Critical cracking thickness of drying polymer films

Tomar, Bhawana Singh; Tirumkudulu, Mahesh S.

doi:10.1039/d3sm00253e

Soft Matter

2023

DOI: 10.1039/d3sm00253e

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Critical cracking thickness of drying polymer films

Bhawana Singh Tomar

Mahesh S. Tirumkudulu

Abstract: Polymer coatings are used for a number of applications such as for decorative purposes, to protect surfaces and as functional part of devices. The mechanical integrity of the coatings is...

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2024

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Suppression of cracking in drying colloidal suspensions with chain-like particles

Niu,

Zhao,

Zhang

et al. 2024

The Journal of Chemical Physics

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The prevention of drying-induced cracking is crucial in maintaining the mechanical integrity and functionality of colloidal deposits and coatings. Despite exploring various approaches, controlling drying-induced cracking remains a subject of great scientific interest and practical importance. By introducing chain-like particles composed of the same material and with comparable size into commonly used colloidal suspensions of spherical silica nanoparticles, we can significantly reduce the cracks formed in dried particle deposits and achieve a fivefold increase in the critical cracking thickness of colloidal silica coatings. The mechanism underlying the crack suppression is attributed to the increased porosity and pore sizes in dried particle deposits containing chain-like particle, which essentially leads to reduction in internal stresses developed during the drying process. Meanwhile, the nanoindentation measurements reveal that colloidal deposits with chain-like particles exhibit a smaller reduction in hardness compared to those reported using other cracking suppression approaches. This work demonstrates a promising technique for preparing colloidal coatings with enhanced crack resistance while maintaining desirable mechanical properties.

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Suppression of cracking in drying colloidal suspensions with chain-like particles

Niu,

Zhao,

Zhang

et al. 2024

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

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Critical cracking thickness of drying polymer films

Abstract: Polymer coatings are used for a number of applications such as for decorative purposes, to protect surfaces and as functional part of devices. The mechanical integrity of the coatings is...

Cited by 1 publication

References 35 publications

Suppression of cracking in drying colloidal suspensions with chain-like particles

Suppression of cracking in drying colloidal suspensions with chain-like particles

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