Deacidification of Papers by Using Oleic Acidmodified Mg(OH)2 Nanoparticles [油酸改性纳米Mg(OH)2用于纸张脱酸]

作者：Wang R.; Li B.^*; Fan H.

来源：China Pulp and Paper, 2019, 38(9): 32-37.

DOI：10.11980/j.issn.0254-508X.2019.09.006

• Nanoparticles of Mg(OH)2
• Oleic acid-modified
• Paper deacidification

The nanoparticles of Mg(OH)2 modified by oleic acid were uniformly dispersed in hexamethyldisiloxane to form a stable deacidification liquid, which was sprayed on the aged paper to realize deacidification of the paper. It was observed that the modified Mg(OH)2 was prepared when 0.1 g of oleic acid treated with 1g of nanometer Mg(OH)2 at 50°C for 1 h, the modified Mg(OH)2 could well dispered and could be used for deacidification of paper. 1 g of oleic acid-modified Mg(OH)2 nanoparticles dispersed in 1L of hexamethyldisiloxane was used as deacidification liquid. When the deacidification liquid spraying amount was 2.7 g/m2, the pH value of the paper surface significantly improved (from 4.00 to about 7.92). The heat aging test indicated that the papers after deacidfication showed a good stability of pH value (about 7.60) the tensile index and tear index declined slightly but far later than that of undeacidified ones and the chromatic aberration was 0.64. The appearances of the paper before and after deacidification had little difference.

• 单位
  华南理工大学; 制浆造纸工程国家重点实验室