A fluffy all-siloxane bottlebrush architecture for liquid-like slippery surfaces

Gu, Yunjiao; Zhou, He; Liu, Fenghua; Zhou, Shuxue; Wu, Weiping

doi:10.1039/d3ta03536k

Cited by 4 publications

(1 citation statement)

References 60 publications

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“…To address the above challenges, a liquid-like polymer brush has emerged as a solution. Different from slippery liquid-infused porous surfaces, the monolayer of liquid-like polymer brush is covalently grafted onto the substrate surface, ensuring that the lubricant molecules are not affected by evaporation or fluid erosion. − However, the monolayer of liquid-like polymer brush is limited to the substrates with the smooth surface, and moreover, grafting incompleteness of large-scale polymer brush inevitably occurs, thus elevating the risk of liquid pinning . Furthermore, the monolayer of polymer brush is also prone to lose its lubricating effect when subjected to prolonged mechanical abrasion …”

Section: Introductionmentioning

confidence: 99%

Transparent and Durable Antismudge Polyurethane Coatings with Octadecyl Chlorosilane-Enhanced Bihydroxypropyl PDMS Polymer Brushes

Zhao,

Wu,

Zhou

2024

ACS Appl. Polym. Mater.

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A liquid-like poly(dimethylsiloxane) (PDMS) brush as an environmentally friendly, low surface energy modifier has a significant effect on improving the antismudge properties of coatings. However, in order to obtain a sufficient length of freely mobile chain segments to meet the liquid repellency, expensive single-terminal functionalized PDMS has to be chosen in the preparation of antismudge coatings. In this work, double-terminal functionalized PDMS was employed to fabricate antismudge polyurethane (PU) coatings with the help of alkyltrichlorosilane (RSiCl 3 ). That is, bihydroxypropyl PDMS (BHPDMS) was terminated with RSiCl 3 , further grafted onto acrylic polyol chains using its residual Si−Cl bonds, and subsequently cured with an isocyanate trimer. Effects of the molecular weight of BHPDMS (M n = 1000, 2000, 4300, and 10,000 g/mol) and the type of RSiCl 3 (R = methyl, dodecyl, octadecyl) on the surface wettability of antismudge PU coatings were investigated. Among them, octadecyltrichlorosilane (OTS) terminated BHPDMS 4300 exhibited the lowest water contact angle hysteresis (10.1°), which was even lower than that of the control samples via direct addition of monohydroxypropyl PDMS or BHPDMS 4300 . The antismudge PU coating also presented high transparency (90.5%) and excellent liquid repellency against various low surface tension liquids. Even after friction with steel wool, the coating can still maintain excellent antismudge performance. The results also showed enhancement of OTS on the liquid repellency of antismudge PU coatings, indicating its synergistic effect with BHPDMS brush. It is envisioned that OTS-terminated BHPDMS additive provides an avenue to fabricate cost-effective transparent antismudge PU coatings.

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Section: Introductionmentioning

confidence: 99%

Transparent and Durable Antismudge Polyurethane Coatings with Octadecyl Chlorosilane-Enhanced Bihydroxypropyl PDMS Polymer Brushes

Zhao,

Wu,

Zhou

2024

ACS Appl. Polym. Mater.

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Bioinspired Slippery Surfaces for Liquid Manipulation from Tiny Droplet to Bulk Fluid

Wang,

Ma,

Zhu

et al. 2024

Advanced Materials

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Slippery surfaces, which originate in nature with special wettability, have drawn a great deal of attention for both fundamental research and practical applications in a variety of fields due to their unique characteristics of super‐low liquid friction and adhesion. Although the research of bioinspired slippery surfaces is in its infancy, it is a rapidly growing and enormously promising field. Herein, we present a systematic review of recent progress in bioinspired slippery surfaces, beginning with a brief introduction of several typical creatures with slippery property in nature. Subsequently, a detailed discussion the basic concepts of the wetting, friction and drag from micro and macro aspects and focus on the underlying slippery mechanism. We next summarize state‐of‐the‐art developments of the three categories of slippery surfaces of air‐trapped, liquid‐infused and liquid‐like slippery surfaces, including materials, design principles and preparation methods of slippery surfaces and highlight the emerging applications. Finally, the current challenges and future prospects of various slippery surfaces are addressed.This article is protected by copyright. All rights reserved

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Liquid‐Like Surfaces with Enhanced De‐Wettability and Durability: From Structural Designs to Potential Applications

Cheng,

Zhao,

Wang

et al. 2024

Advanced Materials

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Liquid‐like surfaces (LLSs) with dynamic repellency toward various pollutants (e.g., bacteria, oil, and ice), have shown enormous potential in the fields of biology, environment, and energy. However, most of the reported LLSs cannot meet the demands for practical applications, particularly in terms of de‐wettability and durability. To solve these problems, considerable progress has been made in enhancing the de‐wettability and durability of LLSs in complex environments. Therefore, this review mainly focuses on the recent progress in LLSs, encompassing designed structures and repellent capabilities, as well as their diverse applications, offering greater insights for the targeted design of desired LLSs. First, a detailed overview of the development of LLSs from the perspective of their molecular structural evolution is provided. Then highlight recent approaches for enhancing the dynamic de‐wettability and durability of LLSs by optimizing their structural designs, including linear, looped, crosslinked, and hybrid structures. Later, the diverse applications and unique advantages of recently developed LLSs, including repellency (e.g., liquid anti‐adhesion/transportation/condensation, anti‐icing/scaling/waxing, and biofouling repellency) are summarized. Finally, Perspectives on potential innovative advancements and the promotion of technology selection to advance this exciting field are offered.

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A fluffy all-siloxane bottlebrush architecture for liquid-like slippery surfaces

Abstract: A transparent all-siloxane bottlebrush liquid-like surface is created by in situ sequential reactions. This unique non-linear architecture improves the grafting density and shows superior sliding performances compared to its linear counterparts.

Cited by 4 publications

References 60 publications

Transparent and Durable Antismudge Polyurethane Coatings with Octadecyl Chlorosilane-Enhanced Bihydroxypropyl PDMS Polymer Brushes

Transparent and Durable Antismudge Polyurethane Coatings with Octadecyl Chlorosilane-Enhanced Bihydroxypropyl PDMS Polymer Brushes

Bioinspired Slippery Surfaces for Liquid Manipulation from Tiny Droplet to Bulk Fluid

Liquid‐Like Surfaces with Enhanced De‐Wettability and Durability: From Structural Designs to Potential Applications

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