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A kind of modified polylactic acid composite material containing peach gum powder and preparation method thereof
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A composite material and polylactic acid technology, applied in the field of biomedical polymer composite materials, can solve the problems of poor toughness, slow degradation rate and high cost, and achieve the effects of improving toughness characteristics, improving mechanical strength and avoiding pain.
Inactive Publication Date: 2016-01-20
SHANGHAI INST OF TECH
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[0005] One of the objectives of the present invention is to provide a modified polylactic acid composite material containing peach gum powder in order to solve the above-mentioned shortcomings of pure polylactic acid, such as poor toughness, slow degradation rate, and high cost, to replace pure polylactic acid. The powder-modified polylactic acid composite material has greater tensile strength and elongation at break than pure polylactic acid. At the same time, it also has the characteristics of low production cost due to the addition of recyclable and renewable peach gum resources.
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Embodiment 1
[0034] A modified polylactic acid composite material containing peach gum powder, calculated in parts by weight, its composition and content are as follows:
[0038] The polylactic acid is a high-molecular-weight poly-L-lactic acid for spinning, and its number-average molecular weight is 100,000 Da;
[0039] The number average molecular weight of the polyethylene glycol is 6000Da.
[0040] The above-mentioned preparation method of a modified polylactic acid composite material containing peach gum powder specifically comprises the following steps:
[0041] (1) Put the dried peach gum into a pulverizer and crush it into powder, pass through a 100-mesh sieve to get peach gum powder, and then put it in a vacuum oven at 60°C for drying;
[0042] (2) Add polyethylene glycol, polylactic acid dried in vacuum at 80°C for 4 hours, and the dried peach gum powder obtained in st...
Embodiment 2
[0047] A modified polylactic acid composite material containing peach gum powder, calculated in parts by weight, its composition and content are as follows:
[0051] The polylactic acid is a high-molecular-weight poly-L-lactic acid for spinning, and its number-average molecular weight is 100,000 Da;
[0052] The number average molecular weight of the polyethylene glycol is 6000Da.
[0053] The above-mentioned preparation method of a modified polylactic acid composite material containing peach gum powder is the same as in Example 1.
Embodiment 3
[0055] A modified polylactic acid composite material containing peach gum powder, calculated in parts by weight, its composition and content are as follows:
[0059] The polylactic acid is a high-molecular-weight poly-L-lactic acid for spinning, and its number-average molecular weight is 100,000 Da;
[0060] The number average molecular weight of the polyethylene glycol is 6000Da.
[0061] The above-mentioned preparation method of a modified polylactic acid composite material containing peach gum powder is the same as in Example 1.
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Abstract
The invention discloses a modified polylactic acidcomposite material containing peach gum powder and a preparation method thereof. The modified polylactic acidcomposite material containing peach gum powder is calculated in parts by weight from 100 parts of polylactic acid, 1-5 parts of polyethylene It consists of diol and 0.5-10 parts of peach gum powder. The preparation method is to add polyethylene glycol, polylactic acid and peach gum powder to a torque rheometer, control the temperature at 165 ° C, and carry out melt blending at a speed of 50 rpm for 10 minutes to obtain a blend of polylactic acid, polyethylene glycol and peach gum powder After the product was placed in a standard sample mold, the temperature was controlled at 165°C in a hot pressmolding machine, and the molding pressure was 10 MPa. After hot pressing for 3 minutes and cold pressing for 3 minutes with circulating water, the modified polylactic acid composite material containing peach gum powder was obtained. The peach gum powder-modified polylactic acid composite material has greater tensile strength and elongation at break than pure polylactic acid, and at the same time, because of the addition of recyclable and renewable peach gum resources, it also has the characteristics of low production cost .
Description
technical field [0001] The invention relates to the field of biomedical polymer composite materials, in particular to a polylactic acid composite material modified with natural polymer material peach gum powder. That is, polylactic acid / polyethylene glycol / peach gum powder composite material, and the preparation method of the composite material. Background technique [0002] At present, polymer materials have penetrated into all fields of the national economy and all aspects of human life. However, at the same time, the oil crisis is becoming more and more serious, and plastic waste is increasing day by day, which has caused sustainable development and environmental problems that cannot be ignored. With the continuous development of society and the continuous progress of human civilization, people's awareness of environmental protection is getting deeper and deeper. Therefore, scientists have done a lot of work in developing biodegradable and non-polluting biomaterials to ...
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