Film Recovery Constraints on Optical and Gravimetric Assessment of Pulsed Gas–Solid Cleaning of Model Plastic Films
- 1College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- 2Shanghai Tianqiang Environmental Technology Co., Ltd., Shanghai 201415, China
Abstract
Cleaning-induced mass changes depend on which films enter the post-cleaning weighing. This study quantifies that dependence using 84 model film runs in an established pulsed gas–solid apparatus and a laboratory stirred water reference. The count-matched weighing criterion retained 26 runs (31.0%): 24.0% of dry cleaning runs and 88.9% of stirred water reference runs. Ten of 21 groups had no eligible gravimetric observation. In one incomplete recovery run, assigning the mean initial clean film mass to the unweighed piece gave a scenario contribution of 19.5 percentage points of the unrestricted gravimetric index, illustrating potential bias without correcting the observation. Optical normalization denominators ranged from 68.0 to 76.2 percentage points; separately selected films introduced a conditional sampling uncertainty component of 0.33–0.99 percentage points in optical recovery. At 120 s, the nominal 5 g polyethylene (PE) configuration had 15.2 percentage point lower mean optical recovery than the 3 g configuration despite similar film count recovery. Reporting recovery-dependent coverage alongside each endpoint keeps laboratory comparisons tied to the film populations actually measured.
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BibTeX
@article{yu2026film,
title = {{Film Recovery Constraints on Optical and Gravimetric Assessment of Pulsed Gas–Solid Cleaning of Model Plastic Films}},
author = {Chaojie Yu and Junqing Xu and Xichao Hu and Haochen Zhu and Guangming Li},
journal = {Polymers},
year = {2026},
month = oct,
doi = {10.3390/polym18202593},
url = {https://www.mdpi.com/2073-4360/18/20/2593},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Film Recovery Constraints on Optical and Gravimetric Assessment of Pulsed Gas–Solid Cleaning of Model Plastic Films
AU - Chaojie Yu
AU - Junqing Xu
AU - Xichao Hu
AU - Haochen Zhu
AU - Guangming Li
PY - 2026
DA - 2026/10/01
JO - Polymers
DO - 10.3390/polym18202593
UR - https://www.mdpi.com/2073-4360/18/20/2593
AB - Cleaning-induced mass changes depend on which films enter the post-cleaning weighing. This study quantifies that dependence using 84 model film runs in an established pulsed gas–solid apparatus and a laboratory stirred water reference. The count-matched weighing criterion retained 26 runs (31.0%): 24.0% of dry cleaning runs and 88.9% of stirred water reference runs. Ten of 21 groups had no eligible gravimetric observation. In one incomplete recovery run, assigning the mean initial clean film mass to the unweighed piece gave a scenario contribution of 19.5 percentage points of the unrestricted gravimetric index, illustrating potential bias without correcting the observation. Optical normalization denominators ranged from 68.0 to 76.2 percentage points; separately selected films introduced a conditional sampling uncertainty component of 0.33–0.99 percentage points in optical recovery. At 120 s, the nominal 5 g polyethylene (PE) configuration had 15.2 percentage point lower mean optical recovery than the 3 g configuration despite similar film count recovery. Reporting recovery-dependent coverage alongside each endpoint keeps laboratory comparisons tied to the film populations actually measured.
SN - 2073-4360
ER -