私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

A novel shape memory hydrogel with photo-adaptable permanent shape has been developed on the basis of alginate-Ca²⁺ coordination and the host–guest interaction between α-cyclodextrin and azobenzene. The reversible nature of alginate-Ca²⁺ confers the hydrogel with functions such as shape memory and shape recovery, and the light-responsive transition of azobenzene could be applied to generate a new permanent shape by tuning the host–guest complexation via UV light.