Biomass cellulose modified PVDF hollow fiber microfiltration membrane as well as preparation method and application thereof
A biomass and cellulose technology, used in chemical instruments and methods, biological water/sewage treatment, membranes, etc., can solve the problems of easy detachment of carbon nanotube modified layers, and achieve good anti-pollution performance and anti-mechanical fracture performance. , The effect of low processing cost and simple processing method
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[0033] Example 1
[0034] A preparation method of biomass cellulose modified PVDF hollow fiber microfiltration membrane includes the following steps:
[0035] (1) The biomass is selected from tea residue. After being crushed and washed with water, the tea residue is added to the acid sodium chlorite solution for immersion treatment. The pH of the acid sodium chlorite solution is adjusted to 3 with nitric acid, and the immersion temperature is 100°C. It is 30min; after immersion, it is washed with 95% ethanol solution to obtain biomass crude cellulose; the above biomass crude cellulose is placed in a sodium hydroxide solution with a mass concentration of 2% and heated to 100°C for alkali treatment After 30 minutes, the hemicellulose was removed to obtain biomass cellulose, which was dried for later use.
[0036] (2) Add biomass cellulose to DMAC, and add LiCl, the dosage of LiCl is 60g / L; ultrasonic 6h under the condition of ultrasonic power 100W at 80℃ temperature makes the biomass ...
Example Embodiment
[0049] Example 2
[0050] A preparation method of biomass cellulose modified PVDF hollow fiber microfiltration membrane includes the following steps:
[0051] (1) The biomass is selected from tea residue. After being crushed and washed, the tea residue is added to the acid sodium chlorite solution for immersion treatment. The pH of the acid sodium chlorite solution is adjusted to 4 with nitric acid, and the immersion temperature is 100°C. After the immersion is finished, wash it with 95% ethanol solution to obtain crude biomass cellulose; take the crude biomass cellulose and place it in a 2% sodium hydroxide solution by mass concentration and heat it to 100°C for 30 minutes alkali treatment to remove Biomass cellulose is obtained after hemicellulose, which is dried for later use.
[0052] (2) Add the biomass cellulose to DMAC, and add LiCl, the dosage of LiCl is 60g / L, ultrasonic 6h under the condition of ultrasonic power of 100W at 80℃, so that the biomass cellulose is fully disper...
Example Embodiment
[0060] Example 3
[0061] A preparation method of biomass cellulose modified PVDF hollow fiber microfiltration membrane includes the following steps:
[0062] (1) The biomass is selected from tea residue. After being crushed and washed with water, the tea residue is added to the acid sodium chlorite solution for immersion treatment. The pH of the acid sodium chlorite solution is adjusted to 3.5 with nitric acid, and the immersion temperature is 100°C. It is 30min; after the immersion, it is washed with 95% ethanol solution to obtain biomass crude cellulose; the above biomass crude cellulose is placed in a 2% mass concentration sodium hydroxide solution and heated to 120°C for alkali treatment for 50 minutes, After removing the hemicellulose, the biomass cellulose is obtained, which is dried for later use.
[0063] (2) Add the biomass cellulose to DMAC, and add LiCl, the dosage of LiCl is 60g / L, ultrasonic 6h under the condition of ultrasonic power of 100W at 80℃, so that the biomass...
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