Composite biological material and preparing method
A composite biomaterial, polylactic acid technology, applied in the field of carbon fiber reinforced hydroxyapatite/polylactic acid composite biomaterial and its preparation, can solve problems such as unsatisfactory mechanical strength and inability to meet the requirements for the fixation strength of large bone segments. Achieve the effect of simple preparation method
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Embodiment 1
[0015] Components of the composite biological material and their weight percent content: polylactic acid (PLA) 90%, hydroxyapatite (HA) 9.0%, carbon fiber (CF) 1.0%.
[0016] Preparation:
[0017] Take PLA, HA and CF in proportion, first mix PLA and HA, add solvent chloroform, and stir thoroughly to obtain HA / PLA suspension, then disperse CF evenly in HA / PLA suspension under stirring, and volatilize the solvent at room temperature to obtain Impregnated tape, put the impregnated tape into the mold, put the mold with the prepreg tape into the hot press, heat press at 160°C and 10MPa for 20 minutes, and open the mold to take out the sample.
[0018] Test the mechanical properties and biodegradability of composite materials:
[0019] The prepared material is placed in simulated body fluid (PBS liquid of pH7.4, formula: NaCl 137mmol / L, KCl 2.7mmol / L, NaCl 2 HPO 4 4.3mmol / L, KH 2 PO 4 1.4mmol / L), soaked for 3 months, took out, washed and dried, and measured the pH value chang...
Embodiment 2
[0024] Components of the composite biological material and their weight percentage contents: polylactic acid (PLA) 85%, hydroxyapatite (HA) 13.8%, carbon fiber (CF) 1.2%.
[0025] Preparation:
[0026] Take PLA, HA and CF in proportion, first mix PLA and HA, add solvent chloroform, and stir thoroughly to obtain HA / PLA suspension, then disperse CF evenly in HA / PLA suspension under stirring, and volatilize the solvent at room temperature to obtain Impregnated tape, put the impregnated tape into the mold, put the mold with the prepreg tape into the hot press, heat press at 170°C and 12MPa for 25 minutes, and open the mold to take out the sample.
[0027] Test the mechanical properties and biodegradability of composite materials:
[0028] The prepared material was placed in simulated body fluid (PBS solution with pH 7.4, the formula is the same as in Implementation 1), soaked for 3 months, taken out, washed and dried, and measured the pH value change of the soaked material soluti...
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