A polylactic acid/starch intumescent flame-retardant composite material and its preparation method

A technology of intumescent flame retardant and composite material, which is applied in the field of polylactic acid/starch intumescent flame retardant composite material and its preparation, and can solve the problems of poor compatibility between starch and matrix plastic, poor thermal stability of starch, and inability to meet application requirements. , to achieve the effect of promoting carbon forming ability, high phosphorus content and high phosphorus content
CN106496975BActive Publication Date: 2019-02-15NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2019-02-15

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Abstract

The invention discloses a polylactic acid / starch expansion flame-resistant composite material with excellent flame resistance, and a preparation method thereof. The polylactic acid / starch expansion flame-resistant composite material is composed of, by weight, 60 to 89% of polylactic acid, 5 to 30% of an acid source, 5 to 30% of a modified starch, and 1 to 15% of a gas source. In a preferred embodiment, the modified starch is phosphorized maleic anhydride grafting modified starch (bio-based phosphorus containing starch). According to the preparation method, polylactic acid possesses excellent compatibility with the modified starch; synergistic effect of the acid source, the carbon source (the modified starch), and the gas source is capable of improving charring forming capability of the polylactic acid matrix, and improving high temperature stability and flame resistance of polylactic acid greatly. According to the preparation method, adoption of an existing double-screw extruder is enough for production; preparation is simple and convenient; and the preparation method is convenient for industrial production.
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Description

technical field

[0001] The invention relates to the technical field, in particular to a polylactic acid / starch swelling flame-retardant composite material and a preparation method thereof. Background technique

[0002] With the increasingly severe environmental problems and the oil crisis, people's research on sustainable materials has gradually increased. Bio-based materials, as fully biodegradable green materials, fully meet the current development needs and have received widespread attention. Among them, polylactic acid (PLA), as the bioplastic with the most development potential, has excellent mechanical properties and good processing performance, and is widely used in the automotive industry, electrical facilities and other fields. However, its flammability has greatly limited its promotion in these fields. At present, due to the advantages of low toxicity, environmental protection and smoke suppression, intumescent flame retardant has replaced the traditional halogen-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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