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| 基于硫酸钡原位沉积的沉淀碳酸钙表面包覆改性与应用研究 |
| Modification of Precipitated Calcium Carbonate Filler Particles via In-situ Surface Encapsulation with Barium Sulfate |
| 收稿日期： |
| DOI：10.11980/j.issn.0254-508X.2016.09.004 |
| 关键词: 沉淀碳酸钙 改性碳酸钙 硫酸钡改性 造纸填料 原位沉积 |
| Key Words:precipitated calcium carbonate calcium carbonate modification barium sulfate modification papermaking filler in-situ surface encapsulation |
| 基金项目:四川省教育厅科研项目(15ZB0217)；四川省大学生创新创业训练计划项目(201410622028)；四川理工学院科研项目(2011RC23)。 |
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| 摘要:采用原位沉积法分别在25℃和90℃将氯化钡和硫酸钠反应生成的硫酸钡对沉淀碳酸钙(PCC)进行包覆改性,对改性PCC的性质及应用进行了研究。结果表明,改性后的PCC表面包覆了硫酸钡,在pH值6.50的蒸馏水中溶解性降低；加填改性PCC的纸料打浆度升高；在90℃下改性、硫酸钡的沉积量为50%时,改性PCC在加填纸中的留着率最高；在25℃下改性、硫酸钡沉积量10%时，改性PCC可以使加填纸的抗张指数提高6.63%；加填改性PCC的纸张白度、不透明度和光散射系数都有所提高。 |
| Abstract:Precipitated calcium carbonate (PCC) was modified via in-situ surface encapsulation with barium sulfate produced by the reaction of sodium sulfate and barium chlorite at 25℃and 90℃. The dissolution behavior, retention and drainage property of PCC and barium sulfate-coated PCC, as well as the strength and optical properties of the filled handsheets were investigated. The experimental results showed that the surface of PCC was coated by barium sulfate. After the barium sulfate-coating modification, the dissolution of the filler in distilled water decreased. The beating degree of the stock filled with the modified PCC was higher them flled with PCC. The retention rate of modified PCC was the highest when it was modified at 90℃ and the charge of barium sulfate was 50%(on PCC).The tensile index of the handsheets filled with the modified PCC increased by 6.63%, the brightness, opacity and the light scattering coefficient of the handsheets were also improved. |
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