摘要
选择合适的保护材料对化石保护是至关重要的。本文通过实验对两种保护材料的性能进行了分析,并将其涂覆在硅化木材料上,通过光泽度、吸水率、透气率和抗折强度,分析其保护性能,并就耐紫外老化性、耐盐雾腐蚀性进行了实验。结果表明:新型保护材料密度与水相近,具有较好的流动性和渗透性,添加纳米SiO2的保护材料的吸水率比空白试样低24.3%,未加纳米SiO2低16.9%,两者都有效地阻止了水分的渗入;硅化木涂覆未加纳米SiO2的保护材料后,光泽度增加了58.06%,添加纳米SiO2保护材料涂覆硅化木后光泽度仅增加15.8%,因而能较好的保持化石原貌,满足文物保护要求;100 h后在碱性溶液中两种保护材料均有发白现象且未加纳米SiO2的较为严重,而酸性溶液中两者无明显变化,利用光化学反应仪对涂覆试样进行紫外光老化,200 h后两种保护材料产生发白现象且未加纳米SiO2的尤为严重;盐雾试验的结果证明纳米SiO2的加入在一定程度上提高了保护材料的耐盐雾腐蚀性。
The selection of suitable conservation materials is crucial for fossil conservation. In this paper, the properties of two protective materials were analyzed through experiments, and they were coated on silicified wood materials. Through gloss, water absorption, air permeability and flexural strength, the protective properties were analyzed, and the resistance to ultraviolet aging was analyzed. Salt spray corrosion resistance was tested. The results show that the density of the new protective material is similar to that of water, and it has good fluidity and permeability. The water absorption rate of the protective material with nano-SiO2is 24.3 % lower than that of the blank sample, and the water absorption rate of the protective material without nano-SiO2is 16.9 % lower, both of which are effective The infiltration of water is prevented;after the silicified wood is coated with the protective material without nano-SiO2, the gloss is increased by 58.06 %,and the gloss is only increased by 15.8 % after the nano-SiO2protective material is added to the silicified wood, so it can be well maintained. The original appearance of the fossils meets the requirements of cultural relics protection;after 100 hours, the two protective materials have whitening phenomenon in the alkaline solution,and the nano-SiO2is not added, and the two have no obvious changes in the acidic solution. The coated samples were subjected to ultraviolet light aging. After 200 h,the two protective materials had whitening phenomenon and the nano-SiO2was not added. The results of the salt spray test proved that the addition of nano-SiO2improves the salt spray corrosion resistance of the protective material to a certain extent.
作者
苏青
龚敏
黄霞
邓建国
Su Qing;Gong Min;Huang Xia;Deng Jianguo(School of Materials Science and Engineering,Sichuan University of Technology,Zigong 643000;Sichuan Key Laboratory of Material Corrosion and Protection,Zigong 643000,China)
出处
《广东化工》
CAS
2023年第4期29-31,70,共4页
Guangdong Chemical Industry
基金
四川省科技计划项目(2021YFS0401)。
关键词
硅化木
保护材料
纳米SIO2
文物保护
petrified wood
protective material
nano-SiO2
cultural relics protection
作者简介
苏青(1991-),男,江苏徐州人,助理实验师,主要研究方向为纳米保护材料/建筑材料。;通讯作者:邓建国(1966-),男,四川成都人,教授,学士,主要研究方向为古生物化石保护材料/纳米材料。
