Relationship between the Omniphobic Properties and the Swelling Degree of SLIPS Coatings Based on Polymer Gel Thin Films

Kazaryan, Polina S.; Kharitonova, Elena P.; Makaev, S. V.; Гулин, А. А.; Kondratenko, Mikhail S.

doi:10.1134/s0012501621030027

Cited by 2 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have recently demonstrated the possibility of using supercritical CO 2 for one-stage thin organogel SLIPS synthesis. 48,51 It has been shown that the pinning force of the test droplets in the transition from dry to swollen fluorinated polymer matrix is well described by the de Gennes theory of diluted defects. 52 This work was inspired by the result of Zhang et al, 33 who observed a nonmonotonic change in the sliding angle with varying the number of brushes.…”

Section: Introductionmentioning

confidence: 99%

“…Deposition from supercritical and subcritical CO 2 -based solutions expands the applicability of slippery polymer coatings to textiles, electrodes, and other substrates with complex morphology. We have recently demonstrated the possibility of using supercritical CO 2 for one-stage thin organogel SLIPS synthesis. , It has been shown that the pinning force of the test droplets in the transition from dry to swollen fluorinated polymer matrix is well described by the de Gennes theory of diluted defects …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dependence of Slippery and Elastic Properties of Thin Polymer Films on the Grafted Flexible Sidechain Amount

Kazaryan,

Gritsevich,

Gallyamov

et al. 2023

Langmuir

View full text Add to dashboard Cite

In modern life, people face a wide number of sticky problems when adhesion is highly undesirable: water and dirt stick to clothes, useful materials stick to the walls of their containers and cannot be fully used, water sticking and freezing on airplane wings affects handling and can be dangerous, biological liquids can stick and form clots inside medical devices threatening patients' lives, etc. Slippery liquid-infused porous surfaces (SLIPSs) with pressure stable omniphobicity could help to solve these issues. Lubricant depletion from porous surface and subsequent degradation of omniphobic properties is the major problem for SLIPS. It could be resolved by attaching flexible, liquid-like sidechains to the polymer matrix. Understanding the relationship between the structure of such polymer films and wetting effects is therefore of great importance. The present work is devoted to the study of droplet pinning on crosslinked polydimethylsiloxane (PDMS) polymer films with varied amounts of attached flexible PDMS sidechains and clarification of the relationship between slippery and viscoelastic properties of the films. An one-stage approach to the synthesis of such slippery coatings on smooth and porous substrates in "eco-friendly" pressurized CO 2 solutions is proposed. Pinning force and Young's modulus (E) of the films on silicon substrates with variation of the grafted sidechains amount (x) are measured. The nonmonotonic dependence of the pinning force on the amount of sidechains is obtained: the pinning force decreases at small x values (region I) and starts to increase at higher x (region II). The effects of the grafted sidechains amount, as well as matrix softening, are discussed for each case. It is demonstrated that the proposed method of film synthesis allows one to obtain thin, uniform coatings on fabrics without gluing the fibers. Such coatings with an optimal amount of PDMS sidechains demonstrate decreased sliding angles for droplets of water and aqueous alcohol solutions, as compared to PDMS coatings without grafted sidechains. The proposed technique may be of interest for deposition of coatings on porous surfaces having a complex morphology, such as textiles, aerogels, porous electrodes, etc.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dependence of Slippery and Elastic Properties of Thin Polymer Films on the Grafted Flexible Sidechain Amount

Kazaryan,

Gritsevich,

Gallyamov

et al. 2023

Langmuir

View full text Add to dashboard Cite

show abstract

“…We have recently demonstrated the possibility of using SC CO 2 for one-stage thin organogel SLIPS synthesis . The experimental dependence of the pinning force on the gel swelling degree for such coatings has been obtained . However, there is a change in the polymer matrix morphology with an increase in the lubricant content during the one-step synthesis, which could provide additional contribution to the adhesion of the droplet.…”

Section: Introductionmentioning

confidence: 99%

Study of the Droplet Pinning Force in the Transition from Dry to Liquid-Infused Thin Polymer Films

2022

View full text Add to dashboard Cite

The change in the pinning force during the transition from dry to oil-impregnated thin polymer films is studied for droplets of water and hexadecane. A careful variation of the oil amount in the films is performed by means of supercritical impregnation. The film thickness dependence on the oil content is measured using ellipsometry and compared to gel swelling theory estimates. Depending on the oil content, two cases of pinning force behavior have been identified. For each case, the factors that determine the pinning force are discussed. The pinning force in the transition from dry to equilibrium swollen gel films is well approximated by the Joanny and de Gennes hysteresis model of dilute defects.

show abstract

Relationship between the Omniphobic Properties and the Swelling Degree of SLIPS Coatings Based on Polymer Gel Thin Films

Cited by 2 publications

References 12 publications

Dependence of Slippery and Elastic Properties of Thin Polymer Films on the Grafted Flexible Sidechain Amount

Dependence of Slippery and Elastic Properties of Thin Polymer Films on the Grafted Flexible Sidechain Amount

Study of the Droplet Pinning Force in the Transition from Dry to Liquid-Infused Thin Polymer Films

Contact Info

Product

Resources

About