Stability of lignocellulosic papers strengthened and deacidified with aminoalkylalkoxysilanes

编号 020028604

推送时间 20210412

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Stability of lignocellulosic papers strengthened and deacidified with aminoalkylalkoxysilanes

来源期刊 Polymer Degradation and Stability

期 第286期

发表时间 20201028

关键词 trengthening;  Lignin;  Newsprint paper;  Alum-rosin;  Mechanical properties;  Acidity; 

摘要 The durability of paper documents treated with aminoalkylalkoxysilane copolymer (co-AAAS) flexible networks, as deacidifying and strengthenening agents, was studied. To this end, a 1922 lignocellulosic newsprint paper was treated with co-AAASs and characterized. Physico-chemical properties such as pH, chromatism, opacity and mechanical strength were measured shortly upon treatment and several years after. In order to better understand the role of the initial degradation state of the paper and the impact of its constituents other than cellulose (lignin, alum-rosin sizing) on the treatment efficiency, several laboratory papers were added as models. It was shown that alum-rosin sizing contributed to a decrease in pH of the most degraded treated paper over the monitoring time, whereas the strengthening effect was mostly affected by the presence of lignin. In particular, for most papers, after several years, the gain in folding endurance was the lowest in the lignin-rich ones. The breaking length of all the papers increased post-treatment and over time, independently of the paper constituents. This was attributed to the slowly progressing aminoalkylalkoxysilanes polycondensation, on the scale of years, as evidenced by Cross Polarisation - Mass Angle Spinning( 29)Si solid-state Nuclear Magnetic Resonance.

服务人员 尚玮姣

服务院士 宋湛谦

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