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Li W, Zhang Y, Guo S, Yu Z, Kang J, Li Z, Wei L, Tan SC. Multifunctional Sandwich-Structured Super-Hygroscopic Zinc-Based MOF-Overlayed Cooling Wearables for Special Personal Thermal Management. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311272. [PMID: 38366302 DOI: 10.1002/smll.202311272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Indexed: 02/18/2024]
Abstract
Personal protective equipment pays attention exclusively to external safety protection and ignores the internal thermoregulation of physiological state in association with sweating. Herein, a super-hygroscopic calcium-doped poly(sodium 4-styrenesulfonate) and superhydrophobic metal-organic-framework-overlayed wearables (Ca-PSS/MOF) integrated cooling wearable is proposed for special personal thermal management (PTM). Compared to the pristine fabric, the superhydrophobic MOF wearables exhibit anti-fouling and antibacterial capabilities, and the antibacterial efficiency is up to 99.99% and 98.99% against E. coli and S. aureus, respectively. More importantly, Ca-PSS/MOF demonstrate significant heat index changes up to 25.5 °C by reducing relative humidity dramatically from 91.0% to 60.0% and temperature from 36.5 to 31.6 °C during the running test. The practical feasibility of the Ca-PSS/MOF cooling wearables is well proved with the protective suit of the fireman. Owing to these multifunctional merits, the sandwich-structured cooling Ca-PSS/MOF are expected to provide new insights for designing the next-generation multifunctional apparel for PTM.
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Affiliation(s)
- Wulong Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215021, P. R. China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574
- Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798
| | - Yaoxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 201306, P. R. China
| | - Shuai Guo
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574
| | - Zhen Yu
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Jialiang Kang
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215021, P. R. China
| | - Zhanxiong Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215021, P. R. China
- National Engineering Laboratory for Modern Silk, Suzhou, 215123, P. R. China
| | - Lei Wei
- Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798
| | - Swee Ching Tan
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574
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2
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Exss K, Wegertseder-Martínez P, Trebilcock M. A systematic review of Personal Comfort Systems from a post-phenomenological view. ERGONOMICS 2024:1-24. [PMID: 38318846 DOI: 10.1080/00140139.2024.2310079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 01/22/2024] [Indexed: 02/07/2024]
Abstract
Personal Comfort Systems (PCS) are equipments that heat and/or cool occupants without affecting surrounding environments, ranging from commonly used devices to innovative technologies, and that tend to be controlled by people. These systems aim to address energy consumption and occupant satisfaction issues related to centralised air-conditioning. Although there are systematic studies on these systems, there is a lack of documentation regarding mediation characteristics between people and the built environment. This article presents a systematic review of PCS using a search of academic literature and patents, classifying PCS based on thermal categories and device typologies while introducing post-phenomenological mediation categories. The results show that most PCS fall into the thermal categories of 'Heating' and 'Cooling and ventilation'. The review also presents a view of the PCS territory based on mediation attributes and technological complexity. Finally, the PCS' characteristics are discussed based on the post-phenomenological concepts of Embodiment, Hermeneutic, and Background providing insights for future research opportunities and PCS development.
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Affiliation(s)
- Katherine Exss
- Escuela de Arquitectura y Diseño, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | | | - Maureen Trebilcock
- Departamento de Diseño y Teoría de la Arquitectura, Universidad del Bío-Bío, Concepcion, Chile
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3
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Wang X, Lai B, Yan R, Li Y, Ning B, Wang Q. Enhancing physiological recovery and subsequent exercise performance in the heat using a phase-change material cooling blanket. J Therm Biol 2024; 119:103810. [PMID: 38350267 DOI: 10.1016/j.jtherbio.2024.103810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/24/2023] [Accepted: 01/26/2024] [Indexed: 02/15/2024]
Abstract
This study aimed to assess the effect of a phase-change material (PCM) cooling blanket for cooling between exercise bouts on recovery of physiological parameters and subsequent exercise performance in the heat. Eighteen male volunteers were recruited to participate in human trials involving two exhaustive treadmill running bouts (Bout1 for 3 km and Bout2 for 1.5 km) in a climate chamber (temperature = 33 °C; relative humidity = 40%). Participants were randomly subjected to one of two cooling conditions for a 10-min period between exercise bouts: CON: natural cooling; 10-min PCM: with a PCM cooling blanket for 10 min. Several physiological parameters including mean skin temperature (Tskin), oral temperature (Toral), core temperature (Tcore), heart rate (HR), mean arterial pressure (MAP), respiratory rate (RR), peripheral capillary oxygen saturation (SpO2), average running speed and rating of perceived exertion (RPE) scale score were analyzed. The results showed that compared to the CON group, participants in the 10-min PCM group had a significant lower Tskin, Tcore, HR and RR at post-cooling, as well as greater reductions in mean skin temperature (ΔTskin) and core temperature (ΔTcore) from post-Bout1 to post-cooling. Additionally, the 10-min PCM group exhibited significantly lower peak Tcore, peak HR and RPE scale score during Bout2, while the average running speed during Bout2 was significantly higher. The present study suggests that cooling with a PCM cooling blanket can enhance physiological recovery and subsequent exercise performance in the heat.
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Affiliation(s)
- Xin Wang
- Department of Critical Care Medicine, The Fifth Medical Center of Chinese PLA General Hospital, No.8 of East Street, Beijing, 100071, China
| | - Bin Lai
- Department of Emergency Medicine, The Third Medical Center of Chinese PLA General Hospital, No.69 of Yongding Road, Beijing, 100039, China
| | - Rui Yan
- Department of Thoracic Surgery, The Third Medical Center of Chinese PLA General Hospital, No.69 of Yongding Road, Beijing, 100039, China
| | - Yan Li
- Department of Critical Care Medicine, The Fifth Medical Center of Chinese PLA General Hospital, No.8 of East Street, Beijing, 100071, China
| | - Bo Ning
- Department of Intensive Care Unit, Air Force Medical Center of China, No.30 of Fucheng Road, Beijing, 100142, China.
| | - Qian Wang
- Department of Emergency Medicine, The Third Medical Center of Chinese PLA General Hospital, No.69 of Yongding Road, Beijing, 100039, China.
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4
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Lu J, Jiang G. Guarding skin under PPE: Mechanistic insights and technological innovations. Skin Res Technol 2023; 29:e13520. [PMID: 38009022 PMCID: PMC10626285 DOI: 10.1111/srt.13520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 10/24/2023] [Indexed: 11/28/2023]
Abstract
In the presence of diseases transmitted through respiratory droplets and direct contact, healthcare workers (HCWs) necessitate the use of personal protective equipment (PPE). For optimal safety, PPE should securely conform to the skin during extended wear. However, conventional PPE often lacks adequate air permeability and hygroscopicity, trapping heat and moisture emitted by the body within the enclosure. Such a hot and humid internal environment can induce skin damage, such as erythema, rash, pruritus, and itching among others, leading to microbial growth on the skin surface, the production of inflammatory mediators at the wound site and an increased risk of infection. This review strives to comprehensively elucidate the fundamental mechanisms triggering adverse skin reactions and their resultant manifestations. Furthermore, we explore recent advancements aimed at inhibiting these mechanisms to effectively mitigate the occurrence of skin lesions.
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Affiliation(s)
- Junru Lu
- Department of DermatologyAffiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsuChina
- Xuzhou Medical UniversityXuzhouJiangsuChina
| | - Guan Jiang
- Department of DermatologyAffiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsuChina
- Xuzhou Medical UniversityXuzhouJiangsuChina
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5
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Rizvi IH, Udayraj. A modified Kalman filter-based model for core temperature estimation during exercise and recovery with/without personal cooling interventions. J Therm Biol 2022; 109:103307. [DOI: 10.1016/j.jtherbio.2022.103307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/27/2022] [Accepted: 08/18/2022] [Indexed: 11/29/2022]
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6
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Yang J, Zhang X, Koh JJ, Deng R, Kumarasamy S, Xu YX, Qu H, Zhang S, Zhang Y, Tan SC. Reversible Hydration Composite Films for Evaporative Perspiration Control and Heat Stress Management. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107636. [PMID: 35187798 DOI: 10.1002/smll.202107636] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Donning of personal protective equipment (PPE) in the healthcare sector has been intensified by the on-going COVID-19 pandemic around the globe. While extensive PPE provides protection, it typically limits moisture permeability and severely hinders the sweat evaporation process, resulting in greater heat stress on the personnel. Herein, a zinc-poly(vinyl alcohol) (Zn-PVA) composite film is fabricated by embedding a super-hygroscopic zinc-ethanolamine complex (Zn-complex) in the PVA matrix. By attaching the Zn-PVA composite film, the relative humidity (RH) inside the protective suit decreases from 91.0% to 48.2%. The reduced RH level, in turn, enhances evaporative cooling, hence bringing down the heat index from 64.6 to 40.0 °C at an air temperature of 35 °C, remarkably lowering the likelihood of heat stroke. The American Society for Testing and Materials tests conducted on a sweating manikin have also proven that the Zn-PVA composite films can significantly reduce the evaporative resistance of the protective suit by 90%. The low material cost, facile fabrication process, and reusability allow the Zn-PVA composition films to be readily available for healthcare workers worldwide. This application can be further extended to other occupations that are facing severe thermal discomfort and heat stress.
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Affiliation(s)
- Jiachen Yang
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Xueping Zhang
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - J Justin Koh
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Rensheng Deng
- Home Team Science and Technology Agency, 1 Stars Avenue, Singapore, 138507, Singapore
| | - Saravana Kumarasamy
- Home Team Science and Technology Agency, 1 Stars Avenue, Singapore, 138507, Singapore
| | - Yuan Xing Xu
- Home Team Science and Technology Agency, 1 Stars Avenue, Singapore, 138507, Singapore
| | - Hao Qu
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Songlin Zhang
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Yaoxin Zhang
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Swee Ching Tan
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
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7
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Jin P, Jiang R, Chen Q, Fan J, Zheng R. Design and evaluation of multifunctional protective clothing for tunnel workers. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2022; 29:484-493. [PMID: 35322756 DOI: 10.1080/10803548.2022.2055887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
By examining the requirements of tunnel workers, a multifunctional tunnel protective clothing was proposed in this study. The traditional tunnel protective clothing was redesigned from the perspective of improving clothing structure and fabric. A safe and protective clothing system, incorporating a harmful gas detection module, position monitoring module and data transmission module, was developed. Objective evaluation tests were carried out to verify the effectiveness of the proposed protective clothing. During the medium-intensity exercise phase, the average skin temperature and humidity of the participants who wore the new protective clothing were 1.0725 °C and 2.6% lower, respectively, than those who wore the conventional protective clothing (P<0.05). Furthermore, the new protective clothing system exhibited a highly sensitive and complete feedback mechanism. The positioning error could be controlled within ±10 cm, when the horizontal spacing distance of the base station was set to 200 m.
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Affiliation(s)
- Peng Jin
- College of Fashion and Design, Donghua University, Changning District, Shanghai 200051, China
| | - Runtian Jiang
- School of design, Jiangnan University, Binhu District, Wuxi 214122, China
| | - Qing Chen
- Shanghai International Fashion Innovation Centre, Donghua University, Changning District, Shanghai 200051, China
| | - Jintu Fan
- Shanghai International Fashion Innovation Centre, Donghua University, Changning District, Shanghai 200051, China.,Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Rong Zheng
- Shanghai International Fashion Innovation Centre, Donghua University, Changning District, Shanghai 200051, China
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8
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Saidi A, Gauvin C, Ladhari S, Nguyen-Tri P. Advanced Functional Materials for Intelligent Thermoregulation in Personal Protective Equipment. Polymers (Basel) 2021; 13:3711. [PMID: 34771268 PMCID: PMC8587695 DOI: 10.3390/polym13213711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 11/17/2022] Open
Abstract
The exposure to extreme temperatures in workplaces involves physical hazards for workers. A poorly acclimated worker may have lower performance and vigilance and therefore may be more exposed to accidents and injuries. Due to the incompatibility of the existing standards implemented in some workplaces and the lack of thermoregulation in many types of protective equipment that are commonly fabricated using various types of polymeric materials, thermal stress remains one of the most frequent physical hazards in many work sectors. However, many of these problems can be overcome with the use of smart textile technologies that enable intelligent thermoregulation in personal protective equipment. Being based on conductive and functional polymeric materials, smart textiles can detect many external stimuli and react to them. Interconnected sensors and actuators that interact and react to existing risks can provide the wearer with increased safety, protection, and comfort. Thus, the skills of smart protective equipment can contribute to the reduction of errors and the number and severity of accidents in the workplace and thus promote improved performance, efficiency, and productivity. This review provides an overview and opinions of authors on the current state of knowledge on these types of technologies by reviewing and discussing the state of the art of commercially available systems and the advances made in previous research works.
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Affiliation(s)
- Alireza Saidi
- Department of Chemistry, Biochemistry and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
- Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada;
- Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail (IRSST), 505 Boulevard de Maisonneuve Ouest, Montréal, QC H3A 3C2, Canada;
| | - Chantal Gauvin
- Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail (IRSST), 505 Boulevard de Maisonneuve Ouest, Montréal, QC H3A 3C2, Canada;
| | - Safa Ladhari
- Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada;
| | - Phuong Nguyen-Tri
- Department of Chemistry, Biochemistry and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
- Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada;
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9
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Roossien CC, Hodselmans AP, Heus R, Reneman MF, Verkerke GJ. Evaluation of a Wearable Non-Invasive Thermometer for Monitoring Ear Canal Temperature during Physically Demanding (Outdoor) Work. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18094896. [PMID: 34064464 PMCID: PMC8125248 DOI: 10.3390/ijerph18094896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/28/2021] [Accepted: 04/30/2021] [Indexed: 01/07/2023]
Abstract
Aimed at preventing heat strain, health problems, and absenteeism among workers with physically demanding occupations, a continuous, accurate, non-invasive measuring system may help such workers monitor their body (core) temperature. The aim of this study is to evaluate the accuracy and explore the usability of the wearable non-invasive Cosinuss° °Temp thermometer. Ear canal temperature was monitored in 49 workers in real-life working conditions. After individual correction, the results of the laboratory and field study revealed high correlations compared to ear canal infrared thermometry for hospital use. After performance of the real-life working tasks, this correlation was found to be moderate. It was also observed that the ambient environmental outdoor conditions and personal protective clothing influenced the accuracy and resulted in unrealistic ear canal temperature outliers. It was found that the Cosinuss° °Temp thermometer did not result in significant interference during work. Therefore, it was concluded that, without a correction factor, the Cosinuss° °Temp thermometer is inaccurate. Nevertheless, with a correction factor, the reliability of this wearable ear canal thermometer was confirmed at rest, but not in outdoor working conditions or while wearing a helmet or hearing protection equipment.
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Affiliation(s)
- Charlotte Christina Roossien
- Department of Rehabilitation, University of Groningen, University Medical Center Groningen, Medicine, 9713 GZ Groningen, The Netherlands; (M.F.R.); (G.J.V.)
- Correspondence:
| | - Audy Paul Hodselmans
- Center for Applied Research and Innovation in Health Care and in Nursing, Hanze University of Applied Sciences, 9747 AS Groningen, The Netherlands;
| | - Ronald Heus
- Institute for Safety (IFV), Knowledge Center Occupational Safety, 6816 RW Arnhem, The Netherlands;
| | - Michiel Felix Reneman
- Department of Rehabilitation, University of Groningen, University Medical Center Groningen, Medicine, 9713 GZ Groningen, The Netherlands; (M.F.R.); (G.J.V.)
| | - Gijsbertus Jacob Verkerke
- Department of Rehabilitation, University of Groningen, University Medical Center Groningen, Medicine, 9713 GZ Groningen, The Netherlands; (M.F.R.); (G.J.V.)
- Department of Biomedical Engineering, University of Twente, 7522 NB Enschede, The Netherlands
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10
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Wang F, Ke Y, Udayraj, Yang B, Xu P, Noor N. Effect of cooling strategies on overall performance of a hybrid personal cooling system incorporated with phase change materials (PCMs) and electric fans. J Therm Biol 2020; 92:102655. [PMID: 32888559 DOI: 10.1016/j.jtherbio.2020.102655] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/17/2020] [Accepted: 06/19/2020] [Indexed: 10/23/2022]
Abstract
The effect of four cooling strategies on cooling performance of a hybrid personal cooling system (HPCS) incorporated with phase change materials (PCMs) and electric fans in a hot environment (i.e., Tair = 36 ± 0.5 °C, RH = 59 ± 5%) was investigated. Twelve healthy young male participants underwent four 90-min trials comprising 70 min walking and 20 min resting periods. Cooling strategies adopted in this work were CON (control), PCM-control (PCMs were removed at the end of exercise), Fan-control (fans were switched OFF during the initial 20 min) and PCM&Fan-control (fans were turned ON after 20 min exercising and PCMs were removed after the 70-min exercise). Results demonstrated that the control of electric fans could suppress the mean skin temperature rise to 34.0 °C by over 15 min and also cut down the energy consumption of the HPCS from 15.6 W h to 12.1 W h over the entire 90-min trials. Thus, it is recommended that fans should be turned off at the beginning of hot exposure and switched on once participants felt warm. Our findings also showed that the removal of fully melted PCM packs from the HPCS could enhance the evaporative cooling effect brought about by air circulation. The removal of melted PCMs significantly reduced the physical load by 37.3% and ratings of perceived exertion (RPE) were decreased by 3.5-4.2 RPE units. This could also help quickly restore the PCM energy for future usage. In summary, cooling strategies demonstrated in this work could improve HPCS's overall cooling performance on workers while working in the studied hot environment.
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Affiliation(s)
- Faming Wang
- School of Architecture and Art, Central South University, Changsha, China.
| | - Ying Ke
- Jiangsu Non-material Culture Heritage Research Base, Jiangnan University, Wuxi, China
| | - Udayraj
- Department of Mechanical Engineering, Indian Institute of Technology Bhilai, Chhattisgarh, 492015, India
| | - Bin Yang
- School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China
| | - Pengjun Xu
- School of Design Art, Xiamen University of Technology, Xiamen, China
| | - Nuruzzaman Noor
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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Golbabaei F, Heydari A, Moradi G, Dehghan H, Moradi A, Habibi P. The effect of cooling vests on physiological and perceptual responses: a systematic review. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2020; 28:223-255. [PMID: 32164499 DOI: 10.1080/10803548.2020.1741251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Humans in hot environments are exposed to health risks and thermal discomfort which seriously affect their physical, physiological and mental workload. This study aimed to assess the effects of using cooling vests (CVs) on physiological and perceptual responses in the workplace. Three main databases were searched using subject headings and appropriate Mesh terms. The article has been written according to the preferred reporting items for systematic reviews checklist. A total of 23,837 studies were identified for screening and 63 studies were eligible for data extraction. A statistically significant difference was observed in body temperature among hybrid cooling garments (HBCGs), phase-change materials (PCMs) and air-cooled garments (ACGs) at 31.56-37 °C (60% relative humidity), evaporative cooling garments at 25.8-28.1 °C and liquid cooling garments at 35 °C (49% relative humidity) compared to without CVs (p < 0.001). HBCGs (PCMs and ACGs) are effective means in hot, moderate, humid or dry environments.
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Affiliation(s)
- Farideh Golbabaei
- Department of Occupational Health Engineering, Tehran University of Medical Sciences, Iran
| | - Ahad Heydari
- Department of Health in Disaster and Emergencies, Tehran University of Medical Sciences, Iran
| | - Gholamreza Moradi
- Department of Occupational Health Engineering, Tabriz University of Medical Sciences, Iran
| | - Habibollah Dehghan
- Department of Occupational Health Engineering, Isfahan University of Medical Sciences, Iran
| | - Amirhossein Moradi
- Faculty of Engineering and Applied Science, Memorial University of Newfoundland, Canada
| | - Peymaneh Habibi
- Department of Occupational Health Engineering, Tehran University of Medical Sciences, Iran
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12
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Zheng Q, Ke Y, Wang H. Design and evaluation of cooling workwear for miners in hot underground mines using PCMs with different temperatures. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2020; 28:118-128. [PMID: 32276569 DOI: 10.1080/10803548.2020.1730618] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Cooling workwear using phase change materials (PCMs) was designed for miners in hot underground mines. A new arrangement of PCM packs was introduced that used 15 °C PCMs as the inner layer and 23 °C PCMs as the outer layer (15&23). Its performance was investigated using thermal manikin and human subject tests by comparison with clothing without PCMs (CON), with 15 °C PCMs (15&15) and with melted PCMs (mPCM) in a climate chamber (30 °C, 80% relative humidity). The PCM cooling workwear significantly increased the manikin heat loss, attenuated the rise of skin temperatures and improved thermal sensation and comfort. The cooling duration was extended in 15&23 as compared with 15&15. The added PCMs did not affect the perceptual exertion and body mobility. In summary, cooling workwear using PCMs with different temperatures can be an effective option for miners' personal cooling in a hot and humid environment.
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Affiliation(s)
- Qing Zheng
- Jiangsu Non-material Culture Heritage Research Base, Jiangnan University, China
| | - Ying Ke
- Jiangsu Non-material Culture Heritage Research Base, Jiangnan University, China.,Present address: Key Laboratory of Clothing Design and Technology, Ministry of Education, Donghua University, China
| | - Hongfu Wang
- Jiangsu Non-material Culture Heritage Research Base, Jiangnan University, China
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13
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Noor N, Mutalik S, Younas MW, Chan CY, Thakur S, Wang F, Yao MZ, Mou Q, Leung PHM. Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites. Polymers (Basel) 2019; 11:E2000. [PMID: 31816952 PMCID: PMC6961056 DOI: 10.3390/polym11122000] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/20/2019] [Accepted: 11/29/2019] [Indexed: 01/01/2023] Open
Abstract
Silver nanoparticle (AgNP) and AgNP/reduced graphene oxide (rGO) nanocomposite impregnated medical grade polyviscose textile pads were formed using a facile, surface-mediated wet chemical solution-dipping process, without further annealing. Surfaces were sequentially treated in situ with a sodium borohydride (NaBH4) reducing agent, prior to formation, deposition, and fixation of Ag nanostructures and/or rGO nanosheets throughout porous non-woven (i.e., randomly interwoven) fibrous scaffolds. There was no need for stabilising agent use. The surface morphology of the treated fabrics and the reaction mechanism were characterised by Fourier transform infrared (FTIR) spectra, ultraviolet-visible (UV-Vis) absorption spectra, X-ray diffraction (XRD), Raman spectroscopy, dynamic light scattering (DLS) energy-dispersive X-ray analysis (EDS), and scanning electron microscopic (SEM). XRD and EDS confirmed the presence of pure-phase metallic silver. Variation of reducing agent concentration allowed control over characteristic plasmon absorption of AgNP while SEM imaging, EDS, and DLS confirmed the presence of and dispersion of Ag particles, with smaller agglomerates existing with concurrent rGO use, which also coincided with enhanced AgNP loading. The composites demonstrated potent antimicrobial activity against the clinically relevant gram-negative Escherichia coli (a key causative bacterial agent of healthcare-associated infections; HAIs). The best antibacterial rate achieved for treated substrates was 100% with only a slight decrease (to 90.1%) after 12 equivalent laundering cycles of standard washing. Investigation of silver ion release behaviours through inductively coupled plasmon optical emission spectroscopy (ICP-OES) and laundering durability tests showed that AgNP adhesion was aided by the presence of the rGO host matrix allowing for robust immobilisation of silver nanostructures with relatively high stability, which offered a rapid, convenient, scalable route to conformal NP-decorated and nanocomposite soft matter coatings.
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Affiliation(s)
- Nuruzzaman Noor
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Suhas Mutalik
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Muhammad Waseem Younas
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Cheuk Ying Chan
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Suman Thakur
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Faming Wang
- Materials Synthesis and Processing Lab, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (S.M.); (M.W.Y.); (C.Y.C.); (S.T.); (F.W.)
| | - Mian Zhi Yao
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Lee Shau Kee Building, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (M.Z.Y.); (Q.M.); (P.H.-m.L.)
| | - Qianqian Mou
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Lee Shau Kee Building, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (M.Z.Y.); (Q.M.); (P.H.-m.L.)
| | - Polly Hang-mei Leung
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Lee Shau Kee Building, Hung Hom, Kowloon, Hong Kong SAR 999077, China; (M.Z.Y.); (Q.M.); (P.H.-m.L.)
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