期刊
MOLECULES
卷 27, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/molecules27072133
关键词
analytical ultracentrifugation; Butvar B-98; PDMS-OH; Oseberg artefacts
资金
- UK Engineering & Physical Sciences Research Council [EP/L015633/1]
- Norwegian Ministry of Education and Research
- University of Oslo as part of the Saving Oseberg project
- UK EPSRC Centre for Doctoral Training award
Butvar B-98 and PDMS-OH have been identified as effective consolidants for archaeological wood. They offer an alternative to aqueous-based consolidants as they are soluble in organic solvents. Extensive characterization studies have been conducted on these polymers to provide conservators with information about their physical properties.
Butvar B-98 and PDMS-OH both have a demonstrable ability as consolidants for archaeological wood. This makes them both potential treatment options for the Oseberg collection, which is one of the most important archaeological finds from the Viking era. Both Butvar B-98 and PDMS-OH are soluble in organic solvents, offering a useful alternative to aqueous-based consolidants. Extensive characterisation studies were carried out on both of these polymers, with the use of analytical ultracentrifugation and viscometry, for the benefit of conservators wanting to know more about the physical properties of these materials. Short column sedimentation equilibrium analysis using SEDFIT-MSTAR revealed a weight-average molar mass (weight-average molecular weight) M-w of (54.0 +/- 1.5) kDa (kg center dot mol(-1)) for Butvar B-98, while four samples of PDMS-OH siloxanes (each with a different molar mass) had an M-w of (52.5 +/- 3.0) kDa, (38.8 +/- 1.5) kDa, (6.2 +/- 0.7) kDa and (1.6 +/- 0.1) kDa. Sedimentation velocity confirmed that all polymers were heterogeneous, with a wide range of molar masses. All molecular species showed considerable conformational asymmetry from measurements of intrinsic viscosity, which would facilitate networking interactions as consolidants. It is anticipated that the accumulated data on these two consolidants will enable conservators to make a more informed decision when it comes to choosing which treatment to administer to archaeological artefacts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据