Dissolution-inhibiting Effects of Phosphoric Acid and Phosphoric Acidlcofactor on Papermaking Grade PCC Filler
Introduction Calcium carbonate filler is widely used in alkaline papermaking to lower the manufacturing cost, and to improve the critical properties of the papers. It is now generally accepted that, the use of calcium carbonate in wood-containing papers is not industrially feasible because of pulp darkening at alkaline pH and dissolution of calcium carbonate below pH 7. Traditionally, rosin sizes are widely used in acidic, pseudo-neutral and neutral papermaking to render the papers resistant to liquid penetration. The use of rosin sizes in alkaline papermaking, however, normally has many limitations due to the saponification reaction, making the use of calcium carbonate in rosin-sized papers also not industrially feasible. Titanium dioxide and calcined clay can be used as filler materials in the preparation of neutral to weakly acidic papers, and the optical properties can be strikingly improved. These materials, however, have the disadvantages of being very expensive, resulting in higher manufacturing costs. Talcum powder filler can also be effectively used in the preparation of neutral to weakly acidic papers, and its price is generally equivalent to calcium carbonate, but calcium carbonate is much superior to talcum powder in many respects. Therefore, the dissolution-inhibiting of calcium carbonate is quite necessary. In order to inhibit the dissolution of papermaking grade calcium carbonate filler, many methods have already been proposed. However, to apply papermaking grade calcium carbonate filler in weakly acidic, pseudo-neutral and neutral papermaking more cost-effectively, further research work is still needed. In this work, Phosphoric acid and phosphoric acid/cofactor were used in the dissolution-inhibiting modifications of papermaking grade precipitated calcium carbonate (PCC) filler to prepare the modified filler suspensions, and the dissolution-inhibiting effects of the relevant inhibitors were studied.
J.Shen Z.Q.Song X.R.Qian Y.Zhang K.C.Wang
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Fore Institute of Chemical Industry of Forest Products, CAF Key and Open Lab.on Forest Chemical Engineeri Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Fore
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
321-322
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）