A kind of nano-silver polyester biodegradable plastic wrap and its preparation and application
A biodegradable silver polyester technology, applied in the field of polymers, can solve the problems of inability to solve the balance of hydrophobicity and hydrophilicity, inconvenient large-scale production and processing, and uneven degradation of degradable films, so as to achieve good biodegradable performance and comprehensive Low cost, uniform and thorough degradation effect
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Embodiment 1
[0061] 1) With respect to 1.00 mol of terephthalic acid, the slurry mixed with 4.50 mol of 1,4-butanediol, 1.5 mol of adipic acid and 0.05 mol of allyl polyethylene glycol ether was mixed at 70°C It is transported to the raw material storage tank a, and enters the continuous supply esterification reactor b through the raw material output pipe line 1. At the same time, a 0.005 mol solution of tetrabutyl titanate at 75° C. is sent from the pipeline 2 . The internal reaction temperature of the reactor b is 230°C and the pressure is 80kPa. The esterification water, by-products and the remaining polymerized monomer mixture are collected through the pipeline 3 in the rectification tower container c, and after the system is kept stable, the esterification water is collected , when the esterification rate reaches more than 90%, in the reactor b, continue to transport the 75°C tetrabutyl titanate solution from the pipeline 2 to the reactor b, and reduce the pressure to 5500Pa, and cont...
Embodiment 2
[0070] With respect to 1 mol of terephthalic acid, 1.1 mol of adipic acid was used, and the others were the same as in Example 1.
[0071] The biodegradability test result of gained copolyester film is as follows:
[0072] .
[0073] Tensile strength: transverse 155Mpa, longitudinal 142Mpa; nominal strain at break: transverse 920%, longitudinal 701%; right-angle tear strength: transverse 120N / cm; longitudinal 90N / cm; self-adhesiveness: 140N / ㎝2.
[0074] The antibacterial film has an antibacterial effect on Escherichia coli, and the antibacterial rate is 90%.
Embodiment 3
[0076] With respect to 1 mol of terephthalic acid, 2 mol of adipic acid was used, and the others were the same as in Example 1.
[0077] The biodegradability test result of gained copolyester film is as follows:
[0078] .
[0079] Tensile strength: transverse 125Mpa, longitudinal 116Mpa; nominal strain at break: transverse 790%, longitudinal 596%; right-angle tear strength: transverse 90N / cm; longitudinal 60N / cm; self-adhesiveness: 160N / ㎝2.
[0080] The antibacterial film has an antibacterial effect on Escherichia coli, and the antibacterial rate is 90%.
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