改性轻质碳酸钙的性能及其在造纸中的应用

摘要

采用自制的树枝状聚合物对轻质碳酸钙(PCC)进行改性,并用改性PCC作为填料对纸张进行加填.实验结果表明,改性后PCC的聚集现象大大减弱,悬浮液表观黏度下降50％以上,分散性明显改善；将改性PCC作为造纸填料时,填料留着率明显提高,与改性前PCC加填相比,填料留着率由64.6％提高至73.1％.%The aggregation phenomenon of the precipitated calcium carbonate (PCC) was reduced significantly and the apparent viscosity of its suspension dropped by more than 50％ after it was modified.When the modified PCC was used as filler in papermaking,the filler retention was improved from 64.6％ to 73.1％.