原位沉积法细胞内合成硅酸钙的加填效果与机理

Fiber Loading of Calcium Silicate by In-situ Deposition in the Cell Lumen of Filler

关键词:  硅酸钙  胞腔填充  原位沉积  粉煤灰脱硅液

Key Words:calcium silicate  faber loading  deposition  liquor of desilication

摘要:采用原位沉积法,以粉煤灰脱硅液和石灰乳为原料,在纤维悬浮液中合成硅酸钙,使硅酸钙沉积到纤维细胞内和纤维分丝帚化处,达到填充纤维的目的。在加填量30%的条件下,探讨了纤维配比、温度、搅拌转速、浆浓4个单因素变量对硅酸钙在细胞中的填充效果以及对纸张性能的影响。结果表明,在针叶木浆与阔叶木浆配比为1∶1,温度为60℃、转速为500 r/min、浆浓为5%的条件下,采用合成的硅酸钙抄造的纸张灰分含量达到30.09%,胞腔填充量达到20.14%,既提高了填料的留着,又保证了纸张强度。

Abstract:The liquor of desilication and lime cream were applied to synthesize calcium silicate by in-situ deposition. The calcium silicate was deposited in the cell lumen of filler and on the fibrills in order to achieve the purpose of fiber loading. When the filler loading was 30%, four factors, i.e the ratio of softwood fiber to hardwood fiber in the pulp, temperature, agitating speed and the pulp consistency on fiber loading process and paper properties were studied. The results showed that when the ratio of softwood and hardwood pulp was 1∶1, the temperature was 60℃, the agitating speed was 500 r/min and the pulp consistency was 5%, the ash content of the paper reached 30.09%, and the content of fiber loading reached 20.14%, at the same time, the retention of filler was improved without deteriorating the paper strength.