| YANG Ke-qing,ZHU Yu,ZHAO Yi-yang,YANG Jing-long,CHEN Zong-ju,ZHANG Xiu-cheng.Preparation and Properties of Surface Modified Cellulose/Hydroxyapatite Nanocomposites[J],50(7):179-186 |
| Preparation and Properties of Surface Modified Cellulose/Hydroxyapatite Nanocomposites |
| Received:April 16, 2021 Revised:May 11, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.07.018 |
| KeyWord:nanocellulose nanohydroxyapatite surface modification hydrophobic dispersion bone tissue engineering |
| Author | Institution |
| YANG Ke-qing |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
| ZHU Yu |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
| ZHAO Yi-yang |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
| YANG Jing-long |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
| CHEN Zong-ju |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
| ZHANG Xiu-cheng |
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin , China |
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| Abstract: |
| The work aims to prepare hydroxypropyl nano-cellulose/hydroxyapatite (NCC-HPC/HA) nanocomposites. The surface of nano-cellulose (NCC) was chemically modified with propylene oxide as modifier to obtain surface modified nano-cellulose (NCC-HPC) to improve the surface hydrophobicity and dispersion of NCC. On this basis, NCC-HPC/HA nanocomposites were prepared by co-precipitation method with NCC-HPC as nucleation point, and the structure and properties of the composites were studied. Hydroxyapatite nanospheres were successfully synthesized on modified nanocellulose by co-precipitation method. It was confirmed by analysis that the NCC surface modified by propylene oxide had almost no crystal structure change, its hydrophobicity and redispersion were improved, and it could stably exist in water and other organic solvent systems. The contact Angle between NCC-HPC and water increased from 17° to 55.3°. The surface of NCC-HPC/HA nanocomposite was uniformly distributed with Ca and P elements, and the Ca/P ratio was 1.64, which was close to the Ca/P ratio of real bone. The mechanical properties of the composites pressed at 2 MPa showed that:Compared with the NCC without surface modification, the mechanical properties of NCC-HPC/HA nanocomposites prepared by surface modification of nanocellulose were improved. The tensile strength could reach 3.48 MPa, an increase of 6.7%, the bending strength could reach 5.22 MPa, an increase of 4.4%, and the compression strength could reach 2.11 MPa. That's a 4.7 percent increase. The hydrophobicity of NCC modified by hydroxypropyl was improved, and its dispersion in aqueous solution was obviously improved. It was due to the introduction of new groups on the surface of NCC, which made the surface of particles become fluffy, particles were not tightly stacked, and the adsorption between particles was greatly weakened. The spherical nano-hydroxyapatite (n-HA) in the NCC-HPC/HA composite prepared on this basis was uniformly distributed on the linear NCC-HPC, which had good mechanical properties and thermal stability, and was suitable for bone tissue engineering applications. |
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