A kind of biomass nano cellulose conductive composite film and preparation method thereof
A technology of nanocellulose and composite film, which is used in equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc. The surface is non-polar, and there are no problems such as compounding of metal nanowires and biomass polymer films to achieve the effects of high flexibility, good conductivity, and ensuring flatness.
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[0029] The invention provides a method for preparing a biomass nanocellulose conductive composite film, comprising the following steps:
[0030] 1) Suction filtration of the biomass cellulose aqueous suspension to obtain a biomass cellulose hydrogel; the thickness of the biomass cellulose hydrogel is 0.5-1 mm;
[0031] 2) immersing the biomass cellulose hydrogel obtained in step 1) into ethanol for sequential replacement, film removal and first drying to obtain biomass cellulose paper;
[0032] 3) placing the biomass cellulose paper obtained in step 2) on the silicon wafer after being immersed in the PMMA solution to carry out the second drying to obtain the biomass cellulose composite film;
[0033] 4) The biomass cellulose composite film obtained in step 3) is cleaned by plasma to obtain the treated biomass cellulose composite film;
[0034] 5) Applying the silver nanowire dispersion to one side of the treated biomass cellulose composite film obtained in step 4) to obtain a...
Embodiment 1
[0106] 1) Extraction of cellulose from biomass material
[0107] (1) Add 4g poplar wood powder to 130mL distilled water, add 1.34g sodium chlorite, add 1mL glacial acetic acid, cover the Erlenmeyer flask with a sealed bag, heat in a constant temperature water bath at 75°C for 1 hour, repeat "Add 1.34g nitrous acid Cover the Erlenmeyer flask with a sealed bag for sodium and 1mL of glacial acetic acid, heat it in a constant temperature water bath at 75°C for 1 hour" for 4 times, filter it with suction, wash the sample until it is neutral, and obtain the de-lignified poplar wood powder.
[0108](2) Weighing 2.4 potassium hydroxide to prepare 2wt% potassium hydroxide solution and de-ligninized poplar wood powder, heating in a constant temperature water bath at 90°C for 2 hours, suction filtering, cleaning the sample to neutrality, and obtaining the alkali-treated Poplar powder.
[0109] (3) Add 1.34 g of sodium chlorite to the alkali-treated poplar wood powder, place 1 mL of glac...
Embodiment 2
[0119] 1) Put the biomass cellulose hydrogel obtained in Example 1 into an ethanol solution and replace it for 12 hours to obtain a nano-cellulose alcohol gel, place the alcohol gel on a glass plate to cover it, and place it in a vacuum drying oven at 60°C After drying for 2 hours, biomass cellulose nanopaper was obtained.
[0120] 2) Put the obtained biomass cellulose paper into a beaker filled with 40mL of 20wt% PMMA solution and soak for 24h, then take out and place a single throw silicon wafer, cover it with a petri dish and dry it at room temperature for 3h to obtain transparent biomass cellulose Composite film.
[0121] 3) Put the biomass cellulose composite film into a plasma cleaning machine for plasma treatment, the frequency is 40KHZ, the power is 600W, and the treatment time is 3min to obtain the treated biomass nanocellulose composite film.
[0122] 4) On the treated biomass cellulose composite film, 125mL is drop-coated with a 5mg / mL silver nanowire dispersion, s...
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