论文部分内容阅读
设计正交试验制备出纳米氧化镁(MgO)悬浮液,探讨了分散剂用量、超声时间和超声功率对悬浮液分散稳定性影响。将制备出的纳米MgO悬浮液用于纸质文物脱酸保护,探讨MgO用量对纸质文物的影响。结果表明:分散剂质量分数1.1%,超声时间20min,超声功率560W可以制备稳定的纳米MgO悬浮液;0.7%质量分数纳米MgO脱酸液脱酸处理后,纸张pH值从3.69明显上升至8.45,纸张抗张强度有所上升,碱残留达到0.610mol/kg,热老化过后,pH仍能保持在8.29,抗张强度维持较高水平,碱残留保持0.595mol/kg,从而起到长效保护的作用。
Orthogonal experiments were designed to prepare nanometer magnesia (MgO) suspension. The effects of dispersant dosage, ultrasonic time and ultrasonic power on the dispersion stability of the suspension were discussed. The prepared nano-MgO suspension for deacidification of paper artifacts to explore the impact of MgO dosage on paper artifacts. The results showed that the stable nano-MgO suspension can be prepared with the mass fraction of dispersant 1.1%, ultrasonic time 20min and ultrasonic power 560W. The pH value of the paper increased from 3.69 to 8.45 after 0.7% Tensile strength of the paper increased, the alkali residue reached 0.610mol / kg, heat aging, the pH remained at 8.29, the tensile strength to maintain a high level of residual alkali to maintain 0.595mol / kg, which play a long-term protection effect.