scholarly journals Fabrication of Colorimetric Textile Sensor Based on Rhodamine Dye for Acidic Gas Detection

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 431 ◽  
Author(s):  
Young Ki Park ◽  
Byeong M. Oh ◽  
A Ra Jo ◽  
Ji Hyeon Han ◽  
Jee Young Lim ◽  
...  
Keyword(s):  
Reaction Rate ◽  
Color Change ◽  
Ph Sensitivity ◽  
Gas Detection ◽  
Textile Sensors ◽  
Printed Sensors ◽  
Textile Sensor ◽  
Rhodamine Dye ◽  
Strong Acids ◽  
High Reaction Rate

For the immediate detection of gaseous strong acids, it is advantageous to employ colorimetric textile sensors based on halochromic dyes. Thus, a rhodamine dye with superior pH sensitivity and high thermal stability was synthesized and incorporated in nylon 6 and polyester fabrics to fabricate textile sensors through dyeing and printing methods. The spectral properties and solubility of the dye were examined; sensitivity to acidic gas as well as durability and reversibility of the fabricated textile sensors were investigated. Both dyed and printed sensors exhibited a high reaction rate and distinctive color change under the acidic condition owing to the high pH sensitivity of the dye. In addition, both sensors have outstanding durability and reversibility after washing and drying.

scholarly journals Colorimetric Textile Sensor for the Simultaneous Detection of NH3 and HCl Gases

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2595
Author(s):  
Young Ki Park ◽  
Hyun Ju Oh ◽  
Jong Hyuk Bae ◽  
Jee Young Lim ◽  
Hee Dong Lee ◽  
...  
Keyword(s):  
Low Cost ◽  
Simultaneous Detection ◽  
Polyester Fabric ◽  
Ph Sensitivity ◽  
Production Costs ◽  
Detection Rates ◽  
Color Changes ◽  
Textile Sensors ◽  
Textile Sensor ◽  
High Production

For the immediate detection of strong gaseous alkalis and acids, colorimetric textile sensors based on halochromic dyes are highly valuable for monitoring gas leakages. To date, colorimetric textile sensors for dual-gas detection have usually been fabricated by electrospinning methods. Although nanofibrous sensors have excellent pH sensitivity, they are difficult to use commercially because of their low durability, low productivity, and high production costs. In this study, we introduce novel textile sensors with high pH sensitivity and durability via a facile and low-cost screen-printing method. To fabricate these textiles sensors, Dye 3 and RhYK dyes were both incorporated into a polyester fabric. The fabricated sensors exhibited high detection rates (<10 s) and distinctive color changes under alkaline or acidic conditions, even at low gas concentrations. Furthermore, the fabricated sensors showed an outstanding durability and reversibility after washing and drying and were confirmed to contain limited amounts of hazardous materials. Thus, our results show that the fabricated textile sensors could be used in safety apparel that changes its color in the presence of harmful gases.

scholarly journals Textile Sensors: Silk Composite Electronic Textile Sensor for High Space Precision 2D Combo Temperature–Pressure Sensing (Small 31/2019)

Small ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 1970161 ◽  
Author(s):  
Ronghui Wu ◽  
Liyun Ma ◽  
Chen Hou ◽  
Zhaohui Meng ◽  
Wenxi Guo ◽  
...  
Keyword(s):  
Pressure Sensing ◽  
Textile Sensors ◽  
Textile Sensor ◽  
High Space ◽  
Electronic Textile

Closed Loop Controlled ER-Actuator

1996 ◽  
Vol 10 (23n24) ◽  
pp. 2867-2876 ◽  
Author(s):  
C. WOLFF
Keyword(s):  
Reaction Rate ◽  
Closed Loop ◽  
Dynamic Behaviour ◽  
Volume Flow ◽  
Hydraulic Systems ◽  
High Reaction ◽  
Er Fluids ◽  
High Reaction Rate

The results of the investigation regarding the suitability of ERF when applied in hydraulics have shown so far that constructing electrorheological flow resistors for the control of pressure and volume flow is possible in principle. One of the main advantages when using the ER-technology in hydraulic systems can be seen in the high reaction rate of the ER-effect. The investigations presented in this article document the dynamic qualities of ER-fluids by means of a practical exploitation for the control of a cylinder actuator. Due to the particular possibilities for design of ER-control resistors a compact cylinder has resulted which differs considerably from traditional cylinder actuators in its construction and dynamic behaviour.

scholarly journals Study on the correspondence of color change with polyenyl cation formation of cholesterol in strong acids.

1980 ◽  
Vol 28 (6) ◽  
pp. 1747-1761 ◽  
Author(s):  
TOKIHIRO NIIYA ◽  
YOSHINOBU GOTO ◽  
YUKIO ONO ◽  
YO UEDA
Keyword(s):  
Color Change ◽  
Strong Acids

scholarly journals Green synthesis of Au nanoparticles using an aqueous extract ofStachys lavandulifoliaand their catalytic performance for alkyne/aldehyde/amine A3coupling reactions

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38186-38195 ◽  
Author(s):  
Hojat Veisi ◽  
Maliheh Farokhi ◽  
Mona Hamelian ◽  
Saba Hemmati
Keyword(s):  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Aqueous Extract ◽  
Reaction Rate ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
High Reaction ◽  
High Reaction Rate

High reaction rate and easy availability make green synthesis of metal nanoparticles noticeable.

scholarly journals Modeling Fabric Movement for Future E-Textile Sensors

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3735
Author(s):  
Roope Ketola ◽  
Vigyanshu Mishra ◽  
Asimina Kiourti
Keyword(s):  
Three Dimensions ◽  
Dynamic Nature ◽  
Average Displacement ◽  
Sensing Applications ◽  
Textile Sensors ◽  
In The Wild ◽  
Textile Sensor ◽  
Joint Flexion ◽  
Optimal Type

Studies with e-textile sensors embedded in garments are typically performed on static and controlled phantom models that do not reflect the dynamic nature of wearables. Instead, our objective was to understand the noise e-textile sensors would experience during real-world scenarios. Three types of sleeves, made of loose, tight, and stretchy fabrics, were applied to a phantom arm, and the corresponding fabric movement was measured in three dimensions using physical markers and image-processing software. Our results showed that the stretchy fabrics allowed for the most consistent and predictable clothing-movement (average displacement of up to −2.3 ± 0.1 cm), followed by tight fabrics (up to −4.7 ± 0.2 cm), and loose fabrics (up to −3.6 ± 1.0 cm). In addition, the results demonstrated better performance of higher elasticity (average displacement of up to −2.3 ± 0.1 cm) over lower elasticity (average displacement of up to −3.8 ± 0.3 cm) stretchy fabrics. For a case study with an e-textile sensor that relies on wearable loops to monitor joint flexion, our modeling indicated errors as high as 65.7° for stretchy fabric with higher elasticity. The results from this study can (a) help quantify errors of e-textile sensors operating “in-the-wild,” (b) inform decisions regarding the optimal type of clothing-material used, and (c) ultimately empower studies on noise calibration for diverse e-textile sensing applications.

Catalytic antibody light chain capable of cleaving a chemokine receptor CCR-5 peptide with a high reaction rate constant

2004 ◽  
Vol 86 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Yukie Mitsuda ◽  
Emi Hifumi ◽  
Kumi Tsuruhata ◽  
Hiroko Fujinami ◽  
Naoki Yamamoto ◽  
...  
Keyword(s):  
Rate Constant ◽  
Chemokine Receptor ◽  
Light Chain ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Catalytic Antibody ◽  
High Reaction ◽  
High Reaction Rate

scholarly journals High NH3-SCR reaction rate with low dependence on O2 partial pressure over Al-rich Cu–*BEA zeolite

RSC Advances ◽  
2021 ◽  
Vol 11 (17) ◽  
pp. 10381-10384
Author(s):  
Yusuke Ohata ◽  
Takeshi Ohnishi ◽  
Takahiko Moteki ◽  
Masaru Ogura
Keyword(s):  
Partial Pressure ◽  
Reaction Rate ◽  
Reaction Condition ◽  
Bea Zeolite ◽  
Nh3 Scr ◽  
High Reaction ◽  
O2 Partial Pressure ◽  
Zeolite P ◽  
High Reaction Rate

It was revealed that Al-rich Cu–*BEA zeolite exhibit high reaction rate for NH3-SCR at 473 K in low PO2 reaction condition.

Comparative DFT dual gas adsorption model of ZnO and Ag/ZnO with experimental applications as gas detection at ppb level

2021 ◽  
Author(s):  
Utkarsh Kumar ◽  
Shih-Ming Huang ◽  
Zen-In Deng ◽  
Cheng-Xin Yang ◽  
Wen-Min Huang ◽  
...  
Keyword(s):  
Density Functional ◽  
Reaction Rate ◽  
Gas Adsorption ◽  
Gas Detection ◽  
Adsorption Model ◽  
Ag Nps ◽  
Functional Theory ◽  
Peak Intensity ◽  
Homo Lumo ◽  
Good Agreement

Abstract By experimental and density functional theory (DFT) calculations, the toxic gases (O3 and NO2) sensing capability and mechanism of ZnO NRs and Ag/ZnO NRs have been comparatively studied in this work. The arrays of Ag NPs were employed as a templet for the growth of ZnO NRs. The experimental results show the response and adsorption rate towards the gases obviously change after adding Ag NPs in ZnO. From the TDOS plot, it has been observed that the HOMO-LUMO gap changes after interaction with different oxidizing gases similarly the peak intensity also decreases which confirms the electron has been transferred from ZnO to NO2 and O3. The response towards the gases decreases and the adsorption reaction rate has been calculated by the Eyring-Polanyi equation and found to be increased after adding Ag in the ZnO NRs which is very similar to our experimental data. We also find that the absorption coefficient is different for O3 and NO2. The mechanism of the gas sensor was explored. Finally, the findings of the response experiment and theoretical calculation were compared and found to be in good agreement.

scholarly journals Fabrication of polyaniline coated conductive cotton for ammonia gas detection

2018 ◽  
Vol 192 ◽  
pp. 02036
Author(s):  
Mon Myat Swe ◽  
Tanthip Eamsa-ard ◽  
Teerakiat Kerdcharoen
Keyword(s):  
Gas Sensors ◽  
In Situ Polymerization ◽  
Optical Microscope ◽  
Gas Detection ◽  
Bending Test ◽  
Polymerization Process ◽  
Ammonia Gas ◽  
Smart Textile ◽  
Toxic Pollutant ◽  
Textile Sensor

Nowadays, ammonia becomes major toxic pollutant. The industrial zones, agricultural zones and mining zones are facing this problem all over the world. Ammonia gives irritating strong smell in the environment and it can affect on the health of human with a long exposure time. Moreover, ammonia is also the biomarker which can indicate the health status of human. For these situations, many ammonia gas sensors are produced. In this work, flexible ammonia gas sensor is prepared based on polyaniline through in-situ polymerization process. We developed a wearable smart textile sensor for ammonia gas detection. 100% cotton which does not irritate the wearer was used for this sensor. The polyaniline-cotton composite was characterized by optical microscope, SEM and FTIR spectroscopy. The morphology of the composites reveal PANI was successfully coated on the cotton. The sensitivity of the gas sensors was monitored directly increasing the concentration of ammonia gas. The resistance changes of the sensors can be seen with increasing the concentration. It could also be proved that the sensor is flexible with bending test. In the future, this flexible PANI-cotton composite sensor can be used for ammonia detection in real applications.

Sign in / Sign up

Export Citation Format

Share Document