Chopped hemp/carbon fiber/thermoplastic polymer composite sheet

A thermoplastic polymer and chopped carbon fiber technology, which is applied in the field of composite materials, can solve the problems of difficult processing of chopped carbon fiber and thermoplastic polymer mixing, difficult quality control, and weak mechanical properties of composite material boards, achieving outstanding composite effects , Impact strength improvement, performance improvement effect

Active Publication Date: 2019-08-02
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies existing in the prior art, the object of the present invention is to provide a kind of chopped hemp fiber / carbon fiber / thermoplastic polymer composite material plate, to solve the mechanical properties of the chopped hemp fiber / carbon fiber / thermoplastic polymer composite material plate is not strong And other issues
[0006] The invention also provides a preparation method of the chopped hemp fiber / carbon fiber / thermoplastic polymer composite material plate, which solves the problems of difficult processing and quality control of chopped plant fiber, chopped carbon fiber and thermoplastic polymer

Method used

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  • Chopped hemp/carbon fiber/thermoplastic polymer composite sheet
  • Chopped hemp/carbon fiber/thermoplastic polymer composite sheet
  • Chopped hemp/carbon fiber/thermoplastic polymer composite sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Soak the chopped ramie fiber with 2% sodium hydroxide aqueous solution for 24 hours, then wash it with deionized water and dry it. Take by weighing the above-mentioned chopped ramie fibers of 10g, 1.0g maleic anhydride grafted polyethylene and 50g low-density polyethylene, put into a double-roller mill and mix into a composite sheet material, i.e. sheet material I, wherein the double-roller The temperature of the front roll of the mill is 115°C, and the temperature of the rear roll is 110°C; weigh 5g of carbon fiber, 1.0g of maleic anhydride grafted polyethylene, and 50g of low-density polyethylene, and then put them into a two-roller mill and knead to form a compound The sheet of material is Sheet II. Among them, the temperature of the front roll of the double-roll mill is 115°C, the temperature of the rear roll is 110°C, and the time is 12 minutes; after cutting the sheet I and sheet II according to the size of the mold, put the sheet II on the two sheets Between I, ...

Embodiment 2

[0026] Soak the chopped ramie fiber with 2% sodium hydroxide aqueous solution for 24 hours, then wash it with deionized water and dry it. Take by weighing the above-mentioned chopped ramie fibers of 10g, 1.0g maleic anhydride grafted polyethylene and 50g low-density polyethylene, put into a double-roller mill and mix into a composite sheet material, i.e. sheet material I, wherein the double-roller The temperature of the front roll of the mill is 115°C, and the temperature of the rear roll is 110°C; weigh 5g of carbon fiber, 1.0g of maleic anhydride grafted polyethylene, and 50g of low-density polyethylene, and then put them into a two-roller mill and knead to form a compound The sheet of material is Sheet II. Among them, the temperature of the front roll of the double-roll mill is 115°C, the temperature of the rear roll is 110°C, and the time is 10 minutes; after cutting the sheet I and sheet II according to the size of the mold, put the sheet I on two sheets Between II, make...

Embodiment 3

[0028] Soak the chopped ramie fiber with 2% sodium hydroxide aqueous solution for 24 hours, then wash it with deionized water and dry it. Take by weighing 10g of the above-mentioned chopped ramie fiber, 5g of carbon fiber, 2.0g of maleic anhydride grafted polyethylene, and 100g of low-density polyethylene and mix them into composite material sheets in a double-roll mill, wherein the front of the double-roll mill The roll temperature is 115°C, the back roll temperature is 110°C, and the time is 10 minutes. After the composite sheet is cut according to the size of the mold, it is placed in a flat vulcanizer and hot-pressed into a board. The hot-pressing temperature is 140°C and the time is 10 minutes.

[0029] The mechanical properties of the three different composite material plates prepared in Examples 1-3 were compared, as shown in Table 1.

[0030] Table 1

[0031]

[0032] It can be seen from Table 1 that the impact strength, tensile strength and fracture strength of t...

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Abstract

The invention discloses a chopped ramie fiber / carbon fiber / thermoplastic polymer composite plate. The composite plate is of a sandwich structure and manufactured by thermally pressing an upper surface layer, a lower surface layer and an intermediate core layer, wherein the upper surface layer and the lower surface layer are chopped ramie fiber / thermoplastic polymer sheets; and the intermediate core layer is a chopped carbon fiber / thermoplastic polymer sheet. According to the chopped ramie fiber / carbon fiber / thermoplastic polymer composite plate, the ramie fiber and the carbon fiber are correspondingly mixed with half amount of thermoplastic polymer to form sheets, and then the sheets are overlapped and pressed to form a special sandwich structure, so that the problem of difficulty in mixing of the thermoplastic polymer and plant fiber and the carbon fiber can be effectively solved; and the plant fiber and the carbon fiber can be uniformly dispersed in the thermoplastic polymer, and thus the performances of the composite material can be improved. The chopped ramie fiber / carbon fiber / thermoplastic polymer composite plate has the characteristics of being simple in technical processes, and simple to operate. The prepared chopped fiber / thermoplastic polymer composite plate integrates a plurality of advantages of the carbon fiber, the plant fiber and the thermoplastic fiber, and is outstanding in mechanical property, recoverable, and degradable; and the preparation method is simple to operate.

Description

technical field [0001] The invention relates to a polymer composite material board and a preparation method thereof, in particular to a chopped hemp fiber / carbon fiber / thermoplastic polymer composite material board and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] In recent years, with the lightweight of automotive materials and the vigorous development of new energy vehicles, the use of polymer matrix composite sheets with carbon fiber as reinforced materials in the automotive industry has increased rapidly, and the scope of application has changed from traditional automotive exterior parts to , interior parts, and air-conditioning parts are extended to structural parts including engines and chassis, and many other components. [0003] At present, the composite materials used in the automotive industry are mainly carbon fiber (long fiber) reinforced thermosetting polymer matrix composite materials. In addition to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/02B32B9/04B32B27/12B32B27/32B32B33/00B32B37/06C08L23/06C08L97/02C08L51/06C08K7/06B29B7/72B29C35/00B29C35/02
CPCB29B7/728B29C35/007B29C35/02B32B5/02B32B5/08B32B5/26B32B9/02B32B9/047B32B27/12B32B27/32B32B33/00B32B37/06B32B2250/20B32B2262/0253B32B2262/065B32B2262/106B32B2307/54B32B2307/558C08K2201/004C08L23/06C08L2205/03C08L2205/05C08L2205/08C08L2205/16C08L2207/066C08L97/02C08L51/06C08K7/06
Inventor 盛旭敏谭伟文吴承操李又兵
Owner CHONGQING UNIV OF TECH
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