Surface characterization of conductive lignocellulose composites
2016
Autori
Pantović Pavlović, MarijanaPavlović, Miroslav
Zarić, Milana
Panić, Vladimir
Stevanović, Jasmina
Pavlović, Miomir
Konferencijski prilog (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
This paper is concerned with surface characterization of composite materials based on lignocellulosic (LC) matrix filled with electrolytic copper powder and chemically obtained silver powder. Volume fractions of metal fillers in composite materials and tested samples were varied in the range of 1.6-29.8 % (v / v) . Characterization included examination of the influence of particle size and morphology on the conductivity and percolation threshold of the composites using IS and AFM. The packaging effect and more pronounced interpartical contact with dendritic copper powder particles lead to "movement" of percolation threshold , which for the particles < 45 μm and highest processing pressure of 27 MPa was 7.2 % (v / v). IS response of the composites showed existence of electrical conductive layers , each having different resistivity that increases towards interior of the composite.
AFM measurements (Figure 1) show the existence of silver and copper conductive pathways throughout the comp...osites volumes. Copper powder has more developed surface area than chemically obtained silver powder. Hence, the end of dendritic arms is more pronounced on the surface. This feature can be observed on Figure 1a, where roughness of the sample is greater than on Figure 1b. Figure 1b presents AFM image of the LC-Ag composite surface after breaking. Figure 2 presents Surface of LC matrix without the presence of conductive filler. It can be observed that the surface and its roughness differs from the composite ones. All of the conductive pathways are formed in 3D in a pure random order.
Ključne reči:
lignocellulosic (LC) matrix / copper powder / silver powderIzvor:
Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia, 2016, 243-243Izdavač:
- Skopje : Society of chemists and technologists of Macedonia
Finansiranje / projekti:
- Savremeni višekomponentni metalni sistemi i nanostrukturni materijali sa različitim funkcionalnim svojstvima (RS-MESTD-Basic Research (BR or ON)-172037)
- Elektrohemijska sinteza i karakterizacija nanostrukturiranih funkcionalnih materijala za primenu u novim tehnologijama (RS-MESTD-Basic Research (BR or ON)-172046)
Institucija/grupa
IHTMTY - CONF AU - Pantović Pavlović, Marijana AU - Pavlović, Miroslav AU - Zarić, Milana AU - Panić, Vladimir AU - Stevanović, Jasmina AU - Pavlović, Miomir PY - 2016 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6634 AB - This paper is concerned with surface characterization of composite materials based on lignocellulosic (LC) matrix filled with electrolytic copper powder and chemically obtained silver powder. Volume fractions of metal fillers in composite materials and tested samples were varied in the range of 1.6-29.8 % (v / v) . Characterization included examination of the influence of particle size and morphology on the conductivity and percolation threshold of the composites using IS and AFM. The packaging effect and more pronounced interpartical contact with dendritic copper powder particles lead to "movement" of percolation threshold , which for the particles < 45 μm and highest processing pressure of 27 MPa was 7.2 % (v / v). IS response of the composites showed existence of electrical conductive layers , each having different resistivity that increases towards interior of the composite. AFM measurements (Figure 1) show the existence of silver and copper conductive pathways throughout the composites volumes. Copper powder has more developed surface area than chemically obtained silver powder. Hence, the end of dendritic arms is more pronounced on the surface. This feature can be observed on Figure 1a, where roughness of the sample is greater than on Figure 1b. Figure 1b presents AFM image of the LC-Ag composite surface after breaking. Figure 2 presents Surface of LC matrix without the presence of conductive filler. It can be observed that the surface and its roughness differs from the composite ones. All of the conductive pathways are formed in 3D in a pure random order. PB - Skopje : Society of chemists and technologists of Macedonia C3 - Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia T1 - Surface characterization of conductive lignocellulose composites SP - 243 EP - 243 UR - https://hdl.handle.net/21.15107/rcub_cer_6634 ER -
@conference{ author = "Pantović Pavlović, Marijana and Pavlović, Miroslav and Zarić, Milana and Panić, Vladimir and Stevanović, Jasmina and Pavlović, Miomir", year = "2016", abstract = "This paper is concerned with surface characterization of composite materials based on lignocellulosic (LC) matrix filled with electrolytic copper powder and chemically obtained silver powder. Volume fractions of metal fillers in composite materials and tested samples were varied in the range of 1.6-29.8 % (v / v) . Characterization included examination of the influence of particle size and morphology on the conductivity and percolation threshold of the composites using IS and AFM. The packaging effect and more pronounced interpartical contact with dendritic copper powder particles lead to "movement" of percolation threshold , which for the particles < 45 μm and highest processing pressure of 27 MPa was 7.2 % (v / v). IS response of the composites showed existence of electrical conductive layers , each having different resistivity that increases towards interior of the composite. AFM measurements (Figure 1) show the existence of silver and copper conductive pathways throughout the composites volumes. Copper powder has more developed surface area than chemically obtained silver powder. Hence, the end of dendritic arms is more pronounced on the surface. This feature can be observed on Figure 1a, where roughness of the sample is greater than on Figure 1b. Figure 1b presents AFM image of the LC-Ag composite surface after breaking. Figure 2 presents Surface of LC matrix without the presence of conductive filler. It can be observed that the surface and its roughness differs from the composite ones. All of the conductive pathways are formed in 3D in a pure random order.", publisher = "Skopje : Society of chemists and technologists of Macedonia", journal = "Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia", title = "Surface characterization of conductive lignocellulose composites", pages = "243-243", url = "https://hdl.handle.net/21.15107/rcub_cer_6634" }
Pantović Pavlović, M., Pavlović, M., Zarić, M., Panić, V., Stevanović, J.,& Pavlović, M.. (2016). Surface characterization of conductive lignocellulose composites. in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia Skopje : Society of chemists and technologists of Macedonia., 243-243. https://hdl.handle.net/21.15107/rcub_cer_6634
Pantović Pavlović M, Pavlović M, Zarić M, Panić V, Stevanović J, Pavlović M. Surface characterization of conductive lignocellulose composites. in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia. 2016;:243-243. https://hdl.handle.net/21.15107/rcub_cer_6634 .
Pantović Pavlović, Marijana, Pavlović, Miroslav, Zarić, Milana, Panić, Vladimir, Stevanović, Jasmina, Pavlović, Miomir, "Surface characterization of conductive lignocellulose composites" in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia (2016):243-243, https://hdl.handle.net/21.15107/rcub_cer_6634 .