CN107310216A - Chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate - Google Patents

Chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate Download PDF

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Publication number
CN107310216A
CN107310216A CN201710530596.XA CN201710530596A CN107310216A CN 107310216 A CN107310216 A CN 107310216A CN 201710530596 A CN201710530596 A CN 201710530596A CN 107310216 A CN107310216 A CN 107310216A
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thermoplastic polymer
chopped
sheet stock
fiber
carbon fiber
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CN201710530596.XA
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CN107310216B (en
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盛旭敏
谭伟文
吴承操
李又兵
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Chongqing University of Technology
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Chongqing University of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B29B7/728—Measuring data of the driving system, e.g. torque, speed, power, vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/007—Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C08K2201/004—Additives being defined by their length
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08L2205/00—Polymer mixtures characterised by other features
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Abstract

It is sandwich structure the invention discloses a kind of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate, is made up of upper and lower top layer and intermediate core layer hot pressing；The upper and lower top layer is chopped ramie fiber/thermoplastic polymer sheets material, and intermediate core layer is chopped carbon fiber/thermoplastic polymer sheets material.The present invention overlaps compacting again after mixing flaxen fiber, carbon fiber in flakes with the thermoplastic polymer of 1/2nd consumptions respectively have special sandwich structure, efficiently solve the problem of thermoplastic polymer is with string and difficult carbon fiber batch mixing, string and carbon fiber is set to be uniformly dispersed in thermoplastic polymer, so as to improve the performance of composite.Simplify with technical process, operate simpler feature.Chopped strand/thermoplastic polymer composite material produced by the present invention has the multiple advantage of carbon fiber, string and thermoplastic polymer concurrently, and mechanical property is splendid, recyclable, and degradable, preparation method is simple to operate.

Description

Chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate
Technical field
The present invention relates to a kind of polymer composites plate and preparation method thereof, and in particular to a kind of chopped ramie fiber/carbon Fiber/thermoplastic polymer composites plate and preparation method thereof, belongs to field of compound material.
Background technology
In recent years, with the lightweight of vehicle material and flourishing for new-energy automobile, using carbon fiber as reinforcing material Polymer matrix composite sheet material consumption in the automotive industry rise rapidly, application is from the traditional exterior trim of automobile All multiple components such as the structural member that part, inside gadget, air-conditioning part are expanded to including engine and chassis.
The composite that current automobile industry is used is based on fine (long fine) the enhancing thermoset polymer matrix composite of carbon. And the prior development direction of automobile-used high polymer material from now on is in addition to lightweight, high performance, the feature of environmental protection to material and it can return The property received is it is also proposed that requirements at the higher level.Thermoplastic polymer is compared with thermosetting polymer, with good recuperability；With flaxen fiber There is Biodegradable for the string of representative, the degraded of composite scrap thing can be accelerated, with the preferable feature of environmental protection. If string be used in mixed way in thermoplastic polymer with carbon fiber, performance can be taken into account, it is environmentally friendly and it is recyclable will Ask, have broad application prospects in automobile industry.
Compared with long fibre/polymer composites, chopped strand/polymer composites with more automated production and Cost advantage.As a rule, chopped strand includes the shorter inorfil and organic fiber of all length, chopped strand be by Long fibre is chopped through fibre cutting equipment and formed, and its scope covers the shorter inorganic or organic fiber of all length.But, will be short The composite panel mechanical property prepared after fiber, chopped carbon fiber are directly mixed with thermoplastic polymer that cuts plant is not made us It is satisfied.Main reason is that：Chopped string, chopped carbon fiber easily assemble agglomerating, and both add thermoplastic poly simultaneously Batch mixing difficulty can be caused to increase in compound, and be difficult to be uniformly dispersed in thermoplastic polymer, so that composite panel performance Deterioration.
The content of the invention
For deficiencies of the prior art, it is an object of the invention to provide a kind of chopped ramie fiber/carbon fiber/ Thermoplastic polymer composite material plate, solves the mechanical property of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate Not strong the problems such as.
The present invention also provides the preparation method of the chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate, solves Be chopped string, chopped carbon fiber and thermoplastic polymer composition's processing difficulties, the problem of quality is difficult to control to.
To achieve the above object, the present invention is adopted the following technical scheme that：A kind of cast tow cuts fiber/carbon fiber/thermoplastic poly Compound composite material plate, it is characterised in that be sandwich structure, be made up of upper and lower top layer and intermediate core layer hot pressing；It is described upper and lower Top layer is chopped ramie fiber/thermoplastic polymer sheets material, and intermediate core layer is chopped carbon fiber/thermoplastic polymer sheets material.
Further, the chopped ramie fiber/thermoplastic polymer sheets material is polymerize by chopped ramie fiber, bulking agent and thermoplasticity Thing is 10 by weight：1.0-2.0：50 raw material mixing is formed；The chopped carbon fiber/thermoplastic polymer sheets material is by being chopped Carbon fiber, bulking agent and thermoplastic polymer are 5 by weight：1.0-2.0：50 mixings are formed.
The thermoplastic polymer uses low density polyethylene (LDPE), and the bulking agent is maleic anhydride grafted polyethylene.
The present invention also provides a kind of preparation method of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate, wraps Include following steps：
1) by flaxen fiber, with the sodium hydrate aqueous solution immersion 24h (alkali process) of mass concentration 2%, clean dry is standby afterwards；
2) flaxen fiber, bulking agent and thermoplastic polymer are kneaded into composite sheet stock in two-roll mill and obtains sheet stock I, its component is matched ibid；
3) carbon fiber, bulking agent and thermoplastic polymer are kneaded into composite sheet stock in two-roll mill and obtains sheet stock II, its component is matched ibid；
4) sheet stock I, sheet stock II are cut by die size, sheet stock II is placed between two sheet stock I, it is overlapped into " piece Expect I- sheet stock II- sheet stocks I " sandwich structure, then put it into pressing die, be placed in hot-forming in vulcanizing press, hot pressing Temperature is according to thermoplastic polymer Mold Temperatures set.
And chopped strand is belonged to the present invention relates to chopped ramie fiber and chopped carbon fiber, wherein flaxen fiber length is 5- 10mm, carbon fiber length is 5-8mm.Wherein, chopped ramie fiber includes but is not limited to the strings such as ramie, flax or bluish dogbane； The chopped carbon fiber is T300, T400 or T600 chopped strand.
Compared with prior art, the present invention has the advantages that：
1st, composite effect is protruded：Chopped ramie fiber/carbon fiber of the present invention/thermoplastic polymer composite material plate has is special Sandwich structure, i.e. chopped ramie fiber/thermoplastic polymer sheets material is used as the top layer of composite panel, chopped carbon fiber/thermoplastic Property polymeric sheet material as composite panel sandwich layer；And composite panel has carbon fiber, string and thermoplastic poly concurrently The multiple advantage of compound.Compared with conventional composite materials plate, its tensile strength, impact strength are significantly improved, wherein impact is strong Degree is substantially better than the composite panel for being directly mixed with flaxen fiber, carbon fiber with thermoplastic polymer.Make its composite Performance reaches optimum efficiency, and wherein impact strength is up to 21.85KJ/ ㎡, elongation at break 41.1%, tensile strength 11.59MPa.The features such as mechanical property, environmental protection is taken into account, is had broad application prospects in automobile industry.
2nd, technique is easy：Thermoplastic polymer of the present invention by flaxen fiber, carbon fiber respectively with 1/2nd consumptions is mixed Overlapping compacting after in flakes again has special sandwich structure, efficiently solves thermoplastic polymer and string and carbon fiber are mixed The problem of material is difficult, makes string and carbon fiber are uniformly dispersed in thermoplastic polymer, so as to improve the property of composite Energy.Simplify with technical process, operate simpler feature.
Embodiment
The present invention is described in further detail with reference to specific embodiment.
First, chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate of the present invention
Chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate is sandwich structure, by upper and lower top layer and centre Sandwich layer hot pressing is made；The upper and lower top layer be chopped ramie fiber/thermoplastic polymer sheets material, intermediate core layer be chopped carbon fiber/ Thermoplastic polymer sheets material.The chopped ramie fiber/thermoplastic polymer sheets material is by chopped ramie fiber, bulking agent and thermoplastic poly Compound is 10 by weight：1.0-2.0：50 raw material mixing is formed；The chopped carbon fiber/thermoplastic polymer sheets material is by short It is 5 by weight to cut carbon fiber, bulking agent and thermoplastic polymer：1.0-2.0：50 mixings are formed.
2nd, the preparation of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate of the present invention and technique are preferred
Embodiment 1
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 12min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 12min.
Embodiment 2
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock I is placed between 2 sheet stock II, it is overlapped into " sheet stock II- sheet stock I- sheet stocks II " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, when Between be 10min.
Embodiment 3
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.Weigh the above-mentioned chopped ramees of 10g, 5g carbon fibers, 2.0g maleic anhydride grafted polyethylenes, 100g low density polyethylene (LDPE)s Composite sheet stock is kneaded into two-roll mill, wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 DEG C, when Between be 10min.After composite sheet stock is cut by die size, it is placed in vulcanizing press and is hot pressed into plate, hot pressing temperature is 140 DEG C, the time is 10min.
The mechanical property of three kinds of different composite panels made from embodiment 1-3 is contrasted, as shown in table 1.
Table 1
As it can be seen from table 1 using chopped ramie fiber/thermoplastic polymer sheets material as top layer, with chopped carbon fiber/thermoplastic Property polymeric sheet material is used as the mechanics such as impact strength, tensile strength and the elongation at break of sandwich structure composite material plate of sandwich layer Performance is better than composite panel prepared by routine techniques.
Embodiment 4
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.10g above-mentioned chopped ramee and 50g low density polyethylene (LDPE)s are weighed, places into and composite wood is kneaded into two-roll mill Tablet material is sheet stock I, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 DEG C；Weigh 5g carbon fibers and 50g is low Density polyethylene, places into and composite sheet stock i.e. sheet stock II is kneaded into two-roll mill.The wherein preliminary roller of two-roll mill Temperature is 115 DEG C, and rear roll temperature is 110 DEG C, and the time is 15min；After sheet stock I, sheet stock II are cut by die size, then by piece Material II is placed between 2 sheet stock I, and being overlapped into it, " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press In be hot pressed into plate, hot pressing temperature is 140 DEG C, and the time is 15min.
Embodiment 5
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 12min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 12min.
Embodiment 6
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 2.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 2.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
The mechanical property of three kinds of different composite panels made from embodiment 4-6 is contrasted, as shown in table 2
Table 2
From table 2 it can be seen that when the consumption of bulking agent maleic anhydride grafted polyethylene is 1.0g, the composite panel of preparation It is optimal in mechanical properties such as impact strength, tensile strength and elongation at breaks.
Embodiment 7
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 12min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 12min.
Embodiment 8
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride inoculated polypropylenes and 50g polypropylene are weighed, double roller mill is placed into It is sheet stock I that composite sheet stock is kneaded into machine, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 DEG C；Weigh 5g carbon fibers, 1.0g maleic anhydride inoculated polypropylenes, 50g polypropylene, place into and composite material sheet are kneaded into two-roll mill Material is sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, and the time is 10min；By sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II are placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stocks II- Sheet stock I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 170 DEG C, and the time is 10min.
The mechanical property for implementing two kinds of different composite panels made from 7-8 is contrasted, as shown in table 3
Table 3
From table 3 it can be seen that when thermoplastic polymer is low density polyethylene (LDPE), the composite panel of preparation is strong in impact The composite panel that degree and elongation at break are prepared when being greatly polypropylene better than thermoplastic polymer.
Embodiment 9
Chopped ramee concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped ramees of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
Embodiment 10
Chopped bastose concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped bastoses of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
Embodiment 11
Chopped flax fiber concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped flax fibers of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
Embodiment 12
Chopped sisal fiber concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped sisal fibers of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
Embodiment 13
Chopped kenaf concentration is soaked into 24h for 2% sodium hydrate aqueous solution, then is washed with deionized water net, dry It is dry.The above-mentioned chopped kenaves of 10g, 1.0g maleic anhydride grafted polyethylenes and 50g low density polyethylene (LDPE)s are weighed, is placed into double It is sheet stock I that composite sheet stock is kneaded into roller mill, and wherein two-roll mill preliminary roller is 115 DEG C, and rear roll temperature is 110 ℃；5g carbon fibers, 1.0g maleic anhydride grafted polyethylenes, 50g low density polyethylene (LDPE)s are weighed, places into two-roll mill and mixes It is smelt composite sheet stock i.e. sheet stock II.Wherein the preceding roll temperature of two-roll mill is 115 DEG C, and rear roll temperature is 110 DEG C, time For 10min；Sheet stock I, sheet stock II are pressed after die size cutting, then sheet stock II is placed between 2 sheet stock I, it is overlapped into " sheet stock I- sheet stock II- sheet stocks I " sandwich structure, is placed in vulcanizing press and is hot pressed into plate, and hot pressing temperature is 140 DEG C, time For 10min.
Embodiment 9-13 illustrate chopped ramie fiber of the present invention include but is not limited to ramie, bluish dogbane, flax, fiber, The string such as sisal hemp and mestha, the composite panel for preparation is in power such as impact strength, tensile strength and elongation at breaks Learn performance suitable.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to skill of the invention Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this Among the right of invention.

Claims (7)

1. chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate, it is characterised in that be sandwich structure, by upper and lower Top layer and intermediate core layer hot pressing are made；The upper and lower top layer is chopped ramie fiber/thermoplastic polymer sheets material, and intermediate core layer is Chopped carbon fiber/thermoplastic polymer sheets material.
2. chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate according to claim 1, it is characterised in that institute It is 10 by weight by chopped ramie fiber, bulking agent and thermoplastic polymer to state chopped ramie fiber/thermoplastic polymer sheets material： 1.0-2.0：50 raw material mixing is formed；The chopped carbon fiber/thermoplastic polymer sheets material by chopped carbon fiber, bulking agent and Thermoplastic polymer is 5 by weight：1.0-2.0：50 mixings are formed.
3. chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate according to claim 1, it is characterised in that institute Chopped ramie fiber is stated for ramie, flax or bluish dogbane；The chopped carbon fiber is T300, T400 or T600 chopped strand.
4. chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate according to claim 1, it is characterised in that institute State thermoplastic polymer and use low density polyethylene (LDPE), the bulking agent is maleic anhydride grafted polyethylene.
5. a kind of preparation method of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate, it is characterised in that including Following steps：
1）Flaxen fiber is standby with clean dry after the sodium hydrate aqueous solution immersion 24h of mass concentration 2%；
2）Flaxen fiber, bulking agent and thermoplastic polymer are kneaded into composite sheet stock in two-roll mill and obtain sheet stock I, Its component proportioning is got the raw materials ready as described in claim 2；
3）Carbon fiber, bulking agent and thermoplastic polymer are kneaded into composite sheet stock in two-roll mill and obtain sheet stock II, Its component proportioning is got the raw materials ready as described in claim 2；
4）Sheet stock I, sheet stock II are cut by die size, sheet stock II is placed between two sheet stock I, it is overlapped into " sheet stock I- Sheet stock II- sheet stocks I " sandwich structure, then puts it into pressing die, is placed in hot-forming in vulcanizing press, hot pressing temperature According to thermoplastic polymer Mold Temperatures set.
6. the preparation method of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate according to claim 5, its It is characterised by, the step 2）With step 3）The preceding roll temperature of middle mixing is 110-115 °C, and rear roll temperature is 100-110 °C；It is mixed The refining time is 10-15min.
7. the preparation method of chopped ramie fiber/carbon fiber/thermoplastic polymer composite material plate according to claim 5, its It is characterised by, the step 4）Hot pressing temperature is 140-170 °C, 10-15min.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113715238A (en) * 2021-08-04 2021-11-30 哈尔滨化兴航卫航天生物科技有限公司 Preparation method of biodegradable composite material
CN115302867A (en) * 2022-06-22 2022-11-08 吉林大学 Carbon fiber/fibrilia reinforced thermoplastic composite board and preparation method thereof

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Publication number Priority date Publication date Assignee Title
JPH04310725A (en) * 1991-04-10 1992-11-02 Teijin Ltd Manufacture of light composite molded material
CN1594409A (en) * 2004-06-23 2005-03-16 昆明大学 Natural plant fibre enhanced polyolefin plastic plate and method for preparing same
CN102785627A (en) * 2012-07-19 2012-11-21 马道平 Layer structure composite material bumper with panel composite function and production method thereof

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH04310725A (en) * 1991-04-10 1992-11-02 Teijin Ltd Manufacture of light composite molded material
CN1594409A (en) * 2004-06-23 2005-03-16 昆明大学 Natural plant fibre enhanced polyolefin plastic plate and method for preparing same
CN102785627A (en) * 2012-07-19 2012-11-21 马道平 Layer structure composite material bumper with panel composite function and production method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113715238A (en) * 2021-08-04 2021-11-30 哈尔滨化兴航卫航天生物科技有限公司 Preparation method of biodegradable composite material
CN115302867A (en) * 2022-06-22 2022-11-08 吉林大学 Carbon fiber/fibrilia reinforced thermoplastic composite board and preparation method thereof
CN115302867B (en) * 2022-06-22 2023-09-08 吉林大学 Carbon fiber/fibrilia reinforced thermoplastic composite board and preparation method thereof

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