CN105482481B

CN105482481B - A kind of bamboo fiber-based biomass composite and preparation method thereof

Info

Publication number: CN105482481B
Application number: CN201510919529.8A
Authority: CN
Inventors: 曾广胜
Original assignee: Hunan University of Technology
Current assignee: Hunan Lingyue New Material Co.,Ltd.
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2018-09-07
Anticipated expiration: 2035-12-14
Also published as: CN105482481A

Abstract

The invention discloses a kind of bamboo fiber-based biomass composites and preparation method thereof.Make full use of bamboo growth cycle short, bamboo fibre has many advantages, such as high intensity, pest control and anticorrosion, antiultraviolet, by process such as chemical immersion and autoclavings, then with polypropylene（PP）Mixing, coordinate other additives, using suitable processing step and parameter, it is granulated to obtain a kind of high-performance with Screw Extrusion, low-cost biomass composite, the various products of the methods of injection molding, extrusion, molding, machining molding can be used in the material, it is widely used in the fields such as packaging, electronics, communication, furniture, decoration, automobile, aircraft, military project, instead of materials such as plastics and logs, there is good social and economic benefit.

Description

A kind of bamboo fiber-based biomass composite and preparation method thereof

Technical field

The present invention relates to a kind of bamboo fiber-based biomass composite and preparation method thereof, belongs to new material and its molding adds Work field, invention product can be used for replacing plastics, timber etc..

Background technology

The material used in the fields such as packaging, electronic apparatus, household house ornamentation, automobile, aircraft, military project is mainly with stone at present Based on oil base plastics, log is partly used.But have can not be biodegradable for plastics, the shortcomings of polluting environment, meanwhile, oil Resource is limited, does not have sustainable developability.And the use of a large amount of logs, it will cut down a large amount of forest, destroy ecological environment. Therefore, waste and old plant fiber is combined with part high molecule plastic, produces a kind of wood plastic composite of superior performance, Timber and plastics can be replaced, shortage of resources, ecological disruption and problem of environmental pollution are extenuated.But due to plant fiber and modeling Associativity between material is poor, and the processing and forming of wood-plastic products is difficult, has intensity so as to cause the wood-plastic products on existing market It is low, property is crisp, than the defects such as great, plant fiber content is low.The present invention is led to using the short bamboo fibre of growth cycle as main raw material(s) Special autoclaving technique is crossed, combined formulation design is produced a kind of with high intensity, the biomass of good toughness, low cost Composite material can replace plastics and timber etc..

Invention content

It is an object of the invention to overcome existing wood plastic composite to have, intensity is low, property is crisp, than great, plant fiber content The shortcomings of low, of high cost, makes full use of bamboo growth cycle short, and bamboo fibre has high intensity, pest control and anticorrosion, antiultraviolet etc. excellent Point, by process such as chemical immersion and autoclavings, then with polypropylene（PP）Mixing coordinates other additives, uses Suitable processing step and parameter are granulated to obtain a kind of high-performance, low-cost biomass composite with Screw Extrusion, should The various products of the methods of injection molding, extrusion, molding, machining molding can be used in material, are widely used in packaging, electronics, communication, family The fields such as tool, decoration, automobile, aircraft, military project have good social and economic benefit instead of materials such as plastics and logs.

The composite material of the present invention, main group becomes：Bamboo fibre, polypropylene, calcium oxide, lauryl sodium sulfate are stearic Sour calcium, polyethylene wax, DCP（Cumyl peroxide）, titanium dioxide, water, sodium citrate.

Each component ratio and preparation process：

（1）Take 100 parts（Mass fraction）Moisture content is 7 ~ 15%（It is preferred that 10%）Bamboo fibre（Buy processed papermaking in market Use bamboo macrofiber）, 10 ~ 20 parts of calcium oxide（It is preferred that 15 parts）, 300 ~ 500 parts of water（It is preferred that 400 parts）, it is blended in a kettle uniform Afterwards, sealing and standing 24 ~ 72 hours（It is preferred that 36 hours）, then take out and filter moisture（It is gently held with hand, is preferred without obviously dripping）, wait for With

（2）Take 5 ~ 10 parts of sodium citrate（It is preferred that 8 parts）, 100 ~ 150 parts of water（It is preferred that 120 parts）, with（1）In treated bamboo Fiber blend is uniform, stands 3 ~ 8 hours（It is preferred that 5 hours）, it is then placed in autoclaving kettle, in 10 ~ 20MPa（It is preferred that 15MPa）, 100 ~ 130 DEG C（It is preferred that 120 DEG C）Under, boiling 30 ~ 60 minutes（It is preferred that 45 minutes）, then take out at 70 ~ 90 DEG C（It is excellent Select 80 DEG C）It is dry, make its moisture control 6 ~ 10%（It is preferred that 8%）, for use

（3）Take step（2）In 60 ~ 80 parts of fiber handling well（It is preferred that 70 parts）, 20 ~ 40 parts of polypropylene（It is preferred that 30 parts）, 1 ~ 3 part of lauryl sodium sulfate（It is preferred that 2 parts）, 1 ~ 3 part of calcium stearate（It is preferred that 2 parts）, 3 ~ 5 parts of polyethylene wax（It is preferred that 4 parts）, DCP（Cumyl peroxide）1 ~ 3 part（It is preferred that 2 parts）, 800 ~ 1200 mesh（It is preferred that 1000 mesh）3 ~ 8 parts of titanium dioxide（It is preferred that 5 Part）, it is blended 10 ~ 30 minutes in high mixer（It is preferred that 20 minutes）, for use.

（4）The material that will be mixed, by screw extruder extruding pelletization, control head temperature is 170 ~ 210 DEG C（It is preferred that 190℃）, 2 ~ 5MPa of head pressure（It is preferred that 3MPa）, 70 ~ 90r/min of screw speed（It is preferred that 80 r/min）.

The present invention is incompatible with plastics for plant fiber, the low feature of bond strength, impregnated using calcium oxide aqueous solution, It is washed with sodium citrate, then high temperature and pressure boiling is modified it, increases bamboo fibre and polyacrylic bond strength, so It is designed afterwards by being formulated, the effect of each additive is given full play to, finally in the way of Screw Extrusion, in suitable pressure, temperature Under speed, efficient, continuous extruding pelletization obtains a kind of high performance biomass composite, which can be by squeezing The modes such as go out, be molded, being molded, machining and being molded various products, be widely used in packaging, electronic apparatus, furniture decoration, building, The fields such as the vehicles and military project have very high Social benefit and economic benefit instead of plastics or timber.

Specific implementation mode

The invention will be further described with reference to embodiments.

Embodiment 1：

（1）Take 100 parts（Mass fraction）Moisture content is 10% bamboo fibre（It is fine that processed paper grade (stock) bamboo length is bought in market Dimension）, 10 parts of calcium oxide, 300 parts of water, after being blended uniformly in a kettle, sealing and standing 24 hours then takes out and filters moisture （It is gently held with hand, is preferred without obviously dripping）, for use

（2）Take 5 parts of sodium citrate（Outstanding 8 parts）, 100 parts of water, with（1）In treated bamboo fibre be blended uniform, stand 3 Hour, it is then placed in autoclaving kettle, at 10MPa, 100 ~ 130 DEG C, boiling 30 minutes then takes out in 70 DEG C of dryings, Make its moisture control 6%, for use

（3）Take step（2）In 60 parts of fiber handling well, 40 parts of polypropylene, 1 part of lauryl sodium sulfate, calcium stearate 1 Part, 3 parts of polyethylene wax, DCP（Cumyl peroxide）1 part, 1,000 3 parts of mesh titanium dioxide are blended 10 minutes in high mixer, For use.

（4）The material that will be mixed, by screw extruder extruding pelletization, control head temperature is 190 DEG C, head pressure 3MPa, 80 r/min of screw speed.

Table 1

Embodiment 2：

（1）Take 100 parts（Mass fraction）Moisture content is 10% bamboo fibre（It is fine that processed paper grade (stock) bamboo length is bought in market Dimension）, 15 parts of calcium oxide, 400 parts of water, after being blended uniformly in a kettle, sealing and standing 36 hours then takes out and filters moisture （It is gently held with hand, is preferred without obviously dripping）, for use

（2）Take 8 parts of sodium citrate, 120 parts of water, with（1）In treated bamboo fibre be blended uniform, stand 5 hours, then It is put into autoclaving kettle, at 15MPa, 120 DEG C, boiling 45 minutes then takes out in 80 DEG C of dryings, makes its moisture control 8%, for use

（3）Take step（2）In 70 parts of fiber handling well, 30 parts of polypropylene, 2 parts of lauryl sodium sulfate, calcium stearate 2 Part, 4 parts of polyethylene wax, DCP（Cumyl peroxide）2 parts, 1,000 5 parts of mesh titanium dioxide are blended 20 minutes in high mixer, For use.

Table 2

	Tensile strength MPa	Bending strength MPa	Tensile elongation %	Impact strength kJ/M²
					Embodiment 2	31	29	50	32

Embodiment 3：

（1）Take 100 parts（Mass fraction）Moisture content is 15% bamboo fibre（It is fine that processed paper grade (stock) bamboo length is bought in market Dimension）, 20 parts of calcium oxide, 500 parts of water, after being blended uniformly in a kettle, sealing and standing 72 hours then takes out and filters moisture （It is gently held with hand, is preferred without obviously dripping）, for use

（2）Take 10 parts of sodium citrate, 150 parts of water, with（1）In treated bamboo fibre be blended uniform, stand 8 hours, so After be put into autoclaving kettle, at 20MPa, 130 DEG C, boiling 60 minutes then takes out in 90 DEG C of dryings, makes its moisture content control System is 10%, for use

（3）Take step（2）In 80 parts of fiber handling well, 20 parts of polypropylene, 3 parts of lauryl sodium sulfate, calcium stearate 3 Part, 5 parts of polyethylene wax, DCP（Cumyl peroxide）3 parts, 1,000 8 parts of mesh titanium dioxide are blended 30 minutes in high mixer, For use.

（4）The material that will be mixed controls 190 DEG C of head temperature, head pressure by screw extruder extruding pelletization 3MPa, 80 r/min of screw speed.

Table 3

	Tensile strength MPa	Bending strength MPa	Tensile elongation %	Impact strength kJ/M²
					Embodiment 3	25	22	45	19

Claims

1. a kind of bamboo fiber-based biomass composite, which is characterized in that the composite material, by bamboo fibre, polypropylene, oxidation Calcium, lauryl sodium sulfate, calcium stearate, polyethylene wax, DCP (cumyl peroxide), titanium dioxide, water and sodium citrate It constitutes；

The composite material includes following preparation process：

(1) take 100 parts of moisture content for 7~15% bamboo fibres, 10~20 parts of calcium oxide, 300~500 parts of water, in a kettle altogether Be mixed it is even after, sealing and standing 24~72 hours after taking-up, is gently held with hand and filters moisture until without obviously dripping, for use；

(2) 5~10 parts of sodium citrate is taken, 100~150 parts of water, bamboo fibre is blended uniformly with treated in (1), stands 3~8 Hour, it is then placed in autoclaving kettle, at 10~20MPa, 100~130 DEG C, boiling 30~60 minutes then takes out 70~90 DEG C of dryings, make its moisture control 6~10%, for use；

(3) 60~80 parts of the fiber handled well in step (2) is taken, 20~40 parts of polypropylene, 1~3 part of lauryl sodium sulfate, firmly 1~3 part of resin acid calcium, 3~5 parts of polyethylene wax, 1~3 part of DCP (cumyl peroxide), 800~1200 mesh titanium dioxide 3~8 Part, it is blended 10~30 minutes in high mixer, for use；

(4) material that will be mixed, by screw extruder extruding pelletization, control head temperature is 170~210 DEG C, head pressure 2~5MPa of power, 70~90r/min of screw speed；

Wherein, the bamboo fibre is that processed paper grade (stock) bamboo macrofiber is bought in market.