Comparison of biodegradation of low-weight hydroentangled raw cotton nonwoven fabric and that of commonly used disposable nonwoven fabrics in aerobic Captina silt loam soil

被引：34

作者：

Nam, Sunghyun ^{[1
]}

Slopek, Ryan ^{[1
]}

Wolf, Duane ^{[2
]}

Warnock, Mary ^{[2
]}

Condon, Brian D. ^{[1
]}

Sawhney, Paul ^{[1
]}

Gbur, Edward ^{[2
]}

Reynolds, Michael ^{[1
]}

Allen, Chuck ^{[1
]}

机构：

[1] ARS, USDA, So Reg Res Ctr, 1100 Robert E Lee Blvd, New Orleans, LA 70124 USA

[2] Univ Arkansas, Dale Bumpers Coll Agr Food & Life Sci, Fayetteville, AR 72701 USA

来源：

TEXTILE RESEARCH JOURNAL | 2016年 / 86卷 / 02期

关键词：

hydroentangled nonwoven; biodegradation; first-order kinetics; raw cotton; wipes; DEGRADATION; CELLULOSE; FIBERS; TEMPERATURE; POLYLACTIDE;

D O I：

10.1177/0040517514551468

中图分类号：

TB3 [工程材料学]; TS1 [纺织工业、染整工业];

学科分类号：

0805 ; 080502 ; 0821 ;

摘要：

The increasing use of synthetic disposable nonwoven products generates a large amount of non-biodegradable solid waste. In an effort to enhance the use of raw cotton in nonwoven wipes applications, this study compares the biodegradation of low-weight nonwoven fabrics (around 50 g/m(2)) made of mechanically pre-cleaned raw cotton, rayon, polypropylene (PP), and polylactic acid (PLA) in a Captina silt loam soil. The biodegradation rates of raw cotton and rayon fabrics were fitted to the first-order kinetics model with half-life values of 12.6 and 7.6 days, respectively. The slightly faster disintegration of cellulose structure for rayon was confirmed by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) spectra, and distinct morphological changes in the fiber (cracks and breakage were prevalent in raw cotton, whereas the thinning and merging of fibers occurred in rayon) were observed during their biodegradation. PLA and PP nonwoven fabrics exhibited no weight loss during the burial periods studied, but showed some evidence of oxidation in ATR-FTIR spectra. The breaking and burst strengths of PLA fabric decreased by 45% and 23% of the original strengths, respectively, while neither significantly decreased in PP fabric. The results suggest that mixing raw cotton or rayon low-weight nonwoven wastes with surface soil provides an alternative disposal method, but this land application could not be recommended for PLA and PP nonwoven wastes.

引用

页码：155 / 166

页数：12