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Tailor-Made White Photothermal Fabrics: A Bridge between Pragmatism and Aesthetic
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0002-0171-3569
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0003-3582-6075
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2023 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 35, no 41, article id 2209215Article in journal (Refereed) Published
Abstract [en]

Maintaining human thermal comfort in the cold outdoors is crucial for diverse outdoor activities, e.g., sports and recreation, healthcare, and special occupations. To date, advanced clothes are employed to collect solar energy as a heat source to stand cold climates, while their dull dark photothermal coating may hinder pragmatism in outdoor environments and visual sense considering fashion. Herein, tailor-made white webs with strong photothermal effect are proposed. With the embedding of cesium–tungsten bronze (CsxWO3) nanoparticles (NPs) as additive inside nylon nanofibers, these webs are capable of drawing both near-infrared (NIR) and ultraviolet (UV) light in sunlight for heating. Their exceptional photothermal conversion capability enables 2.5–10.5 °C greater warmth than that of a commercial sweatshirt of six times greater thickness under different climates. Remarkably, this smart fabric can increase its photothermal conversion efficiency in a wet state. It is optimal for fast sweat or water evaporation at human comfort temperature (38.5 °C) under sunlight, and its role in thermoregulation is equally important to avoid excess heat loss in wilderness survival. Obviously, this smart web with considerable merits of shape retention, softness, safety, breathability, washability, and on-demand coloration provides a revolutionary solution to realize energy-saving outdoor thermoregulation and simultaneously satisfy the needs of fashion and aesthetics.

Place, publisher, year, edition, pages
2023. Vol. 35, no 41, article id 2209215
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-218153DOI: 10.1002/adma.202209215ISI: 000991498000001PubMedID: 36972562Scopus ID: 2-s2.0-85159662384OAI: oai:DiVA.org:su-218153DiVA, id: diva2:1768463
Funder
EU, European Research Council, PARIS‐101043485Swedish Research Council, 2021‐05839Available from: 2023-06-15 Created: 2023-06-15 Last updated: 2024-01-03Bibliographically approved
In thesis
1. Processing 2D nanomaterials into inorganic-polymer composite films and fibers with well-defined properties
Open this publication in new window or tab >>Processing 2D nanomaterials into inorganic-polymer composite films and fibers with well-defined properties
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

2D materials such as graphene, graphene oxide (GO), reduced graphene oxide (rGO) and MXene, possess unique properties, e.g., high carrier mobilities, mechanical flexibility, good thermal conductivity, and high optical and UV adsorption. They are potentially applicable in the fields of electronics, optoelectronics, catalysts, energy storage facilities, sensors, solar cells, lithium batteries, and so on. Normally, weak interactions and irregular packing or stacking of 2D layers may adversely offset or weaken to some extent their 2D effects such as mechanical and electrical properties at a macroscale. In this regard, it is required to spatially organize 2D materials into macroscopic forms of a well-defined shape (e.g. fibers, films, or 3D structures) in a way that can simultaneously preserve favorable 2D properties and functions shown at the nanoscale, and facilitate their compatibility with the state-of-the-art industrial processes. In my thesis, different types of 2D materials, here GO, rGO and MXene together with polymers were rationally assembled into functional composite materials. The synergistic molecular crosslinking strategy was utilized and controlled in such composite materials for the sake of better performance. My thesis mainly involves four parts:

 

(1) Tough and strong GO composite films via a polycationitrile approach. The interface between GO nanosheets was reinforced via an intermolecular covalent crosslinking approach called “polycationitrile chemistry”. As a result, the mechanical performance of the as-prepared GO-based composite films was enhanced and maintained even at an extremely high relative humidity of 98%.

(2) rGO-poly(ionic liquid) (PIL) composite films with high mechanical performance. The rGO/PIL composite films were designed and fabricated, where the synergistic supramolecular interactions between PIL and rGO layer enable high electrical conductivity and favorable mechanical properties.

(3) Regenerated cellulose (RC)/MXene composite nanofibers for personal heating management. I harnessed a biodegradable RC-based fibrous matrix to bond with inorganic MXene nanoflakes via electrospinning method. Via hybridization, the as-formed RC/MXene nanofibers present a promotion of mechanical performance and photothermal conversion capability. As a personal heating cloth, it realizes energy-saving outdoor thermoregulatory.

(4) RC/MXene solar absorber for solar-driven interfacial water evaporation. The RC/MXene composite nanofibers integrate considerable merits of excellent mechanical performance, wettability, and fast steam generation rate. The RC/MXene solar absorber offers significant values for the practical application of solar-driven steam generation.

Place, publisher, year, edition, pages
Stockholm: Department of Materials and Environmental Chemistry, Stockholm University, 2023. p. 59
Keywords
2D materials, advanced composite materials, crosslinking chemistry, high mechanical performance, solar heating, personalized thermoregulation, solar-driven water evaporation
National Category
Materials Chemistry
Research subject
Materials Chemistry
Identifiers
urn:nbn:se:su:diva-218177 (URN)978-91-8014-398-1 (ISBN)978-91-8014-399-8 (ISBN)
Public defence
2023-09-13, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B and online via Zoom, public link is available at the department website, Stockholm, 14:30 (English)
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Supervisors
Available from: 2023-08-21 Created: 2023-06-16 Last updated: 2023-08-14Bibliographically approved

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Chang, JianZhang, MiaoYu, XiaowenPang, KangleiYuan, Jiayin

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