Preparation method of reinforced polylactic acid composite material for ramie-fabric

A composite material and fabric reinforcement technology, used in textiles, papermaking, fiber processing, etc., can solve the problems of interface problems that have not been well solved and cannot be solved, and achieve the effect of excellent interface properties and mechanical properties.

Inactive Publication Date: 2006-11-29
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the resin matrix they choose is the same as that of Sun Yat-sen University, which is a non-biodegradable resin. In addition, the above-mentioned patents do not solve the interface problem between the hemp fiber and the matrix resin very well.
[0004] Foreign research on natural fiber composites started earlier, but the reinforced matrix is ​​mainly non-degradable resin, and the interface problem has not been well resolved.

Method used

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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  • Preparation method of reinforced polylactic acid composite material for ramie-fabric
  • Preparation method of reinforced polylactic acid composite material for ramie-fabric
  • Preparation method of reinforced polylactic acid composite material for ramie-fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh polylactic acid (PLLA) with a viscosity-average molecular weight of 27,000 and polycaprolactone (PCL) with a viscosity-average molecular weight of 1000 with a weight ratio of 7:3, and make them into 0.1g / ml chloroform solutions respectively, and then KH550-treated ramie fabrics accounting for 45% by weight of the total were soaked in a chloroform solution of PCL, and then they were poured into a 1000 ml glass reactor and sealed. Magnetic stirring was carried out in a constant temperature water bath at 80°C for 4 hours, and the prepreg layer was laminated into a sample strip.

[0025] Tensile

Embodiment 2

[0027] Take by weighing the PLLA that the viscosity-average molecular weight of 1:1 is 1000 and the PCL that the viscosity-average molecular weight is 2000, they are respectively made into the acetone solution of 0.1g / ml, will account for the ramie fabric of 35% of gross weight afterwards soak in PCL in acetone solution, and then pour them into a 1000ml glass reactor and seal it well. Magnetically stir the reaction in a constant temperature water bath at 60°C for 4 hours, pour out the product, evaporate the solvent, and place it in a vacuum oven for 24 hours to obtain a prepreg. According to the above method, the fabric content is respectively 45%, 55%, 65%, and 75% ramie fabric reinforced PLA-PCL composite material, and then laminated into standard splines at 170 ° C on a flat vulcanizer. The measured mechanical properties are as follows: Table 2.

[0028] fabric

Embodiment 3

[0030] Weigh PLLA with a viscosity-average molecular weight of 80,000 and a viscosity-average molecular weight of 400 with a weight ratio of 9:1, and make them respectively into 0.1 g / ml tetrahydrofuran solution, and then account for 75% of the total weight of KH560. The ramie fabrics were soaked in the tetrahydrofuran solution of PCL, and then they were poured into a 1000ml glass reactor and sealed well. Magnetic stirring was carried out in a constant temperature water bath at 90°C for 4 hours, and the prepreg layer was laminated into a sample strip.

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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Abstract

A ramie fabric reinforced polylactic acid composition able to be fully biodegradated is prepared through respectively dissolving the polylocatic acid and polycaprolactone in organic solvent, treating the surface of ramie fabric, immersing it in said polycaprolactone solution, adding the solution of polylactic acid, sealing and in-situ polymerizing.

Description

technical field [0001] The invention relates to a preparation method of a high molecular polymer and a fabric-reinforced resin composite material, in particular to a preparation method of a ramie fabric-reinforced polylactic acid composite material. Background technique [0002] Lactic acid polymer (also known as: polylactic acid, Polylactic acid; abbreviation: PLA) is mainly produced from plant resources such as corn and potatoes. The polymer and post-processing products have good biodegradability and renewability. Ramie is also a biodegradable material, and it also has the advantages of high specific strength and abundant resources. Ramie-reinforced polylactic acid composites are in line with human environmental protection and sustainable development strategies, so they have very good application prospects. At present, there are more and more researches on natural fiber reinforced composite materials in the world, but they mainly focus on strengthening non-degradable ther...

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L67/04D06M13/513
Inventor 余木火刘训堃滕翠青韩克清
Owner DONGHUA UNIV
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