CN109457306A - A kind of preparation method of bidirectional shape memory fiber - Google Patents
A kind of preparation method of bidirectional shape memory fiber Download PDFInfo
- Publication number
- CN109457306A CN109457306A CN201811253507.2A CN201811253507A CN109457306A CN 109457306 A CN109457306 A CN 109457306A CN 201811253507 A CN201811253507 A CN 201811253507A CN 109457306 A CN109457306 A CN 109457306A
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- shape memory
- ultraviolet lamp
- bidirectional shape
- preparation
- eva
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D11/00—Other features of manufacture
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
Abstract
The present invention discloses a kind of preparation method of bidirectional shape memory fiber.The preparation process of the bidirectional shape memory fiber includes following 2 steps: (1) by benzophenone, triallyl isocyanurate and polyethylene vinyl acetate resin melting blending extrusion；(2) melt extrusion is by secondary drawing-off, and the bidirectional shape memory fiber solidified with synchronous ultraviolet light.The ultra-violet curing time of the present invention is short, expense is low and preparation process is simple.The reversible transition temperature of bidirectional shape memory fiber is at 85~100 DEG C, and reversible strain is in 5~15%, and reversible shape response rate is maintained at 95% or more.
Description
Technical field
The present invention relates to a kind of bidirectional shape memory fiber and preparation method thereof more particularly to bidirectional shape memory fibers
Melt spinning process synchronizes the method with ultra-violet curing, and is related to preparing the group distribution that such bidirectional shape memory fiber needs
Side, ultra-violet curing parameter and spinning technology parameter, belong to technical field of polymer materials.
Background technique
Shape-memory polymer is can be in certain external force and outside stimulus (such as temperature, light, electricity, magnetic and solvent etc.)
Temporary shapes are assigned, receives stimulation again and restores to the intelligent flexible material of original shape.Shape memory polymer material exists
Industrial application concentrates on heat shrinkage film, wire and cable, the heat-shrink tube of auto industry and the aerospace of packaging material at present
The fields such as field.
External force figuration again whether is needed according to the conversion in memory cycle between temporary shapes and original shape, it can be with
Shape-memory polymer is divided into one-way shape memory polymer and bidirectional shape memory polymer.Bidirectional shape memory polymer
, only by the variation of temperature, it can realize the active conversion of temporary shapes and original shape after primary stress figuration, show
The invertibity of change in shape.Such characteristic, the application for being beneficial to shape-memory polymer become more extensively.
Polyethylene vinyl acetate copolymer (Poly (ethylene-co-vinyl acetate), EVA) is as a kind of
Commercial semicrystalline copolymer, has a wide range of applications in fields such as wire and cable, foamed material and solar battery films.
Since Xie seminar discovery crosslinked EVA hypocrystalline network can show bidirectional shape memory effect under stress, crosslinking
The bidirectional shape memory behavior of EVA has obtained profound research.The different heat deflections of the in-depth studies such as this seminar Qian
Influence of the temperature to its Shape memory behavior under unstressed, propose high temperature under figuration and compared with low-heat recovery temperature can make its
Bidirectional shape memory is shown under unstressed, this undoubtedly expands its application.But current bidirectional shape memory polymer is mostly with thin
Based on membrane material, this is limited its application to a certain extent.
Summary of the invention
In order to widen bidirectional shape memory EVA in the application in the fields such as weaving dress ornament, artificial-muscle and flexible sensor.This
The purpose of invention is to provide a kind of preparation method of bidirectional shape memory fiber, mainly includes component formula and preparation process ginseng
Number, operating process is easy, low in cost, and it is higher using added value can to assign general-purpose plastics EVA.
In order to achieve the above object, technical solution of the invention is as follows:
A kind of preparation method of bidirectional shape memory fiber, it the following steps are included:
(1) benzophenone, triallyl isocyanurate, EVA resin are squeezed out using double screw extruder, three's mass ratio
For (3~5): (3~5): 100.Extruder Heating Zone Temperature is set as 145,145,150,150 DEG C, and screw host revolving speed is 40
~50rpm, charging bar revolving speed are 30~40rpm, 1~2m/min of extruded velocity；
(2) melt extrusion is passed through into the roller drawing-off installed in ultraviolet lamp box, linear velocity about 8-10m/min first；It will
The melt of drawing-off passes through the secondary drawing-off of roller outside ultraviolet lamp box, linear velocity about 10-20m/min；
Further, the VA content of EVA resin is 18%.
Further, 250W~2KW ultraviolet lamp, 30~50cm of fluorescent tube length are installed in ultraviolet lamp box.
The beneficial effects of the present invention are: the present invention is in the synchronous ultraviolet light cross-linking technology of EVA melt spinning process, hexichol first
The ultraviolet light that ketone absorbs specific wavelength becomes excitation state from ground state and releases free radical, and free radical, which can be flutterred, catches EVA strand
In active H atom, the chain reaction that free radical causes makes linear EVA strand become cross-linked network structure.Isocyanide urea
Sour triallyl improves the effect of crosslinking as assistant crosslinking agent and shortens cross-linking reaction time.The crosslinking of ultraviolet light synchrotron radiation is anti-
Answer that process time is short, expense is low and preparation process is easy.The bidirectional shape memory EVA stability of fiber being prepared is good, and
Fiber shows good Shape Memory Effect and shape recovery process because of its suitable crosslink density and crystallinity.It is fine
The reversible transition temperature of dimension is at 85~100 DEG C, and adjusting temperature and stress makes reversible strain between 5~15%, and reversible shape
Response rate is maintained at 95% or more.
Detailed description of the invention
Fig. 1 is bidirectional shape memory EVA fiber pictorial diagram and petrographic microscope figure prepared by embodiment 1.
Fig. 2 is bidirectional shape memory EVA fiber prepared by embodiment 1, when transition temperature is 85 DEG C, (a) 0.1MPa,
(b) the bidirectional shape memory effect figure under 0.2MPa, (c) 0.3MPa stress different with (d) 0.4MPa.
Fig. 3 is bidirectional shape memory EVA fiber prepared by embodiment 1, and under 0.3MPa stress, transition temperature is respectively
(a) 85 DEG C and bidirectional shape memory effect figure when 100 DEG C of (b).
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1:
(1) after the quality of benzophenone, triallyl isocyanurate and EVA resin being mixed respectively with 3g, 3g and 100g
It is squeezed out using double screw extruder.Extruder Heating Zone Temperature is set as 145,145,150,150 DEG C, and screw host revolving speed is
40rpm, charging bar revolving speed are 30rpm, extruded velocity 1m/min；
(2) by melt extrusion first by the roller drawing-off installed in ultraviolet lamp box, linear velocity about 8m/min will be primary
The melt of drawing-off is by the secondary drawing-off of roller outside ultraviolet lamp box, and linear velocity about 10m/min, draw ratio is about 10；
(3) this ultraviolet lamp box installation ultraviolet lamp power is 250W, and fluorescent tube length is 30cm.
Shown in the EVA fiber pictorial diagram such as Fig. 1 (a) being prepared, it can be seen from the figure that the invention can be with continuous spinning
And fibre diameter is uniform, Fig. 1 (b) is petrographic microscope figure, and as can be seen from the figure fibre diameter is 203mm；Fig. 1 (c)~(d)
To be now fabric suspension weight figure, show that the intensity of single fiber is high and elasticity is good.
Fig. 2 is above-mentioned EVA fiber, when, the bidirectional shape memory effect figure under different stress.(a)0.1MPa,(b)
EVA fiber when 0.2MPa, (c) 0.3MPa and (d) 0.4MPa.It is 85 DEG C that fiber can be gone out from figure in transition temperature, stress
For maximum reversible strain can be obtained under 0.1MPa.Cyclic curve shows that its bidirectional shape memory behavior has excellent stabilization
Property.
Fig. 3 is bidirectional shape memory EVA fiber when stress is 0.3MPa, when transition temperature is respectively 85 DEG C and 100 DEG C
2W-SME cyclic curve figure.It can be seen from the figure that its under big stress condition (0.3MPa) can be made by improving transition temperature
Show biggish Shape Memory Effect.This provides one kind and adjusts reversible answer by adjusting the conditions such as temperature and stress
The method of change.Cyclic curve again shows that bidirectional shape memory behavior has excellent stability under its condition of different temperatures.
Under different transition temperatures and stress, reversible strain and reversible shape response rate summarize such as 1 institute of table above-mentioned EVA fiber
Show.It can be seen that adjust the conditions such as temperature and stress can make the reversible strain of bidirectional shape memory EVA fiber 5-15% it
Between change, and condition changes its reversible shape response rate and is above 95%.
Table 1
Embodiment 2:
(1) after the quality of benzophenone, triallyl isocyanurate and EVA resin being mixed respectively with 4g, 4g and 100g
It is squeezed out using double screw extruder.Extruder Heating Zone Temperature is set as 145,145,150,150 DEG C, and screw host revolving speed is
45rpm, charging bar revolving speed are 35rpm, extruded velocity 1.5m/min；
(2) by melt extrusion first by the roller drawing-off installed in ultraviolet lamp box, linear velocity about 9m/min will be primary
The melt of drawing-off is by the secondary drawing-off of roller outside ultraviolet lamp box, and linear velocity about 15m/min, draw ratio is about 10；
(3) this ultraviolet lamp box installation ultraviolet lamp power is 1KW, and fluorescent tube length is 40cm.
The EVA fiber that the present embodiment obtains is characterized according to such as identical means of embodiment 1, the results showed that fiber
Two-way shape memory effect is close with the two-way shape memory effect that the fiber that embodiment 1 obtains is shown.
Embodiment 3:
(1) after the quality of benzophenone, triallyl isocyanurate and EVA resin being mixed respectively with 5g, 5g and 100g
It is squeezed out using double screw extruder.Extruder Heating Zone Temperature is set as 145,145,150,150 DEG C, and screw host revolving speed is
50rpm, charging bar revolving speed are 40rpm, extruded velocity 2m/min；
(2) melt extrusion is passed through into the roller drawing-off installed in ultraviolet lamp box, linear velocity about 10m/min, by one first
The melt of secondary drawing-off is by the secondary drawing-off of roller outside ultraviolet lamp box, and linear velocity about 20m/min, draw ratio is about 10；
(3) this ultraviolet lamp box installation ultraviolet lamp power is 2KW, and fluorescent tube length is 50cm.
The EVA fiber that the present embodiment obtains is characterized according to such as identical means of embodiment 1, the results showed that fiber
Two-way shape memory effect is close with the two-way shape memory effect that the fiber that embodiment 1 obtains is shown.
By three above embodiment it is found that according to the EVA fiber that scheme of the present invention obtains, bidirectional shape memory fiber
Reversible transition temperature at 85~100 DEG C, reversible strain is in 5~15%, and reversible shape response rate is maintained at 95% or more.
Comparative example 1
(1) (1) mixes the quality of benzophenone, triallyl isocyanurate and EVA resin respectively with 2g, 2g and 100g
It is squeezed out afterwards using double screw extruder.Extruder Heating Zone Temperature is set as 145,145,150,150 DEG C, and screw host revolving speed is
50rpm, charging bar revolving speed are 40rpm, extruded velocity 2m/min；
(2) melt extrusion is passed through into the roller drawing-off installed in ultraviolet lamp box, linear velocity about 10m/min, by one first
The melt of secondary drawing-off is by the secondary drawing-off of roller outside ultraviolet lamp box, and linear velocity about 20m/min, draw ratio is about 10；
(3) this ultraviolet lamp box installation ultraviolet lamp power is 2KW, and fluorescent tube length is 50cm.
The EVA fiber that the present embodiment obtains is characterized according to such as identical means of embodiment 1, the results showed that without obvious
Shape Memory Effect, the bidirectional shape memory effect of EVA fiber 5-15% obtained far below Examples 1 to 3 and
95% or more reversible shape response rate.Show the benzophenone initiator and triallyl isocyanurate assistant crosslinking agent of low content,
Bidirectional shape memory EVA fiber of good performance can not be obtained.
Claims (3)
1. a kind of preparation method of bidirectional shape memory fiber, it the following steps are included:
(1) benzophenone, triallyl isocyanurate and polyethylene vinyl acetate (EVA) resin are used into double screw extruder
It squeezes out, three's mass ratio is (3~5): (3~5): 100.Heating Zone Temperature is set as 145,145,150,150 DEG C, screw host
Revolving speed is 40~50rpm, and charging bar revolving speed is 30~40rpm, 1~2m/min of rate of extrusion；
(2) first using the roller drawing-off installed in ultraviolet lamp box, linear velocity about 8-20m/min will once be led melt extrusion
The melt stretched uses the secondary drawing-off of roller outside ultraviolet lamp box, linear velocity about 10-20m/min.
2. preparation method according to claim 1, which is characterized in that the EVA resin that step (1) uses, VA content are
18wt%.
3. preparation method according to claim 1, which is characterized in that 250W~2KW ultraviolet lamp is installed in ultraviolet lamp box,
30~50cm of fluorescent tube length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811253507.2A CN109457306B (en) | 2018-10-25 | 2018-10-25 | Preparation method of bidirectional shape memory fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253507.2A CN109457306B (en) | 2018-10-25 | 2018-10-25 | Preparation method of bidirectional shape memory fiber |
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| CN109457306A true CN109457306A (en) | 2019-03-12 |
| CN109457306B CN109457306B (en) | 2021-03-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110003395A (en) * | 2019-04-23 | 2019-07-12 | 深圳大学 | Shape-memory material and its preparation method and application |
| CN112376266A (en) * | 2020-09-24 | 2021-02-19 | 浙江理工大学 | Composite fiber with shape memory performance and strain sensing performance and preparation method thereof |
| CN112986317A (en) * | 2021-03-31 | 2021-06-18 | 浙江理工大学 | Testing device for thermally driving artificial muscle fibers and application method thereof |
| CN113073394A (en) * | 2021-03-29 | 2021-07-06 | 浙江理工大学 | Thermal driving type twisted artificial muscle composite fiber and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110003395A (en) * | 2019-04-23 | 2019-07-12 | 深圳大学 | Shape-memory material and its preparation method and application |
| CN112376266A (en) * | 2020-09-24 | 2021-02-19 | 浙江理工大学 | Composite fiber with shape memory performance and strain sensing performance and preparation method thereof |
| CN112376266B (en) * | 2020-09-24 | 2023-04-28 | 浙江理工大学 | Composite fiber with shape memory performance and strain sensing performance and preparation method thereof |
| CN113073394A (en) * | 2021-03-29 | 2021-07-06 | 浙江理工大学 | Thermal driving type twisted artificial muscle composite fiber and preparation method thereof |
| CN113073394B (en) * | 2021-03-29 | 2022-03-18 | 浙江理工大学 | Thermal driving type twisted artificial muscle composite fiber and preparation method thereof |
| CN112986317A (en) * | 2021-03-31 | 2021-06-18 | 浙江理工大学 | Testing device for thermally driving artificial muscle fibers and application method thereof |
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| CN109457306B (en) | 2021-03-30 |
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Application publication date: 20190312 Assignee: Zhejiang Boshang Textile Co.,Ltd. Assignor: ZHEJIANG SCI-TECH University Contract record no.: X2022330000457 Denomination of invention: A kind of preparation method of bidirectional shape memory fiber Granted publication date: 20210330 License type: Common License Record date: 20220825 Application publication date: 20190312 Assignee: Wenzhou Mingkang Electronic Technology Co.,Ltd. Assignor: ZHEJIANG SCI-TECH University Contract record no.: X2022330000460 Denomination of invention: A kind of preparation method of bidirectional shape memory fiber Granted publication date: 20210330 License type: Common License Record date: 20220825 |
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