scholarly journals Shape memory materials and 4D printing in pharmaceutics

2021 ◽  
Vol 173 ◽  
pp. 216-237
Author(s):  
Alice Melocchi ◽  
Marco Uboldi ◽  
Matteo Cerea ◽  
Anastasia Foppoli ◽  
Alessandra Maroni ◽  
...  
Author(s):  
Ashutosh Singh ◽  
◽  
Ravi Butola ◽  
Jitendra Bhaskar ◽  

Improvements in soft robotics, materials, and flexible gripper technology made it possible for the soft grippers to advance rapidly. A brief analysis of soft robotic grippers featuring various material collections, physical rules, and system architectures is provided here. Soft gripping is divided into three technologies, enabling gripping with: a) actuation, b) material used, and c) Use of 3D printing in fabricating grippers. An informative analysis is provided of every form. Similar to stiff grippers, flexible and elastic end-effectors may also grab or control a broader variety of objects. The inherent versatility of the materials is increasingly being used to study advanced materials and soft structures, particularly silicone elastomers, shape-memory materials, active polymers, and gels, in the development of compact, simple, and more versatile grippers. For future work, enhanced structures, techniques, and senses play a prominent part.


Engineering ◽  
2017 ◽  
Vol 3 (5) ◽  
pp. 663-674 ◽  
Author(s):  
Amelia Yilin Lee ◽  
Jia An ◽  
Chee Kai Chua

2021 ◽  
pp. 2100257
Author(s):  
Manik Chandra Biswas ◽  
Samit Chakraborty ◽  
Abhishek Bhattacharjee ◽  
Zaheeruddin Mohammed

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wang Zhang ◽  
Hao Wang ◽  
Hongtao Wang ◽  
John You En Chan ◽  
Hailong Liu ◽  
...  

AbstractFour-dimensional (4D) printing of shape memory polymer (SMP) imparts time responsive properties to 3D structures. Here, we explore 4D printing of a SMP in the submicron length scale, extending its applications to nanophononics. We report a new SMP photoresist based on Vero Clear achieving print features at a resolution of ~300 nm half pitch using two-photon polymerization lithography (TPL). Prints consisting of grids with size-tunable multi-colours enabled the study of shape memory effects to achieve large visual shifts through nanoscale structure deformation. As the nanostructures are flattened, the colours and printed information become invisible. Remarkably, the shape memory effect recovers the original surface morphology of the nanostructures along with its structural colour within seconds of heating above its glass transition temperature. The high-resolution printing and excellent reversibility in both microtopography and optical properties promises a platform for temperature-sensitive labels, information hiding for anti-counterfeiting, and tunable photonic devices.


2017 ◽  
Vol 136 ◽  
pp. 238-248 ◽  
Author(s):  
L. Sun ◽  
W.M. Huang ◽  
T.X. Wang ◽  
H.M. Chen ◽  
C. Renata ◽  
...  

Author(s):  
Timur Sh. KOMBAEV ◽  
Mikhail K. ARTEMOV ◽  
Valentin K. SYSOEV ◽  
Dmitry S. DEZHIN

It is proposed to develop a small spacecraft for an experiment using high-temperature superconductors (HTS) and shape memory materials. The purpose of the experiment is to test a technological capability of creating a strong magnetic field on the small spacecraft using HTS and shape memory materials for deployed large-area structures, and study the magnetic field interaction with the solar wind plasma and the resulting force impact on the small spacecraft. This article is of a polemical character and makes it possible to take a fresh look at the applicability of new technologies in space-system engineering. Key words: high-temperature superconductors, shape memory materials, solar wind, spacecraft.


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