Investigation of electrical properties of hybrid nanocomposites containing different fillers on pressure sensor applications under different loading

Abstract

Conductive elastomeric nanocomposites (CEMs) were prepared in two stages to control the precision of pressure sensors. Carbon-based nanofillers such as multi-walled carbon nanotubes (MWCNT) or graphene (GR) were added to the rubber matrix. For Rubber/MWCNT composites, unfunctionalized (U-MWCNT) and –COOH functionalized MWCNT (F-MWCNT) fillers were synthesized. The properties of the CEMs and the synergistic improvements between the fillers and rubber matrix in composites were also investigated. SEM images show that F-MWCNT fillers were dispersed homogeneously in the composites and they interacted with rubber better than other carbon fillers. The piezoresistivity properties of the CEMs before and after compression were determined using the four-probe method by cyclic loading in 1 mm increments between 1.5 mm and 3.5 mm. F-MWCNT filled composites had higher strength than others when they were compressed by 2.5 mm. The F-MWCNT and GR filled nanocomposites possessed the best resistivity for pressure sensors when compressed at 2.5 mm (for F-MWCNT 1.1E + 08 Ω, GR 5.28E + 06 Ω). These nanocomposites are promising pressures sensors for air suspension systems.

Resistance sensing response optimization and interval loading continuity of multiwalled carbon nanotube/natural rubber composites: Experiment and simulation

“…The strong tendency of CNTs to agglomerate reduces the effective surface area of interaction with the rubber chains and the shape factor of these nanofillers, while leading to the development of crack initiation and propagation resistance 10,12 . Furthermore, the functionalization of MWCNTs also plays a positive role in the reinforcement of mechanical properties and dispersion of composites 13,14 . At the same time, the stability and repeatability of the sensing response of the composite are improved.…”

“…At the same time, the stability and repeatability of the sensing response of the composite are improved. Unfortunately, the conductivity of the composite is reduced due to the formation of higher resistance values 14,15 . Unfunctionalized MWCNTs have significant resistance response fluctuations, but they are economical and simple conductive fillers 15 .…”

“…10,12 Furthermore, the functionalization of MWCNTs also plays a positive role in the reinforcement of mechanical properties and dispersion of composites. 13,14 At the same time, the stability and repeatability of the sensing response of the composite are improved. Unfortunately, the conductivity of the composite is reduced due to the formation of higher resistance values.…”

Ballistic performance of composite structure configurations with high elongation calendered rubber layer laminated to AA5083-H112 aluminum alloy

“…2,[13][14][15] The polymer type, fillers, zinc oxide, stearic acid, crosslinker sulfur, vulcanizers, and other chemicals that form the vulcanization system are added to the formulations prepared to transform rubbers into composite mixtures with the desired properties. 13,[16][17][18][19] Liaghat et al 13 prepared two types of rubber panels with different mixture formulations and examined the amount of filler's ballistic performance and energy absorption properties. They also examined the effects of bullet diameter on the ballistic boundary and damage area.…”

Mechanical and electrical characterization of elastomer based pressure sensors containing graphene filler material under cycled load.

“…Grafen malzemelerin sp 2 yapısı (Sp 2 structure of graphene materials) Kasım vd., Hava süspansiyon sistemlerinde kullanılmak amacıyla basınç sensorlerinde kullanılabilecek iletken nanokompozit malzemeler tasarlamışlardır. Karbon bazlı 3 farklı malzeme hazırlayarak kuvvet altında belirli miktarlarda sıkıştırarak dirençlerini hesaplamış ve GrF içeren malzemenin 2,5 mm sıkıştırmada 5,6 bar basınç uygulama sonucunda yüksek dirence (5,28E+06 Ω) sahip olduğunu gözlemlemişlerdir [18]. Bu çalışmada, yüksek hassasiyetli PgS elde etmek için yeni bir proses sonucunda GrF içeren doğal elastomer bazlı nanokompozit hazırlanmıştır.…”