Amino-terminated hyperbranched polyamide modified waste leather scraps as graphene oxide single-lamella small-size dispersing agent and preparation method and application thereof
An amino-terminal hyperbranching and waste dander technology, which is applied in the directions of single-layer graphene, chemical instruments and methods, applications, etc., can solve the problems such as the inability to generate waste dander, and achieve the effect of reducing dosage and improving softness.
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[0037] A method for preparing and using waste dander modified by amino-terminated hyperbranched polyamide as a graphene oxide single-layer small-size dispersant, the specific steps are:
[0038] (1) The preparation of the degraded waste dander solution includes the following steps:
[0039] Mix 200~300 parts of alkali solution and 25~30 parts of waste dander, stir and react at 80~90°C for 10~12 hours, then suction filter while hot to remove the filter residue, the filtrate is alkali degraded waste dander solution;
[0040] Adjust 200-300 parts of the alkali-degraded waste dander solution obtained above to a pH value of 9-11 with dilute acid, add 4-6 parts of alkaline protease, stir at 50-60°C for 5-6 hours, and remove by rotary evaporation. The solid content in the degraded waste dander dispersant obtained by moisture control is 10-15%.
[0041] The waste dander is the waste dander produced by tannery, leather products factory, etc. The waste dander produced actually comes f...
Embodiment 1
[0063] (1) The preparation of the degraded waste dander solution includes the following steps:
[0064] Mix 200 parts of sodium hydroxide solution with a mass fraction of 3% and 25 parts of waste dander, stir and react at 80°C for 10 hours, then suction filter while hot to remove the filter residue, and the filtrate is an alkali-degraded waste dander solution;
[0065] Adjust 200 parts of the alkali-degraded waste dander solution obtained above to a pH value of 9 with dilute hydrochloric acid with a concentration of 2 mol / L, add 4 parts of alkaline protease, stir at 50°C for 5 hours, and remove water by rotary evaporation to control the resulting degradation. The solids content in the waste dander solution was 10%.
[0066] (2) Synthesis of amino-terminated hyperbranched polyamide
[0067] Put 52 parts of triethylenetetramine into the reaction container, add dropwise a mixed solution of 43 parts of methyl acrylate and 100 parts of methanol under the protection of nitrogen, an...
Embodiment 2
[0075] (1) The preparation of the degraded waste dander solution includes the following steps:
[0076] Mix 300 parts of 5% potassium hydroxide and 30 parts of waste dander, stir and react at 90°C for 12 hours, then suction filter while hot to remove the filter residue, and the filtrate is an alkali-degraded waste dander solution;
[0077] Adjust 300 parts of the alkali-degraded waste dander solution obtained above to a pH value of 11 with 3 mol / L dilute sulfuric acid, add 6 parts of alkaline protease, stir at 60°C for 6 hours, and remove moisture by rotary evaporation to control the obtained degraded dander The solids content in the solution was 15%.
[0078] (2) Synthesis of amino-terminated hyperbranched polyamide
[0079] Put 62 parts of triethylenetetramine into the reaction container, add dropwise a mixed solution of 53 parts of methyl acrylate and 120 parts of methanol under the protection of nitrogen, and after the dropwise addition, raise the temperature to 40°C for ...
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