Discussion is presented on the use of the photoisomerization of azobenzene chromophore in the design and preparation of novel functional materials. The two systems reviewed are azobenzene polymer-stabilized liquid crystals and azobenzene elastomers. In the first case, a polymer network containing azobenzene moieties is used to optically induce and stabilize a long-range liquid crystal orientation without the need of treating the surfaces of the substrates. This optical and rubbing-free approach was applied to nematic and ferroelectric liquid crystals. In the second case, an azobenzene side-chain liquid crystalline polymer is grafted onto a styrene-butadiene-styrene triblock copolymer to yield a photoactive thermoplastic elastomer. Coupled mechanical and optical effects make possible the formation of diffraction gratings that may be useful for mechanically tunable optical devices.
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机译:古民居的卫浴设施适应性设计模式与创作——以泉州蔡氏古民居「德棣厝」为例 =Adaptability Design Pattern and Creation of Sanitary Facilities in Ancient Dwellings—A Case Study of “De Di House” in Cai’s Ancient Residential Buildings of Quanzhou