CN105887235A - High-performance nano-crystalline cellulose/chitin composite fibers and preparing method thereof - Google Patents
High-performance nano-crystalline cellulose/chitin composite fibers and preparing method thereof Download PDFInfo
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- CN105887235A CN105887235A CN201610371041.0A CN201610371041A CN105887235A CN 105887235 A CN105887235 A CN 105887235A CN 201610371041 A CN201610371041 A CN 201610371041A CN 105887235 A CN105887235 A CN 105887235A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/18—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from other substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention provides a preparing method of high-performance nano-crystalline cellulose/chitin composite fibers. The preparing method comprises the following steps that purified cellulose is subjected to enzymolysis with a cellulase solution, centrifugal separation and ultrasonic homogenization, and then a nano-crystalline cellulose whisker suspension is obtained; mineral substances and protein of chitin powder are removed, then the chitin powder is subjected to catalytic hydrolysis in a hydrogen peroxide solution, centrifugal separation and ultrasonic grinding, and a nano-chitin whisker suspension is obtained; the nano-crystalline cellulose whisker suspension and the nano-chitin whisker suspension are mixed and subjected to vacuum filtration and defoaming, and a composite whisker suspension is obtained; the composite whisker suspension is put into an extrusion vessel, pressurized, heated, extruded and then put on a steel wire mesh, pressure is applied, drying is carried out, and the nano-crystalline cellulose/chitin composite fibers are obtained. The fibers prepared from the method are transparent, small in specific gravity and good in toughness and flexibility.
Description
Technical field
The invention belongs to textile material technical field, be specifically related to a kind of high performance nano-cellulose/chitin and be combined
Fiber and preparation method thereof.
Background technology
Along with the continuous progress of science and technology, more and more novel fibers arise at the historic moment.In modern material is applied,
High-index material in optical material has good using value.High index of refraction optical material can not affect material
Reduce the proportion of material in the case of material refraction performance, make material lightweight miniaturization.
Along with the development of nanotechnology, nanometer composite technology is that high index of refraction optical material provides new sending out
Exhibition direction.Material can show much unusual character after entering nanoscale, living resources is tied mutually with nanotechnology
Conjunction can develop the functional product of excellent performance, environmental protection, and can improve the comprehensive utilization ratio of living resources,
Improve its economic worth.
It is currently based on high index of refraction optical material prepared by nano composite material and mostly is film morphology.Chinese patent CN
Disclosed in 101186109A, the preparation of a kind of nano fibre reinforcement composite resin with high transmission rate, will be received by cellulose
Thin film prepared by rice fiber, nylon nano fiber, polycarbonate nano fiber, glass nano-fibre or carbon nano-fiber
Fully infiltrate and in polyvinyl alcohol, soybean protein isolate, acrylic resin, epoxy resin or Merlon, then
Drying obtains strong transparent nano fibrous composite.China document (" optical clear, the chitin of low heat expansion
Nanofiber/polyether sulfone laminated film ", Deng Qiaoyun etc., Science Reporter, the 32nd phase 4/5 in 2014,45-50
Page) disclosed in a kind of chitin nano fiber/polyether sulfone laminated film, be chitin Nanowire prepared by mechanical treatment
Dimension makes nano fibrous membrane, then impregnated in resin solution, and vacuum drying taking-up obtains nanofiber/polyethersulfone resin
Laminated film.From above-mentioned prior art, it is currently based on high index of refraction optical material prepared by nanofiber, needs more
Wanting transparent resin to be combined with each other by nanofiber formation optical material as binding agent, its main machinery strength is the most still
Intensity based on resin, nanofiber can play the effect strengthening strength, the optical property of itself in transparent resin
Can not embody completely with mechanical strength, and the material prepared mostly be film like, threadiness is the most rare.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of high performance nano-cellulose/chitin composite fiber and
Preparation method, selects nano-cellulose whisker and nano-chitosan whisker as raw material, utilizes after heating pressurization extrusion,
Dried through pressure, obtain the porosity fiber less than 0.1%.Composite fibre prepared by the method need not use crosslinking
Agent and polymeric matrix just have the feature of low-expansion coefficient, the high grade of transparency, intensity and heat stability, and preparation technology is green
Colour circle is protected.
For solving above-mentioned technical problem, the technical scheme is that
A kind of high performance nano-cellulose/chitin composite fiber, in described nano-cellulose/chitin composite fiber
Including nano-cellulose whisker and nano-chitosan whisker, described nano-cellulose/chitin composite fiber is heated
Add hot-extrudable after be prepared from after drying through pressure testing, the porosity in described nano-cellulose/chitin composite fiber is low
In 0.1%.
Preferred as technique scheme, nano-cellulose whisker in described nano-cellulose/chitin composite fiber
A diameter of 15-25nm and a diameter of 30-50nm of nano-chitosan whisker, nano-cellulose whisker and nano-chitosan
The mass ratio of whisker is 1:0.5-0.8.
The present invention also provides for the preparation method of a kind of high performance nano-cellulose/chitin composite fiber, including following
Step:
(1) by the cellulose of purification through the cellulase solution enzymolysis that mass fraction is 1-3%, it is heated to 80-100 DEG C
Terminating reaction, be performing centrifugal separation on the material removing particle diameter more than 1 μm, ultrasonic homogenizing obtains nano-cellulose whisker and suspends
Liquid；
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 1-3h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 6-10 times terminates anti-
Should, it is performing centrifugal separation on removing particle diameter more than the material of 1 μm, grinds and ultrasonic obtain nano-chitosan whisker suspension；
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms composite crystal must suspension；
(4) composite crystal step (3) prepared must be placed in extrusion container, to being combined in extrusion container by suspension
Whisker suspension carries out pressurized, heated, and extrusion is placed on steel wire, pressure be dried to obtain high performance nano-cellulose/
Chitin composite fiber.
Preferred as technique scheme, in described step (1), the temperature of enzymolysis is 45-55 DEG C, and pH value is
4.5-5, the time is 30-60min.
Preferred as technique scheme, in described step (1), nanofiber in nano-cellulose whisker suspension
The mass fraction of element whisker is 0.1-2%.
Preferred as technique scheme, in described step (2), nanometer carapace in nano-chitosan whisker suspension
The mass fraction of element whisker is 0.2-3%.
Preferred as technique scheme, in described step (3), composite crystal must the mass fraction of solid of suspension
For 1-10%.
Preferred as technique scheme, in described step (4), the temperature of extrusion is 60-65 DEG C, and pressure is
10-15mPa。
Preferred as technique scheme, in described step (4), the temperature that pressure is dried is 50-55 DEG C, pressure
For 20-25kPa.
Preferred as technique scheme, in described step (4), the time that pressure is dried is 3-4d.
Compared with prior art, the method have the advantages that
(1) nano-cellulose contained in high performance nano-cellulose/chitin composite fiber prepared by the present invention is brilliant
Must have the performances such as nano-grade size, intensity height, high-specific surface area, high length-diameter ratio with nano-chitosan whisker, pass through
Fiber carries out during water evaporates pressure heating, and capillarity makes nano-cellulose whisker mutually exclusive, and
The hydrogen bond formed between nano-cellulose whisker makes the form of fiber keep constant, therefore need not use cross-linking agent just may be used
Form the material of high intensity.
(2) present invention select nano-cellulose whisker and the size uniform nanoscale of nano-chitosan whisker, will both
Composite fibre in conjunction with the ultralow porosity of preparation has higher transparency, low-expansion coefficient, preferable intensity and heat
Stability, and both sources are all Renewable resource, environmental protection, the fiber light specific gravity of preparation, good toughness, soft
Softness is good.
(3) preparation method of the present invention is simple, and preparation technology environmental protection is free of a burden to environment, the compound fibre of preparation
Dimension can be used for the numerous areas such as textile garment, civilian, building.
Detailed description of the invention
The present invention is described in detail, in illustrative examples and the explanation of this present invention below in conjunction with specific embodiment
It is used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 1%, regulation pH value is 4.5,
Enzymolysis 30min at 45 DEG C, is heated to 80 DEG C and terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm,
Ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 0.1%, the wherein diameter of nano-cellulose whisker
For 25nm.
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 1h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 6 times terminates reaction, warp
Centrifugation removes particle diameter more than the material of 1 μm, grinds and ultrasonic obtains the nano-chitosan whisker that mass fraction is 0.2%
Suspension, wherein a diameter of 50nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 10% palpus suspension of solid, its
Middle nano-cellulose whisker is 1:0.8 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 60 DEG C
Temperature and 10-15mPa pressure under extrude and be placed on steel wire, at the temperature of 50 DEG C and the pressure and temperature of 20kPa
Under be dried 3d, obtain high performance nano-cellulose/chitin composite fiber.
Embodiment 2:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 3%, regulation pH value is 5,
Enzymolysis 60min at 55 DEG C, is heated to 100 DEG C and terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm,
Ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 2%, and wherein nano-cellulose whisker is a diameter of
15nm。
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 3h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 10 times terminates reaction, warp
Centrifugation removes particle diameter more than the material of 1 μm, grinds and ultrasonic obtain the nano-chitosan whisker that mass fraction is 3% and hang
Supernatant liquid, wherein a diameter of 30nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 1% palpus suspension of solid, wherein
Nano-cellulose whisker is 1:0.5 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 65 DEG C
Temperature and 15mPa pressure under extrude and be placed on steel wire, at the temperature of 55 DEG C and the pressure and temperature of 25kPa
It is dried 4d, obtains high performance nano-cellulose/chitin composite fiber.
Embodiment 3:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 2%, regulation pH value is 4.5,
Enzymolysis 40min at 50 DEG C, is heated to 90 DEG C and terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm,
Ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 0.5%, the wherein diameter of nano-cellulose whisker
For 20nm.
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 2h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 8 times terminates reaction, warp
Centrifugation removes particle diameter more than the material of 1 μm, grinds and ultrasonic obtain the nano-chitosan whisker that mass fraction is 1% and hang
Supernatant liquid, wherein a diameter of 40nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 5% palpus suspension of solid, wherein
Nano-cellulose whisker is 1:0.6 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 60 DEG C
Temperature and 10-15mPa pressure under extrude and be placed on steel wire, at the temperature of 50 DEG C and the pressure and temperature of 20kPa
Under be dried 3.5d, obtain high performance nano-cellulose/chitin composite fiber.
Embodiment 4:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 1.5%, regulation pH value is 5,
Enzymolysis 60min at 45 DEG C, is heated to 95 DEG C and terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm,
Ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 1%, and wherein nano-cellulose whisker is a diameter of
18nm。
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 2.5h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 10 times terminates reaction,
It is performing centrifugal separation on removing particle diameter more than the material of 1 μm, grinds that ultrasonic to obtain the nano-chitosan that mass fraction is 0.8% brilliant
Must suspension, wherein a diameter of 35nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 3% palpus suspension of solid, wherein
Nano-cellulose whisker is 1:0.7 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 65 DEG C
Temperature and 12mPa pressure under extrude and be placed on steel wire, at the temperature of 55 DEG C and the pressure and temperature of 20kPa
It is dried 4d, obtains high performance nano-cellulose/chitin composite fiber.
Embodiment 5:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 1%, regulation pH value is 5,
Enzymolysis 60min at 45 DEG C, is heated to 100 DEG C and terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm,
Ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 1.6%, the wherein diameter of nano-cellulose whisker
For 17nm.
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 2h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 10 times terminates reaction, warp
Centrifugation removes particle diameter more than the material of 1 μm, grinds and ultrasonic obtains the nano-chitosan whisker that mass fraction is 0.3%
Suspension, wherein a diameter of 35nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 2% palpus suspension of solid, wherein
Nano-cellulose whisker is 1:0.6 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 60 DEG C
Temperature and 15mPa pressure under extrude and be placed on steel wire, at the temperature of 55 DEG C and the pressure and temperature of 20kPa
It is dried 4d, obtains high performance nano-cellulose/chitin composite fiber.
Embodiment 6:
(1) being placed in by the cellulose of purification in the cellulase solution that mass fraction is 3%, regulation pH value is 4.5,
Enzymolysis 60min at 55 DEG C, is heated to 100 DEG C and terminates reaction, is performing centrifugal separation on the thing removing particle diameter more than 1 μm
Matter, ultrasonic homogenizing obtains the nano-cellulose whisker suspension that mass fraction is 0.4%, wherein nano-cellulose whisker
A diameter of 21nm.
(2) chitin powder is demineralized and after protein, adding mass fraction is the hydrogenperoxide steam generator of 30%
Middle catalyzing hydrolysis 3h, the deionized water of add the hydrogenperoxide steam generator volume that consumption is 30% 8 times terminates reaction, warp
Centrifugation removes particle diameter more than the material of 1 μm, grinds and ultrasonic obtains the nano-chitosan whisker that mass fraction is 0.8%
Suspension, wherein a diameter of 35nm of nano-chitosan whisker.
(3) nano-chitosan prepared by nano-cellulose whisker suspension step (1) prepared and step (2) is brilliant
Must be sufficiently mixed by suspension, vacuum filtration deaeration forms the composite crystal that mass fraction the is 6% palpus suspension of solid, wherein
Nano-cellulose whisker is 1:0.6 with the mass ratio of nano-chitosan whisker.
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, and composite crystal palpus suspension is at 60 DEG C
Temperature and 12mPa pressure under extrude and be placed on steel wire, at the temperature of 50 DEG C and the pressure and temperature of 20kPa
It is dried 4d, obtains high performance nano-cellulose/chitin composite fiber.
After testing, the porosity, straight of high performance nano-cellulose/chitin composite fiber prepared by embodiment 1-6
The result of footpath, transparency, intensity, elasticity and thermal coefficient of expansion is as follows:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Porosity (%) | 0.1 | 0.08 | 0.1 | 0.09 | 0.1 | 0.08 |
| Diameter (μm) | 25 | 31 | 26 | 29 | 28 | 30 |
| Transparency (%) | 65 | 6765 | 68 | 64 | 65 | 65 |
| Ultimate strength cN | 2.3 | 2.0 | 2.4 | 2.1 | 2.6 | 2.4 |
| Elastic modelling quantity (mPa) | 59 | 62 | 64 | 67 | 65 | 61 |
| Thermal coefficient of expansion (× 10-5K-1) | 8.7 | 9.0 | 8.6 | 8.4 | 8.1 | 8.5 |
As seen from the above table, the porosity of high performance nano-cellulose/chitin composite fiber prepared by the present invention is little,
Low-expansion coefficient, mechanical strength is preferable.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology
Become.Therefore, art has usually intellectual such as without departing from disclosed spirit and technology
All equivalences completed under thought are modified or change, and must be contained by the claim of the present invention.
Claims (10)
1. high performance nano-cellulose/chitin composite fiber, it is characterised in that receive described in:
Rice cellulose/chitin composite fibre includes nano-cellulose whisker and nano-chitosan whisker, institute
State nano-cellulose/chitin composite fiber be heated add hot-extrudable after prepare after drying through pressure testing and
Becoming, the porosity in described nano-cellulose/chitin composite fiber is less than 0.1%.
The compound fibre of the high performance nano-cellulose/chitin of one the most according to claim 1
Dimension, it is characterised in that nano-cellulose whisker in described nano-cellulose/chitin composite fiber
A diameter of 15-25nm and a diameter of 30-50nm of nano-chitosan whisker, nano-cellulose whisker with receive
The mass ratio of rice chitin whisker is 1:0.5-0.8.
3. a preparation method for high performance nano-cellulose/chitin composite fiber, its feature exists
In, comprise the following steps:
(1) by the cellulose of purification through the cellulase solution enzymolysis that mass fraction is 1-3%, heating
Terminating reaction to 80-100 DEG C, be performing centrifugal separation on the material removing particle diameter more than 1 μm, ultrasonic homogenizing obtains
To nano-cellulose whisker suspension；
(2) chitin powder is demineralized and after protein, adding mass fraction is the mistake of 30%
Catalyzing hydrolysis 1-3h in hydrogen peroxide solution, adds the 6-10 of the hydrogenperoxide steam generator volume that consumption is 30%
Deionized water again terminates reaction, is performing centrifugal separation on the material removing particle diameter more than 1 μm, grinds ultrasonic
Obtain nano-chitosan whisker suspension；
(3) prepared by nano-cellulose whisker suspension step (1) prepared and step (2) receives
Rice chitin whisker suspension is sufficiently mixed, and vacuum filtration deaeration forms composite crystal must suspension；
(4) composite crystal step (3) prepared must be placed in extrusion container by suspension, holds extrusion
Composite crystal in device must carry out pressurized, heated by suspension, and extrusion is placed on steel wire, and pressure is dried to obtain
High performance nano-cellulose/chitin composite fiber.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (1), the temperature of enzymolysis is 45-55 DEG C, pH
Value is 4.5-5, and the time is 30-60min.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (1), nano-cellulose whisker suspension is received
The mass fraction of rice cellulose whiskers is 0.1-2%.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (2), nano-chitosan whisker suspension is received
The mass fraction of rice chitin whisker is 0.2-3%.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (3), composite crystal must the matter of solid of suspension
Amount mark is 1-10%.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (4), the temperature of extrusion is 60-65 DEG C, pressure
Power is 10-15mPa.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (4), pressure be dried temperature be 50-55 DEG C,
Pressure is 20-25kPa.
High performance nano-cellulose/the chitin composite fiber of one the most according to claim 3
Preparation method, it is characterised in that: in described step (4), pressure be dried time be 3-4d.
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| Publication number | Publication date |
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| CN108441983B (en) | 2021-03-26 |
| CN105887235B (en) | 2018-05-04 |
| CN108441983A (en) | 2018-08-24 |
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