期刊
ANNUAL REVIEW OF BIOPHYSICS, VOL 42
卷 42, 期 -, 页码 651-673出版社
ANNUAL REVIEWS
DOI: 10.1146/annurev-biophys-083012-130345
关键词
mechanical properties; biocomposites; natural fibers; flaw tolerance; critical length scales
类别
This review examines size effects observed in the mechanical strength of biopolymers that are organized in microstructures such as fibrils, layered composites, or particle nanocomposites. We review the most important aspects that connect nanoconfinement of basic material constituents at critical length scales to the mechanical performance of the entire material system: elastic modulus, strength, extensibility, and robustness. We outline theoretical and computational analysis as well as experimentation by emphasizing two strategies found in abundant natural materials: confined fibrils as part of fibers and confined mineral platelets that transfer load through a biopolymer interface in nanocomposites. We also discuss the application of confinement as a mechanism to tailor specific material properties in biological systems.
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