A kind of preparation method of composite degradable plastic bag
A technology for degrading plastics and plastic bags, which is applied in sustainable manufacturing/processing, sustainable packaging, climate sustainability, etc. It can solve the problems of poor tensile strength and barrier properties, slow degradation speed, poor oil resistance, etc. question
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Embodiment 1
[0029] Preparation of modified bamboo fiber:
[0030]Weigh the bamboo strips and spread them on the ground, and use stone rollers to repeatedly crush and defibrate for 1 hour. After the rolling and defibrating treatment, put the defibrated bamboo strips into a pulverizer and grind them for 30 minutes to obtain bamboo fiber pulverization. The crushed fiber and sodium hydroxide solution with a mass fraction of 10% are mixed in a mass ratio of 1:10, put into a cooking pot, and cook at 180°C for 3 hours;
[0031] After the above-mentioned cooking is completed, the filter residue is obtained by filtration and separation, and the filter residue and the ethanol solution with a mass fraction of 30% and phenol are mixed in a mass ratio of 5:50:1 and then put into the reactor, and then phenol quality 4 is added to the reactor. % mass fraction is 25% ammonia water, heated up to 80°C, stirred and reacted for 4h, then filtered, and separated to obtain the reaction filter residue;
[0032]...
Embodiment 2
[0039] Preparation of modified bamboo fiber:
[0040] Weigh the bamboo strips and spread them on the ground, and use stone rollers to repeatedly crush and defibrate for 1.5 hours. After the rolling and defibrating treatment, put the defibrillated bamboo strips into the pulverizer and grind them for 35 minutes to obtain bamboo fiber pulverization. The crushed bamboo fiber and the sodium hydroxide solution with a mass fraction of 10% are mixed in a mass ratio of 1:10, put into a cooking pot, and cook at 190°C for 4 hours;
[0041] After the above-mentioned cooking is completed, the filter residue is obtained by filtration and separation, and the filter residue and the ethanol solution with a mass fraction of 30% and phenol are mixed in a mass ratio of 5:50:1 and then put into the reactor, and then phenol quality 4 is added to the reactor. % mass fraction is 25% ammonia water, heated up to 85°C, stirred and reacted for 4.5h, then filtered, and separated to obtain the reaction fil...
Embodiment 3
[0049] Preparation of modified bamboo fiber:
[0050] Weigh the bamboo strips and spread them on the ground, and use stone rollers to repeatedly crush and defibrate for 2 hours. After the rolling and defibrating treatment, put the defibrillated bamboo strips into a pulverizer and grind them for 40 minutes to obtain bamboo fiber pulverization. The fiber pulverized product and the sodium hydroxide solution with a mass fraction of 10% are mixed according to a mass ratio of 1:10, put into a cooking pot, and cook at 200°C for 5 hours;
[0051] After the above-mentioned cooking is completed, the filter residue is obtained by filtration and separation, and the filter residue and the ethanol solution with a mass fraction of 30% and phenol are mixed in a mass ratio of 5:50:1 and then put into the reactor, and then phenol quality 5 is added to the reactor. % mass fraction is 25% ammonia water, heated up to 90°C, stirred and reacted for 5h, then filtered, and separated to obtain the reac...
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Abstract
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