Paper has been the most significant carrier of written information for many centuries. To prolong the life expectancy of papers, the polyurethane based on nanosilica was used to strengthen the paper fibers in this work. The relation between the mass concentration of polyurethane based on nanosilica and the specific properties of papers (e. g., folding endurance, tensile strength, tearing strength, whiteness and glossiness) were investigated. In addition, the effect of polyurethane based on nanosilica on the acid/alkali resistance and ageing resistance were studied. The results showed that polyurethane based on nanosilica could significantly improve the mechanical properties and ageing resistance of papers.

中文翻译：

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增强纸中基于纳米二氧化硅的透明聚氨酯

几个世纪以来，纸张一直是书面信息的最重要载体。为了延长纸的寿命，在这项工作中使用了基于纳米二氧化硅的聚氨酯来增强纸纤维。研究了基于纳米二氧化硅的聚氨酯的质量浓度与纸的特定性能（例如耐折性，抗张强度，撕裂强度，白度和光泽度）之间的关系。此外，研究了基于纳米二氧化硅的聚氨酯对耐酸碱性能和耐老化性的影响。结果表明，基于纳米二氧化硅的聚氨酯可以显着提高纸张的机械性能和耐老化性。