New technology nanocomposite adhesive water -based adhesive

Water -based adhesives face several challenges despite their environmental advantages. A major problem is that the realization of a strong resistance to adhesion on various substrates, in particular in wet or humid conditions, is difficult due to the inherent properties of water -based systems. In addition, the volatility of water also leads to problems such as bubble formation and uneven drying, affecting the performance and appearance of adhesive.

In addition, the formulation of water -based adhesives with both a high content of solids and a low viscosity is technically demanding, because it requires a delicate ingredient balance to obtain the desired properties without compromising the stability of the ‘adhesive. These challenges must be met to fully make the potential of water -based adhesives in various industrial applications.

A team of materials from the materials led by Kun Chen from the University of South China technology in Guangzhou, China, recently carried out a significant breakthrough of adhesive technology by developing nanocompai Pot-PVA. These nanocomposites are created by combining polyvinyl alcohol (PVA) with clusters of polyoxotungstate of the Keggin 1 nm type which carry four negative charges. The resulting material has exceptional adhesion to hydrophilic surfaces, with high retication densities and fracture energies exceeding 6.23 kJ · m⁻².

The chaotrope effect of pots reduces PVA crystallinity, improving the dynamics of the chain of polymers and conferring robust adhesive properties through a wide temperature range of -196 to 100 ° C. This innovation takes up key challenges of adhesive adhesives water, offering a promising solution for ecological, versatile and durable adhesives adapted to various applications and extreme conditions.

The team published Their research in Nano Research.

“This breakthrough takes up key challenges in water -based adhesives, such as slow drying speed, low adhesion force in wet conditions and difficulties in achieving a high content with low viscosity”, said Kun Chen, principal researcher of the study, an associate professor professor at the School of Emerging Sweet Material at the University of Technology in South China.

“Our Pot-PVA nanocomposites not only overcome these limitations, but also set new standards for ecological, versatile and durable adhesives adapted to a wide range of applications and extreme conditions.”

The pots have a wide range of shapes and sizes, from simple spherical clusters to more complex cage -type structures. Keggin pots are very stable, both thermally and chemically, and can function as species, catalysts, and even as construction blocks for supramolecular assemblies. Their adjustable properties and their ability to interact with various substrates make them precious in fields such as Material scienceCatalysis and detection technologies.

The chaotrope effect of keggin pots reduces PVA crystallinity, improving the dynamics of the polymer chain. This not only improves membership, but also maintains the flexibility and sustainability of the adhesive.

The demand for high performance and environmentally friendly adhesives has increased in various industries. Traditional adhesives often find it difficult to maintain their performance under extreme conditions, limiting their applications. This research takes up these challenges by developing a novel nanocomposite which combines the advantages of the PVA with the unique properties of the pots.

Pot-PVA nanocomposites are robust adhesive Properties through an unprecedented temperature range, from -196 to 100 ° C. Their thermotability makes them ideal for use in extreme environments, such as cryogenic applications and at high temperature.

The development of these Pot-PVA nanocomposites has large-scale implications. Pot-PVA nanocomposites introduced into this research offer an overview of a future where adhesives can work exceptionally well in extreme conditions, while being environmentally friendly. They could revolutionize industries such as construction, automobile, aerospace and electronics by providing adhesives that can withstand extreme conditions. In addition, the ecological nature of these adhesives align with global efforts to reduce the environmental impact.