Method for preparing starch grafted hyperbranched amide polymer
An amide polymer, starch grafting technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of not getting branched polymers, and achieve the effects of easy control of polymerization reaction and remarkable turbidity removal effect.
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[0022] Example 1
[0023] (1) Add 1.0 parts of carboxymethyl starch (CMS), 100 parts of acetic acid-sodium acetate buffer solution (pH=5), and 0.0453 parts of 3-benzylmercaptothiocarbonylpropionic acid (BCPA) into a 250ml three-necked bottle. Stir, pass nitrogen and deoxygenate, heat up to 60°C, and gelatinize for 0.5 hours;
[0024] (2) 7.1 parts of acrylamide were added to the above-mentioned starch aqueous solution;
[0025] (3) Dissolve 0.59 parts of N,N'-methylenebisacrylamide in 50 parts of water and install it on a micro-injection pump;
[0026] (4) Weigh 0.020 part of ammonium persulfate (APS), dissolve it in a small amount of water and add it to a mixed solution of starch and acrylamide to initiate polymerization;
[0027] (5) Start the micro-injection pump, set the dripping acceleration rate, and complete the dripping of the N,N'-methylenebisacrylamide aqueous solution within 3 hours, and then continue the reaction for 0.5 hours to obtain hyperbranched polyacrylami...
Example Embodiment
[0035] Example 2
[0036] (1) Add 0.6 parts of carboxymethyl starch (CMS), 100 parts of acetic acid-sodium acetate buffer solution (pH=5), and 0.0272 parts of 3-benzylmercaptothiocarbonylpropionic acid (BCPA) into a 250ml three-necked bottle. Stir, pass nitrogen and deoxygenate, then heat up to 60°C, and gelatinize for 30 minutes;
[0037] (2) 7.1 parts of acrylamide were added to the above-mentioned starch aqueous solution;
[0038] (3) Dissolve 0.45 part of N,N'-methylenebisacrylamide in 50 parts of water and install it on a micro-injection pump;
[0039] (4) Weigh 0.020 part of ammonium persulfate (APS), dissolve it in a small amount of water and add it to a mixed solution of starch and acrylamide to initiate polymerization;
[0040] (5) Start the micro-injection pump, set the dripping acceleration rate, and complete the dripping of the N,N'-methylenebisacrylamide aqueous solution within 3 hours, and then continue to react for 1 hour to obtain hyperbranched polyacrylamide...
Example Embodiment
[0042] Example 3
[0043] (1) Add 1.0 parts of corn starch (Maize), 100 parts of acetic acid-sodium acetate buffer solution (pH=5), and 0.0453 parts of 3-benzylmercaptothiocarbonylpropionic acid (BCPA) into a 250ml three-necked bottle, stir mechanically, After nitrogen and oxygen removal, the temperature was raised to 95°C and gelatinized for 30 minutes;
[0044] (2) 7.1 parts of acrylamide were added to the above-mentioned starch aqueous solution;
[0045] (3) Dissolve 0.45 part of N,N'-methylenebisacrylamide in 50 parts of water and install it on a micro-injection pump;
[0046] (4) Weigh 0.020 part of ammonium persulfate (APS), dissolve it in a small amount of water and add it to a mixed solution of starch and acrylamide to initiate polymerization;
[0047] (5) Start the micro-syringe pump, set the dripping acceleration rate, and complete the dripping of the N,N'-methylenebisacrylamide aqueous solution within 3 hours, and then continue to react for 1 hour to obtain hyperb...
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