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Title: Development of self-healing films to improve durability of VIPs by in-situ remediation of film defects

Abstract

The integrity of the VIP barrier film or envelope is a critical for maintaining the ultra-low thermal conductivity of VIPs. Here, the concept of a self-healing barrier film is described and demonstrated. The self-healing concept is based on an addition reaction between two chemicals, without the need for any external stimuli. The chemicals are incorporated as coatings in a multi-layered film and are initially kept separate with a partition layer. In case of damage, the chemicals would mix, react and heal the damage. Tests of small-scale film samples in a custom vacuum pump apparatus by puncturing the samples demonstrated the proof-of-concept. The tests indicated that the chemicals reacted and healed the puncture immediately to maintain the system vacuum. The intact and punctured self-healing films showed near-identical behaviour, while a control sample allowed the pressure to rise to atmospheric levels on puncturing. Development of films with coated chemicals using tape casting and slot die coating methods is also described. These are low-cost and mature technologies, which are commonly used by various industries. The proposed chemicals are low-cost, commercially available materials. Thus, the self-healing technology is expected to be inexpensive and scalable.


Citation Formats

Biswas, Kaushik, Saito, Tomonori, Cao, Pengfei, Ghezawi, Natasha, Grady, Kelsey, Wood III, David, Ruther, Rose, Gilmer, Dustin B., and Gardner, Kenisha. Development of self-healing films to improve durability of VIPs by in-situ remediation of film defects. United States: N. p., 2019. Web.
Biswas, Kaushik, Saito, Tomonori, Cao, Pengfei, Ghezawi, Natasha, Grady, Kelsey, Wood III, David, Ruther, Rose, Gilmer, Dustin B., & Gardner, Kenisha. Development of self-healing films to improve durability of VIPs by in-situ remediation of film defects. United States.
Biswas, Kaushik, Saito, Tomonori, Cao, Pengfei, Ghezawi, Natasha, Grady, Kelsey, Wood III, David, Ruther, Rose, Gilmer, Dustin B., and Gardner, Kenisha. Sun . "Development of self-healing films to improve durability of VIPs by in-situ remediation of film defects". United States. https://www.osti.gov/servlets/purl/1566962.
@article{osti_1566962,
title = {Development of self-healing films to improve durability of VIPs by in-situ remediation of film defects},
author = {Biswas, Kaushik and Saito, Tomonori and Cao, Pengfei and Ghezawi, Natasha and Grady, Kelsey and Wood III, David and Ruther, Rose and Gilmer, Dustin B. and Gardner, Kenisha},
abstractNote = {The integrity of the VIP barrier film or envelope is a critical for maintaining the ultra-low thermal conductivity of VIPs. Here, the concept of a self-healing barrier film is described and demonstrated. The self-healing concept is based on an addition reaction between two chemicals, without the need for any external stimuli. The chemicals are incorporated as coatings in a multi-layered film and are initially kept separate with a partition layer. In case of damage, the chemicals would mix, react and heal the damage. Tests of small-scale film samples in a custom vacuum pump apparatus by puncturing the samples demonstrated the proof-of-concept. The tests indicated that the chemicals reacted and healed the puncture immediately to maintain the system vacuum. The intact and punctured self-healing films showed near-identical behaviour, while a control sample allowed the pressure to rise to atmospheric levels on puncturing. Development of films with coated chemicals using tape casting and slot die coating methods is also described. These are low-cost and mature technologies, which are commonly used by various industries. The proposed chemicals are low-cost, commercially available materials. Thus, the self-healing technology is expected to be inexpensive and scalable.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}

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