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Probing the nature of cellulosic fibre interfaces with fluorescence resonance energy transfer.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Probing the nature of cellulosic fibre interfaces with fluorescence resonance energy transfer./
作者:	Thomson, Cameron Ian.
面頁冊數:	1 online resource (222 pages)
附註:	Source: Dissertations Abstracts International, Volume: 69-04, Section: B.
Contained By:	Dissertations Abstracts International69-04B.
標題:	Analytical chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3271603click for full text (PQDT)
ISBN:	9780549106937

Probing the nature of cellulosic fibre interfaces with fluorescence resonance energy transfer.
Thomson, Cameron Ian.

Probing the nature of cellulosic fibre interfaces with fluorescence resonance energy transfer. - 1 online resource (222 pages)

Source: Dissertations Abstracts International, Volume: 69-04, Section: B.

Thesis (Ph.D.)--Georgia Institute of Technology, 2007.

Includes bibliographical references

The material properties of fibre networks and fibre reinforced composites are strongly influenced by fibre-fibre interactions. Stress transfer between load bearing elements in such materials is often dictated by the nature of the fibre-fibre interface. Inter-fibre bonding is solely responsible for internal cohesion in paper, because all stresses transferred between fibres operate through fibre-fibre bonds. The future development of cellulosic fibre materials will require an improved understanding of the fibre-fibre interface. Fluorescence resonance energy transfer (FRET) was proposed as a new tool for the study of fibre interfaces. A protocol for covalent linkage of fluorophores to natural and regenerated cellulosic fibres was developed and the absorptive and emissive properties of these dyes were characterized. The fluorescent response of these dyed fibres in paper sheets was studied using steady-state fluorescence spectroscopy. Fluorescence micrographs of fibre crossings on glass slides were analyzed using the FRETN correction algorithm. Energy transfer from coumarin dyed fibres to fluorescein dyed fibres at the interface was observed. The FRETN surfaces for spruce and viscose rayon fibre crossings were distinctly different. The FRET microscopy method was able to detect statistically significant differences in spruce fibre interface development when fibre fraction and wet pressing were varied. The coalescence of natural cellulosic fibre interfaces during drying was also observed with the technique. Polysaccharide films were employed as model systems for the natural and regenerated cellulose fibre interfaces. It was found that pressing cellulose films did not result in significantly increased FRETN either due to resistance to deformation or the inability to participate in interdiffusion. Conversely, xylan films demonstrated a drastic increase in the FRETN signal with increased wet pressing. These results support the previously observed differences between regenerated cellulose fibres and natural wood fibres. The results of the FRETN analysis of the polysaccharide film model systems suggest that lower molecular weight amorphous carbohydrates are likely to be significant contributors to fibre interface development.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9780549106937Subjects--Topical Terms:

3168300
Analytical chemistry.
Subjects--Index Terms:

Cellulosic fibersIndex Terms--Genre/Form:

542853
Electronic books.

Probing the nature of cellulosic fibre interfaces with fluorescence resonance energy transfer.
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