Non fluorinated superhydrophobic coating resembling bird's nest structure enhances paper strength and mechanical wear resistance

Research Overview

According to the study published in Volume 222, Part A of Progress in Organic Coatings (January 2027), the author Qing Wu、Yanyang Lei、Hongtu Shen、Heyi Wang、Weiwei Cao、Yi Liu、Jiang Guo、Jianfeng Zhu A fluorine free superhydrophobic coating with a bird’s nest architecture was proposed and used for the preparation of high-strength, mechanically wear-resistant paper. This study focuses on the structural design and comprehensive performance of coatings on paper substrates, and belongs to the interdisciplinary work of organic coatings and functional materials.

Key points of structure and performance design

From the title and source information, the core of this work is to construct a superhydrophobic surface using a “bird’s nest” multi-level structure, while avoiding the use of fluorine-containing components.

. The fluorine free route has practical significance in terms of coating environmental properties and regulatory compliance, while the mechanical durability of superhydrophobic surfaces has long been a key bottleneck for the practical application of such coatings. The study aims to achieve high strength and mechanical wear resistance as performance targets for paper products, indicating that the focus is not only on the initial water repellent angle or surface morphology, but also extends to the structural retention ability during use.

Significance in the field of polymer aging and stabilization

For polymer aging and stabilization technology, the reference value of this study mainly lies in the correlation between surface interface structure and durability.

. When superhydrophobic coatings are used outdoors or under repeated friction conditions, the surface micro nano structure is easily damaged, which in turn affects the water repellent function and substrate protection effect. This is highly consistent with the functional maintenance issues thatweather stabilitydesign focuses on. If the coating is exposed to light, moisture, and mechanical action for a long time, its organic components also face the risk of oxidative degradation. Therefore, introducing a reasonable anti-oxidation system, HALS, and UVA at the formulation level, and balancing processing stability and long-term protection through a composite system, is a common technical path for further engineering of such functional coatings. It should be pointed out that the source only provides title, publication information, and author information, and does not disclose specific resin systems, types of additives, testing methods, and quantitative data. Therefore, the stability performance of the coating under polymer aging conditions, whether it contains photo stable components, and the morphological evolution of the bird’s nest structure before and after wear cannot be confirmed from existing sources. The above directions can serve as the focus of attention for subsequent tracking of the entire research.

Industry Observation

The combination of fluorine free superhydrophobic coatings and high-strength paper reflects that the research on functional coatings is shifting from a single wettability index to emphasizing both structural durability and substrate reinforcement.

. For the polymer additive industry, this means that the evaluation scenarios for stabilization schemes are expanding: not only should we look at the molecular weight maintenance under thermal processing and light exposure, but also at the attenuation law of surface function under the coupling effect of mechanical wear and outdoor exposure. Establishing characterization methods that are more closely related to actual service conditions around weather stability will help to accurately select antioxidant systems, HALS, UVA, and composite systems in functional coatings.

Information source:Fluorine-free superhydrophobic coatings with bird's nest architecture for high-strength and mechanically durable paper， Organized by Herun Chemical.