Potassium methyl siliconate （PMS） was investigated as a simple physicochemical modification in aged paper using silane coupling technique. The PMS-based solution was shown to favor penetration in the cellulose fiber...Potassium methyl siliconate （PMS） was investigated as a simple physicochemical modification in aged paper using silane coupling technique. The PMS-based solution was shown to favor penetration in the cellulose fibers on the paper with suitable uptakes being achieved at low concentrations. The studies of the physicochemical properties of the treated paper （mechanical strength and alkalinity） demonstrated that, besides the required deacidification feature and high level of alkali reserves, the immersion treatment by PMS allowed the enhancement of the mechanical intensities of paper arising from the interaction between Si--OH generated in hydrolysis of PMS and C--OH of cellulose on the paper. Adding ethanol into PMS solution could significantly improve mechanical properties of the aged paper treated by the formula apart from modifying the flatness of the paper. Optimized treatment process was achieved by altering the ratio of ethanol to water in PMS-based solutions. Contact angle measurements indicated the occurrence of hydrophobic character of the papers in immersion treatment with PMS-based solutions. The easy availability of the materials and simplicity of the method rendered it convenient for treatment for aged paper documents.展开更多
采用不同用量的硅烷偶联剂(KH-550)对纳米Al_2O_3表面进行改性研究,采用红外光谱和粒度仪对改性前后纳米Al_2O_3进行表征;并考察了改性纳米Al_2O_3的用量对芳纶纸抗张强度、介电强度和紧度等性能的影响。结果表明,KH-550能够成功地对纳...采用不同用量的硅烷偶联剂(KH-550)对纳米Al_2O_3表面进行改性研究,采用红外光谱和粒度仪对改性前后纳米Al_2O_3进行表征;并考察了改性纳米Al_2O_3的用量对芳纶纸抗张强度、介电强度和紧度等性能的影响。结果表明,KH-550能够成功地对纳米Al_2O_3进行改性,并且有助于芳纶纸性能的增强。随着KH-550用量的增加,改性后的纳米Al_2O_3粒径有所减小;纳米Al_2O_3与KH-550最佳配比为5 g∶15 m L,改性纳米Al_2O_3用量为6%时,芳纶纸的抗张指数和介电强度分别提高了58.3%和37.0%,但纸张的紧度变化不明显。展开更多
基金financially supported by the National Natural Science Foundation of China(No.20876169)
文摘Potassium methyl siliconate （PMS） was investigated as a simple physicochemical modification in aged paper using silane coupling technique. The PMS-based solution was shown to favor penetration in the cellulose fibers on the paper with suitable uptakes being achieved at low concentrations. The studies of the physicochemical properties of the treated paper （mechanical strength and alkalinity） demonstrated that, besides the required deacidification feature and high level of alkali reserves, the immersion treatment by PMS allowed the enhancement of the mechanical intensities of paper arising from the interaction between Si--OH generated in hydrolysis of PMS and C--OH of cellulose on the paper. Adding ethanol into PMS solution could significantly improve mechanical properties of the aged paper treated by the formula apart from modifying the flatness of the paper. Optimized treatment process was achieved by altering the ratio of ethanol to water in PMS-based solutions. Contact angle measurements indicated the occurrence of hydrophobic character of the papers in immersion treatment with PMS-based solutions. The easy availability of the materials and simplicity of the method rendered it convenient for treatment for aged paper documents.
文摘采用不同用量的硅烷偶联剂(KH-550)对纳米Al_2O_3表面进行改性研究,采用红外光谱和粒度仪对改性前后纳米Al_2O_3进行表征;并考察了改性纳米Al_2O_3的用量对芳纶纸抗张强度、介电强度和紧度等性能的影响。结果表明,KH-550能够成功地对纳米Al_2O_3进行改性,并且有助于芳纶纸性能的增强。随着KH-550用量的增加,改性后的纳米Al_2O_3粒径有所减小;纳米Al_2O_3与KH-550最佳配比为5 g∶15 m L,改性纳米Al_2O_3用量为6%时,芳纶纸的抗张指数和介电强度分别提高了58.3%和37.0%,但纸张的紧度变化不明显。
