Preparation of purified spent coffee ground and its reinforcement in natural rubber composite
Spent coffee ground (SCG) contains a variety of organic compounds such as fatty acids, amino acids, polyphenols, polysaccharides, etc. In this study, purification of SCG was carried out by alkalization and bleaching treatment and the purified SCG (PSCG) was characterized by various techniques, i.e.,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535222002337 |
| _version_ | 1811255835547926528 |
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| author | Peerayut Tapangnoi Pongdhorn Sae-Oui Weerawut Naebpetch Chomsri Siriwong |
| author_facet | Peerayut Tapangnoi Pongdhorn Sae-Oui Weerawut Naebpetch Chomsri Siriwong |
| author_sort | Peerayut Tapangnoi |
| collection | DOAJ |
| description | Spent coffee ground (SCG) contains a variety of organic compounds such as fatty acids, amino acids, polyphenols, polysaccharides, etc. In this study, purification of SCG was carried out by alkalization and bleaching treatment and the purified SCG (PSCG) was characterized by various techniques, i.e., FTIR, XRD, BET, SEM and TGA. PSCG was later treated with Bis-triethoxysilylpropyl tetrasulfide (TESPT). Both PSCG and TESPT-treated PSCG were then incorporated into natural rubber (NR) to investigate their reinforcement magnitude in the bio-composite. Results revealed the eradication of lignin and other non-polysaccharide components after the purification leading to the significant increases in specific surface area and cellulose content of PSCG. Although the addition of PSCG into NR showed cure time reduction in association with the increased modulus and hardness, its reinforcement was not very high due to the large particle size and the abundance of hydroxyl groups in PSCG. The TESPT treatment significantly improved the reinforcement of PSCG due to the increases in rubber-filler interaction and crosslink density. However, the reinforcement of both PSCG and TESPT-treated PSCG is still relatively low compared to the commercial nanofillers and, thus, they can be considered as a cheap and eco-friendly filler in NR. |
| first_indexed | 2024-04-12T17:29:57Z |
| format | Article |
| id | doaj.art-34c3620d0ffe411c80eeaadbae1ecf47 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-12T17:29:57Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-34c3620d0ffe411c80eeaadbae1ecf472022-12-22T03:23:09ZengElsevierArabian Journal of Chemistry1878-53522022-07-01157103917Preparation of purified spent coffee ground and its reinforcement in natural rubber compositePeerayut Tapangnoi0Pongdhorn Sae-Oui1Weerawut Naebpetch2Chomsri Siriwong3Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, ThailandNational Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, ThailandCenter of Rubber Technology for Community, Faculty of Engineering, Thaksin University, Phatthalung campus, Phatthalung 93210, ThailandMaterials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; Corresponding author.Spent coffee ground (SCG) contains a variety of organic compounds such as fatty acids, amino acids, polyphenols, polysaccharides, etc. In this study, purification of SCG was carried out by alkalization and bleaching treatment and the purified SCG (PSCG) was characterized by various techniques, i.e., FTIR, XRD, BET, SEM and TGA. PSCG was later treated with Bis-triethoxysilylpropyl tetrasulfide (TESPT). Both PSCG and TESPT-treated PSCG were then incorporated into natural rubber (NR) to investigate their reinforcement magnitude in the bio-composite. Results revealed the eradication of lignin and other non-polysaccharide components after the purification leading to the significant increases in specific surface area and cellulose content of PSCG. Although the addition of PSCG into NR showed cure time reduction in association with the increased modulus and hardness, its reinforcement was not very high due to the large particle size and the abundance of hydroxyl groups in PSCG. The TESPT treatment significantly improved the reinforcement of PSCG due to the increases in rubber-filler interaction and crosslink density. However, the reinforcement of both PSCG and TESPT-treated PSCG is still relatively low compared to the commercial nanofillers and, thus, they can be considered as a cheap and eco-friendly filler in NR.http://www.sciencedirect.com/science/article/pii/S1878535222002337Spent coffee groundNatural rubberEco-friendly fillerPurificationMechanical propertiesSurface modification |
| spellingShingle | Peerayut Tapangnoi Pongdhorn Sae-Oui Weerawut Naebpetch Chomsri Siriwong Preparation of purified spent coffee ground and its reinforcement in natural rubber composite Arabian Journal of Chemistry Spent coffee ground Natural rubber Eco-friendly filler Purification Mechanical properties Surface modification |
| title | Preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| title_full | Preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| title_fullStr | Preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| title_full_unstemmed | Preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| title_short | Preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| title_sort | preparation of purified spent coffee ground and its reinforcement in natural rubber composite |
| topic | Spent coffee ground Natural rubber Eco-friendly filler Purification Mechanical properties Surface modification |
| url | http://www.sciencedirect.com/science/article/pii/S1878535222002337 |
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