Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose
2016
Аутори
Stevanović, JasminaPavlović, Miroslav
Pantović Pavlović, Marijana
Zarić, Milana
Pavlović, Miomir
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Composites based on natural polymers with conductive fillers have been gaining more and more significant roles in a variety of technological domains. These polymers with addition of electrochemically obtained conductive materials can be directly used as contemporary materials. This article is concerned with the preparation and characterization of the basic components: electrodeposited copper powder and lignocellulose ( LC ) as well as composite materials prepared by the compression molding of LC and galvanostatically obtained copper powder mixtures. Analysis of the most significant properties of individual components and prepared composites included quantitative structural analysis, morphological analysis, determination of density and porosity and measurements of electrical conductivity. Different investigation techniques including SEM, TGA, DSC, X-ray, FTIR, particle size distribution and conductivity
measurements were used.
Results have shown that the powder has very high surface a...rea and it has pronounced dendrite branching with well-developed primary and secondary dendrite arms. The conductivity measurements showed S-shaped dependency with percolation transition from non-conductive to conductive region, typical for such polymer composite materials. The electrical conductivity of the composites is < 10-15 MS/m unless the metal content reaches the percolation threshold of 14.4% ( v/v ), beyond which the conductivity increases markedly by as much as 14 orders of magnitude. It was found that this transition occurs at lower volume fractions than stated in the literature, which can be due to the filler with high specific area. This research has undoubtedly shown that galvanostatically obtained copper powder plays significant role with its indented area in formation of greater number of contacts with smaller volume fractions. In this manner the value of percolation threshold is lowered.
Кључне речи:
copper powder / lignocellulose / composite materials / electrical conductivityИзвор:
Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia, 2016, 249-249Издавач:
- Skopje : Society of chemists and technologists of Macedonia
Финансирање / пројекти:
- Савремени вишекомпонентни метални системи и наноструктурни материјали са различитим функционалним својствима (RS-MESTD-Basic Research (BR or ON)-172037)
- Електрохемијска синтеза и карактеризација наноструктурираних функционалних материјала за примену у новим технологијама (RS-MESTD-Basic Research (BR or ON)-172046)
Институција/група
IHTMTY - CONF AU - Stevanović, Jasmina AU - Pavlović, Miroslav AU - Pantović Pavlović, Marijana AU - Zarić, Milana AU - Pavlović, Miomir PY - 2016 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6649 AB - Composites based on natural polymers with conductive fillers have been gaining more and more significant roles in a variety of technological domains. These polymers with addition of electrochemically obtained conductive materials can be directly used as contemporary materials. This article is concerned with the preparation and characterization of the basic components: electrodeposited copper powder and lignocellulose ( LC ) as well as composite materials prepared by the compression molding of LC and galvanostatically obtained copper powder mixtures. Analysis of the most significant properties of individual components and prepared composites included quantitative structural analysis, morphological analysis, determination of density and porosity and measurements of electrical conductivity. Different investigation techniques including SEM, TGA, DSC, X-ray, FTIR, particle size distribution and conductivity measurements were used. Results have shown that the powder has very high surface area and it has pronounced dendrite branching with well-developed primary and secondary dendrite arms. The conductivity measurements showed S-shaped dependency with percolation transition from non-conductive to conductive region, typical for such polymer composite materials. The electrical conductivity of the composites is < 10-15 MS/m unless the metal content reaches the percolation threshold of 14.4% ( v/v ), beyond which the conductivity increases markedly by as much as 14 orders of magnitude. It was found that this transition occurs at lower volume fractions than stated in the literature, which can be due to the filler with high specific area. This research has undoubtedly shown that galvanostatically obtained copper powder plays significant role with its indented area in formation of greater number of contacts with smaller volume fractions. In this manner the value of percolation threshold is lowered. 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 - Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose SP - 249 EP - 249 UR - https://hdl.handle.net/21.15107/rcub_cer_6649 ER -
@conference{ author = "Stevanović, Jasmina and Pavlović, Miroslav and Pantović Pavlović, Marijana and Zarić, Milana and Pavlović, Miomir", year = "2016", abstract = "Composites based on natural polymers with conductive fillers have been gaining more and more significant roles in a variety of technological domains. These polymers with addition of electrochemically obtained conductive materials can be directly used as contemporary materials. This article is concerned with the preparation and characterization of the basic components: electrodeposited copper powder and lignocellulose ( LC ) as well as composite materials prepared by the compression molding of LC and galvanostatically obtained copper powder mixtures. Analysis of the most significant properties of individual components and prepared composites included quantitative structural analysis, morphological analysis, determination of density and porosity and measurements of electrical conductivity. Different investigation techniques including SEM, TGA, DSC, X-ray, FTIR, particle size distribution and conductivity measurements were used. Results have shown that the powder has very high surface area and it has pronounced dendrite branching with well-developed primary and secondary dendrite arms. The conductivity measurements showed S-shaped dependency with percolation transition from non-conductive to conductive region, typical for such polymer composite materials. The electrical conductivity of the composites is < 10-15 MS/m unless the metal content reaches the percolation threshold of 14.4% ( v/v ), beyond which the conductivity increases markedly by as much as 14 orders of magnitude. It was found that this transition occurs at lower volume fractions than stated in the literature, which can be due to the filler with high specific area. This research has undoubtedly shown that galvanostatically obtained copper powder plays significant role with its indented area in formation of greater number of contacts with smaller volume fractions. In this manner the value of percolation threshold is lowered.", 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 = "Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose", pages = "249-249", url = "https://hdl.handle.net/21.15107/rcub_cer_6649" }
Stevanović, J., Pavlović, M., Pantović Pavlović, M., Zarić, M.,& Pavlović, M.. (2016). Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose. 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., 249-249. https://hdl.handle.net/21.15107/rcub_cer_6649
Stevanović J, Pavlović M, Pantović Pavlović M, Zarić M, Pavlović M. Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose. in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia. 2016;:249-249. https://hdl.handle.net/21.15107/rcub_cer_6649 .
Stevanović, Jasmina, Pavlović, Miroslav, Pantović Pavlović, Marijana, Zarić, Milana, Pavlović, Miomir, "Electrical conductivity of biodegradable composites based on electrodeposited Cu powders and lignocellulose" in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia (2016):249-249, https://hdl.handle.net/21.15107/rcub_cer_6649 .