Preparation and tensile conductivity of carbon nanotube/polyurethane nanofiber conductive films based on the centrifugal spinning method

2021 ◽  
Author(s):  
Luo wei ◽  
Mei Shunqi ◽  
Liu Teng ◽  
Yang Liye ◽  
Fan Lingling
Keyword(s):  
Wrist Joint ◽  
Flexible Substrate ◽  
Research Area ◽  
Conductive Films ◽  
Conductive Film ◽  
Centrifugal Spinning ◽  
The Matrix ◽  
Human Joints ◽  
Human Finger ◽  
Conductive Thin Films

Abstract Flexible conductive thin films have recently become a research area of focus in both academia and industry. In this study, a method of preparing nanofiber conductive films by centrifugal spinning is proposed. Polyurethane (PU) nanofiber films were prepared by centrifugal spinning as the flexible substrate film, and carbon nanotubes (CNTs) were used as the conducting medium, to obtain CNTs/PU nanofiber conductive films with good conductivity and elasticity. The effects of different CNT concentrations on the properties of the nanofiber films were investigated. It was found that the conductivity of the nanofiber conductive films was optimal when an impregnation concentration of 9% CNTs was used in the stretching process. Cyclic tensile resistance tests showed that the nanofiber conductive films have good durability and repeatability. Physical and structural property analysis of the CNT/PU conductive films indicate that the adsorption of the CNTs on the PU surface was successful and the CNTs were evenly dispersed on the surface of the matrix. Moreover, the CNTs improved the thermal stability of the PU membrane. The CNT/PU conductive films were pasted onto a human finger joint, wrist joint, and Adam's apple to test the detection of movement. The results showed that finger bending, wrist bending, and laryngeal prominence movement all caused a change in resistance of the conductive film, with an approximately linear curve. The results indicate that the CNT/PU nanofiber conductive film developed in this study can be used to test the motion of human joints.

Preparation and Performance Research of Highly Homogeneous Silver Nanowire Transparent Conductive Films on the Flexible Substrate

2018 ◽  
Vol 47 (11) ◽  
pp. 1131002
Author(s):  
胥靖 XU Jing ◽  
杨健君 YANG Jian-jun ◽  
钟建 ZHONG Jian ◽  
曾维 ZENG Wei ◽  
杨凯强 YANG Kai-qiang
Keyword(s):  
Flexible Substrate ◽  
Silver Nanowire ◽  
Transparent Conductive Films ◽  
Conductive Films ◽  
And Performance ◽  
Performance Research

Optical and electrical properties and simulation curves of NiO/Al/NiO transparent conductive film

2019 ◽  
Vol 33 (01) ◽  
pp. 1850417 ◽  
Author(s):  
Shuyun Wang ◽  
Kailin Wen ◽  
Yang Sun ◽  
Xianwu Xiu ◽  
Shuyun Teng ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Metal Film ◽  
Room Temperature ◽  
Optical And Electrical Properties ◽  
Light Wavelength ◽  
Conductive Films ◽  
Conductive Film ◽  
Average Transmittance ◽  
Interface Characteristics ◽  
Experimental Data Analysis

In this paper, NiO/Al/NiO transparent conductive films were prepared by magnetron sputtering at the room temperature. Effects of the NiO and Al layers thicknesses on the optical and electrical properties of the NiO/Al/NiO laminated films were analyzed. When the light wavelength falls in range 300–900 nm, with the increase of the NiO and Al layers thicknesses, the transmittance of the laminated film first increases significantly and then decreases slightly, finally tends to be stable. The laminated film obtained the best optical and electrical properties when the NiO layer is 40 nm and the Al layer is 12 nm. The maximum transmittance is 83%, the average transmittance is 77.3%, the film resistivity is [Formula: see text] and the carrier concentration is [Formula: see text]. At the same time, the transmittance of laminated film is simulated by FDTD software. But the simulation curve is different from the experimental data. Analysis results show that, with the NiO dielectric is added on both sides of the metal Al film, the light reflection characteristic of laminated film has been completely different from that of the single Al metal film because of the change of interface characteristics between Al film and NiO film, and the actual luminous transmittance greatly increases.

Molybdenum and tungsten doped SnO2 transparent conductive thin films with broadband high transmittance between the visible and near-infrared regions

CrystEngComm ◽  
2017 ◽  
Vol 19 (30) ◽  
pp. 4413-4423 ◽  
Author(s):  
Xinxin Huo ◽  
Shenglin Jiang ◽  
Pin Liu ◽  
Meng Shen ◽  
Shiyong Qiu ◽  
...  
Keyword(s):  
Thin Films ◽  
Near Infrared ◽  
Transparent Conductive Films ◽  
Conductive Films ◽  
Conductive Thin Films ◽  
And Tungsten

We demonstrate an approach for the synthesis of SnO2 transparent conductive films with low square resistance and high transmittance over the visible and NIR regions via doping of molybdenum and tungsten.

scholarly journals Influence of Evaporation-Deposition Geometry on Conductive Thin Films

1980 ◽  
Vol 7 (1-3) ◽  
pp. 171-179
Author(s):  
J. Griessing
Keyword(s):  
Thin Films ◽  
Angular Distribution ◽  
Cu Films ◽  
Term Stability ◽  
Long Term Stability ◽  
Conductive Films ◽  
Conductive Thin Films

There is a striking dependence of the evaporation deposition geometry (i.e. angular distribution of the incident vapor beam) on the properties of deposited conductive films. This paper discusses solderability, adhesion and long-term stability of adhesion of Ti-Pd-Au, Ti-Au and Ti-Cu films. In all cases the above properties were improved by an evaporation deposition geometry with steep angles of the incident vapor beam.

A low-cost, highly-conductive polyvinyl alcohol flexible film with Ag-microsheets and AgNWs as fillers

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 80905-80909 ◽  
Author(s):  
Yongyun Mao ◽  
Junmei Guo ◽  
Changyi Hu ◽  
Hongwei Yang ◽  
Yuwen Yang ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Low Cost ◽  
High Conductivity ◽  
Conductive Films ◽  
Flexible Film ◽  
Conductive Film ◽  
Ag Nanowires

Low-cost, high-conductivity flexible conductive films were fabricated using Ag-microsheets, Ag-nanowires (AgNWs) and polyvinyl alcohol (PVA) as conducting agents. The flexible conductive film shows good conductivity under stretching.

scholarly journals Fibers and Conductive Films Using Silver Nanoparticles and Nanowires by Near-Field Electrospinning Process

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Cheng-Tang Pan ◽  
Tsung-Lin Yang ◽  
Yi-Chian Chen ◽  
Cherng-Yuh Su ◽  
Shin-Pon Ju ◽  
...  
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
Sheet Resistance ◽  
Silver Nanowires ◽  
Near Field ◽  
Electrospinning Process ◽  
Conductive Films ◽  
Conductive Film ◽  
The Future ◽  
Transparent Conductive Electrodes

The silver nanowires (AgNWs) and silver nanoparticles (AgNPs) were synthesized. With near-field electrospinning (NFES) process, fibers and thin films with AgNPs and AgNWs were fabricated. In the NFES process, 10 k voltage was applied and the AgNPs and AgNWs fibers can be directly orderly collected without breaking and bending. Then, the characteristics of the fibers were analyzed by four-point probe and EDS. The conductive film was analyzed. When the thickness of films with AgNWs and AgNPs was 1.6 µm, the sheet resistance of films was 0.032 Ω/sq which was superior to that of the commercial ITO. The transmissivity of films was analyzed. The transmissivity was inversely proportional to sheet resistance of the films. In the future, the fibers and films can be used as transparent conductive electrodes.

scholarly journals Formation of a conductive overcoating layer based on hybrid composites to improve the stability of flexible transparent conductive films

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4428-4434 ◽  
Author(s):  
Jin-geun Lee ◽  
Wonseok Cho ◽  
Youngno Kim ◽  
Hangyeol Cho ◽  
Hongjoo Lee ◽  
...  
Keyword(s):  
Hybrid Composites ◽  
Protective Layer ◽  
Silica Sol ◽  
Organic Polymer ◽  
Transparent Conductive Film ◽  
Transparent Conductive Films ◽  
Conductive Films ◽  
Conductive Film ◽  
The Stability

A protective layer that can be applied on a flat flexible transparent conductive film was prepared by combining silica sol and organic polymer.

Development of a revolute-type kinematic model for human upper limb using a matrix approach

Robotica ◽  
2021 ◽  
pp. 1-22
Author(s):  
Anil Kumar Gillawat
Keyword(s):  
Mathematical Model ◽  
Upper Limb ◽  
Wrist Joint ◽  
Kinematic Model ◽  
Matrix Approach ◽  
Joint Torques ◽  
The Matrix ◽  
Distal Interphalangeal ◽  
Forward Kinematic ◽  
Human Upper Limb

Abstract A mathematical model is proposed for a revolute joint mechanism with an n-degree of freedom (DOF). The matrix approach is used for finding the relation between two consecutive links to determine desired link parameters such as position, velocity and acceleration using the forward kinematic approach. The matrix approach was confirmed for a proposed 10 DOF revolute type (R-type) human upper limb model with servo motors at each joint. Two DOFs are considered each at shoulder, elbow and wrist joint, followed by four DOF for the fingers. Two DOFs were considered for metacarpophalangeal (mcp) and one DOF each for proximal interphalangeal (pip) and distal interphalangeal (dip) joints. MATLAB script function was used to evaluate the mathematical model for determining kinematic parameters for all the proposed human upper limb model joints. The simplified method for kinematic analysis proposed in this paper will further simplify the dynamic modeling of any mechanism for determining joint torques and hence, easy to design control system for joint movements.

Sign in / Sign up

Export Citation Format

Share Document