A review of shape memory alloy research, applications and opportunities

Singular Integral Equations. By N.I. Muskhelishvili. Translated fromthe 2nd Russian edition by J.R.M. Radok. Pp. 447. F1. 28.50. 1953. (Noordhoff, Groningen)

This Review focuses on noncovalent functionalization of graphene and graphene oxide with various species involving biomolecules, polymers, drugs, metals and metal oxide-based nanoparticles, quantum dots, magnetic nanostructures, other carbon allotropes (fullerenes, nanodiamonds, and carbon nanotubes), and graphene analogues (MoS2, WS2). A brief description of π–π interactions, van der Waals forces, ionic interactions, and hydrogen bonding allowing noncovalent modification of graphene and graphene oxide is first given. The main part of this Review is devoted to tailored functionalization for applications in drug delivery, energy materials, solar cells, water splitting, biosensing, bioimaging, environmental, catalytic, photocatalytic, and biomedical technologies. A significant part of this Review explores the possibilities of graphene/graphene oxide-based 3D superstructures and their use in lithium-ion batteries. This Review ends with a look at challenges and future prospects of noncovalently modified graph...

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Noncovalent Functionalization of Graphene and Graphene Oxide for Energy Materials, Biosensing, Catalytic, and Biomedical Applications

Shape-memory polymers and their composites: Stimulus methods and applications

Along with extensive research on the three-dimensional (3D) printing of polymers and metals, 3D printing of ceramics is now the latest trend to come under the spotlight. The ability to fabricate ceramic components of arbitrarily complex shapes has been extremely challenging without 3D printing. This review focuses on the latest advances in the 3D printing of ceramics and presents the historical origins and evolution of each related technique. The main technical aspects, including feedstock properties, process control, post-treatments and energy source–material interactions, are also discussed. The technical challenges and advice about how to address these are presented. Comparisons are made between the techniques to facilitate the selection of the best ones in practical use. In addition, representative applications of the 3D printing of various types of ceramics are surveyed. Future directions are pointed out on the advancement on materials and forming mechanism for the fabrication of high-performance ceramic components.

3D printing of ceramics: A review

Sol-gel-derived SiBOC ceramics with highly graphitized free carbon

https://northumbria-test.eprints-hosting.org/id/document/270453

Cooperative dynamics of heuristic swelling and inhibitive micellization in double-network hydrogels by ionic dissociation of polyelectrolyte

Ceramic green tape extrusion for laminated object manufacturing

This present paper is focused on the effect of conductive particulate and fibrous fillers on the characterized property of
styrene-based shape memory polymer incorporating carbon black (CB) and short carbon fiber (SCF). It was shown that
the particulate additives are dispersed homogeneously within matrix and served as interconnections between the fibers,
while the fibrous additives may be considered as a rigid long aggregate of carbon, leading to easy formation of
continuous conductive networks. The glass transition temperature of nanocomposites drops sharply as compared with
that of pure SMP from the differential scanning calorimetry (DSC). For the composite containing 5 wt% CB and 2 wt%
SCF, the storage modulus increases by 16.2% compared to that of the composite containing 5 wt% CB and 1 wt% SCF;
the peak of tangent delta curve is an alternative definition of Tg, thus Tg defined in such a way is determined as 69.44°C
from Dynamic Mechanical Analyzer (DMA) test which is higher than 25.78°C obtained from DSC test. The electrical
conductivity of the composite achieves 3 S/cm by four-point Van De Pauw method, and the shape recovery can be
activated with a constant voltage of 25 V through them.

Electro-induced shape-memory polymer nanocomposite containing conductive particles and short fibers

A new interaction integral formulation is derived for obtaining mixed-mode stress intensity factors (SIFs) of an interface crack with the tip close to complicated material interfaces. The method is a conservation integral that relies on two admissible mechanical states (actual and auxiliary fields). By a suitable selection of the auxiliary fields, the domain formulation does not contain any integral related to the material interfaces, which makes it quite convenient to deal with complicated interface problems. The numerical implementation of the derived expression is combined with the extended finite element method (XFEM). According to the numerical calculations, the interaction integral shows good accuracy for straight and curved interface crack problems and exhibits domain-independence for material interfaces. Finally, an interfacial fracture problem is investigated for the representative centrosymmetric structure formed by two constituent materials.

Shanyi Du

Papers

Sol-gel-derived SiBOC ceramics with highly graphitized free carbon

Cooperative dynamics of heuristic swelling and inhibitive micellization in double-network hydrogels by ionic dissociation of polyelectrolyte

Ceramic green tape extrusion for laminated object manufacturing

Electro-induced shape-memory polymer nanocomposite containing conductive particles and short fibers

Investigation of Stress Intensity Factors for an Interface Crack in Multi-Interface Materials Using an Interaction Integral Method