Jiangsu University

Jiean Wei

Shu Huang

Jianzhong Zhou

Jie Sheng

Hang Zhang

Mingyuan Shan

Wei Xu

Jinzhong Lu

Cheng Wang

Hongwei Yang

Shuangliu Zhou

The present disclosure provides a method for photo-curing 4D printing of a multi-layer structure with an adjustable shape recovery speed, and a multi-layer structure printed thereby. The multi-layer structure printed by the method for photo-curing 4D printing of the multi-layer structure with the adjustable shape recovery speed includes a plurality of deformation units sequentially connected in series, and each of the plurality of the deformation units includes two slow layers, a fast layer, and a transition layer; and the fast layer is arranged between the two slow layers, and the transition layer is arranged between at least one of the two slow layers and the fast layer. In the present disclosure, a low cross-linking layer is doped with a nanocarbon light-absorbing material to solve the problem that the low cross-linking layer is prone to over-curing when a high cross-linking layer is printed on the low cross-linking layer.

Method for photo-curing four-dimensional (4D) printing of multi-layer structure with adjustable shape recovery speed, and multi-layer structure prepared by photo-curing 4D printing

The present invention relates to the field of 4D printing, and particularly to an electro-responsive folding and unfolding composite material for 4D printing, a method for manufacturing the same, and a method for regulating shape memory behavior thereof. In the process of layer-by-layer printing, conductive layers are embedded into a pre-designed shape memory polymer matrix through spray-coating and laser-irradiation nano-fusion welding, to manufacture a folding and unfolding structure with electro-responsive shape memory behavior. The distribution and range of heat affected zones in the electro-responsive shape memory folding and unfolding structure are controlled by adjusting the number of electric heating layers energized and the value of an energizing voltage. The speed of shape recovery and the degree of shape recovery of the structure are regulated according to a magnitude relationship between a shape recovery force Fand a resistance Fto shape recovery of the structure.

Electro-responsive folding and unfolding composite material for 4D printing, method for manufacturing same, and method for regulating shape memory behavior thereof

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Jiangsu, China

Jiean Wei