Journal ArticleDOI
Biomimetic Gradient Polymers with Enhanced Damping Capacities
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TLDR
The present result provides an effective route toward high damping materials by the fabrication of gradient structures and shows a broader effective damping temperature range combining with good mechanical properties.Abstract:
Designing gradient structures, mimicking biological materials, such as pummelo peels and tendon, is a promising strategy for developing advanced materials with superior energy damping capacities. Here a facile and effective approach for fabricating polymers with composition gradients at millimeter length scale is presented. The gradient thiol-ene polymers (TEPs) are created by the use of density difference of ternary thiol-ene-ene precursors and the subsequent photo-crosslinking via thiol-ene reaction. The compositional gradients are analyzed via differential scanning calorimeter (DSC), compressive modulus testing, atomic force microscopy (AFM) indentation, and swelling measurements. In contrast to homogeneous TEPs networks, the resultant gradient polymer shows a broader effective damping temperature range combining with good mechanical properties. The present result provides an effective route toward high damping materials by the fabrication of gradient structures.read more
Citations
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Crushing resistance and energy absorption of pomelo peel inspired hierarchical honeycomb
TL;DR: In this article, a pomelo peel-inspired hierarchical honeycomb was constructed and investigated the crushing resistance along with energy absorption capabilities of such structural materials and an integrated analytical-numerical approach was developed to fully elucidate the underlying quantitative structure property relations by parametric studies on the evaluation of different hierarchical orders and equivalent thickness.
Journal ArticleDOI
Biomimetic Materials with Multiple Protective Functionalities
Zenghe Liu,Luzhi Zhang,Qingbao Guan,Yifan Guo,Jiaming Lou,Dong Lei,Shuliang Wang,Shuo Chen,Lijie Sun,Huixia Xuan,Eric M. Jeffries,Chuanglong He,Feng-Ling Qing,Zhengwei You +13 more
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Understanding Toughness in Bioinspired Cellulose Nanofibril/Polymer Nanocomposites
TL;DR: This study establishes quantitative structure/property relationships in CNF/(co)polymer nanopapers and opens the design space for future, rational molecular engineering using reversible supramolecular bonds or covalent cross-linking.
Journal ArticleDOI
Multilayered assembly of poly(vinylidene fluoride) and poly(methyl methacrylate) for achieving multi-shape memory effects
Xiaoying Ji,Dayong Chen,Yu Zheng,Jiabin Shen,Shaoyun Guo,Eileen Harkin-Jones,Eileen Harkin-Jones +6 more
TL;DR: In this paper, an alternately-organized poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) multilayer materials were prepared through layer-multiplying coextrusion.
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Lessons from nature: 3D printed bio-inspired porous structures for impact energy absorption – a review
TL;DR: In this article , different types of biomimetic porous structures seen in nature, many of which are composite structures, and categorise them are identified and illustrated their functions and shown how these porous structures have been mimicked for engineering applications.
References
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Journal ArticleDOI
Thiol–enes: Chemistry of the past with promise for the future
TL;DR: The photopolymerization of mixtures of multifunctional thiols and enes is an efficient method for the rapid production of films and thermoset plastics with unprecedented physical and mechanical properties.
Journal ArticleDOI
The Thiol-Michael Addition Click Reaction: A Powerful and Widely Used Tool in Materials Chemistry
Devatha P. Nair,Maciej Podgórski,Maciej Podgórski,Shunsuke Chatani,Tao Gong,Weixian Xi,Christopher R. Fenoli,Christopher N. Bowman +7 more
TL;DR: This review examines the reaction mechanisms, the substrates and catalysts used in the reaction, and the subsequent implementation of the thiol-Michael reaction in materials science.
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The power of thiol-ene chemistry
TL;DR: In this paper, the impact of thiol-ene chemistry on polymer and materials science over the past five years is reviewed, and the utility of the reactions for network formation, polymer functionalization, dendrimer synthesis and the decoration of three-dimensional objects is discussed.
Journal ArticleDOI
Graded Materials for Resistance to Contact Deformation and Damage
TL;DR: This review assesses the current understanding of the resistance of graded materials to contact deformation and damage, and outlines future research directions and possible applications for graded materials.
Journal ArticleDOI
Self-Concentrations and Effective Glass Transition Temperatures in Polymer Blends
Timothy P. Lodge,Tom McLeish +1 more
TL;DR: In this paper, a self-concentration φ is estimated by assigning a length scale (or volume) to a particular dynamic mode, and then the relevant self-consistency φs can be estimated.