CN110294836A - One kind can selfreparing shape-memory material and preparation method thereof and recovery method - Google Patents
One kind can selfreparing shape-memory material and preparation method thereof and recovery method Download PDFInfo
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- CN110294836A CN110294836A CN201910551255.XA CN201910551255A CN110294836A CN 110294836 A CN110294836 A CN 110294836A CN 201910551255 A CN201910551255 A CN 201910551255A CN 110294836 A CN110294836 A CN 110294836A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3215—Polyhydroxy compounds containing aromatic groups or benzoquinone groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2280/00—Compositions for creating shape memory
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The present invention provides one kind can selfreparing shape-memory material and preparation method thereof and recovery method, it is described can selfreparing shape-memory material include phenyl carbamates key；Wherein, the preparation method includes: step S1: taking molar ratio is the ternary isocyanates and dihydric phenols of 2:3, is uniformly mixed, and be added in mixer after catalyst is added, reacts 3~6 hours at 60 DEG C~100 DEG C, obtain polyurethane powder one；Step S2: the hot pressing 20~carry out hot pressing after forty minutes in the case where pressure is 3~5MPa, temperature is 110~140 DEG C by the polyurethane powder one, obtain it is described can selfreparing shape-memory material.The preparation of prepared through the invention and recycling can selfreparing shape-memory material all have preferable self-healing properties, can heal again after fracture, can repeatedly reprocess utilization, it is economic and environment-friendly.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to one kind can selfreparing shape-memory material, it is a kind of
Can selfreparing shape-memory material preparation method, and it is a kind of can selfreparing shape-memory material recovery method.
Background technique
Intelligent macromolecule material using more and more extensive, it is required also higher and higher.Material is often needed when in use
Material has more excellent performance, and dynamic covalent cross-linking polymer has a variety of excellent performances, before having a wide range of applications
Scape.The research of dynamic covalent cross-linking polymer has a long history, and the work of early stage is conceived to how to solve stress relaxation
The problem of bring polymer material mechanical property reduces.Since the 1990s, using dynamic covalent bond come active designs
The special adaptive of polymer network is increasingly becoming research mainstream, including dynamic urea bond, dynamic DA addition, dynamic borate
Key and dynamic disulfide bond etc..Researcher is further discovered that conventional thermosetting polyurethane can realize modeling by ammonia ester bond exchange
Change.Polyurethane is with a wide range of applications in numerous areas such as space flight and aviation, electronics, buildings.
People have carried out to unremitting effort many research ammonia to achieve the purpose that self-healing in terms of the synthesis of polyurethane
The work of ester bond exchange.Comparatively ideal plasticity not only may be implemented, it under certain condition even can be in not catalyst
Under the conditions of carry out.It can be said that this point is enough to change people to the understanding of conventional thermosetting polyurethane.Urethane bond is structure
The common structural motif of polymer network is built, there is very strong versatility.Xie Tao seminar has found that urethane bond has one
Fixed dynamic, this kind of materials show goes out good shape memory function, but does not have recyclability and self-healing properties.
Summary of the invention
The present invention provide one kind can selfreparing shape-memory material and preparation method thereof and recovery method, it is prepared and again
Recycling preparation can selfreparing shape-memory material all have preferable self-healing properties, can heal again after fracture, can
Repeatedly reprocessing utilizes, economic and environment-friendly.
To solve the above-mentioned problems, the invention discloses one kind can selfreparing shape-memory material, it is described to review one's lessons by oneself complex
Shape memory material includes phenyl carbamates key, the dynamic exchange process of the phenyl carbamates key are as follows:
Based on the same inventive concept, to solve the above-mentioned problems, the invention also discloses can selfreparing shape for described in
The preparation method of memory material, which comprises
Step S1: taking molar ratio is the ternary isocyanates and dihydric phenols of 2:3, is uniformly mixed after catalyst is added,
And be added in mixer, it is reacted 3~6 hours at 60 DEG C~100 DEG C, obtains polyurethane powder one；
Step S2: by the polyurethane powder one in the case where pressure is 3~5 MPa, temperature is 110~140 DEG C hot pressing 20~
Carry out hot pressing after forty minutes, obtain it is described can selfreparing shape-memory material.
Optionally, the ternary isocyanates is hexamethylene diisocyanate trimer, 4,4`, 4``- triphenylmenthane
Triisocyanate or L-lysine triisocyanate are any one or more of.
Optionally, the dihydric phenols are that bisphenol-A, bisphenol S, Bisphenol F or bisphenol b P-AP are any one or more of.
Optionally, the catalyst is dibutyl tin dilaurate, stannous octoate, triethylenediamine, pyridine, N- ethyl
Morpholine, diethylenetriamines, dimethylethanolamine, methyl diethanolamine, triethylamine, triethanolamine, N, N- lutidines
One or more of.
Optionally, the additive amount of the catalyst is 0.1wt%~0.5wt%.
Optionally, the step S2 are as follows:
By the polyurethane powder one, in the case where pressure is 4 MPa, temperature is 120 DEG C, hot pressing 20~after forty minutes carries out heat
Pressure, obtain it is described can selfreparing shape-memory material.
Optionally, by described in prepared by step S2 can selfreparing shape-memory material be dumbbell shape.
Based on the same inventive concept, to solve the above-mentioned problems, the invention also discloses can selfreparing shape for described in
The recovery method of memory material, which comprises
Step S3: to it is described can selfreparing shape-memory material crush, formed polyurethane powder two；
Step S4: by the polyurethane powder two in the case where pressure is 3~5 MPa, temperature is 110~140 DEG C hot pressing 20~
Hot pressing again is carried out after forty minutes；
Step S5: repeat step S3 and step S4, realize to it is described can selfreparing shape-memory material recycling.
Optionally, the step S5 are as follows:
Repeat step S3 and step S4 tetra- times, realize to it is described can selfreparing shape-memory material recycling.
Compared with prior art, the present invention includes the following advantages:
(1), one kind provided by the present invention can selfreparing shape-memory material, phenyl carbamates included by material
Key has preferable dynamic, and heat exchange can occur for the strand in polyurethane, therefore make it have at a certain temperature certainly
Repairing performance and cycling processability can heal again when material fracture, can regard former material for the material not being available
Material is reprocessed, and is reused；
(2), one kind provided by the present invention can selfreparing shape-memory material, have shape memory effect, when material is curved
Qu Shi can be restored to original shapes under heating conditions；
(3), one kind provided by the present invention can selfreparing shape-memory material preparation method and one kind can selfreparing
The recovery method of shape-memory material, in entire preparation and removal process, used reagent is conventional reagent, is easy to obtain
?；
(4), one kind provided by the present invention can selfreparing shape-memory material preparation method and one kind can selfreparing
The recovery method of shape-memory material is not necessarily to solvent in preparation and removal process, more environmentally-friendly, saves raw material.
Detailed description of the invention
Fig. 1 be the embodiment of the present invention it is a kind of for can selfreparing shape-memory material preparation method step process
Figure；
Fig. 2 be the embodiment of the present invention it is a kind of for can selfreparing shape-memory material recovery method step process
Figure；
Fig. 3 is the chemical synthesis schematic diagram of the polyurethane in specific example of the present invention；
Fig. 4 is the infared spectrum schematic diagram of the polyurethane in specific example of the present invention；
Fig. 5 is schematic diagram of the polyurethane at DSC in specific example of the present invention；
Fig. 6 is the thermogravimetric curve schematic diagram of the polyurethane in specific example of the present invention；
Fig. 7 is that the polyurethane in specific example of the present invention repeats crushing-hot-forming four stress-strain curves；
Fig. 8 is the interface fusion front and back stress-strain curve comparison of the polyurethane resin of different colours shape；
Fig. 9 is the shape memory curve graph of the polyurethane in specific example of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Currently, carbamate usually is reacted to obtain by isocyanates and alcoholic extract hydroxyl group, moved though urethane bond has
State property but its dynamic is poor so that its cross-linked network regulate the speed just become relatively slowly, do not have recyclability and from
Repairing performance.For this purpose, inventor has carried out a large amount of experimental study to existing carbamate, including to carbamate
Preparation process continuously adjusts, it is found that the dynamic of the urethane bond in prepared rear product is still poor, material
It can not be automatically repaired and be healed into as former state after fracture.
Therefore, inventor again improves the raw material of carbamate, have investigated it is a kind of have shape memory function,
The new material of recyclability and self-healing properties, next, by the structural principle to new material, preparation method and recycling side
Method carries out emphasis elaboration.
Firstly, propose one kind of the embodiment of the present invention can selfreparing shape-memory material, it is described can selfreparing shape memory
Material includes phenyl carbamates key, the dynamic reversible process of the phenyl carbamates key are as follows:
In embodiments of the present invention, can the phenyl carbamates key of selfreparing shape-memory material belong to a kind of mobilism
Key is learned, is made after being reacted by phenolic hydroxyl group with isocyanates, the positive reaction rate of the two is slower, adds in this kind of polyurethane material
Enter excessive dihydric phenols consumption isocyanates, accelerates the backward reaction of isocyanates and phenolic hydroxyl group, the long chain fracture of material
For short molecular chain, crosslink density reduction causes material to dissolve and makes its degradation, can under the conditions of this material is existing for the catalyst
Quickly to dissociate-recombinate, dynamic is relatively good, and in a short time can selfreparing (also demonstrate phenyl carbamates
Key has good dynamic), the crosslinked polymeric materials (can be regarded as polyurethane resin) constructed with it have to follow well
Ring utility and the performance that is recycled, also have excellent shape memory function.
For realize phenyl carbamates key above-mentioned characteristics and advantages, firstly, the embodiment of the present invention proposes a kind of needle
To can selfreparing shape-memory material preparation method, the step flow chart of preparation method may include following step referring to Fig.1
It is rapid:
Step S1: taking molar ratio is the ternary isocyanates and dihydric phenols of 2:3, is uniformly mixed after catalyst is added,
And be added in mixer, it is reacted 3~6 hours at 60 DEG C~100 DEG C, obtains polyurethane powder one；
Isocyanates belongs to a kind of organic multicomponent isocyanates applied to polyurethane resin, belongs to the main of polyurethane
One of synthesis material can be divided into binary isocyanates, ternary isocyanates and aggretion type isocyanates by the number of-NCO group
Three categories.Using ternary isocyanates in the preparation method of the embodiment of the present invention, ternary isocyanates is a kind of energy
With the esters containing active hydrogen reaction such as water, alcohol and amine, stablize under room temperature, chemical property is active.
In specific implementation, the ternary isocyanates can use hexamethylene diisocyanate to the embodiment of the present invention
Tripolymer, 4,4`, 4``- triphenylmethane triisocyanate or L-lysine triisocyanate are any one or more of.The present invention
Embodiment includes but is not limited to above-mentioned three kinds of materials, and there are also other materials for belonging to ternary isocyanates can be of the invention real
It applies in example and applies, not described here any more.
Phenol, general formula ArOH are the quasi-aromatic compounds that the hydrogen in fragrant hydrocarbon ring is replaced by hydroxyl (- OH).It is most simple
Single phenol is phenol.Phenolic compound refers to that the hydrogen atom in aromatic hydrocarbon on phenyl ring is optionally substituted by a hydroxyl group compound generated, root
Monohydric phenol and polyphenol can be divided into according to hydroxy number contained by its molecule.Using two in the preparation method of the embodiment of the present invention
First phenols, if other hydrogen on dihydric phenols phenyl ring do not replace only 3 kinds by other base: (1) adjacent: two-OH are adjacent；
(2) between: having-a H (3) right among two-OH: two-OH central symmetries.In specific implementation, dihydric phenols can be double
Phenol A, bisphenol S, Bisphenol F or bisphenol b P-AP are any one or more of.The embodiment of the present invention includes but be not limited to above-mentioned several materials
Material, there are also other materials for belonging to dihydric phenols can apply in embodiments of the present invention, not described here any more.
In order to make ternary isocyanates and dihydric phenols effecting reaction, the embodiment of the present invention is also added into catalyst.This
Catalyst in inventive embodiments can be dibutyl tin dilaurate, stannous octoate, triethylenediamine, pyridine, N- ethyl
Morpholine, diethylenetriamines, dimethylethanolamine, methyl diethanolamine, triethylamine, triethanolamine, N, N- lutidines
One or more of.The embodiment of the present invention includes but be not limited to above-mentioned different materials, there are also the materials that other belong to catalyst
Material can be applied in embodiments of the present invention, not described here any more.
By ternary isocyanates and dihydric phenols, 2:3 is equipped with the embodiment of the present invention in molar ratio, forms raw material one,
Then according to the additive amount of 0.1wt%~0.5wt%, above-mentioned one or more mixed catalyst are added in raw material one, and
It is added in mixer, is reacted 3~6 hours at 60 DEG C~100 DEG C, obtain polyurethane powder one.It should be noted that 60 DEG C
~100 DEG C and 3~6 hours are preferred preparation conditions that inventor is obtained after lot of experiments, this condition it
Outside, entirely can shape memory function, recyclability and the self-healing properties of selfreparing shape-memory material all can be significantly by shadow
It rings.
Next, hot-forming processing is carried out to the polyurethane powder one of acquisition, referring to step S2.
Step S2: by the polyurethane powder one in the case where pressure is 3~5 MPa, temperature is 110~140 DEG C hot pressing 20~
Carry out hot pressing after forty minutes, obtain it is described can selfreparing shape-memory material.
In one embodiment of the present invention, the preferred preparation condition of the step S2 are as follows:
By the polyurethane powder one, in the case where pressure is 4 MPa, temperature is 120 DEG C, hot pressing 20~after forty minutes carries out heat
Pressure, obtain it is described can selfreparing shape-memory material.
Secondly, the embodiment of the present invention propose it is a kind of for can selfreparing shape-memory material recovery method, step stream
Journey figure may comprise steps of referring to Fig. 2:
Step S3: to it is described can selfreparing shape-memory material crush, formed polyurethane powder two；
Step S4: by the polyurethane powder two in the case where pressure is 3~5 MPa, temperature is 110~140 DEG C hot pressing 20~
Hot pressing again is carried out after forty minutes；
Step S5: repeat step S3 and step S4, realize to it is described can selfreparing shape-memory material recycling.
In embodiments of the present invention, step S3 and step S4 can be considered the process restored to step S1 and step S2,
With this can realize to it is described can selfreparing shape-memory material recycling and reusing.Can selfreparing shape-memory material recycled
Recycling is usually in the case where reusing, for example becomes clast or leftover pieces etc..
In one embodiment of the present invention, the optimum condition of the step S5 are as follows:
Repeat step S3 and step S4 tetra- times, realize to it is described can selfreparing shape-memory material recycling.By four times
Repetition crush-hot-forming step, can the stretch modulus of selfreparing shape-memory material and disconnected in this cycle-index
Resistance to spalling can reach similar effect with freshly prepd material.The cycle-index of step S3 and step S4, with stretch modulus and disconnected
The specific experiment data of relationship will illustrate in example below between resistance to spalling.
It will be clear that in each embodiment or example of the invention, polyurethane powder, polyurethane powder one,
Polyurethane resin after polyurethane powder two or moulding is essentially all that polyurethane (reviews one's lessons by oneself complex for the embodiment of the present invention
Shape memory material)；Only powdered and product form is different.Here one and two is intended merely to distinguish, actually poly- ammonia
Ester powder, polyurethane powder one and polyurethane powder are second is that same thing.
For the ease of to can the properties of selfreparing shape-memory material verify, the present invention preferably will in instances
It is described can selfreparing shape memory material design be dumbbell shape.It, can be to can selfreparing it should be noted that in validation test
Shape-memory material carries out random-shaping, however it is not limited to dumbbell shape.
Specific example:
According to hexamethylene diisocyanate trimer: bisphenol-A=2:3 molar ratio, by the three of 45.0g, 0.089mol
First isocyanates, the dihydric phenols of 30.05g, 0.13mol and the dibutyl tin dilaurate of 0.02g, 0.03mmol are in beaker
In be uniformly mixed, then be added mixer in, stirred four hours at 80 DEG C and obtain the polyurethane white containing dynamic covalent bond
Powder, obtained powder is hot pressed under conditions of temperature is 120 DEG C, pressure is 4MPa dumbbell shape polyurethane resin (for
The embodiment of the present invention can selfreparing shape-memory material).The chemical synthesis schematic diagram of polyurethane in specific example of the present invention
Referring to Fig. 3.
In the following, the polyurethane resin or polyurethane powder to present example carry out following verifyings:
(1) thermodynamic property is verified
Using Fourier infrared spectrograph to after hot pressing film carry out infrared test, signal acquisition range be 400~
4000cm-1.Referring to fig. 4, in 2270cm in infrared figure-1The signal of left and right isocyanate group has disappeared, and shows isocyanate group
It has completely reacted, generates phenyl carbamates key.
It is tested using glass transition temperature of the differential scanning calorimeter to polyurethane, 10 DEG C/min of heating rate.
Referring to Fig. 5, by differential scanning calorimetry DSC, show that the glass transition temperature of polyurethane is 108 DEG C.Referring to Fig. 6, in order to
Further research polyurethane thermodynamic property, polyurethane material is tested using thermogravimetric analyzer, discovery along with
Temperature is increased to 185 DEG C, and it is 5% that polyurethane, which has only decomposed mass fraction, it was demonstrated that the existing good thermal stability of the resin.
(2) performance verification is reused
Polyurethane resin sample is crushed, polyurethane powder is formed；Then by polyurethane powder pressure be 3.5~
5 MPa, temperature are hot pressing 20~40 minutes polyurethane resins at " I " fonts shape at 110~140 DEG C, measure stretch modulus
For 0.85~1.42 GPa, polyurethane resin crushes hot repressing four times repeatedly, and obtained polyurethane resin stretch modulus is kept not
Become, illustrates that polyurethane resin has recycling performance.Crushing-is between hot press cycle number and stretch modulus and breaking strength
Relationship comparison chart compares relationship referring to table 1 referring to Fig. 7.
Table 1
(3) self-repairability is able to verify that
Referring to Fig. 8, by post-rift polyurethane resin sample in the case where pressure is 3.5~5 MPa, temperature is 110~140 DEG C
Hot pressing 20~after forty minutes, post-rift polyurethane resin is re-engaged completely, it was demonstrated that polyurethane resin of the invention is reviewed one's lessons by oneself
Renaturation energy.
(4) shape memory function is verified
Referring to Fig. 9, polyurethane resin sample is stretched 3 minutes extremely in the case where pulling force is 0.83 MPa, temperature is 120 DEG C
Then 0.09% elongation removes external stress and is heated to 120 DEG C by the shape of cooling fixed sample, sample recovery
To original shape, illustrate that polyurethane resin has shape memory function.
By examples detailed above it is found that one kind provided by the embodiment of the present invention can selfreparing shape-memory material, material institute
Including phenyl carbamates key there is preferable dynamic, heat exchange can occur for the strand in polyurethane, thus
Self-healing properties and cycling processability are made it have under certain temperature, in entire preparation and removal process, used reagent
It is conventional reagent, is easy to get；And solvent is not necessarily in preparation and removal process, and it is more environmentally-friendly, save raw material.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
Above to one kind provided by the present invention can selfreparing shape-memory material, one kind can selfreparing shape-memory material
Preparation method, and it is a kind of can selfreparing shape-memory material recovery method, be described in detail, it is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand originally
The method and its core concept of invention；At the same time, for those skilled in the art, according to the thought of the present invention, specific
There will be changes in embodiment and application range, in conclusion the content of the present specification should not be construed as to of the invention
Limitation.
Claims (10)
1. one kind can selfreparing shape-memory material, which is characterized in that it is described can selfreparing shape-memory material include amino first
Sour phenyl ester bond, the dynamic exchange process of the phenyl carbamates key are as follows:
2. for it is described can selfreparing shape-memory material preparation method, which is characterized in that the described method includes:
Step S1: taking molar ratio is the ternary isocyanates and dihydric phenols of 2:3, is uniformly mixed after catalyst is added, and add
Enter into mixer, is reacted 3~6 hours at 60 DEG C~100 DEG C, obtain polyurethane powder one；
Step S2: by the polyurethane powder one in the case where pressure is 3~5MPa, temperature is 110~140 DEG C hot pressing 20~40 minutes
After carry out hot pressing, obtain it is described can selfreparing shape-memory material.
3. according to the method described in claim 2, it is characterized in that, the ternary isocyanates is hexa-methylene diisocyanate
Ester tripolymer, 4,4`, 4``- triphenylmethane triisocyanate or L-lysine triisocyanate are any one or more of.
4. according to the method described in claim 2, it is characterized in that, the dihydric phenols are bisphenol-A, bisphenol S, Bisphenol F or double
Phenol BP-AP is any one or more of.
5. according to the method described in claim 2, it is characterized in that, the catalyst is dibutyl tin dilaurate, octanoic acid Asia
Tin, triethylenediamine, pyridine, N- dionin quinoline, diethylenetriamines, dimethylethanolamine, methyl diethanolamine, three second
Amine, triethanolamine, N, one or more of N- lutidines.
6. method according to claim 2 or 5, which is characterized in that the additive amount of the catalyst be 0.1wt%~
0.5wt%.
7. according to the method described in claim 2, it is characterized in that, the step S2 are as follows:
By the polyurethane powder one, the hot pressing 20~carry out hot pressing after forty minutes in the case where pressure is 4MPa, temperature is 120 DEG C, is obtained
It is described can selfreparing shape-memory material.
8. according to the method described in claim 2, it is characterized in that, by described in prepared by step S2 can selfreparing shape remember
Recalling material is dumbbell shape.
9. for it is described can selfreparing shape-memory material recovery method, which is characterized in that the described method includes:
Step S3: to it is described can selfreparing shape-memory material crush, formed polyurethane powder two；
Step S4: by the polyurethane powder two in the case where pressure is 3~5MPa, temperature is 110~140 DEG C hot pressing 20~40 minutes
Another warm pressure is carried out afterwards；
Step S5: repeat step S3 and step S4, realize to it is described can selfreparing shape-memory material recycling.
10. according to the method described in claim 9, it is characterized in that, the step S5 are as follows:
Repeat step S3 and step S4 tetra- times, realize to it is described can selfreparing shape-memory material recycling.
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| CN111333807A (en) * | 2020-02-27 | 2020-06-26 | 西安交通大学 | Phenolic-based renewable high polymer material, and preparation method and regeneration application thereof |
| CN111848918A (en) * | 2020-06-28 | 2020-10-30 | 梅其勇 | Biodegradable polyurethane for intravascular stent and synthesis method thereof |
| CN112358596A (en) * | 2020-10-29 | 2021-02-12 | 中国林业科学研究院林产化学工业研究所 | Cardanol-based shape memory polymer and preparation method thereof |
| CN113736066A (en) * | 2020-05-28 | 2021-12-03 | 中国工程物理研究院化工材料研究所 | Shape memory epoxy resin with adjustable recovery stress and recovery stress regulation and control method of shape memory epoxy resin |
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