@article{6d856b04e86f464894f7e297aebc3a29,
title = "Engineering crack tortuosity in printed polymer-polymer composites through ordered pores",
abstract = "Multimaterial additive manufacturing is an enabling tool for exploring difficult to access structure-property relationships. In this work, a recently developed multimaterial printing approach, solution mask liquid lithography, is used to produce porous polymer-polymer composites inspired by tough, hierarchical structures found in nature. The results demonstrate that varying the size and packing of pores in the core structure leads to significant enhancement in crack deflection. Finite element analysis reveals that this enhancement is linked to geometry-dependent stress distribution. This journal is ",
keywords = "MUSSEL BYSSUS, CROSS-LINKING, MECHANISMS, NANOSCALE, DESIGN, STIFF",
author = "Gockowski, {Luke F.} and Dolinski, {Neil D.} and Roberto Chavez and Noy Cohen and Fabian Eisenreich and Stefan Hecht and McMeeking, {Robert M.} and Hawker, {Craig J.} and Valentine, {Megan T.}",
note = "This work was supported by the MRSEC Program of the National Science Foundation through Grant No. DMR-1720256 (IRG-3). N. D. D. was supported by the U.S. Army Research Office under Cooperative Agreement W911NF-19-2-0026 for the Institute for Collaborative Biotechnologies. L. F. G. was partially supported by NSF Grant No. BMAT-1410985. Views and conclusions are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of the U.S. Government. R. C. acknowledges support through the McNair Scholars program. The authors acknowledge the use of the Microfluidics Laboratory within the California NanoSystems Institute, supported by the University of California, Santa Barbara and the University of California, Office of the President as well as the Mechanical Test Laboratory of the UCSB Mechanical Engineering Department. The authors also thank Emmanouela Filippidi for providing the micrograph of the mussel plaque shown in Fig. 2a. Author Contributions L. F. G., N. D. D., C. J. H., and M. T. V. designed research. F. E. and S. H. synthesized diarylethene photoswitches. N. D. D. and R. C. prepared resins and printed samples; L. F. G. tested samples and analysed data. N. C. modelled the behavior of the materials and performed the finite element analysis. L. F. G., N. D. D., N. C., C. J. H., and M. T. V. interpreted results. L. F. G. and N. D. D wrote, and all authors edited, the manuscript. The research data underpinning this publication are available at https://doi.org/10.25349/D9P014. ",
year = "2020",
month = jul,
day = "1",
doi = "10.1039/d0mh00331j",
language = "English",
pages = "1854--1860",
journal = "Materials Horizons",
issn = "2051-6347",
publisher = "Royal Society of Chemistry",
number = "7",
}