CN115363860A - High-water-absorption negative-pressure wound protection device - Google Patents
High-water-absorption negative-pressure wound protection device Download PDFInfo
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- CN115363860A CN115363860A CN202210814102.1A CN202210814102A CN115363860A CN 115363860 A CN115363860 A CN 115363860A CN 202210814102 A CN202210814102 A CN 202210814102A CN 115363860 A CN115363860 A CN 115363860A
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- negative pressure
- water absorption
- high water
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000741 silica gel Substances 0.000 claims abstract description 12
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 12
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 239000002313 adhesive film Substances 0.000 claims abstract description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical group O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000004132 cross linking Methods 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000004088 foaming agent Substances 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 229920005862 polyol Polymers 0.000 claims description 10
- 150000003077 polyols Chemical class 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 229920000877 Melamine resin Polymers 0.000 claims description 9
- 230000001413 cellular effect Effects 0.000 claims description 9
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000004970 Chain extender Substances 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 5
- 239000012948 isocyanate Substances 0.000 claims description 5
- 150000002513 isocyanates Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 5
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 5
- 235000011151 potassium sulphates Nutrition 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 239000008098 formaldehyde solution Substances 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 4
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 4
- 239000011736 potassium bicarbonate Substances 0.000 claims description 4
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 3
- 229940047670 sodium acrylate Drugs 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- -1 aliphatic aldehyde Chemical class 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000000499 gel Substances 0.000 abstract description 9
- 229920001296 polysiloxane Polymers 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001804 debridement Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920002529 medical grade silicone Polymers 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000037313 granulation tissue formation Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Images
Classifications
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- A61F13/05—
-
- A61F13/01017—
-
- A61F13/01029—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/26—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
- A61M1/91—Suction aspects of the dressing
Abstract
The invention discloses a high-water-absorption negative-pressure wound protection device which sequentially comprises a PU adhesive film layer, a high-water-absorption layer, a sponge layer and a silica gel layer from outside to inside towards a wound surface, wherein the silica gel layer covers the wound surface, and the PU adhesive film layer covers the high-water-absorption layer and skin around the wound surface. The advantages of the invention include: the silicone gel layer with the small holes is arranged to cover the wound surface, so that the wound protection device can be prevented from being adhered to the wound surface; the PU sponge layer has larger pores and good drainage effect, and is suitable for negative pressure operation; the high water absorption layer can ensure that the dirty harmful substances of the wound surface are quickly absorbed in a large quantity, and the sanitation and the proper humidity condition of the wound surface are kept.
Description
Technical Field
The invention relates to the technical field of wound surface nursing, in particular to a high-water-absorption wound protecting technology.
Background
The dressing is a common material for clinical wound protection, and can enable the wound surface to heal as soon as possible by combining negative pressure wound protection. The existing dressing products are many and have various characteristics. Such as breathability, absorbency, facilitating negative pressure debridement, etc. However, there are disadvantages such as adhesion to the wound surface, inability to achieve both air impermeability and water absorption, and the like. Therefore, the research and development of the wound protection device which is free from adhesion with the wound surface, has excellent air permeability and water absorption and is beneficial to negative pressure debridement has great application prospect.
Disclosure of Invention
The invention aims to provide a high-water-absorption negative-pressure wound protection device, which solves the problems that a wound protection material in the prior art cannot avoid adhesion with a wound surface, cannot give consideration to air permeability and water absorption performance, and is not beneficial to negative-pressure wound cleaning operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high water absorption negative pressure wound protection device,
the wound dressing sequentially comprises a PU adhesive film layer, a high water absorption layer, a sponge layer and a silica gel layer from outside to inside towards the wound surface, wherein the silica gel layer covers the wound surface, and the PU adhesive film layer covers the high water absorption layer and the skin around the wound surface.
Further, PU pad pasting layer surface is equipped with the sucking disc, sucking disc and super absorbent layer intercommunication, the sucking disc is connected with the drainage tube.
Furthermore, drainage tube one end is connected the sucking disc, and its other end is equipped with the drainage interface, the drainage interface connection is on the drainage suction opening of vacuum tester, the drainage interface is equipped with inner wall and outer wall, and the internal surface of outer wall is equipped with first screw thread, is the accommodation space of drainage suction opening between inner wall and the outer wall, and the drainage suction opening assembly is in the accommodation space, and the drainage suction opening outside is equipped with or is not equipped with the second screw thread that matches with first screw thread.
Further, the superabsorbent layer contains an SAP material.
Further, the preparation process of the SAP material comprises the following steps in parts by weight:
(1) Adding 2-5 parts of cross-linking agent N, N' -methylene bisacrylamide, 1-3 parts of initiator potassium sulfate and 300-800 parts of deionized water into 100-150 parts of solution of 1 or more than 2 of acrylic acid, sodium acrylate and vinyl alcohol for cross-linking reaction;
(2) Drying the product obtained in the step (1) to prepare particles;
(3) Carrying out surface modification on the particles in the step (2) by using an aluminum trichloride solution or a silicon dioxide solution;
(4) And (5) cleaning and drying.
Further, the crosslinking reaction temperature in the step (1) is 70-80 ℃, and the time is 45-90 min;
the temperature for carrying out surface modification in the step (3) is 60-75 ℃, and the time is 20-40min.
Further, the sponge layer is a PU sponge layer;
the preparation process of the PU sponge layer comprises the following steps:
(1) 25-40 parts of isocyanate and 30-40 parts of hydrophobic polyol, and stirring and mixing for 100-120min at 60-65 ℃;
(3) Stirring and mixing the product of the last step, 20-35 parts of hydrophilic polyether polyol, 0.2-1 part of catalyst, 2-5 parts of foaming agent, 5-6 parts of surfactant, 0.5-3 parts of chain extender and 5-6 parts of water at 80-85 ℃ for 1-2min;
(3) And pouring the product obtained in the last step into a mould for high-temperature treatment to obtain the PU sponge with three-dimensional intercommunicated cellular meshes and large pores.
Further, the step (3) of high-temperature treatment process is as follows: processing at 80-85 ℃ for 4h, processing at 90 ℃ for 0.5h, and processing at 70-75 ℃ for 3.5h.
Further, the catalyst is selected from hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, lactic acid, malic acid, citric acid;
the cross-linking agent is selected from formaldehyde solution, glutaraldehyde, aliphatic aldehyde, formaldehyde and melamine mixture;
in the formaldehyde and melamine mixture, the molar ratio of formaldehyde: melamine =3:1;
the foaming agent is selected from sodium bicarbonate and potassium bicarbonate.
Furthermore, the silicon gel layer is medical-grade silicon gel, and small holes are distributed on the silicon gel layer.
The advantages of the invention include: the silicone gel layer with the distributed small holes covers the wound surface, so that the wound protection device can be prevented from being adhered to the wound surface; the PU sponge layer has larger pores and good drainage effect, and is suitable for negative pressure operation; the high water absorption layer can ensure that the dirty harmful substances of the wound surface are quickly absorbed in a large quantity, and the sanitation and the proper humidity condition of the wound surface are kept.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a schematic side view of the structure of the present invention;
FIG. 2 is a schematic view of a silicone gel layer structure;
fig. 3 is a schematic view of the drainage interface structure.
PU pad pasting layer 1, high water absorption layer 2, sponge layer 3, silica gel layer 4, aperture 41, sucking disc 5, drainage tube 6, inner wall 61, outer wall 62.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Example 1
As shown in figure 1, the high-water-absorption negative-pressure wound protection device sequentially comprises a PU adhesive film layer 1, a high-water-absorption layer 2, a sponge layer 3 and a silica gel layer 4 from outside to inside towards a wound surface, wherein the silica gel layer 4 covers the wound surface, and the PU adhesive film layer 1 covers the high-water-absorption layer 2 and skin around the wound surface.
The outer surface of the PU film layer 1 is provided with a sucker 5, the sucker 5 is communicated with the high water absorption layer 2, and the sucker 5 is connected with a drainage tube 6. The drainage tube 6 is connected to a negative pressure instrument.
One end of the drainage tube 6 is connected with the sucker 5, the other end of the drainage tube is provided with a drainage interface, the drainage interface is connected to a drainage suction port of the negative pressure instrument, as shown in fig. 3, the drainage interface is provided with an inner wall 61 and an outer wall 62, the inner surface of the outer wall is provided with a first thread, an accommodating space of the drainage interface is arranged between the inner wall 61 and the outer wall 62, the drainage suction port is assembled in the accommodating space, and the outer side of the drainage suction port is provided with or not provided with a second thread matched with the first thread.
The super absorbent layer 2 contains SAP material, and the thickness and the content of SAP material can be adjusted during production to control the absorptivity of the super absorbent layer, so that the super absorbent layers 2 with different specifications can be produced, and different wound protection requirements can be met.
The preparation process of the SAP material comprises the following steps of:
(1) Adding 5 parts of cross-linking agent N, N' -methylene bisacrylamide, 2 parts of initiator potassium sulfate and 300 parts of deionized water into 100 parts of solution of acrylic acid and sodium acrylate to carry out cross-linking reaction;
(2) Drying the product obtained in the step (1) to prepare particles;
(3) Carrying out surface modification on the particles in the step (2) by using an aluminum trichloride solution;
(4) And (5) cleaning and drying.
The crosslinking reaction temperature in the step (1) is 80 ℃, and the time is 90min;
the temperature for carrying out surface modification in the step (3) is 75 ℃ and the time is 40min.
The sponge layer is a PU sponge layer;
the preparation process of the PU sponge layer comprises the following steps:
(1) 40 parts of isocyanate and 35 parts of hydrophobic polyol are stirred and mixed for 120min at the temperature of 60-65 ℃;
(2) Stirring and mixing the product of the last step, 35 parts of hydrophilic polyether polyol, 0.2 part of catalyst, 2 parts of foaming agent, 6 parts of surfactant, 3 parts of chain extender and 5 parts of water at 85 ℃ for 2min;
(3) And pouring the product obtained in the previous step into a mould for high-temperature treatment to obtain the PU sponge with cellular meshes and large pores, wherein the cellular meshes and large pores are in a three-dimensional intercommunicated structure.
The high-temperature treatment process in the step (3) comprises the following steps: the treatment at 85 ℃ is carried out for 4h, the treatment at 90 ℃ is carried out for 0.5h, and the treatment at 75 ℃ is carried out for 3.5h.
The catalyst is selected from hydrochloric acid;
the cross-linking agent is selected from formaldehyde solution;
the foaming agent is selected from sodium bicarbonate.
As shown in FIG. 2, the silicone gel layer 4 is a medical grade silicone gel with small holes 41 distributed therein.
When the drainage tube is used, the release paper of the silicone gel layer 4 is torn off and then covers the wound surface, the PU sponge layer and the super absorbent layer 2 containing SAP materials are covered, the back lining layer on the PU adhesive film 1 is torn off and then covers the super absorbent layer 2 and the skin around the wound surface, if negative pressure debridement is needed, a sucker can be fixed on the outer surface of the PU adhesive film layer 1, the inner wall 61 of the drainage port of the drainage tube 6 is inserted into the drainage suction port, the first thread and the second thread are matched, the drainage tube 6 is connected to a negative pressure instrument and other systems, the negative pressure debridement treatment can be drawn together to reduce the wound area, infectious substances are eliminated, edema is relieved, blood circulation is promoted, cell stretching is promoted, granulation tissue formation is promoted, and the like.
Example 2
Different from the example 1, the preparation process of the SAP material comprises the following steps of:
(1) Adding 5 parts of cross-linking agent N, N' -methylene bisacrylamide, 3 parts of initiator potassium sulfate and 600 parts of deionized water into 120 parts of solution of acrylic acid and vinyl alcohol to carry out cross-linking reaction;
(2) Drying the product of the step (1) to prepare particles;
(3) Carrying out surface modification on the particles in the step (2) by using an aluminum trichloride solution or a silicon dioxide solution;
(4) And (5) cleaning and drying.
The crosslinking reaction temperature in the step (1) is 80 ℃, and the time is 60min;
the temperature for carrying out surface modification in the step (3) is 60 ℃ and the time is 40min.
The sponge layer is a PU sponge layer;
the preparation process of the PU sponge layer comprises the following steps:
(1) Stirring and mixing 30 parts of isocyanate and 40 parts of hydrophobic polyol at 65 ℃ for 120min;
(2) Stirring and mixing the product of the last step, 35 parts of hydrophilic polyether polyol, 0.2 part of catalyst, 5 parts of foaming agent, 5 parts of surfactant, 0.5 part of chain extender and 5 parts of water for 1min at 80 ℃;
(3) And pouring the product obtained in the previous step into a mould for high-temperature treatment to obtain the PU sponge with cellular meshes and large pores, wherein the cellular meshes and large pores are in a three-dimensional intercommunicated structure.
The high-temperature treatment process in the step (3) comprises the following steps: the treatment at 85 ℃ is carried out for 4h, the treatment at 90 ℃ is carried out for 0.5h, and the treatment at 75 ℃ is carried out for 3.5h.
The catalyst is selected from sulfuric acid;
the cross-linking agent is selected from formaldehyde solution;
the foaming agent is selected from potassium bicarbonate.
Example 3
Different from the example 2, the preparation process of the SAP material comprises the following steps of:
(1) Adding 5 parts of cross-linking agent N, N' -methylene bisacrylamide, 3 parts of initiator potassium sulfate and 600 parts of deionized water into 150 parts of vinyl alcohol solution to carry out cross-linking reaction;
(2) Drying the product of the step (1) to prepare particles;
(3) Carrying out surface modification on the particles in the step (2) by using a silicon dioxide solution;
(4) And (5) cleaning and drying.
The crosslinking reaction temperature in the step (1) is 70 ℃, and the time is 50min;
the temperature for carrying out surface modification in the step (3) is 75 ℃ and the time is 20min.
The sponge layer is a PU sponge layer;
the preparation process of the PU sponge layer comprises the following steps:
(1) 40 parts of isocyanate and 30 parts of hydrophobic polyol are stirred and mixed for 120min at 60 ℃;
(2) Stirring and mixing the product of the last step, 35 parts of hydrophilic polyether polyol, 1 part of catalyst, 5 parts of foaming agent, 6 parts of surfactant, 3 parts of chain extender and 6 parts of water at 85 ℃ for 2min;
(3) And pouring the product obtained in the previous step into a mould for high-temperature treatment to obtain the PU sponge with cellular meshes and large pores, wherein the cellular meshes and large pores are in a three-dimensional intercommunicated structure.
The high-temperature treatment process in the step (3) comprises the following steps: the treatment at 85 ℃ is carried out for 4h, the treatment at 90 ℃ is carried out for 0.5h, and the treatment at 70 ℃ is carried out for 3.5h.
The catalyst is selected from hydrochloric acid;
the cross-linking agent is selected from a mixture of formaldehyde and melamine;
in the formaldehyde and melamine mixture, the molar ratio of formaldehyde: melamine =3:1;
the foaming agent is selected from potassium bicarbonate.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a high water absorption negative pressure protects and creates device which characterized in that:
the wound dressing sequentially comprises a PU adhesive film layer, a high water absorption layer, a sponge layer and a silica gel layer from outside to inside towards the wound surface, wherein the silica gel layer covers the wound surface, and the PU adhesive film layer covers the high water absorption layer and the skin around the wound surface.
2. The high water absorption negative pressure wound protection device of claim 1, wherein:
PU pad pasting layer surface is equipped with the sucking disc, sucking disc and super absorbent layer intercommunication, the sucking disc is connected with the drainage tube.
3. The high water absorption negative pressure wound protection device of claim 2, wherein:
one end of the drainage tube is connected with the sucker, the other end of the drainage tube is provided with a drainage interface, the drainage interface is connected to a drainage suction port of the negative pressure instrument, the drainage interface is provided with an inner wall and an outer wall, a first thread is arranged on the inner surface of the outer wall, an accommodating space of the drainage suction port is arranged between the inner wall and the outer wall, the drainage suction port is assembled in the accommodating space, and a second thread matched with the first thread is arranged or not arranged on the outer side of the drainage suction port.
4. The high water absorption negative pressure wound protecting device of claim 1, wherein:
the superabsorbent layer contains an SAP material.
5. The high water absorption negative pressure wound protection device of claim 4, wherein:
the preparation process of the SAP material comprises the following steps of:
(1) Adding 2-5 parts of cross-linking agent N, N' -methylene bisacrylamide, 1-3 parts of initiator potassium sulfate and 300-800 parts of deionized water into 100-150 parts of solution of 1 or more than 2 of acrylic acid, sodium acrylate and vinyl alcohol for cross-linking reaction;
(2) Drying the product obtained in the step (1) to prepare particles;
(3) Carrying out surface modification on the particles in the step (2) by using an aluminum trichloride solution or a silicon dioxide solution;
(4) And (5) cleaning and drying.
6. The high water absorption negative pressure wound protection device of claim 5, wherein:
the crosslinking reaction temperature in the step (1) is 70-80 ℃, and the time is 45-90 min;
the temperature for carrying out surface modification in the step (3) is 60-75 ℃, and the time is 20-40min.
7. The high water absorption negative pressure wound protecting device of claim 1, wherein:
the sponge layer is a PU sponge layer;
the preparation process of the PU sponge layer comprises the following steps:
(1) 25-40 parts of isocyanate and 30-40 parts of hydrophobic polyol, and stirring and mixing for 100-120min at 60-65 ℃;
(2) Stirring and mixing the product of the last step, 20-35 parts of hydrophilic polyether polyol, 0.2-1 part of catalyst, 2-5 parts of foaming agent, 5-6 parts of surfactant, 0.5-3 parts of chain extender and 5-6 parts of water at 80-85 ℃ for 1-2min;
(3) And pouring the product obtained in the previous step into a mould for high-temperature treatment to obtain the PU sponge with cellular meshes and large pores, wherein the cellular meshes and large pores are in a three-dimensional intercommunicated structure.
8. The high water absorption negative pressure wound protecting device of claim 7, wherein:
the high-temperature treatment process in the step (3) comprises the following steps: processing at 80-85 ℃ for 4h, processing at 90 ℃ for 0.5h, and processing at 70-75 ℃ for 3.5h.
9. The high water absorption negative pressure wound protection device of claim 7, wherein:
the catalyst is selected from hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, lactic acid, malic acid and citric acid;
the cross-linking agent is selected from formaldehyde solution, glutaraldehyde, aliphatic aldehyde, formaldehyde and melamine mixture;
in the formaldehyde and melamine mixture, the molar ratio of formaldehyde: melamine =3:1;
the foaming agent is selected from sodium bicarbonate and potassium bicarbonate.
10. The high water absorption negative pressure wound protecting device of claim 1, wherein:
the silica gel layer is medical grade silica gel, and small holes are distributed on the silica gel layer.
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| CN202210814102.1A CN115363860A (en) | 2022-07-11 | 2022-07-11 | High-water-absorption negative-pressure wound protection device |
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| CN202210814102.1A CN115363860A (en) | 2022-07-11 | 2022-07-11 | High-water-absorption negative-pressure wound protection device |
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