Dual-responsive shape memory polymer arrays with smart and precise multiple-wetting controllability

具有智能、精细多浸润状态调控的双响应形状记 忆聚合物阵列


Smart-controlled surface wettability from super-hydrophilicity to superhydrophobicity has been extensively explored, and stimulus-responsive strategies have been widely accepted as a useful method to realize reversibility. However, achieving smart and precise wetting control remains challenging because most previous studies focused on stimulating single surface chemistry or microstructures. Herein, a dual-stimulus-responsive strategy that can synergistically stimulate surface chemistry and microstructures is demonstrated on the pH-responsive molecule poly(2-(diisopropylamino)ethyl methacrylate (PDPAEMA)-modified temperature-triggered shape memory polymer (SMP) arrays. The responsive PDPAEMA and SMP can provide the surface with tunable surface chemistry and microstructures, respectively. Thus, the wetting of the surface between various states can be reversibly and precisely controlled from superhydrophilicity to super-hydrophobicity with contact angle (CA) differences of less than 15° under the cooperative effect between the adjustable surface microstructure and chemistry. The surface is further utilized as a platform to create gradient wettings based on its excellent controllability. Therefore, this work presents a strategy for surface wetting control by combining tunable surface microstructures and chemistry. The prepared samples with a special wetting controllability can be applied to numerous fields, including adaptive liquid microlenses, accurate drug release, and selective catalysis. This work also proposes novel expectations in designing smart functional surfaces.


近年来, 具有超亲水到超疏水转变的智能可控浸润性表面引 起了人们的广泛关注. 由于大多数报道仅采用单一的调控手段, 即 单一表面化学调控或单一的微结构调控, 表面浸润性的智能、精 细调控目前仍然很难实现. 本文中, 我们将pH响应的分子聚2-(二 异丙基氨基)甲基丙烯酸乙酯(PDPAEMA)修饰到温度响应的形状 记忆聚合物(SMP)阵列表面, 获得了一种可实现表面化学和微结构 协同调控的双刺激响应材料. 其中PDPAEMA (pH刺激)和SMP (温 度刺激)分别保证了表面化学和微结构的可调节性, 通过调节pH和 温度, 可使表面化学和表面微结构协同作用, 从而在所得表面上实 现超亲水到超疏水范围的智能可逆转变, 转变精度小于15°. 另外, 利用其优异的浸润性可控特性, 所得表面可用于制备梯度浸润性 控制平台. 本文所制备表面在自适应液体微透镜、精确药物释 放、选择性催化等领域具有良好的应用前景, 同时也为设计和开 发新型智能浸润性提供了参考.


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This work was supported by the National Natural Science Foundation of China (21674030, 22075061 and 51790502), the Funding of Key Laboratory of Bioinspired Materials and Interfacial Science, the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, and China National Postdoctoral Program for Innovative Talents (BX20200106).

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Corresponding authors

Correspondence to Zhongjun Cheng 成中军 or Yuyan Liu 刘宇艳.

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Author contributions

Liu Y and Cheng Z conceived the idea; Jiang L revised the idea; Zhang D prepared the materials and conducted most of the measurements; Zhang D and Xia Q wrote the paper; Lai H revised the paper; Liu P performed most of the SEM characterizations; Zhang H analyzed the XPS results. All authors discussed the results and commented on the manuscript.

Conflict of interest

The authors declare that they have no conflict of interest.

Dongjie Zhang received her BS degree (2014) and PhD degree (2020) at Harbin Institute of Technology, China. During 2018 to 2019, she stayed at the University of British Columbia in Canada as a visiting student in Mark MacLachlan’s group. She is currently a postdoc at the School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China. Her present research interest focuses on shape memory polymer with special wettability.

Zhongjun Cheng obtained his BS degree (2003) and MS degree (2006) in chemistry at Jilin University in Jilin, China, and PhD degree (2009) at the Institute of Chemisty, Chinese Academy of Sciences under the supervision of Prof. Lei Jiang. He is currently an associate professor at Harbin Institute of Technology, Harbin, China. His scientific interest is design and fabrication of superwetting materials with dynamic tunable micro-/nano-structures, and related applications.

Yuyan Liu obtained her BS and PhD degrees from the Department of Polymer Materials and Engineering, Harbin Institute of Technology, Harbin, China. During 2001 to 2002, she worked at the University of Tokyo in Japan as a visiting scholar. She is currently a professor at Harbin Institute of Technology. Her research interests include construction and intelligent control of micro-/nano-structure on polymer surface, spatial flexible rigid materials, shape memory polymer and composite materials, and recycling of polymer materials.

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Zhang, D., Xia, Q., Lai, H. et al. Dual-responsive shape memory polymer arrays with smart and precise multiple-wetting controllability. Sci. China Mater. (2021). https://doi.org/10.1007/s40843-020-1554-y

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  • wetting control
  • shape memory polymer
  • superhydrophobicity
  • superhydrophilicity