Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution
Abstract Flash-spun nonwoven (FS-NW) is gaining attention in the PPE field due to its excellent barrier and mechanical properties resulting from its non-uniform diameter distribution and unique filament morphology. The unique network structure of flash-spun filaments (FSF) comprising the FS-NW can b...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-22781-1 |
| _version_ | 1811192421501894656 |
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| author | Jae-Hyung Wee Younghwan Bae Nam Pil Cho Moo Sung Kim Won Jun Lee Sang Young Yeo |
| author_facet | Jae-Hyung Wee Younghwan Bae Nam Pil Cho Moo Sung Kim Won Jun Lee Sang Young Yeo |
| author_sort | Jae-Hyung Wee |
| collection | DOAJ |
| description | Abstract Flash-spun nonwoven (FS-NW) is gaining attention in the PPE field due to its excellent barrier and mechanical properties resulting from its non-uniform diameter distribution and unique filament morphology. The unique network structure of flash-spun filaments (FSF) comprising the FS-NW can be controlled by phase separation behavior in the supercritical fluid (SCF) process. This study proposes a simple method to control the microstructure of FSFs by controlling the pressure-induced phase separation (PIPS) process in polymer/SCF solution. This phase separation behavior of an HDPE/SCF solution was confirmed by using a high-pressure view cell. A multistage nozzle allowing for phase-separated pressure to form different phases was also designed. HDPE-FSFs were synthesized by flash-spinning, and their morphology, crystallinity, and mechanical properties were investigated. The results demonstrated that the filaments obtained by PSP control at 220 °C and with an HDPE concentration of 8 wt% showed a network structure composed of strands, wherein the diameters ranged from 1.39 to 40.9 μm. Optimal FSF was obtained at 76 bar, with a crystallinity of 64.0% and a tenacity of 2.88 g/d. The PIPS method can thus effectively control the microstructure more feasibly than temperature- or solvent-induced techniques and can allow the effective synthesis of various products. |
| first_indexed | 2024-04-11T23:52:28Z |
| format | Article |
| id | doaj.art-ee34c9d2c0874bdbb269dae5e727cc5d |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T23:52:28Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-ee34c9d2c0874bdbb269dae5e727cc5d2022-12-22T03:56:27ZengNature PortfolioScientific Reports2045-23222022-10-011211910.1038/s41598-022-22781-1Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solutionJae-Hyung Wee0Younghwan Bae1Nam Pil Cho2Moo Sung Kim3Won Jun Lee4Sang Young Yeo5Advanced Textile R&D Department, Korea Institute of Industrial TechnologyAdvanced Textile R&D Department, Korea Institute of Industrial TechnologyAdvanced Textile R&D Department, Korea Institute of Industrial TechnologyDepartment of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National UniversityDepartment of Fiber System Engineering, Dankook UniversityAdvanced Textile R&D Department, Korea Institute of Industrial TechnologyAbstract Flash-spun nonwoven (FS-NW) is gaining attention in the PPE field due to its excellent barrier and mechanical properties resulting from its non-uniform diameter distribution and unique filament morphology. The unique network structure of flash-spun filaments (FSF) comprising the FS-NW can be controlled by phase separation behavior in the supercritical fluid (SCF) process. This study proposes a simple method to control the microstructure of FSFs by controlling the pressure-induced phase separation (PIPS) process in polymer/SCF solution. This phase separation behavior of an HDPE/SCF solution was confirmed by using a high-pressure view cell. A multistage nozzle allowing for phase-separated pressure to form different phases was also designed. HDPE-FSFs were synthesized by flash-spinning, and their morphology, crystallinity, and mechanical properties were investigated. The results demonstrated that the filaments obtained by PSP control at 220 °C and with an HDPE concentration of 8 wt% showed a network structure composed of strands, wherein the diameters ranged from 1.39 to 40.9 μm. Optimal FSF was obtained at 76 bar, with a crystallinity of 64.0% and a tenacity of 2.88 g/d. The PIPS method can thus effectively control the microstructure more feasibly than temperature- or solvent-induced techniques and can allow the effective synthesis of various products.https://doi.org/10.1038/s41598-022-22781-1 |
| spellingShingle | Jae-Hyung Wee Younghwan Bae Nam Pil Cho Moo Sung Kim Won Jun Lee Sang Young Yeo Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution Scientific Reports |
| title | Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution |
| title_full | Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution |
| title_fullStr | Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution |
| title_full_unstemmed | Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution |
| title_short | Enhancing mechanical properties of flash-spun filaments by pressure-induced phase separation control in supercritical high-density polyethylene solution |
| title_sort | enhancing mechanical properties of flash spun filaments by pressure induced phase separation control in supercritical high density polyethylene solution |
| url | https://doi.org/10.1038/s41598-022-22781-1 |
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