Multicolor and Multistage Response Electrochromic Color-Memory Wearable Smart Textile and Flexible Display

This study designed and synthesised a meta-amide-substituted dianiline monomer (m-DABA) as a stereoisomer of DABA, a previously investigated para-amide-substituted dianiline monomer. This new monomer was polymerised with pyromellitic dianhydride (PMDA) to prepare a polyimide film (m-DABPI) in a process similar to that employed in a previous study. The relationship between the substitution positions on the monomer and the gas barrier properties of the polyimide film was investigated via molecular simulation, wide-angle X-ray diffraction (WXRD), and positron annihilation lifetime spectroscopy (PALS) to gain deeper insights into the gas barrier mechanism. The results showed that compared with the para-substituted DABPI, the m-DABPI exhibited better gas barrier properties, with a water vapour transmission rate (WVTR) and an oxygen transmission rate (OTR) as low as 2.8 g·m−2·d−1 and 3.3 cm3·m−2·d−1, respectively. This was because the meta-linked polyimide molecular chains were more tightly packed, leading to a smaller free volume and lower molecular chain mobility. These properties are not conducive to the permeation of small molecules into the film; thus, the gas barrier properties were improved. The findings have significant implications for the structural design of high-barrier materials and could promote the development of flexible display technology.

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19.1: Synthesis and Spectral Quality of Flexible Display Dichroic Dye Polarizer

SID Symposium Digest of Technical Papers ◽

10.1002/sdtp.14402 ◽

2021 ◽

Vol 52 (S1) ◽

pp. 126-126

Author(s):

Xiaolian Li ◽

Rouchen Pan

Keyword(s):

Spectral Quality ◽

Flexible Display ◽

Dichroic Dye

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Knetex – Development of a textile-integrated sensor system for feedback-supported rehabilitation after surgery of the anterior cruciate ligament

Current Directions in Biomedical Engineering ◽

10.1515/cdbme-2020-3095 ◽

2020 ◽

Vol 6 (3) ◽

pp. 368-371

Author(s):

Julia Demmer ◽

A. Kitzig ◽

N. Schlage ◽

G. Stockmanns ◽

E. Naroska

Keyword(s):

Anterior Cruciate Ligament ◽

Cruciate Ligament ◽

Sensors And Actuators ◽

Integrated Sensor ◽

Rehabilitation Process ◽

Active User ◽

Smart Textile ◽

First Results ◽

Anterior Cruciate ◽

The One

AbstractPatients often report an effect after surgery of the anterior cruciate ligament which is called "giving way". This manifest itself by a drop of the knee or a felt instability. This phenomenon is difficult to measure and validate because it usually does not occur regularly and is not reproducible under laboratory conditions. The Knetex project takes up this point by trying to actively support the rehabilitation process with a bandage that can be worn in everyday life and is constructed as a smart textile using sensors and actuators. For this purpose, on the one hand it is attempted to actively record the phenomenon of the "giving way" by measuring knee angles etc. and by active user feedback. At the same time, the patient is specifically advised by means of actuators to correct incorrect posture or movement in order to make the rehabilitation process more effective and prevent further damage. Two 9-axis IMUs (inertial measurement units) form the basis of the system. These are used together with a textile strain sensor to calculate the knee angles. This paper gives an overview of the planned system, the initial experiments to measure the knee angles and the first results of the actuator study.

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Review on Data Acquisition of Electrocardiogram Biometric Recognition in Wearable Smart Textile Shirts

Journal of Physics Conference Series ◽

10.1088/1742-6596/1900/1/012019 ◽

2021 ◽

Vol 1900 (1) ◽

pp. 012019

Author(s):

Muhammad Muizz Mohd Nawawi ◽

Khairul Azami Sidek ◽

Alaa K Y Dafhalla ◽

Amelia Wong Azman

Keyword(s):

Data Acquisition ◽

Biometric Recognition ◽

Smart Textile

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