中文摘要：

研制了一种文物保护用湿固化聚氨酯加固剂,利用分光光度计、万能材料试验机等对其透光性、机械性能和吸水性进行了表征,并应用于出土竹笥和炭化宣纸的加固保护。实验结果表明,聚氨酯薄膜无色透明,可见光区透光率为90%;断裂延伸率高达351.09%;水浸泡24 h后吸水率达53.65%,干燥后未出现明显形变,韧性和质量基本恢复到浸泡前状态。加固后竹笥和炭化宣纸的机械性能显著提高,加固效果良好;炭化宣纸表面肉眼无法识别的字迹信息经多光谱摄影后清晰可见。该研究为高湿环境下脆弱有机质文物加固、炭化纸质文物字迹恢复提供了一条新的途径。

英文摘要：

In this work,a kind of moisture curable polyurethane（MCPU） for the conservation of cultural relics was synthesized.Instruments such as a spectrophotometer and a universal material testing machine were utilized to test the transmittance,mechanical property and water absorption ability of MCPU.In addition,MCPU was performed to consolidate the carbonizedxuan paper and the zhusi residues（a kind of vessels which was made of plant fiber） excavated in the archaeological sites.The results illustrated that the cured MCPU film was transparent with 90% light transmittance and the fracture elongation rate could reach 351.09%.The water absorption rate climbed to 53.65% after being immersed in water for 24 hours,the toughness and quality recovered to the original conditions before immersion and there were no discolorations,blisters,spots or obvious deformations after dehydration.The consolidation experiment showed that the mechanical properties of the zhusi and the carbonized xuan paper improved significantly after reinforcement with MCPU,and the manuscript information which could not be observed on the carbonized xuan paper could be clearly identified by a multispectral photography.Consequently,this work provides a new way for the consolidation of fragile organic relics in the humid environment and as well as the recovery of the manuscript on carbonized paper.