A film with "brick-and-mortar" structure was prepared by layer-by-layer (LBL) technique using polyvinyl alcohol (PVA) and polymethyl methacrylate (PMMA) as the flexible material or "mortar" and mica as the rigid material or "brick". The film deposited on a glass slide after self-assembly cycles had a thickness of 3 μm thick and an uneven, wavy surface. The film exhibits enhanced mechanical properties, i e, the hardness and indentation modulus values could reach 6.14 and 68.41 GPa, respectively. The hardness and elastic toughness were found to be depended on three factors, i e, the ratio of PVA to mica, the number of self-assembly cycles, and the pretreatment method of the mica suspension. The self-assembly process was driven by formation of the hydrogen bonds between the silanol groups of mica and the hydroxyl groups of PVA and carbonyl groups of PMMA.

GAO Yining;LIU Peng;YANG Lu;HU Chuanlin;WANG Fazhou

State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Chem-istry, Chemical Engineering and Life Science,Wuhan University of Technology,Wuhan 430070,China

武汉理工大学学报（材料科学版）（英文版）

[1]GAO Yining;LIU Peng;YANG Lu;HU Chuanlin;WANG Fazhou-.Biomimetic "Nacre-like" Films Prepared via Layer-by-Layer Self-assembly of Mica, Polyvinyl Alcohol and Polymethyl Methacrylate)[J].武汉理工大学学报（材料科学版）（英文版）,2022(04):554-558

Nacre

Biomimetic,like,Films,Prepared,via,Layer,by,Self,assembly,Mica,Polyvinyl,Alcohol,Polymethyl,Methacrylate,film,brick,mortar,structure,was,prepared,layer,LBL,technique,using,polyvinyl,alcohol,PVA,polymethyl,methacrylate,PMMA,flexible,material,mica,rigid,deposited,glass,slide,after,self,cycles,had,thickness,uneven,wavy,surface,exhibits,enhanced,mechanical,properties,hardness,indentation,modulus,values,could,reach,GPa,respectively,elastic,toughness,were,found,depended,three,factors,ratio,number,pretreatment,method,suspension,process,driven,formation,hydrogen,bonds,between,silanol,groups,hydroxyl,carbonyl

0.631593