科研之友
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摘要
Wikstroemia paper was a high-quality handmade paper with excellent tenacity and durability. In order to better evaluate and improve its durability，pulping and paper making were carried out at atmospheric pressure and 100 ℃ with wikstroemia plants as raw material，K2CO3 and NaOH as cooking agents，respectively. The dry heat accelerated aging experiments were conducted to study the effect on the durability of paper with different cooking conditions. The durability of paper was evaluated by analyses of whiteness，strength and chemical properties. The results showed that the durability of paper greatly depended on cooking condition，and using a mild alkaline as cooking agent could obviously increase the aging resistant property. The best durability of wikstroemia paper could be obtained by cooking condition of K2CO3 with concentration of 12% for 6 h at atmospheric pressure. The tensile strength，folding endurance，tearing strength and retention rate of polymerization degree after aging for 80 days were 94. 2%，19. 6%，47. 9% and 66. 9%，respectively. With the cooking level increasing，the yellowing of the paper would be accelerated. Meanwhile，the fiber length，polymerization degree and mechanical properties of paper declined more significantly. And the acidification of paper would intensify. The results also indicated that with the extension of aging time，the crystallinity of cellulose in paper would decrease，while the content of carboxyl would increase，and the surface of the fiber exhibited wrinkling and embrittlement. ? 2022 China Technical Association of Paper Industry.
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单位华南理工大学; 制浆造纸工程国家重点实验室
