Study on removal of salt from iron artifacts that came out of underground at histrical places by using alkaline solutions containing fluorinated oligomers

使用含氟化低聚物的碱性溶液去除历史地点地下铁制品中盐分的研究

• 批准号: 12680160
• 负责人: KAWAGOE Mikio
• 金额: $ 0.32万
• 依托单位: NARA NATIONAL COLLEGE TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680160/
• 关键词: Conservation Science; histrical iron aftifacts; alkaline solution method; fluorinated oligomer; long-term conservation; removal rate of salt; errective diffusion coefficient; penetration rate; 保存処理; 遺跡出土鉄器; 脱塩処理

Using rusted iron disks pressed artificially, effects of fluorinated oligomers added to alkaline solutions on removal of salt were investigated. As a result, addition of fluorinated oligomer to KOH solution was found to bring improvement on removal of salt compared with the sesquicarbonate solution that have been applied in practice. Also, we found that betaine-type oligomers are adapted for removal of salt. To find which type of betaine is adequate for this purpose, we investigated the effects of fluorinated oligomers on removal of salt experimetally.Amount of salt removed for KOH aqueous solution containing SK-6, betaine-type oligomer with hydrophilic group and long chains of fluorinated group, increased 3.7 times as much as that for the sesquicarbonate solution. On the other hand, an oligomer, SK-15, with hydrophobic group was found to prevent the iron disk from rusting.Next, we investigated the effects of the oligomers on long-term conservation of iron artifacts treated by alkaline … More solutions containing betaine-type fluorinated oligomers. We used test pieces which had been kept in our romm for 14 to 18 months. Then, the test piece was suspended in a 100 mL bottle with water on the bottom, which was kept in air to prevent from contacting with water. After that, change in weight was measured. From the results, we found that increments of dry weight of the test pieces were 5.9 times for sesquicarbonate, 2.5 times for SK-15, 2.2 times for SK-2, 1.3 times for SK-6 compared to that for KOH solution without oligomers. The increment in weight due to re-rusting decreased with increasing the amount of salt removed.Consequently, we found that re-rusting in a short period after removal treatment of salt by alkaline solution containing fluorinated oligomer was suppressed by the hydrophobic group in the betaine-type oligomer, and re-rusting in long-term conservation will depend on the amount of salt remainted in the iron artifacts. Hence, the SK-6 is considered to be adequate as an additive to alkaline solution for removal of salt, because in our experiment addition of the SK-6 most improved the removal of salt. Less

采用人工压制的锈铁片，研究了碱性溶液中添加含氟低聚物对除盐效果的影响。结果发现，与已在实践中应用的倍半氯化钠溶液相比，将氟化低聚物添加到KOH溶液中可以改善盐的去除。此外，我们发现甜菜碱型低聚物适合于去除盐。为了寻找合适的甜菜碱类型，我们对含氟低聚物的除盐效果进行了实验研究，结果表明，含氟低聚物SK-6的KOH水溶液的除盐量比倍半氟高出3.7倍。另一方面，我们发现了一种具有疏水基团的低聚物SK-15，它可以防止铁盘生锈。接下来，我们研究了低聚物对碱性处理的铁文物长期保存的影响 ...更多信息 含有甜菜碱型氟化低聚物的溶液。我们使用的试件已经在我们的房间里保存了14到18个月。然后，将试验片悬浮在底部有水的100 mL瓶中，将其保持在空气中以防止与水接触。之后，测量重量变化。从结果中，我们发现，与不含低聚物的KOH溶液相比，试样的干重增量对于倍半甘油为5.9倍，对于SK-15为2.5倍，对于SK-2为2.2倍，对于SK-6为1.3倍。结果表明，含氟低聚物碱性溶液除盐处理后，甜菜碱型低聚物中的疏水基团抑制了铁文物在短期内的重锈，而铁文物在长期保存中的重锈则取决于含氟低聚物中的含盐量。因此，SK-6被认为足以作为碱性溶液的除盐添加剂，因为在我们的实验中，SK-6的加入最大程度地改善了盐的去除。少

项目成果

Mikio Kawagoe, Kiyomi Yamaguchi, Hideo Sawada and Kozo Kawamoto: "Effects of addition of fluorinated oligomers on removal treatment of salt"Research Reports of Nara National College of Technology. Vol. 37. 85-88 (2001)

Mikio Kawagoe、Kiyomi Yamaguchi、Hideo Sawada、Kozo Kawamoto：“添加氟化低聚物对除盐处理的影响”奈良工业大学研究报告。

河越幹男, 山口清美, 澤田英夫, 川本耕三: "含塩鉄器からの脱塩処理に及ぼす含フッ素オリゴマーの影響"奈良工業高等専門学校研究紀要. 37号. 85-88 (2001)

Mikio Kawagoe、Kiyomi Yamaguchi、Hideo Sawada、Kozo Kawamoto：“含氟低聚物对含盐铁器脱盐处理的影响”奈良工业大学通报第 37. 85-88 号（2001 年）。

河越幹男, 山口清美, 澤田英夫, 川本耕三: "有錆鉄器の脱塩処理に及ぼす含フッ素オリゴマーの添加効果とその速度論的研究"日本文化財科学会第17回大会要旨集. 188-189 (2000)

Mikio Kawagoe、Kiyomi Yamaguchi、Hideo Sawada、Kozo Kawamoto：“添加含氟低聚物对生锈铁器脱盐处理的影响及其动力学研究”第17届日本文化财产学会会议论文集188。 -189 (2000)

河越幹男, 山口清美, 澤田英夫, 川本耕三: "圧縮成型含塩鉄器からの脱塩処理に及ぼす含フッ素オリゴマーの添加効果"日本文化財科学会誌「考古学と自然科学」. 43号(印刷中). (2002)

川越干雄、山口清美、泽田英夫、川本幸三：“添加含氟低聚物对压缩成型含盐铁器脱盐处理的效果”日本文化财产学会会刊《考古学与自然科学》No 43（目前正在印刷）（2002）。

Mikio Kawagoe, Kiyomi Yamaguchi, Hideo Sawada and Kozo Kawamoto: "Effects of addition of betaine-type fluorinated oligomers on removal treatment of salt"The 18th Annual Meeting of The Society for Scientific studies on Cultural Property. 194-195 (2001)

川越干男、山口清美、泽田秀雄、川本幸三：“添加甜菜碱型含氟低聚物对除盐处理的效果”文化财产科学研究会第18届年会。