The Effect of Polyaniline on Resistivity of Conducting Adhesives Containing Silver-Plated Particles
Date Issued
2007
Date
2007
Author(s)
Lan, Ying-Cheng
DOI
zh-TW
Abstract
The thesis was divided into three parts. The first part of study was preparing polyaniline. The second part of study was preparing conductive particles. The third part of study was preparing electrically conductive adhesives (ECAs). In the experiments, we measured the molecular weight of polyaniline by GPC and polyaniline was characterized by ultraviolet-visible spectroscopy. We observed particle size and surface morphology by particle size instrument and SEM. We also analyzed if silver was electroless plated on particles surface and plated weight by XRD and ICP.
In the study of preparing polyaniline, we synthesize it at 0°C. We find its molecular weight is 3756. UV–vis spectra of the emeraldine form of polyanoline shows two peaks, 320nm and 640nm.They are the characteristic peaks of he emeraldine form of PANI. After we synthesize the emeraldine form of polyaniline, we dope it by using different doping acids(HCl、HBr、HNO3、H3PO4、DBSA) and then we solve it in DMSO to measure its conductivity and solubility.
In the study of preparing conductive particles, we take the 0.982 μm flake graphite(GS-75) and the 4.292 μm flake graphite(GP-44) to plate silver electroless. We can find there are Ag and Ag2O on GS-75/Ag and GP-44/Ag particles surface by XRD. We also find small particle graphite (GS-75) electroless plated more silver weight than big particle graphite (GP-44),because the specific surface area of small particle graphite (GS-75) was bigger.
In the study of preparing electrically conductive adhesives, we can find resistivity ρ must decline after electroless plating silver. We also find resistivity ρ must decline after adding polyaniline solution, so resistivity ρ of ECAs of particles GS-75、 GP-44 decline about three order after plating silver and adding polyaniline solution.
The best cruing temperature of ECAs was 200°C. In this thesis, the best resistivity ρ of ECAs was 0.000421 ohm-cm, and it was the ECAs of GS-75/Ag cured at 200°C.
Subjects
聚苯胺
無電鍍銀
導電膠
polyaniline
electroless plating
conductive adhesive
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94549030-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):c5939494ebc174a4655be801cd3092eb