Alkyl ketene dimer grafted cationic cellulose stabilizing nano magnesium oxide for efficient protection of acidic paper

摘要

Alkyl ketene dimer grafted cationic cellulose (AKD-g-CMCC) was designed to stabilize nano magnesium oxide (MgO) in low-polarity mixed solution of hexamethyldisiloxane (HMDSO) and isopropanol (IPA) for protection of acidic paper. The highly stable nano MgO organic dispersion exhibited a small average particle size (200 nm) and low viscosity (2.26 mPa.s), which is beneficial for the efficient protection of acidic paper. Evaluation results showed that properties of treated acidic paper were improved. Small-size MgO (200 nm) uniformly deposited on the paper endowed the treated acidic paper with mild pH and sufficient alkali reserve for deacidification. Meanwhile, the tensile index and tear index of treated acidic paper increased by 40.78% and 27.28%, respectively. Moreover, the treated acidic paper presented the low chromatic aberration (Delta E = 0.46) and the negligible influence in the appearance and clarity of writing. Additionally, the treated acidic paper also had the excellent anti-aging and anti-adhesion performance.

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