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Iqbal MI, Lin K, Sun F, Chen S, Pan A, Lee HH, Kan CW, Lin CSK, Tso CY. Radiative Cooling Nanofabric for Personal Thermal Management. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23577-23587. [PMID: 35562190 DOI: 10.1021/acsami.2c05115] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A wearable textile that is engineered to reflect incoming sunlight and allow the transmission of mid-infrared radiation simultaneously would have a great impact on the human body's thermal regulation in an outdoor environment. However, developing such a textile is a tough challenge. Using nanoparticle-doped polymer (zinc oxide and polyethylene) materials and electrospinning technology, we have developed a nanofabric with the desired optical properties and good applicability. The nanofabric offers a cool fibrous structure with outstanding solar reflectivity (91%) and mid-infrared transmissivity (81%). In an outdoor field test under exposure of direct sunlight, the nanofabric was demonstrated to reduce the simulated skin temperature by 9 °C when compared to skin covered by a cotton textile. A heat-transfer model is also established to numerically assess the cooling performance of the nanofabric as a function of various climate factors, including solar intensity, ambient air temperature, atmospheric emission, wind speed, and parasitic heat loss rate. The results indicate that the nanofabric can completely release the human body from unwanted heat stress in most conditions, providing an additional cooling effect as well as demonstrating worldwide feasibility. Even in some extreme conditions, the nanofabric can also reduce the human body's cooling demand compared with traditional cotton textile, proving this material as a feasible solution for better thermoregulation of the human body. The facile fabrication of such textiles paves the way for the mass adoption of energy-free personal cooling technology in daily life, which meets the growing demand for healthcare, climate change, and sustainability.
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Affiliation(s)
- Mohammad Irfan Iqbal
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Kaixin Lin
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Fengxin Sun
- Key Laboratory of Eco-textiles of Ministry of Education and Laboratory of Soft Fibrous Materials, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
| | - Siru Chen
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Aiqiang Pan
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Hau Him Lee
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Chi-Wai Kan
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
| | - Chi Yan Tso
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong
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El‐Morsy MA. On investigations of refractive indices and birefringence of fiber using duplicate and non‐duplicate micro‐interferograms of double refracting interferometer. Microsc Res Tech 2019; 82:596-614. [DOI: 10.1002/jemt.23207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/21/2018] [Accepted: 12/08/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Mohamed A. El‐Morsy
- Physics Department, Plasma Technology and Material Science UnitPrince Sattam bin Abdulaziz University, College of Science and Humanitarian Studies Al‐Kharj Saudi Arabia
- University of DamiettaPhysics Department, Faculty of Science New Damietta Egypt
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Cai L, Song AY, Li W, Hsu PC, Lin D, Catrysse PB, Liu Y, Peng Y, Chen J, Wang H, Xu J, Yang A, Fan S, Cui Y. Spectrally Selective Nanocomposite Textile for Outdoor Personal Cooling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802152. [PMID: 30015999 DOI: 10.1002/adma.201802152] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/10/2018] [Indexed: 05/27/2023]
Abstract
Outdoor heat stress poses a serious public health threat and curtails industrial labor supply and productivity, thus adversely impacting the wellness and economy of the entire society. With climate change, there will be more intense and frequent heat waves that further present a grand challenge for sustainability. However, an efficient and economical method that can provide localized outdoor cooling of the human body without intensive energy input is lacking. Here, a novel spectrally selective nanocomposite textile for radiative outdoor cooling using zinc oxide nanoparticle-embedded polyethylene is demonstrated. By reflecting more than 90% solar irradiance and selectively transmitting out human body thermal radiation, this textile can enable simulated skin to avoid overheating by 5-13 °C compared to normal textile like cotton under peak daylight condition. Owing to its superior passive cooling capability and compatibility with large-scale production, this radiative outdoor cooling textile is promising to widely benefit the sustainability of society in many aspects spanning from health to economy.
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Affiliation(s)
- Lili Cai
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Alex Y Song
- E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Wei Li
- E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Po-Chun Hsu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Dingchang Lin
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Peter B Catrysse
- E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Yayuan Liu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Yucan Peng
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Jun Chen
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Hongxia Wang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Jinwei Xu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Ankun Yang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Shanhui Fan
- E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Yi Cui
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
- SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
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Ali AM, Felemban N, El-Bakary MA. Characterization of the 3Dimension optical, geometrical, and mechanical profiles of iPP fiber with necking deformation. Microsc Res Tech 2018; 81:755-760. [PMID: 29633458 DOI: 10.1002/jemt.23033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/27/2018] [Accepted: 03/25/2018] [Indexed: 11/06/2022]
Abstract
We present a method for evaluating the 3D refractive indices and 3D true stress and/or 3D true strain profiles of "isotactic polypropylene iPP" fibers during necking deformation. Observing the changes in geometrical shape during the deformation process is necessary to understand the mechanical performance of iPP fibers. 3D geometric shape profile and actual stress and strain profiles were measured for iPP fibers during the propagation of neck deformation. These measurements were performed with the aid of an in-situ opto- mechanical device to dynamically characterize different properties of fibers at different strain rates. A software image analysis program was used to calculate the 3D opto-mechanical properties of iPP fibers. The obtained results show that the used dynamic stretching device can be easily used to monitor the deformation process with high accuracy. The effective stress and strain can be determined from the filaments profile. For illustration microinterferograms are given.
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Affiliation(s)
- A M Ali
- Department of Physics, Faculty of Science, Umm Al- Qura University, KSA.,Physics Department, Faculty of Science, Mansoura University, Egypt
| | - Nuha Felemban
- Department of Physics, Faculty of Science, Umm Al- Qura University, KSA
| | - M A El-Bakary
- Physics Department, Faculty of Science, Mansoura University, Egypt
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Yassien K, Bakary ME. Opto-Mechanical Properties of PTFE Fibres Using Phase Shifting Interferometry. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/opj.2014.46016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sokkar TZN, El-Bakary MA, Ali AM. The influence of mechanical cold drawing and drawing velocity on the molecular structure of isotactic polypropylene fiber. J Appl Polym Sci 2012. [DOI: 10.1002/app.37559] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hamza AA, Sokkar TZN, El-Farahaty KA, Raslan MI. On-line opto-viscoelastic analysis of polypropylene fibres using multiple-beam Fizeau fringes in transmission and a modified creep device. POLYM INT 2010. [DOI: 10.1002/pi.2837] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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El-Dessouky HM, Mahmoudi MR, Lawrence CA, Lewis EL, Voice AM, Ward IM. On the physical behavior of isotactic polypropylene fibers extruded at different draw-down ratios: II. Structure and properties. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21533] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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El-Dessouky HM, Mahmoudi MR, Lawrence CA, Yassien KM, Sokkar TZ, Hamza AA. On the physical behavior of isotactic polypropylene fibers extruded at different draw-down ratios. I. Optical properties and cold-drawing. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21449] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fouda IM, EL-Farahaty KA, Seisa EA. Interferometric study of creep deformation and some structural properties of polypropylene fiber at three different temperatures. J Appl Polym Sci 2008. [DOI: 10.1002/app.28714] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hamza AA, Sokkar TZN, EL-Bakary MA, Ali AM, El-Morsy MA. Geometrical and Optical Properties of Irregular Fibers as a Function of Draw Ratio. INT J POLYM MATER PO 2008. [DOI: 10.1080/00914030701555619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- A. A. Hamza
- a British University , El Sherouk City, Egypt
| | - T. Z. N. Sokkar
- b Physics Department , Faculty of Science, Mansoura University , Mansoura, Egypt
| | - M. A. EL-Bakary
- b Physics Department , Faculty of Science, Mansoura University , Mansoura, Egypt
| | - A. M. Ali
- b Physics Department , Faculty of Science, Mansoura University , Mansoura, Egypt
| | - M. A. El-Morsy
- c Physics Department , Faculty of Science Demietta, Mansoura University , New Demietta, Egypt
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El-Dessouky HM. Birefringent characterization of necking phenomenon along cold-drawn polypropylene fibers. I. Offline drawing. J Appl Polym Sci 2007. [DOI: 10.1002/app.26101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hamza AA, Sokkar TZN, El-Bakary MA, Belal AE, Yassien KM. Determination of the Spectral Dispersion Curves of Highly Oriented Fibers Using Multiple-Beam Microinterferometry. INT J POLYM MATER PO 2006. [DOI: 10.1080/00914030500257631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Canfield BK, Kwiatkowski CS, Kuzyk MG. Direct deflection method for determining refractive-index profiles of polymer optical fiber preforms. APPLIED OPTICS 2002; 41:3404-3411. [PMID: 12074511 DOI: 10.1364/ao.41.003404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We present a method for determining the refractive-index profile of polymer optical fiber preforms through a direct-deflection measurement. The method is simple to use, compact, and has good resolution. The profile is obtained from the deflection data by numerically integrating the differential-ray equation for a radial refractive-index gradient. Corrections for topographical deviations are also discussed. Results for both graded-index and step-index fibers are presented.
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Affiliation(s)
- Brian K Canfield
- Washington State University, Department of Physics, Pullman 99164-2814, USA.
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El-Morsy MA, Yatagai T, Hamza A, Mabrouk MA, Sokkar TZN. Multiple-beam Fizeau fringe-pattern analysis using Fourier transform method for accurate measurement of fiber refractive index profile of polymer fiber. J Appl Polym Sci 2002. [DOI: 10.1002/app.10387] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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