| Autor: |
Needles, H. L., Alger, K. W., Meyer, R. D., Schenter, K., Kristinsdottir, T. E., Cheung, T. W., Tafoya, L. I. |
| Předmět: |
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| Zdroj: |
Book of Papers, National Technical Conference of AATCC; 1994, p330-337, 8p |
| Abstrakt: |
Seven fabrics of similar constructions but six different fiber types (bleached and unbleached cotton, rayon, nylon 6,6, polyester, acrylic, and polypropylene) were buried in an acidic red soil (Red Bluff Loam) and in a less acidic soil (Yolo Silt Loam) under aerobic and anaerobic conditions for up to 32 weeks. The pH of the soils varied from 3.5 to .9 for Red Bluff Loan and from 5.4 to 6.3 for the Yolo Silt Loam during the study. Fabric samples were removed periodically, washed with distilled water and dried prior to examination. All the cellulosic fabrics decomposed completely during the 32 week period. Rayon tended to decompose somewhat faster than the cotton samples, with the bleached and unbleached cotton samples decomposing at similar rates. All cellulosic fabrics decomposed much more rapidly in Yolo silt loam than in Red Bluff loam under aerobic conditions, but cellulosic fabrics decomposed more rapidly under anaerobic than under aerobic conditions in Red Bluff loam presumably due to the low biological activity of the acidic Red Bluff soil. The cellulosic fabrics showed a loss in crystallinity as they decomposed. The synthetic fabrics showed little or no decomposition during burial, except for nylon 6,6 that showed a loss in tensile properties. No changes in infra-red spectra of any of these synthetic fabrics were found. Scanning electron microscopy showed that the cellulosics were damaged before they completely digested during burial. The synthetic fabrics showed little to no biological damage but some mechanical damage during burial. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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