Biodegradable plastic with antibacterial property and preparation method thereof
A biodegradable plastic, antibacterial technology, applied in organic dyes, chemical instruments and methods, natural dyes, etc., can solve problems such as poor molding performance, hidden dangers to humans and the environment, and toxic chemicals, and achieve easy degradation and energy saving. Eco-friendly price, rich source effect
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Embodiment 1
[0031] The first step is to wash, dry and crush the roots of rhubarb; in parts by mass, use ethanol at 45°C with an ultrasonic frequency of 10KHz to 20KHz and alternately ultrasonicate the crushed plants at a material-to-liquid ratio of 1:1. Extract for 1.6 hours, cool to room temperature, filter with suction, concentrate the filtrate, and freeze-dry to obtain a yellow powdery antibacterial plant-derived dye;
[0032] In the second step, the biodegradable material PBS masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS masterbatch is completely melted, the rhubarb antibacterial plant source extracted from the first step with a mass percentage of 0.3% is added therein Dye, dispersant EVA-3 with a mass percentage of 0.15%, and coupling agent KH-550 with a mass percentage of 0.15%, knead at 110°C for 16 minutes, stir and mix the added materials, and take them out after natural cooling. Biodegradable plastics with antibacterial properties.
[0033...
Embodiment 2
[0035] The first step is to wash, dry and crush the roots of rhubarb; in parts by mass, use acetone at 25°C, ultrasonic frequency 50KHz-80KHz and alternately apply ultrasonic waves for 30s at a material-to-liquid ratio of 1:50. Extract for 0.1h, cool to room temperature, filter with suction, concentrate the filtrate, and freeze-dry to obtain a yellow powdery antibacterial plant-derived dye;
[0036] In the second step, the biodegradable material PBS masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS masterbatch is completely melted, the rhubarb antibacterial plant source extracted from the first step with a mass percentage of 0.01% is added to it Dyes, dispersant CH-2C with a mass percentage of 10%, and coupling agent TTOPP-38S with a mass percentage of 0.3%, kneaded at 80°C for 25 minutes, stirred and mixed the added materials, and took them out after natural cooling. Biodegradable plastics with antibacterial properties.
[0037] The effect ...
Embodiment 3
[0039] In the first step, rhubarb roots are washed, dried, and crushed; in parts by mass, the crushed plants are mixed with 0.2% Na 2 CO 3 Ultrasonic extraction at 60°C with an ultrasonic frequency of 35KHz-40KHz and 60s alternately for 15h, after cooling to room temperature, suction filtration, concentration of the filtrate, freeze-drying to obtain a yellow powder antibacterial plant-derived dye.
[0040] In the second step, the biodegradable material PBS-COOH masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS-COOH masterbatch is completely melted, the rhubarb extracted from the first step with a mass percentage of 5% is added to it Antibacterial plant source dye, dispersant 295A with a mass percentage of 8%, and coupling agent ModA with a mass percentage of 4.2%, kneaded at 115°C for 40 minutes, stirred and mixed the added materials, and took them out after natural cooling to prepare Biodegradable plastics with antibacterial properties.
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