Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material

A composite material and all-biological technology, which is applied in the field of preparation of PBAT/PLA/CaCO3 fully biodegradable composite materials, can solve the problems of composite materials such as the decline in mechanical properties, poor interface compatibility, and easy aggregation of inorganic powders to achieve good appearance and Mechanical properties, beneficial to market promotion, the effect of excellent mechanical properties

Pending Publication Date: 2022-03-22
ANHUI UNIVERSITY
1 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, due to the poor interfacial compatibility of the three materials, and the problems of easy agglomeration and poor dispersion of the inor...
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Abstract

The invention discloses a preparation method of a PBAT/PLA/CaCO3 full-biodegradable composite material, PBAT, PLA and calcium carbonate are used as main raw materials, the inherent biodegradable property of the raw materials is not destroyed, and the material has the advantage of complete biodegradability. The introduction of a small amount of PLA endows the composite material with high strength, and the addition of calcium carbonate greatly reduces the production cost of the composite material while improving the strength of the composite material, is beneficial to industrial production, and achieves the purposes of environmental protection and energy saving; the processing technology of the composite material is simple, and a compatilizer and a plasticizer do not need to be added.

Technology Topic

Calcium carbonatePlasticizer +5

Image

  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material
  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material
  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material

Examples

  • Experimental program(8)

Example Embodiment

[0032] Example 1:
[0033] PBAT / PLA / CACO 3 Full biological degradation composite, including the following steps:
[0034] (1) Preparation of modified inorganic filler: 20 parts of calcium carbonate at 80 ° C for 12 h in vacuum drying tank, dry 0.20 parts of titanate coupling agent at a high speed mixer 20 min, to obtain activated carbonated calcium.
[0035] (2) Preparation of PBAT-based full degradation materials: 75 parts of PBAT, 5 parts of PLA were dried in a vacuum drying box for 12 h, and 0.75 parts of ADR chain extenders were added to the dry PBAT, and mixed uniform mixed filling In the machine, the transmissor speed is 50R / min, the temperature is 170 ° C, and the time is 5 min; then use the unfamiliarization machine and the microjection machine to prepare the dumbbell type splines after chain of different mass ratios, PBAT, PLA and CaCO3 blended injection molding The miger rotational speed is 50R / min, the temperature is 170 ° C, the time is 10 min; the temperature of the microjection is 190 ° C, the injection pressure is 35 MPa, and the injection time is 10s.
[0036] The tensile results show: Young's modulus is 130 MPa; tensile strength is 17.45 MPa, and the elongation of the elongation is 252%.

Example Embodiment

[0037] Example 2:
[0038] PBAT / PLA / CACO 3 Full biological degradation composite, including the following steps:
[0039] (1) Preparation of modified inorganic filler: Take 25 parts of calcium carbonate at 80 ° C for 12 h in a vacuum drying tank, and then add 0.25 parts of a titanate coupling agent at a high-speed mixer for 20 minutes to obtain activated carbonated calcium.
[0040](2) Preparation of PBAT-based complex degradation materials: 70 parts of PBAT, 5 parts of PLA were dried in a vacuum drying tank for 12 h, and 0.7 parts of the ADR chain extender was added to the dry PBAT, mixed with uniform filters. In the machine, the transmissor speed is 50R / min, the temperature is 170 ° C, and the time is 5 min; then use the unfamiliarization machine and the microjection machine to prepare the dumbbell type splines after chain of different mass ratios, PBAT, PLA and CaCO3 blended injection molding The miger rotational speed is 50R / min, the temperature is 170 ° C, the time is 10 min; the temperature of the microjection is 190 ° C, the injection pressure is 35 MPa, and the injection time is 10s.
[0041] The tensile results show: Young's modulus is 140 MPa; tensile strength is 18.31 MPa, and the elongation at break is 209%.

Example Embodiment

[0042] Example 3:
[0043] PBAT / PLA / CACO 3 Full biodegradation composite materials and preparation methods, including the following steps:
[0044] (1) Preparation of modified inorganic filler: 30 parts of calcium carbonate at 80 ° C for 12 h in a vacuum drying tank, drying 0.3 parts of a titanate coupling agent at a high speed mixer 20 min, to obtain activated carbonated calcium.
[0045] (2) Preparation of PBAT-based full degradation materials: First, 65 parts of PBAT, 5 parts of PLA were dried in a vacuum drying box for 12 h, and 0.65 parts of ADR chain extenders were added to the dry PBAT, and mixed uniform mixed filling In the machine, the mixer speed is 50R / min, the temperature is 170 ° C, the time is 5 min; then use the buttons and miniature injection molding machines to block different mass ratios, PBAT, PLA and CACO 3 Blend molding preparation dumbbell type spline, butt machine speed 50R / min, temperature 170 ° C, time 10 min; miniature injection molding machine temperature 190 ° C, injection pressure 35MPa, injection time is 10s.
[0046] The tensile results show that the Young's modulus is 171 MPa; the tensile strength is 19.27 MPa, the elongation of the break is 156%, and the performance is excellent in performance.

PUM

PropertyMeasurementUnit
Young's modulus130.0MPa
Tensile strength17.45MPa
Young's modulus140.0MPa

Description & Claims & Application Information

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