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Zhang T, Zhang J, Hou H, Xu Y, Chen K. Down-film as a new non-frame porous material for sound absorption. Sci Rep 2024; 14:11572. [PMID: 38773298 PMCID: PMC11109236 DOI: 10.1038/s41598-024-62526-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/17/2024] [Indexed: 05/23/2024] Open
Abstract
Down-polyethylene film material has been introduced for the first time as an excellent non-frame sound absorber, showing a distinctively outstanding performance. It contains down fiber adjacent to each other without firm connection in between, forming a structure of elastic fiber network. The unique structure has broadband response to sound wave, showing non-synchronous vibration in low and middle frequency and synchronous vibration in middle and high frequency. The broadband resonance in middle and high frequency allows the structure to achieve complete sound absorption in resonance frequency band. Moreover, down-polyethylene film material possesses forced vibration, corresponding sound absorption coefficient has been obtained based on vibration theory. The down-film sound absorption material has the characteristics of light weight, soft, environment-friendly, and has excellent broadband sound absorption performance.
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Affiliation(s)
- Tingying Zhang
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, China
| | - Jiyang Zhang
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, China
| | - Hong Hou
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, China.
| | - Ying Xu
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, China.
| | - Kean Chen
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, China
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Deng L, Wang L, Li L, Gong Z, Wang R, Fei W, Zhou Y, Wang F. Bioabsorbable Fibrillar Gauze Dressing Based on N-Carboxyethyl Chitosan Gelling Fibers for Fatal Hemorrhage Control. ACS APPLIED BIO MATERIALS 2023; 6:899-907. [PMID: 36691985 DOI: 10.1021/acsabm.2c01089] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Death from lethal hemorrhage remains a major problem in various emergency scenarios. There is a continuous interest in the development of absorbable hemostatic dressings that can control hemorrhage rapidly and can be left in the wound site without removal. In this study, we report a hemostatic gauze dressing based on N-carboxyethyl chitosan (CECS) gelling fibers. The CECS fibrillar gauze combines ultra-hydrophilic, cationic chemical property of the fiber components with the fluffy nonwoven material form, exhibiting good conformability for wound filling, high fluid uptaking capacity, and enhanced blood-concentrating effect. In a swine femoral artery injury model, the CECS fibrillar gauze achieves shorter time to hemostasis and less blood loss compared with commercially available hemostatic dressings. This chitosan gelling fiber gauze demonstrates comparable bioabsorbability to clinically used absorbable hemostat and thus may be applied to treat fatal hemorrhage both in emergency medical services and in internal surgical procedures.
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Affiliation(s)
- Lili Deng
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, China
| | - Liu Wang
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, China
| | - Li Li
- Department of Orthopaedics and Traumatology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200120, China
| | - Zuguang Gong
- College of Materials Science and Engineering and Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, China
| | - Ruilan Wang
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, China
| | - Wendi Fei
- Department of Orthopaedics and Traumatology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200120, China
| | - Yingshan Zhou
- College of Materials Science and Engineering and Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, China
| | - Fang Wang
- Department of Orthopaedics and Traumatology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200120, China
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Recycling of Nonwoven Polyethylene Terephthalate Textile into Thermal and Acoustic Insulation for More Sustainable Buildings. Polymers (Basel) 2021; 13:polym13183090. [PMID: 34577991 PMCID: PMC8467680 DOI: 10.3390/polym13183090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 11/17/2022] Open
Abstract
The construction and building sector is responsible for a large share of energy and material used during the life cycle of a building. It is therefore crucial to apply a circular economy model within the process wherever possible to minimize the impact on the environment. In this paper, the possibility of producing thermal and acoustic boards from industrial nonwoven waste textile is studied and presented. The nonwoven polyester textile obtained directly from the production line in the form of strips and bales was first shredded into smaller fractions and then in the form of pile compressed with a hot press to form compact thermal insulation boards. The first set of specimens was prepared only from waste polyester nonwoven textile, whereas the second set was treated with sodium silicate in order to check the material’s reaction to fire performance. The experimental work was conducted to define the acoustic properties, reaction to fire behavior and thermal conductivity of the produced specimens. The obtained results show that the thermal conductivity coefficient of specimens without added water glass dissolution is near to the values of conventional materials used as thermal insulation in buildings. The reaction to fire testing proved that the addition of water glass actually propagates the progressive flame over the entire product. It can be concluded that the presented thermal insulation can be used as an adequate and sustainable solution for building construction purposes.
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