Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing straw/polymer film-oriented composite material

A technology of polymer film and composite material, applied in the field of green composite material manufacturing, can solve the problems of destroying the structure of wheat straw, damage to mechanical properties, etc., and achieve the effect of rational utilization of resources, high speed and environmental protection

Inactive Publication Date: 2013-09-04
DONGHUA UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing research on the preparation of composite materials from wheat straw, the vast majority is to crush wheat straw into fibers, and then mix it with matrix materials to prepare wheat straw / polylactic acid composite materials, which destroys the structure of wheat straw and makes its mechanical Performance suffers

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing straw/polymer film-oriented composite material
  • Method for preparing straw/polymer film-oriented composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Raw materials:

[0025] The straw is produced in Songjiang District, Shanghai, with a density of 0.055 grams per cubic centimeter, a tensile strength of 95.04 MPa, a tensile modulus of 3.02 gigaPascal, and an elongation at break of 1.71%.

[0026] The matrix material is polylactic acid resin particles provided by Nantong Jiuding Bioengineering Co., Ltd., with a density of 1.2 grams per cubic centimeter, a strength of 25.7 MPa, an initial tensile modulus of 1.52 GPa, and an elongation at break of 3.43%.

[0027] According to the density and mass of the two, the respective volumes are calculated to obtain the volume fraction of the two. Its component ratio is: the volume fraction of wheat straw is 20%; the volume fraction of polylactic acid film is 80%.

[0028] 2. Preparation method:

[0029] (1) Dry the wheat straw at 105°C for 1 hour to dryness, and flatten it with a vulcanizing machine for use.

[0030] (2) Place the polylactic acid resin particles between two p...

Embodiment 2

[0033] 1. Raw materials: the same as in Example 1. The volume fraction of wheat straw is 30%; the volume fraction of polylactic acid film is 70%.

[0034] 2. Preparation method:

[0035] (1) Dry the straw at 105°C for 1 hour to dryness, flatten it with a vulcanizer, and mechanically split the straw into four parts along its longitudinal direction to obtain a length of 18 cm-20 cm , straw fibers with a width of about 5 mm.

[0036] (2) Place the polylactic acid resin particles between two pieces of release paper, place the polylactic acid resin particles together with the release paper between two iron plates, and then place the iron plates on the upper and lower hot platens of the vulcanizer In between, turn on the vulcanizer, preheat at 125 °C for 3 minutes without pressure, then press for 1.5 minutes at a pressure of 1.5 MPa and a temperature of 125 °C, and finally press at a pressure of 0.6 MPa and a temperature of 45 °C Press down for 3 minutes, take out the iron plate,...

Embodiment 3

[0038] Example 3: Unidirectional Arrangement of Straw Polyethylene Resin Composite Material

[0039] 1. Raw materials:

[0040]The straw is produced in Songjiang District, Shanghai, with a density of 0.055 grams per cubic centimeter, a tensile strength of 95.04 MPa, a tensile modulus of 3.02 gigaPascal, and an elongation at break of 1.71%.

[0041] The polyethylene resin particles are produced by Yanshan Petrochemical Co., Ltd., with a density of 0.9 grams per cubic centimeter, a tensile strength of 20 MPa, and an elongation at break of 600%.

[0042] The volume fraction of straw is 20%; the volume fraction of polyethylene film is 80%.

[0043] 2. Preparation method:

[0044] (1) Dry the wheat straw at 105°C for 1 hour to dryness, and flatten it with a vulcanizing machine for use.

[0045] (2) Place the polyethylene resin particles between two pieces of release paper, place the polyethylene resin particles together with the release paper between two iron plates, and then pl...

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
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
tensile strengthaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a straw / polymer film-oriented composite material. The method is characterized by comprising the following steps: drying straws; preparing a polymer film; setting at least one straw layer and at least one polymer film layer obtained in the second step on the polymer film layer obtained in the second step in a layer-to-layer stacking form, wherein each straw layer is formed by arranging the straws obtained in the first step in parallel in a unidirectional mode, and the straw layer and the polymer film are alternatively arranged; arranging the straw layer and the polymer film between two pieces of demolding paper, putting the straw layer and the polymer film into a mold, feeding the straw layer and the polymer film into upper and lower hot-press plates of a vulcanizing machine, and pressing to obtain the straw / polymer film-oriented composite material. The straws are long straws which are not subjected to mechanical or chemical treatment, the physical and mechanical performances are not damaged, and excellent performance is provided for the composite material.

Description

technical field [0001] The invention relates to a method for preparing a composite material by using oriented wheat straw without chemical treatment and a polymer film, and belongs to the technical field of green composite material manufacturing. Background technique [0002] Environmental degradation, lack of resources and energy crisis have made mankind realize the importance and urgency of protecting the environment and effectively utilizing resources to achieve sustainable social and economic development. Composite materials occupy a place in the field of material science with irreplaceable advantages such as high strength and energy saving, but the waste, recycling and regeneration of many composite materials have brought about increasingly serious environmental problems. Solving the regeneration and recycling of composite materials and making them develop in the direction of environmental harmony is a hot research field for composite materials researchers at home and a...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/06C08L67/02C08L97/02B29C70/06B29C70/28B29C35/02
Inventor 许福军巫丽英刘玮邱夷平
Owner DONGHUA UNIV