BIA, INRA, 44300 Nantes, France.
Institut des Matériaux Jean Rouxel (IMN), UMR 6502, CNRS-Université de Nantes , 44322 Nantes, France.
Langmuir. 2017 May 2;33(17):4138-4145. doi: 10.1021/acs.langmuir.7b00049. Epub 2017 Apr 20.
Young's moduli of cellulose nanofibril (CNF)-poly(allylamine hydrochloride) (PAH) multilayered thin films were measured using strain-induced elastic buckling instability for mechanical measurements (SIEBIMM) and the quantitative nanomechanical mapping technique (PF-QNM). To establish the relationship between structure and mechanical properties, three types of films with various architectures were built using the layer-by-layer method by changing the ionic strength of the dipping solution. Both methods demonstrate that the architecture of a film has a strong impact on its mechanical properties even though the film has similar cellulose content, emphasizing the role of the architecture. Films with lower porosity (Φ = 0.34) and a more intricate network display the highest Young's moduli (9.3 GPa), whereas others with higher and similar porosity (Φ = 0.46-0.48) present lower Young's moduli (4.0-5.0 GPa). PF-QNM measurements indicate a reverse ranking that is probably indicative of the surface composition of the films.
使用应变诱导弹性失稳力学测量法（SIEBIMM）和定量纳米力学映射技术（PF-QNM）测量纤维素纳米纤维（CNF）-聚烯丙基盐酸盐（PAH）多层薄膜的杨氏模量。为了建立结构与力学性能之间的关系，通过改变浸渍溶液的离子强度，使用层层法构建了三种具有不同结构的薄膜。这两种方法都表明，即使薄膜具有相似的纤维素含量，薄膜的结构对其力学性能也有很强的影响，强调了结构的作用。具有较低孔隙率（Φ=0.34）和更复杂网络的薄膜表现出最高的杨氏模量（9.3 GPa），而其他具有较高和相似孔隙率（Φ=0.46-0.48）的薄膜则表现出较低的杨氏模量（4.0-5.0 GPa）。PF-QNM 测量表明存在相反的排序，这可能表明薄膜的表面组成。
