Polyε-caprolactone/poly(β-hydroxybutyrate-valerate) blend film and preparation method thereof
A technology of hydroxybutyric acid and caprolactone, which is applied in the field of gamma-ray modified PCL/PHBV blend materials and its preparation, can solve the problems of large spherulite size, limited application, and poor toughness of materials, and is beneficial to medicine Application, adjustable degradation performance, and the effect of improving brittleness
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Embodiment 1
[0023] (1) Dissolve 2.70g of polyε-caprolactone in 20ml of chloroform to obtain solution 1; dissolve 0.68g of poly(β-hydroxybutyrate-valerate) in 10ml of chloroform to obtain solution 2 ;
[0024] (2) Mix solution 1 and solution 2 until there is no turbidity to obtain mixed solution 3;
[0025] (3) Cast solution 3 on a glass plate, scrape the surface with a glass rod to make the thickness uniform, the thickness is 200 μm, form a film after the chloroform volatilizes, vacuum dry at 45°C to constant weight to obtain a blend film;
[0026] (4) The blended film obtained in step (3) was irradiated with γ-rays at a dose of 10kGy to obtain the polyε-caprolactone / poly(β-hydroxybutyrate-valerate) blend film.
[0027] The prepared blend film was tested as follows:
[0028] The thermal stability of the PCL / PHBV blend membrane was measured with a Shimadzu TA-50 thermogravimetric analyzer, the working gas was high-purity nitrogen with a flow rate of 10ml / min, and the heating rate was 10...
Embodiment 2
[0030] (1) Dissolve 0.80g of polyε-caprolactone in 10ml of chloroform to obtain solution 1; dissolve 0.80g of poly(β-hydroxybutyrate-valerate) in 20ml of chloroform to obtain solution 2 ;
[0031] (2) Mix solution 1 and solution 2 until there is no turbidity to obtain mixed solution 3;
[0032] (3) Cast solution 3 on a glass plate, scrape the surface with a glass rod to make the thickness uniform, and the thickness is 21 μm, form a film after the chloroform volatilizes, and dry it in vacuum at 45°C to constant weight to obtain a blend film;
[0033] (4) The blended film obtained in step (3) is irradiated with an electron beam generated by an electron accelerator, and the irradiation dose is 25kGy to obtain the polyε-caprolactone / poly(β-hydroxybutyric acid- valerate) blend film.
[0034] The prepared blend film was tested as follows:
[0035] The thermal stability of the PCL / PHBV blend membrane was measured with a Shimadzu TA-50 thermogravimetric analyzer, the working gas wa...
Embodiment 3
[0037] (1) Dissolve 0.50g of polyε-caprolactone in 10ml of chloroform to obtain solution 1; dissolve 1.98g of poly(β-hydroxybutyrate-valerate) in 35ml of chloroform to obtain solution 2 ;
[0038] (2) Mix solution 1 and solution 2 until there is no turbidity to obtain mixed solution 3;
[0039] (3) Cast solution 3 on a glass plate, scrape the surface with a glass rod to make the thickness uniform, the thickness is 56 μm, form a film after the chloroform volatilizes, and dry it in vacuum at 45°C to constant weight to obtain a blend film;
[0040] (4) The blended film obtained in step (3) is irradiated with γ-rays, and the irradiation dose is 70kGy to obtain the polyε-caprolactone / poly(β-hydroxybutyrate-valerate) blend film.
[0041] The prepared blend film was tested as follows:
[0042] According to the method mentioned in Example 1, the thermal stability of the PCL / PHBV blend film was studied, and the thermal decomposition temperature of the prepared blend film was increas...
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