Rapid detection of biodegradable materials based on infrared spectroscopy
With the application of biodegradable plastics,some businesses will add non-degradable materials to reduce the cost of biodegradable plastics,resulting in environmental pollution.Therefore,rapid and accurate identification of the components of biodegradable plastics has become an important technical issue.In this paper,the standard spectra of raw materials such as polylactic acid and polybutylene terephthalate were determined by infrared spectroscopy,and their characteristic functional groups were marked.Then the degradation material blends with different components and contents were prepared by solution blending,melt blending and in-situ polymerization,and their infrared spectra were measured.Through infrared spectroscopy analysis,it was found that different preparation methods had no effect on the structure of the blend,no other by-products were generated,and no degradation occurred.Finally,the effects of non-degradable materials such as high-density polyethylene,starch and KH550 treated nano-silica as inorganic fillers on biodegradation were discussed to study the interference of non-degradable materials,degradable materials and inorganic fillers on the rapid detection of biodegradable plastics by infrared spectroscopy.Finally,a simple,convenient and low-cost infrared spectrum detection method was formed.
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