Method for preparing amphiprotic starch solution for papermaking
A technology of amphoteric starch and solution, which is applied in the direction of papermaking, textiles, papermaking, paper, etc., can solve the problems of long production time, gelation, inconvenient use, etc., and achieve less production time, enhanced burst resistance and ring pressure strength , Solve the effect of aging and retrograde
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Embodiment 1
[0008] Add 10g of sodium hydroxide and 50g of sodium hypochlorite solution (9% available chlorine) to 1000g of water, stir evenly until no insoluble matter exists, add 200g of tapioca starch while stirring, and obtain starch milk after stirring evenly, heat to 95°C, heat-preserve and gelatinize After 10 minutes, 20 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride solution (concentration: 50 wt %) was added, and the reaction was continued at 95° C. for 60 minutes, and finally cooled to obtain the amphoteric starch solution.
Embodiment 2
[0010] Add 30g of sodium hydroxide and 10g of potassium persulfate to 1000g of water, stir well until there is no insoluble matter, add 150g of potato starch while stirring, and obtain starch milk after stirring evenly, heat to 80°C, keep warm and gelatinize for 20 minutes, then add 20g of 3-chloro-2-hydroxypropyltrimethylammonium chloride solution (concentration: 50wt%), continued to keep warm at 80°C for 30 minutes, and finally cooled to obtain the amphoteric starch solution.
Embodiment 3
[0012] Add 10g of sodium hydroxide and 40g of sodium hypochlorite solution (9% available chlorine) to 1000g of water, stir evenly until no insoluble matter exists, add 200g of tapioca starch while stirring, and obtain starch milk after stirring evenly, heat to 70°C, heat-preserve and gelatinize After 30 minutes, 20 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride solution (concentration: 50 wt %) was added, and the reaction was continued at 70° C. for 60 minutes, and finally cooled to obtain an amphoteric starch solution.
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