Low-energy Consuming Switchable Smart Windows

July 14, 2023

The Ministry of Science and Technology has unveiled a groundbreaking technique for confining liquid crystals using hierarchical double networks of polymers. This innovative method holds immense potential in the development of low-energy consumption on-demand switchable smart windows.

Understanding Interpenetrating Polymer Networks (IPNs)

Interpenetrating polymer networks (IPNs) are renowned for their ability to optimize different functionalities in engineering and biomedical applications. These networks combine rigid and soft networks, leading to enhanced mechanical, optical, and electrical properties. Within this class of architectures, the focus has shifted towards hierarchical double networks due to their synergistic combination of properties.

Realizing Double Networks: Light and Temperature

Researchers have taken hierarchical double networks to new heights by superimposing them atop liquid crystals. This achievement is made possible by utilizing two distinct stimuli: light and temperature. The first network is created through orientationally self-assembled polymer networks driven by light. Simultaneously, the organogelation of the second active component, triggered by temperature, forms the second network, effectively trapping the first one.

The Power of a Well-Controlled Porous Hierarchical Network

The outcome of this technique is a meticulously controlled porous hierarchical network that confines the liquid crystal while allowing for electrical switching between direction-dependent states. The virtual surfaces created by the polymeric and gel nature of the network govern the dynamics of the liquid crystal, leading to versatile functionality.

Advancing Privacy Windows with High Spatial Resolution

One of the remarkable applications of hierarchical physical networks is the realization of low-energy consuming on-demand switchable privacy windows. These windows offer the ability to switch between high and low haze states, achieving high spatial resolution through present-day lithography techniques. With such windows, privacy can be easily controlled while ensuring optimal energy consumption.

Future Prospects and Implications

The development of hierarchical double networks opens up new avenues for the advancement of smart window technology. The technique’s ability to confine liquid crystals, coupled with its electrical switching capabilities and efficient energy consumption, holds promise for various fields, including architecture, automotive, and aerospace industries. As researchers continue to explore and refine these networks, we can anticipate further breakthroughs in the realm of smart windows and related applications.

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