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Functional cyclodextrin flame-retarding polylactic acid composite material and preparation method thereof

A composite material and cyclodextrin technology, applied in the field of flame-retardant polylactic acid composite materials, can solve the problems of large pollution in the preparation process, low flame-retardant efficiency, and damage to the mechanical properties of the matrix material, and achieve simple and easy preparation process, high resistance Fuel efficiency, pollution-free preparation process

Active Publication Date: 2015-04-29
无锡御束生物材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a functionalized cyclodextrin flame-retardant polylactic acid composite material and its preparation method to overcome the large pollution of the preparation process in the field of flame-retardant polylactic acid materials, low flame-retardant efficiency, and damage to the mechanical properties of the matrix material. Performance and other defects, expanding the application field of cyclodextrin

Method used

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  • Functional cyclodextrin flame-retarding polylactic acid composite material and preparation method thereof
  • Functional cyclodextrin flame-retarding polylactic acid composite material and preparation method thereof
  • Functional cyclodextrin flame-retarding polylactic acid composite material and preparation method thereof

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preparation example Construction

[0026] The preparation method of the functionalized cyclodextrin flame-retardant polylactic acid composite material provided by the present invention can refer to figure 1 A schematic diagram of the preparation process, including the following steps:

[0027] a) Add a certain proportion of cyclodextrin, phosphorus-containing dibasic acid and catalyst into deionized water, mix evenly, heat to a certain temperature, cool after a certain period of time, wash with water, and dry to obtain a functionalized cyclodextrin flame retardant agent; cyclodextrin is preferably α-cyclodextrin, β-cyclodextrin or γ-cyclodextrin, and the phosphorus-containing dibasic acid preferably has the following chemical structure:

[0028]

[0029] The catalyst is preferably disodium hydrogen phosphate or sodium dihydrogen phosphate, the molar ratio of cyclodextrin and phosphorus-containing dibasic acid is preferably 1:1 to 1:6, and the molar ratio of cyclodextrin and catalyst is preferably 5:1 to 1 :...

Embodiment 1

[0033] Weigh 0.1mol of α-cyclodextrin, 0.6mol of phosphorus-containing dibasic acid A and 0.3mol of sodium dihydrogen phosphate, add them to 1000ml of deionized water, stir until the mixture is even, place at 130°C for 5 hours, and cool to room temperature, washed with deionized water, dried, and set aside. The polylactic acid resin and the functionalized cyclodextrin were dried in an oven at 80°C for more than 12 hours, then mixed uniformly in a twin-screw extruder according to 95:5 (mass ratio), and then extruded, granulated and After drying, the functionalized cyclodextrin flame-retardant polylactic acid composite material is obtained.

Embodiment 2

[0035] Weigh 0.1mol of β-cyclodextrin, 0.3mol of phosphorus-containing dibasic acid B and 0.1mol of sodium dihydrogen phosphate, add them to 1000ml of deionized water, stir until the mixture is even, place at 140°C for 4 hours, and cool to room temperature, washed with deionized water, dried, and set aside. The polylactic acid resin and the functionalized cyclodextrin were dried in an oven at 80°C for more than 12 hours, then mixed uniformly in a twin-screw extruder according to 90:10 (mass ratio), and then extruded, granulated and After drying, the functionalized cyclodextrin flame-retardant polylactic acid composite material is obtained.

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Abstract

The invention provides a functional cyclodextrin flame-retarding polylactic acid composite material and a preparation method thereof. The functional cyclodextrin flame-retarding polylactic acid composite material is prepared from cyclodextrin, phosphorus containing binary acid, a catalyst and polylactic resin according to the following steps: (a) adding the cyclodextrin, the phosphorus containing binary acid and the catalyst at a certain ratio into deionized water, uniformly mixing, heating to a certain temperature, reacting for a certain time, cooling, washing by water and drying to obtain a functional cyclodextrin fire retardant; (b) mixing the polylactic resin with the functional cyclodextrin fire retardant in a certain ratio to obtain the functional cyclodextrin flame-retarding polylactic acid composite material. According to the preparation method disclosed by the invention, the functional cyclodextrin is used for preparing the flame-retarding polylactic acid composite material; the used fire retardant is environmentally friendly; the preparation process is simple and easy to implement; relatively high fire retarding efficiency is achieved; meanwhile, the mechanical properties of the polylactic acid material is not damaged; the preparation method is suitable for developing a novel environment-friendly flame-retarding polylactic acid material.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polylactic acid composite materials, and in particular relates to a functionalized cyclodextrin flame-retardant polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. Its preparation raw materials come from a wide range of sources (such as corn, cassava, etc.), and the product can be biodegraded to achieve a harmless cycle in nature, so it is an ideal green polymer material. . Polylactic acid has good physical and mechanical properties, easy processing, and biocompatibility, so it has been widely used in agriculture, medical devices, and packaging materials in recent years. With the further expansion of the application field of polylactic acid to auto parts and electronic and electrical components, its shortcomings such as flammability and severe melting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L5/16C08B37/16
Inventor 汪竹青王敏吴根华
Owner 无锡御束生物材料科技有限公司
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