季铵型瓜尔胶的制备及在纸质文献加固中的应用

纸质文献是人类文明的瑰宝,大量的脆弱纸质文献亟待加固保护,因此急需探究一种与纸张纤维相容性好、操作简便、加固效果显著的材料。本研究对天然高分子瓜尔胶进行季铵化改性,制得取代度为0.137的季铵型瓜尔胶,改性产物具有更好的溶解性及稳定性,并将其应用于纸质文献加固。结果表明,相比未处理厚纸,加固处理后纸张的抗张强度从2.64 kN/m提升至3.16 kN/m、耐折度从7次提升至13次、撕裂度从161.5 mN提升至193.5 mN、零距抗张强度从65.0 kN/m提升至72.8 kN/m,分别提升了19.7%、85.7%、19.8%、12.0%。老化后色差变化为1.31,且不会对纸张及字迹颜色产生负面影响,证明季铵型瓜尔胶在纸质文献的加固中具有一定的应用前景。     

Aging Resistance Evaluation of Aged Paper Reinforced with Different Nanocelluloses

Paper documents experience severe acidification and embrittlement. Nanocellulose is an excellent reinforcement material for paper documents owing to its compatibility and excellent mechanical strength. However, little research has been conducted on the aging resistance of nanocellulose-reinforced paper. In this study, six types of nanocelluloses were used to reinforce aged paper. The reinforcement and anti-aging performances were evaluated, and the anti-aging mechanism was further clarified. Nan...