摘要
Smart-controlled surface wettability from superhydrophilicity 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 dualstimulus-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 superhydrophobicity 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.
作者
Dongjie Zhang
Qixing Xia
Hua Lai
Zhongjun Cheng
Pengchang Liu
Haiyang Zhang
Yuyan Liu
Lei Jiang
张东杰;夏琦兴;来华;成中军;刘鹏昌;张海洋;刘宇艳;江雷(State Key Laboratory of Urban Water Resource&Environment,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China;Institute of Culture and Heritage,Northwest Polytechnical University,Xi’an 710000,China;CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China)
基金
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,China National Postdoctoral Program for Innovative Talents(BX20200106)。
