Sandwich structure interpenetrating network type elastic fiber sound-absorbing sponge and preparation method thereof
An interpenetrating network type, sound-absorbing sponge technology, applied in chemical instruments and methods, cellulose plastic material layered products, instruments, etc., can solve problems such as difficulty in improving sound-absorbing performance, unstable structure of fluffy fiber materials, and cumbersome preparation process. , to achieve the effect of improving sound absorption performance, good fiber structure controllability, and simple process
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Embodiment 1
[0031] A method for preparing a sandwich structure interpenetrating network type elastic fiber sound-absorbing sponge, the specific steps are:
[0032] Step 1: Place the polystyrene slices and the bisphenol A powder in a vacuum oven at 60°C for 2 hours and in a vacuum oven at 40°C for 1.5 hours, respectively.
[0033] Step 2: Disperse the dried bisphenol A binder in the DMF solution, place the dispersion in an ultrasonic instrument and vibrate ultrasonically for 15 minutes to form a uniform dispersion. Subsequently, the dried polystyrene powder was dissolved in the above dispersion liquid, and then placed on a magnetic stirrer with a heating device, heated and stirred for 7 hours, and then stirred at 25°C for 7 hours to form a polystyrene / bisphenol A composite spinning solution. In the composite spinning solution, the total mass fraction of polystyrene and bisphenol A is 30 wt%, wherein bisphenol A powder accounts for 15 wt% of the polystyrene mass.
[0034] The third step: ...
Embodiment 2
[0037] A method for preparing a sandwich structure interpenetrating network type elastic fiber sound-absorbing sponge, the specific steps are:
[0038] Step 1: Place the polysulfone chips and the bisphenol A benzoxazine powder in a vacuum oven at 60°C for 2 hours and in a vacuum oven at 50°C for 4 hours, respectively.
[0039] Step 2: Disperse the bisphenol A benzoxazine powder in the DMF solution, and place the solution in an ultrasonic instrument for ultrasonic vibration for 20 minutes to form a uniform solution. Subsequently, the dried polysulfone powder was dissolved in the above solution, and then placed on a magnetic stirrer with a heating device and heated and stirred for 6 hours, and then stirred at 25°C for 8 hours to form a polysulfone / bisphenol A type benzoxan Azine compound spinning solution. In the composite spinning solution, the total mass fraction of polysulfone and bisphenol A benzoxazine is 25 wt%, wherein bisphenol A benzoxazine accounts for 10 wt% of the m...
Embodiment 3
[0043] A method for preparing a sandwich structure interpenetrating network type elastic fiber sound-absorbing sponge, the specific steps are:
[0044] Step 1: Place the polyacrylonitrile powder in a vacuum oven at 60° C. for 5 hours to vacuum dry.
[0045] The second step: dissolving the polyglycol diacrylate binder in the DMF solution, and placing the solution in an ultrasonic instrument for ultrasonic vibration for 20 minutes to form a uniform dispersion. Subsequently, the dried polyacrylonitrile powder was dissolved in the above solution, and then placed on a magnetic stirrer with a heating device, heated and stirred for 6 hours, and then stirred at 25°C for 6 hours to form polyacrylonitrile / polyglycol diacrylic acid Ester composite spinning solution. In the composite spinning solution, the total mass fraction of polyacrylonitrile and polyglycol diacrylate is 15wt%, wherein the polyglycol diacrylate solution accounts for 10wt% of the mass of polyacrylonitrile.
[0046] T...
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