Preparation method of superfine bacteria cellulose powder
A technology of bacterial cellulose and powder, which is applied in the field of preparation of ultrafine bacterial cellulose powder, can solve the problems of inconvenient transportation and carrying, limited functions and effects, inconvenient long-term storage, etc., and achieves easy storage and transportation, and simple preparation process Easy to do, low cost effect
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Embodiment 1
[0030] (1) Take 1000 g of bacterial cellulose gel and stir it with a juicer (15000 rpm) to pulverize and homogenate for 10-20 minutes to obtain a coarse homogenate;
[0031] (2) The homogenate is filtered once with a single layer of ordinary gauze (20-30 mesh), and the unfiltered BC is returned to the homogenizer to continue the homogenization, and then filtered, and the operation is repeated until all can be filtered, and the homogenate is collected;
[0032] (3) Dilute the homogenate with deionized water at a volume ratio of 1:2, 1:3, and 1:4, and use a rheometer to measure the viscosity of the original slurry and deionized water, and compare the changes in viscosity after dilution ;
[0033]At room temperature, the viscosity of the bacterial cellulose homogenate after filtration changes greatly from that before filtration. Table 1 shows that the viscosity of the BC homogenate before filtration is 5.47 Pa.S, and that after filtration is 0.0194 Pa.S; the viscosity of bacteria...
Embodiment 2
[0037] (1) Take 1000 g bacterial cellulose gel, press to remove half of the water, stir in a high-speed homogenizer (8000-15000 rpm) and pulverize the homogenate for 30 minutes to obtain a coarse homogenate;
[0038] (2) The homogenate is filtered once with a single layer of ordinary gauze (20-30 mesh), and the unfiltered BC is returned to the homogenizer to continue the homogenization, and then filtered, and the operation is repeated until all can be filtered, and the homogenate is collected;
[0039] (3) Dilute the homogenate with deionized water at a ratio of 1:6, spray dry (inlet temperature 130°C, pump speed 20 r / min, air flow rate 18 L / min), and collect bacterial cellulose powder and glass Bacterial cellulose attached to the wall, photograph showing bacterial cellulose formed into granular powder after spray drying (see Figure 4 ).
Embodiment 3
[0041] (1) Take 1000 g bacterial cellulose gel and stir in a high-speed homogenizer (22000 rpm) for 15-30 min to obtain a coarse homogenate; (2) Filter once on a filter cloth (20 mesh) on a plate-and-frame filter , return the unfiltered BC to the homogenizer to continue homogenization, then filter, repeat the operation until all can be filtered, and collect the homogenate;
[0042] (3) Take 1 mL of homogenate from 5 different positions of the homogenate, 5 mL in total, put it into a weighing bottle, and dry it in a constant temperature blast drying oven at 105 °C to absolute dry weight, denoted as m 0 (g), measure the total volume of the homogenate V 1 (mL);
[0043] (4) Dilute the homogenate with water, spray dry, collect bacterial cellulose powder and bacterial cellulose attached to the glass wall, dry it in a constant temperature blast drying oven at 105°C to absolute dry weight, and weigh it as m 2 , then the calculation of the total dry weight of the homogenate is shown...
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