Smart Materials with Phosphorus and Nitrogen Functionalities Suitable for Biomedical Engineering

2017 ◽  
pp. 65-79
Keyword(s):  
Smart Materials ◽  
Biomedical Engineering

Enhancing the Piezoresistance Senstivity and Repeatability of Carbon Nanotube/Silicone Nanocomposites

2014 ◽  
Vol 590 ◽  
pp. 207-210
Author(s):  
Xiao Xiang Zhang ◽  
Long Ba
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Materials ◽  
Carbon Black ◽  
Silicone Rubber ◽  
Smart Materials ◽  
Biomedical Engineering ◽  
Rubber Composites ◽  
Rubber Composite ◽  
Percolation Network

The nanocomposites of carbon nanotube/polymer have been studied to explore their piezoresistance properties, which can be used as smart materials in the fields like biomedical engineering, robotic engineering, and advanced instrumentation. The differences in piezoresistance behavior of the previous studies were explained by the less uniformity of carbon nanotubes. To clarify the resistance versus deformation relations for carbon nanotube/silicone rubber composite materials, we have fabricated composite materials with various nanotube and carbon black contents. The measurements show that the resistance versus deformation sensitive range is depends on both the content of nanotube and carbon black, while the tiny variation of content of the carbon black affects largely the total piezoresistance sensitivity and repeatability. The experiment shows that adequate amount of carbon balck mixed with carbon nanotube can improve the piezoresistance repeatability. The deformation induced variation of the conducting percolation network shall be the dominating mechanism for the piezoresistance behavior of carbon nanotube/silicone rubber composites.

Active Moving Polymers and Multifunctional Composites: Shape the Future Structures

2013 ◽  
Vol 745 ◽  
pp. 129-134 ◽  
Author(s):  
Jin Song Leng
Keyword(s):  
Smart Materials ◽  
Biomedical Engineering ◽  
Composite Structures ◽  
Shape Memory Polymer ◽  
Multifunctional Composites ◽  
Deployable Structures ◽  
Wide Range ◽  
Space Deployable Structures ◽  
Short Carbon

Smart materials can be defined as the materials that have the capability of sensing and reacting to environmental conditions or stimuli. In recent years, a wide range of novel smart materials have been developed, the applications of which now cover various important fields including aerospace, automobile, telecommunications, and so forth. This talk mainly focuses on recent progresses of Active Moving Polymer (i.e. Shape Memory Polymer, SMP), and SMP based composite structures, as well as their applications including aerospace, astronautics and biomedical engineering. This presented work summarizes the recent advances in novel SMP including epoxy-based SMP, styrene-based SMP, cyanate ester-based SMP, polyurethane-based SMP, multiple SMP, design and characterization of SMP composites (SMPCs) filled with nickel chains, short carbon fiber, carbon nanotube chains, carbon nanopaper, and so on. The SMP stimulus methods, including heat, electric, light, magnetic field, and solvent have been introduced. The application of SMPCs used in aircraft morphing and space deployable structures is also investigated.

Additive manufacturing of smart materials exhibiting 4-D properties: A state of art review

2019 ◽  
pp. 089270571989505 ◽  
Author(s):  
Sudhir Kumar ◽  
Rupinder Singh ◽  
Ajay Batish ◽  
TP Singh
Keyword(s):  
Additive Manufacturing ◽  
Smart Materials ◽  
Biomedical Engineering ◽  
Fused Deposition Modelling ◽  
Smart Composite ◽  
Fused Deposition ◽  
Different Shapes ◽  
External Stimuli ◽  
State Of Art

This review highlights the additive manufacturing (AM) of smart materials, exhibiting 4-D properties under the affect of external stimulus. The smart materials are special in nature because they acquire different shapes, dimensional features (which may be altered a number of times in controlled fashion) when exposed to different external stimuli. Commercially, a number of smart materials are available that can be AM/3-D printed as metamaterials. Overall, this review outlines the applications of 3-D-printed material with 4-D properties for various applications (like biomedical, engineering, space science, structures, composites, etc.). A case study to evaluate the feasibility for in-house preparation of smart composite feedstock filament for fused deposition modelling-based 3-D printing has been presented for nonstructural engineering applications. The prepared filament in this case study has shown magnetic properties (which are considered essential for smart composite), so that when it may be triggered by external magnetic field to show 4-D behavior.

4D printing technology, modern era: A short review

2020 ◽  
pp. 92-111
Author(s):  
Khodadad Mostakim ◽  
Nahid Imtiaz Masuk ◽  
Md. Rakib Hasan ◽  
Md. Shafikul Islam
Keyword(s):  
Smart Materials ◽  
Computer Aided Design ◽  
Short Review ◽  
Stimuli Responsive ◽  
4D Printing ◽  
Space Applications ◽  
Printing Technology ◽  
Practical Applications ◽  
Biomedical Technologies ◽  
Novel Material

The advancement in 3D printing has led to the rapid growth of 4D printing technology. Adding time, as the fourth dimension, this technology ushered the potential of a massive evolution in fields of biomedical technologies, space applications, deployable structures, manufacturing industries, and so forth. This technology performs ingenious design, using smart materials to create advanced forms of the 3-D printed specimen. Improvements in Computer-aided design, additive manufacturing process, and material science engineering have ultimately favored the growth of 4-D printing innovation and revealed an effective method to gather complex 3-D structures. Contrast to all these developments, novel material is still a challenging sector. However, this short review illustrates the basic of 4D printing, summarizes the stimuli responsive materials properties, which have prominent role in the field of 4D technology. In addition, the practical applications are depicted and the potential prospect of this technology is put forward.

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