Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation
The rational use of efficient thermal insulation materials is one of the effective strategies for energy management. However, existing thermal insulation materials often exhibit poor stability, suboptimal thermal insulation performance, and weak mechanical properties in some extreme environments. He...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-02-01
|
| Series: | Small Structures |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/sstr.202400439 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832542156844171264 |
|---|---|
| author | Renhao Li Yan Bao Ruyue Guo Lu Gao Wenbo Zhang Chao Liu Haihang Zhao |
| author_facet | Renhao Li Yan Bao Ruyue Guo Lu Gao Wenbo Zhang Chao Liu Haihang Zhao |
| author_sort | Renhao Li |
| collection | DOAJ |
| description | The rational use of efficient thermal insulation materials is one of the effective strategies for energy management. However, existing thermal insulation materials often exhibit poor stability, suboptimal thermal insulation performance, and weak mechanical properties in some extreme environments. Herein, this work develops an easy and scalable strategy for creating hollow polyimide (PI) nanofibers through coaxial electrospinning and high‐temperature template removal technology, in which the internal hollow structure is precisely controlled. A large amount of air is filled in the hollow structure within the nanofibers and the voids between the nanofibers, giving PI nanofibers low density (23.3 mg cm−3) and high porosity (98.2%). This characteristic also effectively suppresses the heat transfer of PI nanofibers, resulting in an ultralow thermal conductivity (20.6 mW m−1 K−1). Meanwhile, PI nanofibers also exhibit excellent mechanical properties with a stress and strain of 5.52 MPa and 62.7%, respectively. In addition, compared to other commercial thermal insulation materials, PI nanofibers demonstrate superior extreme temperature tolerance (from −196 to 350 °C) and flame retardancy (limit oxygen index of 30.8%). Given these advantages, this work provides inspiration for the structural design of nanofiber materials with efficient thermal insulation. |
| format | Article |
| id | doaj-art-2b2a1a9195f8475ea5a604230a748857 |
| institution | Kabale University |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-2b2a1a9195f8475ea5a604230a7488572025-02-04T08:10:21ZengWiley-VCHSmall Structures2688-40622025-02-0162n/an/a10.1002/sstr.202400439Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal InsulationRenhao Li0Yan Bao1Ruyue Guo2Lu Gao3Wenbo Zhang4Chao Liu5Haihang Zhao6College of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaCollege of Bioresources Chemical and Materials Engineering (College of Flexible Electronics) Shaanxi University of Science and Technology Xi'an 710021 ChinaThe rational use of efficient thermal insulation materials is one of the effective strategies for energy management. However, existing thermal insulation materials often exhibit poor stability, suboptimal thermal insulation performance, and weak mechanical properties in some extreme environments. Herein, this work develops an easy and scalable strategy for creating hollow polyimide (PI) nanofibers through coaxial electrospinning and high‐temperature template removal technology, in which the internal hollow structure is precisely controlled. A large amount of air is filled in the hollow structure within the nanofibers and the voids between the nanofibers, giving PI nanofibers low density (23.3 mg cm−3) and high porosity (98.2%). This characteristic also effectively suppresses the heat transfer of PI nanofibers, resulting in an ultralow thermal conductivity (20.6 mW m−1 K−1). Meanwhile, PI nanofibers also exhibit excellent mechanical properties with a stress and strain of 5.52 MPa and 62.7%, respectively. In addition, compared to other commercial thermal insulation materials, PI nanofibers demonstrate superior extreme temperature tolerance (from −196 to 350 °C) and flame retardancy (limit oxygen index of 30.8%). Given these advantages, this work provides inspiration for the structural design of nanofiber materials with efficient thermal insulation.https://doi.org/10.1002/sstr.202400439electrospinningextreme conditionsnanofiberspolyimidesthermal insulations |
| spellingShingle | Renhao Li Yan Bao Ruyue Guo Lu Gao Wenbo Zhang Chao Liu Haihang Zhao Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation Small Structures electrospinning extreme conditions nanofibers polyimides thermal insulations |
| title | Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation |
| title_full | Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation |
| title_fullStr | Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation |
| title_full_unstemmed | Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation |
| title_short | Hollow Structured‐Controllable Polyimide Nanofibers with Extreme Conditions Tolerance for Efficient Thermal Insulation |
| title_sort | hollow structured controllable polyimide nanofibers with extreme conditions tolerance for efficient thermal insulation |
| topic | electrospinning extreme conditions nanofibers polyimides thermal insulations |
| url | https://doi.org/10.1002/sstr.202400439 |
| work_keys_str_mv | AT renhaoli hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT yanbao hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT ruyueguo hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT lugao hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT wenbozhang hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT chaoliu hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation AT haihangzhao hollowstructuredcontrollablepolyimidenanofiberswithextremeconditionstoleranceforefficientthermalinsulation |