CN115654052A - Compression type tubular shape memory composite structure and manufacturing method thereof - Google Patents
Compression type tubular shape memory composite structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN115654052A CN115654052A CN202211274063.7A CN202211274063A CN115654052A CN 115654052 A CN115654052 A CN 115654052A CN 202211274063 A CN202211274063 A CN 202211274063A CN 115654052 A CN115654052 A CN 115654052A
- Authority
- CN
- China
- Prior art keywords
- shape memory
- tubular
- knitting
- reinforcement
- composite structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Moulding By Coating Moulds (AREA)
- Knitting Of Fabric (AREA)
Abstract
A compression-type tubular shape memory composite structure comprising: the tubular knitted reinforcement is in a cylindrical knitted fabric structure consisting of weft plain tubular fabrics and spiral reinforcing fibers, the shape memory polymer coating is filled in gaps inside the hybrid fabric reinforcement, and the shape memory polymer coating is wrapped on the inner and outer circumferential surfaces of the hybrid fabric reinforcement. During manufacturing, the method comprises the steps of weaving, preprocessing, injecting glue, heating and curing and demoulding. The design not only can improve the restoring force of the tubular shape memory composite structure, but also has good shape fixing rate and shape restoring rate.
Description
Technical Field
The invention relates to a compression type tubular shape memory composite structure and a manufacturing method thereof, which are particularly suitable for optimizing the manufacturing process and improving the compression recovery rate and the recovery force of the tubular shape memory composite structure.
Background
With the development and wide application of intelligent materials and structures, shape memory polymers become a research hotspot, but the shape memory polymers have the defects of low modulus, poor strength, small restoring force and the like. Although the shape memory composite material overcomes the defects, the shape memory composite material with special structures such as tubular and honeycomb shapes is difficult to integrally form and prepare, and the application range of the shape memory composite material is greatly limited.
The shape memory composite materials are currently available and are specified as follows: CN 104589672A discloses a method for preparing a shape memory composite material, and the prepared shape memory composite material is generally a plate, and the application range is very limited. The existing shape memory composite material with a special structure is specialized as follows: CN103438090A discloses a tubular shape memory composite material hinge which is formed by bonding two approximately semicircular thin shell composite materials; CN112298613A discloses a composite material bean pod rod controlled to be folded and unfolded based on a shape memory composite material, which is prepared by bonding two approximately semicircular thin shell materials and bonding discrete shape memory composite material sheets on the outer surface. The tubular shape memory composite material is prepared by bonding a plurality of components, is not integrally formed, and has complex preparation process and long flow.
Therefore, how to integrally prepare a tubular high-performance shape memory composite material is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to overcome the problems of low modulus, poor strength and small restoring force of a memory polymer in the prior art, and provides an integrally molded compression type tubular shape memory composite structure with improved strength, modulus and restoring force and a manufacturing method thereof.
In order to achieve the above purpose, the technical solution of the invention is as follows:
a compression-type tubular shape memory composite structure, the composite structure comprising: the shape memory polymer coating is filled in the gap inside the hybrid fabric reinforcement, and the shape memory polymer coating is wrapped on the inner and outer circumferential surfaces of the hybrid fabric reinforcement.
The tubular knit reinforcement includes: the tubular weft plain knitted fabric is a tubular fabric knitted by a flat knitting machine in a weft plain manner.
The tubular knit reinforcement further includes: the spiral reinforcing fiber is inserted into the tubular weft plain knitted fabric in a spiral shape.
The knitting density of the tubular knitting reinforcement body in the transverse direction is 15-25 needles/5 cm, and the knitting density of the tubular knitting reinforcement body in the longitudinal direction is 15-25 needles/5 cm.
The hybrid fabric reinforcement is made of fibers with tensile strength of more than 2000 MPa;
the shape memory polymeric wrap is made of a shape memory polymer material.
The tubular knit reinforcement includes: the composite material comprises a tubular weft plain knitted fabric and spiral reinforcing fibers, wherein the tubular weft plain knitted fabric is made of glass fibers, carbon fibers or basalt fibers of 60 to 400tex;
the spiral reinforced fiber is made of 60 to 240tex glass fiber, carbon fiber, stainless steel fiber or basalt fiber;
the shape memory polymer package is prepared by vacuum negative pressure infusion of shape memory epoxy resin, shape memory polystyrene or shape memory polyimide in a mould.
A method of manufacturing a compression-type tubular shape memory composite structure, the method of manufacturing being based on a forming die comprising: the outer sleeve is coaxially sleeved outside the inner sleeve seat, the bottom of the outer sleeve is matched with the bottom plate of the inner sleeve seat, and the ring cover is sleeved on the inner sleeve seat and matched with the top of the outer sleeve; the bottom plate of the inner sleeve seat is provided with at least two shape memory material injection ports, and the ring cover is provided with at least two exhaust overflow ports;
the manufacturing method comprises the following steps:
step one, knitting, namely adjusting parameters of a needle raising triangle on a flat knitting machine so as to adjust the knitting transverse knitting density, the knitting longitudinal knitting density and the knitting shape, and weaving a tubular weft plain knitted fabric on the flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa to obtain tubular knitting reinforcement matched with a forming mold;
step two, preprocessing, namely uniformly coating a release agent on the inner sleeve seat, the outer sleeve and the ring cover, sleeving the outer sleeve on the inner sleeve seat to enable the inner sleeve seat and the outer sleeve to be coaxial, then bonding the outer sleeve on the inner sleeve seat by adopting high-temperature glue from the outside to seal the joint of the inner sleeve seat and the outer sleeve, putting the knitted tubular knitting reinforcement into an annular groove between the inner sleeve seat and the outer sleeve, covering the ring cover on the outer sleeve, bonding the ring cover with the gap between the inner sleeve seat and the outer sleeve from the outside by adopting high-temperature glue, and sealing the joint between the ring cover and the inner sleeve seat as well as the outer sleeve;
thirdly, injecting glue, namely connecting the forming die assembled in the second step with a shape memory polymer injection device, and injecting the shape memory polymer into the forming die in a negative pressure environment of 0.01 to 0.1MPa until the shape memory polymer overflowing from the exhaust overflow port is uniform and has no bubbles, and then injecting the glue;
step four, heating and curing, namely putting the molded die subjected to glue injection into an oven, firstly preserving heat for 2-3 h at the temperature of 90-110 ℃, then preserving heat for 8-10 h at the temperature of 120-150 ℃, and finally naturally cooling to room temperature at the normal temperature, wherein the curing is finished;
and step five, demolding, namely removing the high-temperature glue on the surface of the solidified forming mold, and then sequentially taking off the outer sleeve and the inner sleeve seat of the ring cover to obtain the tubular shape memory composite structure.
In the first step, in the weaving, the tubular weft plain knitted fabric is woven on a flat knitting machine by adopting the fibers with the tensile strength of more than 2000MPa, and meanwhile, in the weaving process, the lining yarn tissue weaving process is adopted, and the spiral reinforced fibers are woven into the tubular weft plain knitted fabric and are arranged spirally to obtain the tubular knitted reinforcement matched with the forming mold.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the compression type tubular shape memory composite structure, the tubular knitted fabric is compounded in the shape memory material, the tubular weft plain knitted fabric has good deformation capacity, the restoring force, the modulus and the strength of the tubular shape memory composite structure are improved by utilizing the strength of the fiber knitted body, and the performance of the tubular shape memory composite structure is optimized. Therefore, the design can improve the restoring force of the tubular shape memory composite structure and optimize the performance of the tubular shape memory composite structure.
2. According to the compression type tubular shape memory composite structure, the tubular knitted fabric is compounded in the shape memory material, the tubular weft plain knitted fabric has good deformation capacity and small deformation difficulty, so that the design can improve the recovery rate of the tubular shape memory composite structure and shorten the recovery time.
3. According to the compression type tubular shape memory composite structure, the spiral reinforcing fibers are adopted to further enhance and improve the restoring force of the tubular shape memory composite structure, the spiral reinforcing fibers can promote the restoring force of the tubular shape, so that the restoring force of the spiral reinforcing fibers is more than 7 times that of a pure shape memory polymer material, and the application field of the shape memory composite material is expanded. Therefore, the design further enhances the restoring force of the tubular shape memory composite structure through the spiral reinforcing fibers, and further optimizes the mechanical property of the tubular shape memory composite structure.
4. According to the manufacturing method of the compression type tubular shape memory composite structure, the tubular weft plain knitted fabric is integrally knitted by using a flat knitting machine, then the tubular shape memory composite structure is manufactured by using a mold, and finally the tubular shape memory composite structure is cured and shaped by using an oven for heat treatment. Therefore, the design and manufacturing process is reasonable in design and is beneficial to improving the mechanical property of the structure.
5. The manufacturing method of the compression type tubular shape memory composite structure adopts the knitting and weaving technology and the lining yarn tissue weaving technology to integrally prepare the tubular knitted fabric reinforcing material containing the spiral reinforcing fibers, and then the reinforcing material and the shape memory polymer material are solidified into the composite material. The tubular weft plain knitted fabric has better deformability, the spiral reinforcing fiber can promote the recovery of the tubular shape, the shape fixing rate of the tubular shape memory composite material can reach more than 98 percent, the shape recovery rate can reach more than 98 percent, the recovery force can reach more than 7 times of that of a pure shape memory polymer material, and the application field of the shape memory composite material is widened.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the compression state of the present invention.
Fig. 3 is a schematic structural view of a forming die in the manufacturing method of the present invention.
FIG. 4 is a schematic representation of a sample variation tested in an example of the invention.
In the figure: a tubular knitting reinforcement 1, a tubular weft plain knitted fabric 11, a spiral reinforced fiber 12, a tubular shape memory polymer package 2, a forming mold 3, an inner sleeve seat 31, an outer sleeve 32, a ring cover 33, a shape memory material filling opening 34 and an exhaust overflow opening 35.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description of the invention.
Referring to fig. 1-3, a compression-type tubular shape memory composite structure, the composite structure comprising: the composite fabric reinforcement comprises a tubular knitted reinforcement 1 and a tubular shape memory polymer coating 2, wherein the tubular knitted reinforcement 1 is in a cylindrical knitted fabric structure, the shape memory polymer coating 2 is filled in gaps inside the hybrid fabric reinforcement 1, and the shape memory polymer coating 2 is wrapped on the inner circumferential surface and the outer circumferential surface of the hybrid fabric reinforcement 1.
The tubular knitted reinforcement 1 comprises: a tubular weft plain knitted fabric 11, wherein the tubular weft plain knitted fabric 11 is a tubular fabric knitted by a weft plain method using a flat knitting machine.
The tubular knitted reinforcement 1 further comprises: and the spiral reinforcing fibers 12, wherein the spiral reinforcing fibers 12 are spirally inserted into the tubular weft plain knitted fabric 11.
The knitting density of the tubular knitting reinforcement body 1 in the transverse direction is 15-25 needles/5 cm, and the knitting density of the tubular knitting reinforcement body 1 in the longitudinal direction is 15-25 needles/5 cm.
The hybrid fabric reinforcement 1 is made of fibers with tensile strength of more than 2000 MPa;
the shape memory polymer wrap 2 is made of a shape memory polymer material.
The tubular knitted reinforcement 1 comprises: the composite material comprises a tubular weft plain knitted fabric 11 and spiral reinforcing fibers 12, wherein the tubular weft plain knitted fabric 11 is made of glass fibers, carbon fibers or basalt fibers from 60 to 400tex;
the spiral reinforced fiber 12 is made of glass fiber, carbon fiber, stainless steel fiber or basalt fiber with the temperature of 60 to 240tex;
the shape memory polymer package 2 is made of shape memory epoxy resin, shape memory polystyrene or shape memory polyimide by vacuum negative pressure infusion in a mould.
A manufacturing method of a compression-type tubular shape memory composite structure, based on a forming die 3, the forming die 3 comprising: the outer sleeve 32 is coaxially sleeved outside the inner sleeve seat 31, the bottom of the outer sleeve 32 is matched with the bottom plate of the inner sleeve seat 31, and the ring cover 33 is sleeved on the inner sleeve seat 31 and matched with the top of the outer sleeve 32; the bottom plate of the inner sleeve seat 31 is provided with at least two shape memory material injection ports 34, and the ring cover 33 is provided with at least two exhaust overflow ports 35;
the manufacturing method comprises the following steps:
step one, knitting, namely adjusting parameters of a needle raising triangle on a flat knitting machine so as to adjust the knitting transverse knitting density, the knitting longitudinal knitting density and the knitting shape, and weaving a tubular weft plain knitted fabric 11 on the flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa to obtain a tubular knitting reinforcement 1 matched with a forming mold 3;
step two, pretreatment, namely uniformly coating a release agent on the inner sleeve seat 31, the outer sleeve 32 and the ring cover 33, sleeving the outer sleeve 32 on the inner sleeve seat 31 to enable the outer sleeve and the inner sleeve seat 31 to be coaxial, then bonding the outer sleeve 32 on the inner sleeve seat 31 from the outside by adopting high-temperature glue to seal the joint of the inner sleeve seat 31 and the outer sleeve 32, putting the knitted tubular knitting reinforcement body 1 into an annular groove between the inner sleeve seat 31 and the outer sleeve 32, covering the ring cover 33 on the outer sleeve 32, bonding a gap between the ring cover 33 and the inner sleeve seat 31 and the outer sleeve 32 from the outside by adopting high-temperature glue, and sealing the joint between the ring cover 33 and the inner sleeve seat 31 as well as the joint between the ring cover 33 and the outer sleeve 32;
thirdly, injecting glue, namely connecting the forming die 3 assembled in the second step with a shape memory polymer injection device, and injecting the shape memory polymer into the forming die 3 in a negative pressure environment of 0.01 to 0.1MPa until the shape memory polymer overflowing from the exhaust overflow port 35 is uniform and no air bubbles exist, and injecting the glue;
step four, heating and curing, namely putting the forming die 3 subjected to glue injection into an oven, firstly preserving heat for 2-3 h at the temperature of 90-110 ℃, then preserving heat for 8-10 h at the temperature of 120-150 ℃, and finally naturally cooling to room temperature at the normal temperature, wherein the curing is finished;
and step five, demolding, namely removing the high-temperature glue on the surface of the solidified forming mold 3, and then sequentially removing the ring cover 33, the outer sleeve 32 and the inner sleeve seat 31 to obtain the tubular shape memory composite structure.
In the first step, in the weaving, the tubular weft plain knitted fabric 11 is woven on a flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted, and the spiral reinforced fibers 12 are woven into the tubular weft plain knitted fabric 11 and are arranged spirally to obtain the tubular knitted reinforcement 1 matched with the forming mold 3.
The principle of the invention is illustrated as follows:
the invention relates to a method for knitting a tubular knitted fabric in a shape memory material by compounding the tubular knitted fabric in the shape memory material and selecting high-strength fibers to knit the tubular knitted fabric into the knitted fabric, which comprises the following steps: the tubular weft plain knitted fabric 11 and the spiral reinforcing structure of the spiral reinforcing fibers 12 effectively increase the restoring force of the shape memory material and effectively improve the mechanical property of the shape memory material.
Example 1:
a compression-type tubular shape memory composite structure, the composite structure comprising: the composite fabric reinforcement comprises a tubular knitted reinforcement 1 and a tubular shape memory polymer coating 2, wherein the tubular knitted reinforcement 1 is in a cylindrical knitted fabric structure, the shape memory polymer coating 2 is filled in gaps inside the hybrid fabric reinforcement 1, and the shape memory polymer coating 2 is wrapped on the inner circumferential surface and the outer circumferential surface of the hybrid fabric reinforcement 1.
The tubular knitted reinforcement 1 comprises: a tubular weft plain knitted fabric 11, wherein the tubular weft plain knitted fabric 11 is a tubular fabric knitted by a weft plain method using a flat knitting machine.
The knitting density of the tubular knitting reinforcement body 1 in the transverse direction is 15-25 needles/5 cm, and the knitting density of the tubular knitting reinforcement body 1 in the longitudinal direction is 15-25 needles/5 cm.
The hybrid fabric reinforcement 1 is made of fibers with tensile strength of more than 2000 MPa;
the shape memory polymer wrap 2 is made of a shape memory polymer material.
The tubular weft plain knitted fabric 11 is made of glass fibers, carbon fibers or basalt fibers of 60 to 400tex;
the shape memory polymer wrap 2 is made of shape memory epoxy resin, shape memory polystyrene or shape memory polyimide by vacuum negative pressure infusion in a mould.
A manufacturing method of a compression-type tubular shape memory composite structure, based on a forming die 3, the forming die 3 comprising: the outer sleeve 32 is coaxially sleeved outside the inner sleeve seat 31, the bottom of the outer sleeve 32 is matched with the bottom plate of the inner sleeve seat 31, and the ring cover 33 is sleeved on the inner sleeve seat 31 and matched with the top of the outer sleeve 32; the bottom plate of the inner sleeve seat 31 is provided with at least two shape memory material injection ports 34, and the ring cover 33 is provided with at least two exhaust overflow ports 35;
the manufacturing method comprises the following steps:
step one, knitting, namely adjusting parameters of a needle raising triangle on a flat knitting machine so as to adjust the knitting transverse knitting density, the knitting longitudinal knitting density and the knitting shape, and weaving a tubular weft plain knitted fabric 11 on the flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa to obtain a tubular knitting reinforcement 1 matched with a forming mold 3;
step two, pretreatment, namely uniformly coating a release agent on the inner sleeve seat 31, the outer sleeve 32 and the ring cover 33, sleeving the outer sleeve 32 on the inner sleeve seat 31 to enable the inner sleeve seat and the outer sleeve to be coaxial, then bonding the outer sleeve 32 on the inner sleeve seat 31 from the outside by adopting high-temperature glue to seal the joint of the inner sleeve seat 31 and the outer sleeve 32, putting the knitted tubular knitting reinforcement body 1 into an annular groove between the inner sleeve seat 31 and the outer sleeve 32, covering the ring cover 33 on the outer sleeve 32, bonding the gap between the ring cover 33 and the inner sleeve seat 31 and the outer sleeve 32 from the outside by adopting high-temperature glue to seal the joint between the ring cover 33 and the inner sleeve seat 31 and the outer sleeve 32;
thirdly, injecting glue, namely connecting the forming die 3 assembled in the second step with a shape memory polymer injection device, and injecting the shape memory polymer into the forming die 3 in a negative pressure environment of 0.01 to 0.1MPa until the shape memory polymer overflowing from the exhaust overflow port 35 is uniform and has no bubbles, and then injecting the glue;
step four, heating and curing, namely putting the molded die 3 subjected to glue injection into an oven, firstly preserving heat for 2-3 h at the temperature of 90-110 ℃, then preserving heat for 8-10 h at the temperature of 120-150 ℃, and finally naturally cooling to room temperature at the normal temperature, wherein curing is finished;
and step five, demolding, namely removing the high-temperature glue on the surface of the solidified forming mold 3, and then sequentially removing the ring cover 33, the outer sleeve 32 and the inner sleeve seat 31 to obtain the tubular shape memory composite structure.
Example 2:
example 2 is substantially the same as example 1 except that:
the tubular knitted reinforcement 1 further comprises: and the spiral reinforcing fibers 12, wherein the spiral reinforcing fibers 12 are spirally inserted into the tubular weft plain knitted fabric 11.
The spiral reinforced fiber 12 is made of glass fiber, carbon fiber, stainless steel fiber or basalt fiber with the temperature of 60 to 240tex.
In the step one, in the weaving, the tubular weft plain knitted fabric 11 is woven on a flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa, and meanwhile, in the weaving process, the lining yarn tissue weaving process is adopted, and the spiral reinforced fibers 12 are woven into the tubular weft plain knitted fabric 11 and are arranged in a spiral shape, so that the tubular knitted reinforced body 1 matched with the forming mold 3 is obtained.
Example 3:
example 3 is substantially the same as example 2 except that:
in the step one, in the weaving, 198tex glass fibers are adopted to weave the tubular weft plain knitted fabric 11 on a flat knitting machine, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted to weave the 198tex glass fibers into the tubular weft plain knitted fabric 11 to obtain spiral reinforcing fibers 12;
in the step three, injecting glue, injecting the shape memory polymer into the forming die 3 in a negative pressure environment of 0.08MPa, and injecting glue until the shape memory polymer overflows from the exhaust overflow port 35;
and step four, in the heating solidification, the molding die 3 subjected to glue injection is placed into an oven, heat preservation is carried out for 2 hours at the temperature of 100 ℃, heat preservation is carried out for 8 hours at the temperature of 140 ℃, and the molding die is naturally cooled to room temperature at the normal temperature, so that solidification is finished. The composite material prepared by adopting the glass fiber has the advantage of low cost.
Example 4:
example 4 is essentially the same as example 3, except that:
in the step one, in the weaving, 71tex carbon fibers are adopted to weave the tubular weft plain knitted fabric 11 on a flat knitting machine, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted to weave the 71tex carbon fibers into the tubular weft plain knitted fabric 11 to obtain spiral reinforcing fibers 12; the composite material prepared by the carbon fiber has the advantages of light weight and high strength.
Example 5:
example 5 is essentially the same as example 3, except that:
in the first step, in the weaving, 71tex carbon fiber is adopted to weave the tubular weft plain knitted fabric 11 on a flat knitting machine, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted to weave 70tex stainless steel fiber into the tubular weft plain knitted fabric 11 to obtain the spiral reinforcing fiber 12.
Example 6:
example 6 is essentially the same as example 2, except that:
in the first step, in the weaving, 396tex glass fiber is adopted to weave the tubular weft plain knitted fabric 11 on a flat knitting machine, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted to weave 198tex glass fiber into the tubular weft plain knitted fabric 11 to obtain spiral reinforced fiber 12;
in the step three, injecting glue, injecting the shape memory polymer into the forming die 3 in a negative pressure environment of 0.09MPa, and injecting glue until the shape memory polymer overflows from the exhaust overflow port 35;
and step four, in the heating solidification, the molding die 3 subjected to glue injection is placed into an oven, heat preservation is carried out for 2 hours at the temperature of 100 ℃, heat preservation is carried out for 10 hours at the temperature of 150 ℃, and the molding die is naturally cooled to room temperature at the normal temperature, so that solidification is finished. The glass fiber is adopted to prepare the composite material, and the composite material has the advantages of high fiber volume content and low cost.
Comparative example 1:
the comparative example is to prepare the pure shape memory polymer material, uniformly coating a release agent on a tubular composite material forming die 3, sealing the tubular composite material forming die 3 by adopting high-temperature glue, fully filling the die with the shape memory polymer material by utilizing the negative pressure of 0.02MPa, preserving the heat in an oven at 100 ℃ for 2h, and preserving the heat at 140 ℃ for 8h to finish the temperature programming and curing process, thereby obtaining the pure shape memory polymer material.
The diameter and thickness of the finished products of example 4 and example 5 are the same as those of the finished product of comparative example 1, and the finished products of example 4 and example 5 and comparative example 1 are cut into test samples with the length of 25mm, and are used for the following experimental tests:
shape fixation and shape recovery test:
referring to fig. 4, a tubular specimen was compressed in the radial direction at 100 ℃ by 80%, after which the recovery of the specimen was observed in an oven. The experimental steps are as follows:
1) Using universal with temperature boxThe material testing machine heats the tubular sample to 100 ℃, and the initial ring height of the sample is L 1 ；
2) The sample is compressed by 80 percent, and the height of the sample circle is L 2 The temporary shape of (a);
3) Keeping the compression of the sample unchanged, cooling the sample to room temperature, allowing the sample to rebound slightly, increasing the loop height of the sample to L 3 ；
4) Putting the cooled sample into a 100 ℃ oven, shooting the recovery process of the sample by using a high-definition camera, and finally recovering the sample ring height to L 4 。
Shape fixation rate of specimen = (L) 1 -L 3 )/(L 1 -L 2 )；
Shape recovery rate of sample = (L) 4 -L 3 )/(L 1 -L 3 )。
The sample of example 4 had a shape fixing ratio of 99.6% and a shape recovery ratio of 98.3%, and the sample of example 5 had a shape fixing ratio of 98.1% and a shape recovery ratio of 99.5%. The sample of comparative example 1 had a shape fixing ratio of 99.8% and a shape recovery ratio of 99.2%.
Testing the shape restoring force:
referring to fig. 4, the tubular specimen was compressed in the radial direction by 80% at 100 c, and then the specimen was tested for restoring force in an oven.
1) Using a universal material testing machine with a temperature box, heating a tubular sample to 100 ℃, wherein the initial ring height of the sample is L 1 ；
2) The sample is compressed by 80 percent, and the height of the sample circle is L 2 The temporary shape of (a);
3) Keeping the compression of the sample unchanged, cooling the sample to room temperature, allowing the sample to rebound slightly, increasing the loop height of the sample to L 3 ；
4) And (3) placing the cooled sample on a compression clamp, keeping the displacement of the clamp unchanged, heating the sample in an oven until the sample generates glass transition, and measuring the restoring force of the sample.
Comparative example 1 the pure shape memory polymer material had a recovery force of 3.3N, example 4 the tubular shape memory composite had a recovery force of 22.5N, example 5 the tubular shape memory composite had a recovery force of 25.7N, and the tubular shape memory composite of the present invention had a recovery force that was 7.8 times that of the pure shape memory polymer material.
The tests are completed by adopting an ETM105D microcomputer controlled electronic universal tester produced by Shenzhen Wanzhen testing equipment Limited company.
Claims (8)
1. A compression-type tubular shape memory composite structure characterized by:
the composite structure includes: the fabric comprises a tubular knitted reinforcement (1) and a tubular shape memory polymer coating (2), wherein the tubular knitted reinforcement (1) is in a cylindrical knitted fabric structure, the shape memory polymer coating (2) is filled in gaps inside the hybrid fabric reinforcement (1), and meanwhile the shape memory polymer coating (2) is wrapped on the inner circumferential surface and the outer circumferential surface of the hybrid fabric reinforcement (1).
2. The compression-type tubular shape memory composite structure of claim 1, wherein:
the tubular knitted reinforcement (1) comprises: the tubular weft plain knitted fabric (11) is a tubular knitted fabric which is knitted by a flat knitting machine in a weft plain knitting manner.
3. The compression-type tubular shape memory composite structure of claim 2, wherein:
the tubular knitted reinforcement (1) further comprises: the spiral reinforcing fiber (12), the spiral reinforcing fiber (12) is in the form of heliciform and interpenetrated in the tubular weft plain knitted fabric (11).
4. A compression-type tubular shape memory composite structure according to claim 1, 2 or 3, wherein:
the knitting density of the tubular knitting reinforcement body (1) in the transverse direction is 15-25 needles/5 cm, and the knitting density of the tubular knitting reinforcement body (1) in the longitudinal direction is 15-25 needles/5 cm.
5. The compression-type tubular shape memory composite structure of claim 4, wherein:
the hybrid fabric reinforcement (1) is made of fibers with the tensile strength of more than 2000 MPa;
the shape memory polymer coating (2) is made of shape memory polymer materials.
6. The compression-type tubular shape memory composite structure of claim 5, wherein:
the tubular knitted reinforcement (1) comprising: the composite material comprises a tubular weft plain knitted fabric (11) and spiral reinforcing fibers (12), wherein the tubular weft plain knitted fabric (11) is made of glass fibers, carbon fibers or basalt fibers of 60 to 400tex;
the spiral reinforced fiber (12) is made of glass fiber, carbon fiber, stainless steel fiber or basalt fiber with the temperature of 60 to 240tex;
the shape memory polymer coating (2) is prepared by vacuum negative pressure infusion of shape memory epoxy resin, shape memory polystyrene or shape memory polyimide in a mould.
7. A method of manufacturing a compression-type tubular shape memory composite structure according to any one of claims 1 to 6, wherein:
the manufacturing method is based on a forming die (3), the forming die (3) comprising: the outer sleeve is coaxially sleeved outside the inner sleeve seat (31), the bottom of the outer sleeve (32) is matched with the bottom plate of the inner sleeve seat (31), and the ring cover (33) is sleeved on the inner sleeve seat (31) and matched with the top of the outer sleeve (32); the bottom plate of the inner sleeve seat (31) is provided with at least two shape memory material injection ports (34), and the ring cover (33) is provided with at least two exhaust overflow ports (35);
the manufacturing method comprises the following steps:
step one, knitting, namely adjusting parameters of a needle raising triangle on a flat knitting machine so as to adjust the knitting transverse knitting density, the knitting longitudinal knitting density and the knitting shape, and weaving a tubular weft plain knitted fabric (11) on the flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa to obtain a tubular knitting reinforcement (1) matched with a forming mold (3);
step two, preprocessing, uniformly coating a release agent on an inner sleeve seat (31), an outer sleeve (32) and a ring cover (33), sleeving the outer sleeve (32) on the inner sleeve seat (31) to enable the outer sleeve and the inner sleeve seat to be coaxial, then fixing the outer sleeve (32) on the inner sleeve seat (31) by adopting high-temperature glue from the outside to seal the joint of the inner sleeve seat (31) and the outer sleeve (32), putting the knitted tubular knitting reinforcement body (1) into an annular groove between the inner sleeve seat (31) and the outer sleeve (32), covering the ring cover (33) on the outer sleeve (32), and adopting the high-temperature glue to bond a gap between the ring cover (33) and the inner sleeve seat (31) and the outer sleeve (32) from the outside to seal the joint between the ring cover (33) and the inner sleeve seat (31) and the outer sleeve (32);
thirdly, injecting glue, namely connecting the forming die (3) assembled in the second step with a shape memory polymer injection device, and injecting the shape memory polymer into the forming die (3) in a negative pressure environment of 0.01 to 0.1Mpa until the shape memory polymer overflows from the exhaust overflow port (35) uniformly and no bubbles exist, and then injecting the glue;
step four, heating and curing, namely putting the molding die (3) subjected to glue injection into an oven, firstly preserving heat for 2-3 h at the temperature of 90-110 ℃, then preserving heat for 8-10 h at the temperature of 120-150 ℃, and finally naturally cooling to room temperature at the normal temperature, wherein the curing is finished;
and step five, demolding, namely removing the high-temperature glue on the surface of the solidified forming mold (3), and then sequentially removing the ring cover (33), the outer sleeve (32) and the inner sleeve seat (31) to obtain the tubular shape memory composite structure.
8. The method of manufacturing a compression-type tubular shape memory composite structure as claimed in claim 7, wherein:
in the first step, in the weaving, the tubular weft plain knitted fabric (11) is woven on a flat knitting machine by adopting fibers with the tensile strength of more than 2000MPa, and meanwhile, in the weaving process, a lining yarn tissue weaving process is adopted, and the spiral reinforcing fibers (12) are woven into the tubular weft plain knitted fabric (11) and are arranged spirally to obtain the tubular knitting reinforcing body (1) matched with the forming mold (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274063.7A CN115654052B (en) | 2022-10-18 | 2022-10-18 | Compression type tubular shape memory composite structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274063.7A CN115654052B (en) | 2022-10-18 | 2022-10-18 | Compression type tubular shape memory composite structure and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115654052A true CN115654052A (en) | 2023-01-31 |
| CN115654052B CN115654052B (en) | 2023-06-30 |
Family
ID=84989512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211274063.7A Active CN115654052B (en) | 2022-10-18 | 2022-10-18 | Compression type tubular shape memory composite structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115654052B (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186987A (en) * | 1990-04-10 | 1993-02-16 | Ashimori Industry Co., Ltd. | Lining material for pipe lines and a process for providing pipe lines therewith |
| US20020062546A1 (en) * | 2000-07-07 | 2002-05-30 | Obeshaw Dale Francis | Coated contoured crushable structural members and methods for making the same |
| US20080315466A1 (en) * | 2004-06-04 | 2008-12-25 | Cornerstone Research Group, Inc. | High Speed Manufacturing Using Shape Memory Polymer Composites |
| CN101495069A (en) * | 2006-07-07 | 2009-07-29 | 波士顿科学有限公司 | Endoprosthesis delivery system with stent holder |
| CN103398240A (en) * | 2013-06-09 | 2013-11-20 | 哈尔滨工业大学 | Shape memory polymer variable-stiffness tube and manufacturing method thereof |
| CN205951331U (en) * | 2016-08-08 | 2017-02-15 | 西安超码复合材料有限公司 | Resin transfer molding forming die |
| CN107599908A (en) * | 2017-10-12 | 2018-01-19 | 山东大学 | A kind of deformable safety seat of fibre reinforced and preparation method thereof |
| CN109096699A (en) * | 2018-07-10 | 2018-12-28 | 哈尔滨工业大学 | A kind of electric drive shape memory polymer composite material and preparation method thereof |
| US10391684B1 (en) * | 2016-11-30 | 2019-08-27 | Spintech, LLC | Cauls and methods of using cauls to produce composite articles |
| CN209800177U (en) * | 2018-10-12 | 2019-12-17 | 中国地质大学（武汉） | Carbon nano tube fiber composite shape memory alloy type driver |
| CN111050835A (en) * | 2017-09-05 | 2020-04-21 | 苏黎世联邦理工学院 | Steerable catheter with sections of different stiffness |
| CN111575867A (en) * | 2020-05-26 | 2020-08-25 | 苏州海天运动器材有限公司 | Novel elastic net material for trampoline |
| CN111936090A (en) * | 2018-04-09 | 2020-11-13 | 波士顿科学国际有限公司 | Support frame |
| CN113813090A (en) * | 2021-08-12 | 2021-12-21 | 广东富江医学科技有限公司 | Support and preparation method thereof |
| CN114599418A (en) * | 2019-06-15 | 2022-06-07 | 马杜罗探索有限责任公司 | Conduit structure |
| CN114801355A (en) * | 2022-04-11 | 2022-07-29 | 武汉纺织大学 | High-composite-strength multilayer heat insulation material and application thereof |
| CN217074258U (en) * | 2022-04-20 | 2022-07-29 | 广东工业大学 | Energy absorption box with nickel-titanium shape memory alloy braided structure interlayer |
-
2022
- 2022-10-18 CN CN202211274063.7A patent/CN115654052B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186987A (en) * | 1990-04-10 | 1993-02-16 | Ashimori Industry Co., Ltd. | Lining material for pipe lines and a process for providing pipe lines therewith |
| US20020062546A1 (en) * | 2000-07-07 | 2002-05-30 | Obeshaw Dale Francis | Coated contoured crushable structural members and methods for making the same |
| US20080315466A1 (en) * | 2004-06-04 | 2008-12-25 | Cornerstone Research Group, Inc. | High Speed Manufacturing Using Shape Memory Polymer Composites |
| CN101495069A (en) * | 2006-07-07 | 2009-07-29 | 波士顿科学有限公司 | Endoprosthesis delivery system with stent holder |
| CN103398240A (en) * | 2013-06-09 | 2013-11-20 | 哈尔滨工业大学 | Shape memory polymer variable-stiffness tube and manufacturing method thereof |
| CN205951331U (en) * | 2016-08-08 | 2017-02-15 | 西安超码复合材料有限公司 | Resin transfer molding forming die |
| US10391684B1 (en) * | 2016-11-30 | 2019-08-27 | Spintech, LLC | Cauls and methods of using cauls to produce composite articles |
| CN111050835A (en) * | 2017-09-05 | 2020-04-21 | 苏黎世联邦理工学院 | Steerable catheter with sections of different stiffness |
| CN107599908A (en) * | 2017-10-12 | 2018-01-19 | 山东大学 | A kind of deformable safety seat of fibre reinforced and preparation method thereof |
| CN111936090A (en) * | 2018-04-09 | 2020-11-13 | 波士顿科学国际有限公司 | Support frame |
| CN109096699A (en) * | 2018-07-10 | 2018-12-28 | 哈尔滨工业大学 | A kind of electric drive shape memory polymer composite material and preparation method thereof |
| CN209800177U (en) * | 2018-10-12 | 2019-12-17 | 中国地质大学（武汉） | Carbon nano tube fiber composite shape memory alloy type driver |
| CN114599418A (en) * | 2019-06-15 | 2022-06-07 | 马杜罗探索有限责任公司 | Conduit structure |
| CN111575867A (en) * | 2020-05-26 | 2020-08-25 | 苏州海天运动器材有限公司 | Novel elastic net material for trampoline |
| CN113813090A (en) * | 2021-08-12 | 2021-12-21 | 广东富江医学科技有限公司 | Support and preparation method thereof |
| CN114801355A (en) * | 2022-04-11 | 2022-07-29 | 武汉纺织大学 | High-composite-strength multilayer heat insulation material and application thereof |
| CN217074258U (en) * | 2022-04-20 | 2022-07-29 | 广东工业大学 | Energy absorption box with nickel-titanium shape memory alloy braided structure interlayer |
Non-Patent Citations (3)
| Title |
|---|
| GUANG YANG ET AL.: "Toward high-performance multifunctional electronics: Knitted fabric-based composite with electrically conductive anisotropy and self-healing capacity", 《CHEMICAL ENGINEERING JOURNAL 》, no. 426 * |
| HAIPENG REN ET AL.: "Shape memory property and mechanism of the knitting-fabric reinforced epoxy composites subjected to tensile loading", vol. 230, no. 1, pages 1 - 3 * |
| 赵立环等: "形状记忆织物的发展及展望", 《纺织导报》, no. 02 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115654052B (en) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103145437B (en) | Resin isobaric liquid-phase impregnation densification method for rapidly filling pores inside carbon/carbon composite material | |
| EP2038105B1 (en) | Method and moulding core for producing a fibre composite component for aerospace | |
| JP4733145B2 (en) | Densification of fiber structure by resin transfer molding to produce thick parts of composite materials | |
| CN104097329B (en) | A kind of method in composite foam sandwich construction shaping, foamed material being carried out resin infusion pretreatment | |
| US20140374950A1 (en) | Process for the rapid fabrication of composite gas cylinders and related shapes | |
| US20090288592A1 (en) | Crucible holding member and method for producing the same | |
| US20090309268A1 (en) | Method for producing structures of complex shapes of composite materials | |
| JP5351037B2 (en) | Manufacturing method of composite parts | |
| CN105082567B (en) | The curing of big thickness fiber reinforced epoxy resin based composites | |
| CN102046348A (en) | Method for producing a part comprising a hollow body made from a composite material | |
| WO2014005397A1 (en) | Carbon fiber composite arm support, method for producing same and concrete pump car comprising same | |
| CN110077013A (en) | Continue the composite material and its method of fibre three-dimensional braiding manufacture using preimpregnation glue connection | |
| CN113427793B (en) | High-strength high-temperature-resistant composite material air inlet channel and forming method thereof | |
| JP2010510913A5 (en) | ||
| CN109808196A (en) | Fiber laminated composite material containing high-orientation-degree carbon nano tubes between layers and preparation method thereof | |
| CN109774199B (en) | Forming method of carbon fiber composite rudder-shaped structure | |
| CN115654052A (en) | Compression type tubular shape memory composite structure and manufacturing method thereof | |
| CN106863840B (en) | Based on can inflation/deflation/wick-containing axle sleeve braided fiber enhancing structure part manufacturing method | |
| CN218666892U (en) | Composite material structure capable of stretching and recovering continuous fibers to enhance shape memory | |
| JP2023011570A (en) | Method of preparing sandwich-like composite material | |
| CN106674906A (en) | Preparation method of high fiber volume content knitted composite | |
| CN203200178U (en) | Vacuum hotpressing tank with isobaric recovery device | |
| CN207224633U (en) | A kind of mould suitable for RTM shaping casing composite materials | |
| Ghasemi Nejhad et al. | Processing and performance of continuous fiber ceramic composites by preceramic polymer pyrolysis: II—resin transfer molding | |
| CN115045038B (en) | Preparation method of full-closed top woven piece and preparation method of composite material piece of full-closed top woven piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |