Preparation method of tough polymer film
A technology of polymer film and mixed solution, which is applied in the field of preparation of strong polymer film, can solve the problems of insignificant improvement of elongation at break, poor practicability, and reduction of elongation at break, etc., to improve stress transmission Efficiency, increased tensile strength, and increased elongation at break
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Embodiment 1
[0021] Embodiment 1: a kind of preparation method of tough polymer film, this method comprises the following steps:
[0022] 1) Take 10mL of 3.0wt% PEI aqueous solution, add it to 5mL of 3.0wt% CNC suspension, stir continuously at room temperature for 1h, and then use concentrated hydrochloric acid to adjust the pH of the mixed solution to 1.3 to enhance the relationship between CNC and PEI. After continuing to stir for ten minutes, the mixed solution was centrifuged at a high speed of 13000rpm for 20min, the supernatant was discarded, and the precipitate was washed three times with ultrapure water to remove free PEI molecules that did not interact. Finally, redisperse the precipitate in water, centrifuge at low speed for 5 minutes to remove the CNC aggregates and collect the supernatant to obtain a monodisperse CNC suspension with a concentration of 1.0 wt%, named as PCNC suspension for later use;
[0023] 2) Add 2g of montmorillonite powder into 500mL of ultrapure water, dis...
Embodiment 2
[0030] Embodiment 2: a kind of preparation method of tough polymer film, this method comprises the following steps:
[0031] 1) Take 10mL of 3.0wt% PEI aqueous solution, add it to 5mL of 3.0wt% CNC suspension, stir continuously at room temperature for 1h, and then use concentrated hydrochloric acid to adjust the pH of the mixed solution to 1.3 to enhance the relationship between CNC and PEI. After continuing to stir for ten minutes, the mixed solution was centrifuged at a high speed of 13000rpm for 20min, the supernatant was discarded, and the precipitate was washed three times with ultrapure water to remove free PEI molecules that did not interact. Finally, redisperse the precipitate in water, centrifuge at low speed for 5 minutes to remove the CNC aggregates and collect the supernatant to obtain a monodisperse CNC suspension with a concentration of 1.0 wt%, named as PCNC suspension for later use;
[0032] 2) Add 2g of montmorillonite powder into 500mL of ultrapure water, dis...
Embodiment 3
[0040] Embodiment 3: a kind of preparation method of tough polymer film, this method comprises the following steps:
[0041] 1) Take 10mL of 3.0wt% PEI aqueous solution, add it to 5mL of 3.0wt% CNC suspension, stir continuously at room temperature for 1h, and then use concentrated hydrochloric acid to adjust the pH of the mixed solution to 1.3 to enhance the relationship between CNC and PEI. After continuing to stir for ten minutes, the mixed solution was centrifuged at a high speed of 13000rpm for 20min, the supernatant was discarded, and the precipitate was washed three times with ultrapure water to remove free PEI molecules that did not interact. Finally, redisperse the precipitate in water, centrifuge at low speed for 5 minutes to remove the CNC aggregates and collect the supernatant to obtain a monodisperse CNC suspension with a concentration of 1.0 wt%, named as PCNC suspension for later use;
[0042] 2) Add 2g of montmorillonite powder into 500mL of ultrapure water, dis...
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