Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes
Abstract: Background: The addition of nanoparticles to cellulose paper can improve its mechanical strength, chemical stability, biocompatibility and hydrophobic properties. Silica nanoparticles are known to be inert, hydrophobic, biocompatible, biodegradable and have a good distribution being deposi...
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| Format: | Article |
| Language: | English |
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Bentham Science Publishers
2019
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| Online Access: | http://eprints.uanl.mx/27344/1/254.pdf |
| _version_ | 1824420715776966656 |
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| author | Alanís, Antonio Kharissova, Oxana Vasilievna Kharisov, Boris I. |
| author_facet | Alanís, Antonio Kharissova, Oxana Vasilievna Kharisov, Boris I. |
| author_sort | Alanís, Antonio |
| collection | Repositorio Institucional |
| description | Abstract: Background: The addition of nanoparticles to cellulose paper can improve its mechanical strength, chemical stability, biocompatibility and hydrophobic properties. Silica nanoparticles are known to be inert, hydrophobic, biocompatible, biodegradable and have a good distribution being deposited on surfaces. The main characteristics of 20 nm SiO2 nanoparticles are good chemical and thermal stability with a melting point of 1610-1728°C, a boiling point of 2230°C with a purity of 99.5%.
Objective: To carry out the hydrophobization of paper based on Kraft cellulose and on cellulose obtained from soybean husk with 20-nm size SiO2 nanoparticles and to study hydrophobicity, morphology and topography of the prepared composites.
Methods: The ground and roasted soybean husk was treated with a NaOH, washed and dried. Hydrophobization of paper was carried in aqueous medium by SiO2 addition in weight ratios “paper-SiO2 ” of 0.01-0.05 wt.%, stirring, filtration and drying. The obtained cellulose sheet composites were characterized by scanning electron microscopy (SEM), transmisión electron microscopy (TEM), FTIRspectroscopy, Mullen proofs of hydrophobicity, and contact angle measurements.
Results: The mechanical properties of paper nanocomposites (tensile strength and compression) increased considerably by varying the concentrations. The tensile strength increased by 41-46% and the compressive strength increased by 55-56%. The existence of fiber nanofoils, good adhesion of 20-nm SiO2 nanoparticles to the paper surface, and their homogeneous distribution were observed.
Conclusion: Cellulose was successfully obtained from soybean husk, applying the alkaline-based extraction method. A good reinforcement of cellulose fibers is observed due to the outstanding characteristics of the silicon dioxide nanoparticles. |
| format | Article |
| id | eprints-27344 |
| institution | UANL |
| language | English |
| publishDate | 2019 |
| publisher | Bentham Science Publishers |
| record_format | eprints |
| spelling | eprints-273442024-10-18T18:45:56Z http://eprints.uanl.mx/27344/ Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes Alanís, Antonio Kharissova, Oxana Vasilievna Kharisov, Boris I. QC Física Abstract: Background: The addition of nanoparticles to cellulose paper can improve its mechanical strength, chemical stability, biocompatibility and hydrophobic properties. Silica nanoparticles are known to be inert, hydrophobic, biocompatible, biodegradable and have a good distribution being deposited on surfaces. The main characteristics of 20 nm SiO2 nanoparticles are good chemical and thermal stability with a melting point of 1610-1728°C, a boiling point of 2230°C with a purity of 99.5%. Objective: To carry out the hydrophobization of paper based on Kraft cellulose and on cellulose obtained from soybean husk with 20-nm size SiO2 nanoparticles and to study hydrophobicity, morphology and topography of the prepared composites. Methods: The ground and roasted soybean husk was treated with a NaOH, washed and dried. Hydrophobization of paper was carried in aqueous medium by SiO2 addition in weight ratios “paper-SiO2 ” of 0.01-0.05 wt.%, stirring, filtration and drying. The obtained cellulose sheet composites were characterized by scanning electron microscopy (SEM), transmisión electron microscopy (TEM), FTIRspectroscopy, Mullen proofs of hydrophobicity, and contact angle measurements. Results: The mechanical properties of paper nanocomposites (tensile strength and compression) increased considerably by varying the concentrations. The tensile strength increased by 41-46% and the compressive strength increased by 55-56%. The existence of fiber nanofoils, good adhesion of 20-nm SiO2 nanoparticles to the paper surface, and their homogeneous distribution were observed. Conclusion: Cellulose was successfully obtained from soybean husk, applying the alkaline-based extraction method. A good reinforcement of cellulose fibers is observed due to the outstanding characteristics of the silicon dioxide nanoparticles. Bentham Science Publishers 2019 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/27344/1/254.pdf http://eprints.uanl.mx/27344/1.haspreviewThumbnailVersion/254.pdf Alanís, Antonio y Kharissova, Oxana Vasilievna y Kharisov, Boris I. (2019) Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes. Recent Patents on Nanotechnology, 13. pp. 1-10. ISSN 1872-2105 http://doi.org/10.2174/1872210513666190703120844 doi:10.2174/1872210513666190703120844 |
| spellingShingle | QC Física Alanís, Antonio Kharissova, Oxana Vasilievna Kharisov, Boris I. Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| title_full | Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| title_fullStr | Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| title_full_unstemmed | Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| title_short | Metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| title_sort | metal phthalocyanines as catalyst precursors of metallated carbon nanotubes |
| topic | QC Física |
| url | http://eprints.uanl.mx/27344/1/254.pdf |
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