bentonite modified by sodium carbonate. It can sustain its good performance even after four weeks as a suspension.

关 键 词：膨润土悬浮液 氟化钠 中性改性 麦草浆 微粒助留 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]