Preparation and characterizations of biodegradable PBAT/PLA/biomass garbage bags

doi:10.19491/j.issn.1001-9278.2022.11.019

Abstract

Abstract:

The garbage bags based on poly（butylene adipic acid⁃co⁃terephthalate）（PBAT）/poly（lactic acid）（PLA）/biomass complex powder composites at a mass ratio 74.26/4.95/19.80 were prepared through granulation and extrusion blowing processes. PBAT and PLA were melt blended with bamboo， lignin， and straw complex powders. The microstructure， composition， heat resistance， tensile properties and leakage resistance of the garbage bags were characterized using scanning electron microscopy， Fourier⁃transform infrared spectroscopy， X⁃ray diffraction， thermogravimetric analysis， and differential scanning calorimetry， and their practicability was also evaluated. The results indicated that the dispersibility of three types of biomass powders in the PBAT/PLA matrix had little effect on the film structure and thermal properties. Compared to the garbage bags containing bamboo and lignin powders， the garbage bags containing straw powders presented an increase in strength by over 40 %. This work exhibited an important significance for reducing the production cost of PBAT/PLA garbage bags and promoting the industrial application of biodegradable materials.

Key words: biodegradability, poly（butylene adipic acid?co?terephthalate）, poly（lactic acid）, biomass powder, composite garbage bag

CLC Number:

TQ327.9

YANG Shangshan, SHANG Pengpeng, XU Jing, XIE Jiazhuo, ZHANG Kun, ZHANG Lili. Preparation and characterizations of biodegradable PBAT/PLA/biomass garbage bags[J]. China Plastics, 2022, 36(11): 127-132.

Figures/Tables 6

Fig.1. Morphology and leakage resistance of three kinds of composite garbage bags

Fig.2. SEM images of the composite films

Fig.3. XRD patterns of the composite films

Fig.4. Thermal performance of the composite films

Fig.5. Mechanical properties of the composite films

Fig.6. Cost of the composite films

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