Preparation of Porous Polyvinyl Alcohol Materials by Freeze-Thaw Method and Property Analysis
Porous polyvinyl alcohol/β-Tricalcium phosphate/carbon nanotubes(PVA/β-TCP/CNT)composites were prepared by freeze-thaw method,and the effects of CNT addition on the porosity and mechanical properties of CP/CNT composite materials were investigated.The results show that adding an appropriate amount of CNT can effectively reduce the pore size and porosity of PVA/β-TCP/CNT porous composites ensure the formation of a denser porous structure in the porous polyvinyl alcohol composites.When the CNT addition amount is 0.3%～0.5%,the porosity of the composites is the lowest,about 82% .After adding CNT,the elastic modulus and tensile strength of PVA/β-TCP/CNT porous composites were significantly improved,and the swelling of PVA/β-TCP/CNT porous composites is significantly decreased.When the CNT addition is 0.3%,the elastic modulus and tensile strength of the composites reach 2 245.08 MPa and 6.61 MPa,respectively.The prepared PVA/β-TCP/CNT porous composites can meet the requirements of medical biomaterial polymer scaffolds.
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