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Abstract：
Invaluable paper relics that embody a rich traditional culture have suffered damage, requiring urgent restoration. In this context, the utilization of soymilk as a sizing agent holds great significance and reverence. This study investigates the use of soymilk as a sizing agent for Xuan paper and evaluates its effects on various properties and the long-term behavior of the paper. The findings reveal that the application of soymilk as a sizing agent for Xuan paper imparts distinct properties, including hydrophobicity, improved mechanical properties, and unique chromaticity. These characteristics-arising from the papillae on the surface of the Xuan paper, the protein folding of the soy protein, and hydrogen-bonding interactions between the soy protein and paper fibers-play a crucial role in shaping the paper\'s unique attributes. From a physicochemical perspective, the aging process leads to multiple changes in paper properties. These changes include acidification, which refers to a decrease in pH, as well as a decline in mechanical strength, an increase in chromaticity, and a decrease in the degree of polymerization (DP) of the paper. The Ekenstam equation is employed to predict the lifespan of the paper, showing longer lifespans for Sheng Xuan paper and a negative correlation between soymilk concentration and lifespan in soymilk-sized paper. Our work provides valuable insights for the preservation and maintenance of paper, highlighting the potential benefits and challenges of using soymilk for surface sizing.
摘要：
体现丰富传统文化的珍贵纸质文物遭到破坏，需要紧急修复。在这种情况下，豆浆作为上浆剂的利用具有重要意义和崇敬性。这项研究调查了豆浆作为宣纸的施胶剂的使用，并评估了其对各种性能和纸张长期行为的影响。研究结果表明，豆浆作为宣纸的施胶剂具有独特的性能，包括疏水性，改进的机械性能，和独特的色度。这些特征——源于宣纸表面的乳头，大豆蛋白的蛋白质折叠，大豆蛋白和纸纤维之间的氢键相互作用在塑造纸的独特属性中起着至关重要的作用。从物理化学的角度来看，老化过程导致纸张性能的多次变化。这些变化包括酸化，这是指pH值的降低，以及机械强度的下降，色度的增加，和纸张的聚合度（DP）降低。Ekenstam方程用于预测纸张的寿命，盛宣纸的寿命更长，豆浆浓度与豆浆尺寸纸的寿命呈负相关。我们的工作为纸张的保存和维护提供了宝贵的见解，强调使用豆浆进行表面施胶的潜在好处和挑战。
