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Aminoethyl substitution enhances the self-assembly properties of an aminocellulose as a potential archaeological wood consolidant.
European Biophysics Journal ( IF 2.2 ) Pub Date : 2020-08-25 , DOI: 10.1007/s00249-020-01451-y
Jennifer M K Wakefield 1, 2 , Robert Hampe 3 , Richard B Gillis 1, 4 , Agnes Sitterli 3 , Gary G Adams 4 , Hartmut Kutzke 5 , Thomas Heinze 3 , Stephen E Harding 1, 5
Affiliation  

The 6-deoxy-6-aminocelluloses—or “aminocelluloses”—are a class of synthetic natural cellulose derivatives which are mostly aqueous soluble and have excellent film-forming properties. Recent studies have connected these properties at the molecular level with protein-like self-associative behaviour for a range of aminocelluloses including a 6-deoxy-6-(ω-aminoethyl) aminocellulose AEA-1 with the association being a two-stage process—a reversible oligomerisation followed by further (semi-reversible) aggregation into larger structures. Here, we synthesise and compare a new 6-deoxy-6-(ω-aminoethyl) aminocellulose AEA-1′ with different degree of substitution with one with further alkyl derivatisation, namely 6-deoxy-6-(ω-hydroxyethyl) aminocellulose HEA-1′. As with AEA-1, sedimentation velocity and sedimentation equilibrium in the analytical ultracentrifuge still show a two-stage process for both AEA-1′ and HEA-1′, with the latter giving higher molar masses. The consequences of these properties for use as consolidants for archaeological wood are considered.



中文翻译:

氨乙基取代增强了作为潜在的考古木材固结剂的氨基纤维素的自组装性能。

6-脱氧-6-氨基纤维素(或“氨基纤维素”)是一类合成的天然纤维素衍生物,主要是水溶性的,并具有出色的成膜性。最近的研究已在分子水平上将这些特性与一系列氨基纤维素(包括6-脱氧-6-(ω-氨基乙基)氨基纤维素AEA-1)的类蛋白质自缔合行为联系在一起,缔合是一个两阶段过程,可逆的低聚,然后进一步(半可逆)聚集成更大的结构。在这里,我们合成并比较了一种具有不同取代度的新型6-脱氧-6-(ω-氨基乙基)氨基纤维素AEA-1',其中一种具有进一步的烷基衍生化作用,即6-脱氧-6-(ω-羟乙基)氨基纤维素HEA -1'。与AEA-1一样,分析型超速离心机中的沉降速度和沉降平衡仍然显示出AEA-1'和HEA-1'的两阶段过程,后者的摩尔质量较高。考虑了这些性质用作考古木材的固结剂的后果。

更新日期:2020-08-26
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