Starch-based biodegradable packaging bottle with high oxygen barrier property and preparation method thereof
An oxygen barrier and biodegradation technology, which is applied in the field of high oxygen barrier performance starch-based biodegradable packaging bottles and its preparation, can solve the problems of poor comprehensive performance and achieve the effect of improving dispersibility, improving dispersibility and good comprehensive performance
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Embodiment 1
[0032] Get 100 parts of modified cornstarch, 20 parts of glycerol as plasticizer, 3 parts of tartaric acid as chemical modifier, 2 parts of talcum powder grafted with polybutadiene as functional filler, wherein the hydroxyl-terminated polybutadiene and the terminal ring The ratio of oxypolybutadiene is 1:1, the catalyst is 0.05 part of zinc neodecanoate, the chain extender is 0.5 part of isocyanate chain extender, and the biodegradable resin is 60 parts of polylactic acid.
[0033] The preparation method comprises the following steps:
[0034] 1) Preparation of functional fillers: After the dried fillers were ultrasonically treated in anhydrous toluene, toluene diisocyanate (TDI) and catalyst dibutyltin dilaurate (DBTDL) were added at 50°C and reacted under a nitrogen atmosphere , and the intermediate product was obtained after the slurry at the end of the reaction was dried; the product of step 1 and anhydrous toluene were subjected to ultrasonic treatment under nitrogen protec...
Embodiment 2
[0040] Get 100 parts of modified corn starch, plasticizer is 15 parts of glycerin and 10 parts of sorbitol, chemical modifier is 3 parts of citric acid, functional filler is 5 parts of talcum powder grafted with polybutadiene, wherein the terminal hydroxyl poly The ratio of butadiene to epoxy-terminated polybutadiene is 1:3, the catalyst is 0.09 parts of cobalt neodecanoate, the chain extender is 1 part of isocyanate chain extender, and the biodegradable resin is 90 parts of polylactic acid.
[0041] The preparation method comprises the following steps:
[0042] 1) Preparation of functional filler: the reaction conditions are the same as in Example 1;
[0043] 2) Raw material premixing treatment: Mix the specified amount of starch, plasticizer, and chemical modifier in a high-speed mixer at 50°C at 800 rpm for the first time at high speed for 8 minutes; heat up to 80°C, Add the specified amount of functional filler, chain extender and biodegradable resin for the second high-s...
Embodiment 3
[0048] Get 100 parts of modified potato starch, plasticizer is 15 parts of glycerin and 5 parts of epoxidized soybean oil, chemical modifier is 3 parts of citric acid, functional filler is 8 parts of talcum powder grafted with polybutadiene, and the end The ratio of hydroxyl polybutadiene to epoxy-terminated polybutadiene is 1:3, the catalyst is 0.1 part of cobalt neodecanoate, the chain extender is 1.5 parts of epoxy chain extender, and the biodegradable resin is itaconic anhydride 90 parts of grafted polylactic acid.
[0049] The preparation method comprises the following steps:
[0050] 1) Preparation of functional filler: the reaction conditions are the same as in Example 1;
[0051] 2) Raw material premixing treatment: Mix the specified amount of starch, plasticizer, and chemical modifier in a high-speed mixer at 50°C at 800 rpm for the first time for 10 minutes; heat up to 80°C, Add the specified amount of functional filler, chain extender and biodegradable resin for t...
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