Enhancement in electrical conductive property of polypyrrole‐coated cotton fabrics using cationic surfactant

Abstract

Recently, great efforts have been made to gain highly conductive fabrics for smart textiles and flexible electromagnetic shielding materials. Different from the conventional chemical synthesis method, fibrillar polypyrrole was synthesized on the cotton fabrics via a simple chemical polymerization process with micelles of cationic surfactant (cetyltrimethylammonium bromide, CTAB) as soft template. The modified cotton fabric exhibited excellent electrical conductivity and electromagnetic interference shielding effectiveness due to the formation of fibrillar polypyrrole on the fiber surface. Electrical conductivity of fabric surface were studied by four-probe resistivity system. The highly conductive fabric with surface conductivity of 5.8 S cm 21 could be obtained by changing cationic surfactant concentration. The electromagnetic interference shielding effectiveness (EMI SE) of the modified fabrics was evaluated by the vector network analyzer instrument. Compared with the sample without using surfactant, the EMI SE value of PPy-coated cotton fabrics increased by 28% after using 0.03 M CTAB as soft template.

Preparation and investigation of moisture transfer and electromagnetic shielding properties of double-layer electromagnetic shielding fabrics

“…Therefore, it is difficult to meet the complex requirements in the new EM environment using only metal composite fabric as EM shielding material. Polypyrrole (PPy) is a kind of intrinsic conducting polymers and exhibits great EM absorption property [14][15][16][17]. Conjugated polymers electric dipoles present in the shield destroy the electric field of the EM waves by converting it as heat.…”

Effect of cotton fabric properties on fiber release and marine biodegradation

“…The L&W fiber tester measured the L F and W F in real time to calculate their averages and distributions. 25…”

Textile-Based, Interdigital, Capacitive, Soft-Strain Sensor for Wearable Applications

“…Coating with conductive polymers and conductive polymer composites could be considered as a first method [ 17 , 18 , 19 , 20 ]. However, some previous studies showed that fabrics became stiffer in proportion to the increased level of conductive polymer application, due to the relatively high stiffness of the conductive polymer compared to the fabric structure [ 21 ]. Delamination of conductive materials from the fabric structure under repetitive loading conditions is also a critical problem for this type of sensor.…”