Biodegradability of PBAT/PLA Films under Controlled Composting Conditions
In order to quickly detect the biodegradability of poly(butylene adipate-co-terephthalate)/polylactic acid(PBAT/PLA)films,this paper refered to the testing method of GB/T 19277.1-2011.The experiment was optimized based on the compost moisture contents,and the final aerobic biodegradation ability of the films under controlled compost conditions was studied.The results show that 45%water content is the most conducive to the compost degradation experiment.The test method based on the decomposed compost as inoculant could meet the standard requirements.The final and relative biodecomposition rates of the tested films are both greater than 90%and could be completely degraded.During the composting experiment,the cumulative CO2 release,biodecomposition rate and relative biodecomposition rate of the films are consistent with the changes of time,which first increase and then decrease,and finally tend to be stable,showing an S-shaped curve.The performance of the three stages of"retardation-biodecomposition-stability"is related to the life activities of microorganisms.
万方数据
维普
