EP3652108A1 - Hydroxylapatit/gelatine-komposit-material und dessen verwendung, insbesondere als künstliches elfenbein, sowie verfahren zu dessen herstellung - Google Patents
Hydroxylapatit/gelatine-komposit-material und dessen verwendung, insbesondere als künstliches elfenbein, sowie verfahren zu dessen herstellungInfo
- Publication number
- EP3652108A1 EP3652108A1 EP18739499.4A EP18739499A EP3652108A1 EP 3652108 A1 EP3652108 A1 EP 3652108A1 EP 18739499 A EP18739499 A EP 18739499A EP 3652108 A1 EP3652108 A1 EP 3652108A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gelatin
- composite material
- hydroxyapatite
- product obtained
- range
- 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.)
- Withdrawn
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/005—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/215—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase at least one additive being also premixed with a liquid phase
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/14—Chemical modification with acids, their salts or anhydrides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
- C08L89/04—Products derived from waste materials, e.g. horn, hoof or hair
- C08L89/06—Products derived from waste materials, e.g. horn, hoof or hair derived from leather or skin, e.g. gelatin
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/12—Keyboards; Keys
- G10C3/125—Materials or treatment of materials for the manufacturing of keys
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00836—Uses not provided for elsewhere in C04B2111/00 for medical or dental applications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
- C08J2389/04—Products derived from waste materials, e.g. horn, hoof or hair
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/325—Calcium, strontium or barium phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
Definitions
- the main component of the ivory is dentin: a mineralized tissue consisting of an organic matrix and an inorganic mineral.
- the dentin consists of 60-70% carbonate hydroxylapatite (mineral), 20% collagen (matrix) and 10-20% water.
- hydroxylapatite mineral
- collagen matrix
- a special structure forms between the collagen fibrils and the hydroxyapatite crystals.
- the dentin is still permeated with microchannels (tubules).
- the structural design of dentin has been extensively studied and elucidated (V.Jantou-Morris, M.A. Horton, D.W. McComb, Biomaterials 31 (2010), 5275-5286). Further, the nucleation and growth of dentin or analogous composite materials has been studied (Y. Wang, T.
- the main source of ivory are the tusks of elephants.
- those of mammals such as mammoth, walrus, sperm whale, narwhal or hippo play only a minor role.
- the ivory finds use, inter alia, as a starting material for the production of works of art and as a covering for the white keys of keyboard instruments.
- material properties such as the color (ivory) and the slight machining of the ivory crucial. Due to species protection, the international ivory trade has been banned since 1989 (CITES agreement). Nevertheless, elephants are killed every day by poaching because of their tusks and the ivory comes so illegal in the trade. Due to this situation, a search has already been made for suitable replacement materials, in particular for the instrument keys.
- the organic polymers do not meet the technical requirements (surface quality, moisture absorption, thermal conductivity) of the instrument keys made of ivory.
- pore size and thermal conductivity can be adjusted to a certain extent, but they are heavier and do not show the desired moisture absorption.
- the synthetic approach of the invention makes use of components of the natural ivory. Hydroxylapatite (Cas [P0 4 ] 30H) and gelatin are reacted directly in a solvent and concentrated with stirring. Gelatine is the product of the thermal hydrolysis of collagen and thus very similar to collagen, but chemically easier to implement. In this synthesis, a swellable gelatin matrix is formed which is stabilized by hydroxyapatite and whose properties can be adjusted.
- the production method according to the invention according to claim 1 comprises at least the following steps:
- step c) stirring the mixture at a predetermined temperature for a given period of time, typically in the range of 10 minutes to 24 hours (preferably 1 to 10 hours), until partial or complete evaporation of the liquid medium; d) optionally drying the product obtained in step c).
- the (polar) liquid medium is not water, but a water-miscible dispersing agent, preferably a Ci-Cio-alcohol, especially ethanol, or a mixture of such a dispersant with water. In a particularly preferred embodiment, this is an azeotropic mixture.
- the aqueous solution of gelatin added in step b) preferably contains a gelatin concentration of 1 to 40%, more preferably 5 to 25%, most preferably about 15%.
- the gelatin used according to the invention is in principle not particularly limited in its selection.
- the gelatin has a high bloom number, typically in a range of from 50 to 350, preferably from 200 to 350, and a viscosity typically in a range of from 1 to 500, preferably from 10 to 150 mps, and a pH which is typically in the range of 3 to 9, preferably 4 to 7.
- step b a heated gelatin solution (typically in a temperature range of 40 to 70 ° C) is added to a heated hydroxyapatite suspension (typically in a temperature range of 40 to 70 ° C).
- the reaction mixture is stirred in step c) typically for a period of 10 minutes to 24 hours, preferably 2 to 10 hours, at a temperature of 40 to 200 ° C, preferably from 50 to 60 ° C.
- step c) is carried out at a temperature below the boiling point of the aqueous / organic liquid medium obtained after step b) (optionally also below the boiling point of an azeotropic mixture).
- the drying in step d) is influenced not only by the amount of material but also by temperature, water vapor content and ambient pressure. It was preferably in air (1 bar), 25 ° C and about 45% rel. Humidity carried out. A vacuum drying is also possible.
- the drying in step d) can be carried out completely (no further weight loss under standard conditions (1 bar, 25 ° C., 45% relative atmospheric humidity) or only partially.)
- a partial drying can be advantageous, for example, if the product is treated further, eg infiltrated, shall be.
- Calcium phosphate / gelatin composite material syntheses from solution are described in the literature (eg T. Kollmann, P. Simon, W. Carrillo-Cabrera, C. Braunbarth, T. Poth, EV Rosseeva, R. Kniep, Chem. Mater. 22 (2010 ), 5137-5153, M. Chul Chang, WH Douglas, J. Tanaka, J. Mater, Sei .: Mater, Med., 17 (2006), 387-396).
- the known composite materials are usually intended as bone replacement materials.
- the extracellular matrix of the bones and natural ivory-like main components namely hydroxyapatite and collagen, have their structural structure and thus also significant physical properties differ significantly from each other.
- the spatial arrangement of the extracellular matrix is adapted to the particular functionality of the bones and it is also able to embed the functional bone cells.
- An artificial material with this structure or these properties is usually anisotropic and hardly or not at all suitable for commercial use as an ivory replacement material.
- the calcium phosphate component is prepared in situ.
- a Ca solution is reacted with a phosphate solution to mineralize the gelatin.
- directly powdered hydroxyapatite is used.
- the use of powdered hydroxyapatite in addition to the simpler implementation has the advantages that no side reactions to other calcium occur, the components are relatively variable and interchangeable, and additional components are easily involved.
- layered hydroxyapatite is used (explicitly prepared) to produce a laminar structure (bone substitute material).
- the approach according to the invention aims in the opposite direction.
- a random arrangement of the components in the product is deliberately created.
- the aim of the synthesis is to produce a uniform composite material with suitable strength, which has isotropic properties and whose swellability is adjustable. This can generally be achieved by the method according to the invention.
- the consideration of the following aspects is particularly important for the synthesis.
- the properties can be influenced by the component ratio; on the other hand, the use of gelatin with a high bloom number (corresponding to high mechanical strength in the gel) and of highly concentrated gelatin solutions increases the strength of the product.
- azeotropic mixtures for example, a mixture of water (4.4%) and ethanol (95.6%) boils azeotropically at 78.1 ° C. Therefore, if, for example, hydroxyapatite suspended in ethanol instead of water is reacted with the gelatin solution, the concentration of the suspension can be carried out at a lower temperature and faster. Furthermore, the gelatin is not further diluted (insoluble in ethanol) but the water content is successively reduced. Low water content, high Bloom number and rapid reaction at low temperature get longer gelatin molecule chains and thus lead to a more stable product. The hydroxyapatite crystals are incorporated without preferential direction in the gelatin matrix, resulting in isotropic product properties.
- the product synthesized by the method of claim 1 shows increased water uptake compared to natural ivory. This is undesirable for some applications.
- thermal treatment the swelling capability can be reduced, but at the same time also the decomposition of the gelatin matrix, which at a temperature> 150 ° C already leads to a browning in the product.
- Preferred embodiments of the synthesis process according to the invention therefore comprise a further process step with which the water absorption of the product is reduced or already taken up water is removed again.
- an aliphatic polyether preferably a polyethylene glycol (PEG).
- PEG HO (CH 2 CH 2 O) n -H
- PEG HO (CH 2 CH 2 O) n -H
- the crude product according to the invention can easily be infiltrated with PEG / water mixtures or PEG.
- the material initially stores water, which is then exchanged for PEG and thus leads to a durable durable impregnated product.
- the water absorption can also be adjusted by means of different molecular weights of the PEG polymers used.
- the aliphatic polyether used in particular PEG, has a molecular weight in the range from 100 to 10,000,000 g / mol, preferably from 400 to 4000 g / mol.
- the infiltration treatment according to the invention comprises at least one of the following steps:
- step c) or d) of claim 1 Contacting the product obtained in step c) or d) of claim 1 with a medium containing a mixture of polyether / water for a predetermined period of time, preferably in a range of 1 hour to 1 week, and optionally subsequent drying ; or Contacting the product obtained in step c) or d) of claim 1 with an anhydrous medium comprising or consisting of an aliphatic polyether for a given period of time, preferably in the range of 1 hour to several weeks.
- a special process variant is characterized in that the contacting with the polyether is carried out at reduced pressure or under vacuum.
- the concrete process conditions are not particularly critical and can be easily optimized by the expert in routine experiments. For example, the contacting at a pressure of 10-500 mbar or 20-200 mbar for a period of 1 to 48 h, preferably 1-24 h, take place.
- step c) or d) of claim 1 contacting the product obtained in step c) or d) of claim 1 with a medium containing a mixture of polyether / water for a predetermined period of time, preferably in a range of 1 hour to 1 week, and
- step elb then exchanging the medium through an anhydrous medium comprising or consisting of an aliphatic polyether, and contacting the product obtained after step ela) with the anhydrous polyether for a predetermined period, preferably in the range of 1 hour to several weeks.
- the color of the product also changes from white to ivory, with the intensity of the color depending on the material used and the duration.
- This treatment thus makes the artificial ivory according to the invention particularly advantageous as a piano key pad.
- a further possibility for the aftertreatment of the crude product obtained according to the invention is the contacting with at least one means for crosslinking the gelatin chains (hardening). Also in this way the water absorption can be reduced.
- This at least one crosslinking agent is preferably selected from the group comprising complex-forming metal salts, aldehydes, ketones, epoxides, isocyanates, carbodiimide and enzymes, and is more preferably a complex-forming metal salt.
- the complex-forming metal salt is not particularly limited in principle. Preferably, however, it is selected from the group comprising salts of aluminum, chromium, iron, titanium, zirconium, molybdenum, and in particular alums, eg, potassium alum, chrome alum.
- the acid groups of the amino acids in the gelatin chains can be crosslinked by metal complex formation and thus the swelling capacity and water absorption can be reduced or regulated.
- the crosslinking can also be combined with an infiltration treatment as described above.
- a specific embodiment of the method according to the invention is characterized in that the product obtained in a step c), d) or el) as described above is further contacted in step e2) with at least one means for crosslinking the gelatin chains.
- the product obtained in step c), d) or el) is contacted with the crosslinking agent, preferably a solution of a complexing metal salt, for a predetermined period of time, preferably from 1 hour to 1 week, and subsequently, optionally after removal of the crosslinking agent, eg the metal salt solution, and washing, the product dried.
- the crosslinking agent preferably a solution of a complexing metal salt
- a further specific embodiment of the process according to the invention is characterized in that only a partial region of the product obtained in step c), d) or el) is contacted with the crosslinking agent and crosslinking of the gelatin matrix takes place only in this partial region. This can be achieved, for example, by making a surface contact by repeated application of the crosslinking agent, for example a brush or cloth, on the surface of the composite material.
- Another specific embodiment of the method according to the invention is characterized in that the crude product according to the invention is infiltrated in one step and contacted with the crosslinking agent. Steps el) and e2) take place simultaneously in this variant.
- the product is treated with a PEG / aqueous (preferably about 1%) potassium alum solution.
- Another aspect of the present invention relates to the products obtainable by the process of the invention, i. isotropic hydroxyapatite / gelatin composite materials.
- a white, solid product which is resistant to fracture, moisture-absorbing, machinable, temperature-resistant and, under certain conditions, also flexible, initially forms.
- this product is very close to the natural product and, in addition, there is the possibility of varying the synthesis route, e.g. by incorporation or chemical reactions to optimize desired material properties.
- an aliphatic polyether can be incorporated into the material and / or crosslinking of the gelatin chains can be carried out.
- the incorporation of the polyether and / or the treatment with suitable crosslinking agents lead inter alia to the formation of an ivory-colored product.
- the incorporation of the polyether and / or the treatment with suitable crosslinking agents also improves the feel of the product. As already mentioned, this is very important for certain applications, in particular for piano keys, and the products according to the invention offer in this respect a clear advantage over conventional ivory replacement products for producing synthetic key pads.
- the isotropic hydroxylapatite / gelatin composite material according to the invention is therefore characterized in that it contains an aliphatic polyether, in particular PEG, embedded in the hydroxylapatite / gelatin matrix, and / or crosslinked gelatin chains, in particular metal complexes crosslinked via metal complexes. groups of amino acids in the gelatin chains.
- the material according to the invention may also be present only in a partial area, e.g. surface, crosslinked or otherwise modified.
- the optionally incorporated aliphatic polyether, especially the PEG typically has a molecular weight in the range of 100 to 10,000,000 g / mol, preferably from 400 to 4000 g / mol.
- the composite material according to the invention may further comprise one or more additives, in particular pigments, dyes and phosphors, materials for marking materials, salts, metal particles, polymers, for example polyethylene glycol, and derivatives thereof (such as UV-curable), glasses, fibers (Cellulose, polypropylene, carbon, hollow glass fiber, ZnO nanofibers, hemp fibers) or antimicrobial components, eg Ti0 2 , Ag nanoparticles.
- additives in particular pigments, dyes and phosphors, materials for marking materials, salts, metal particles, polymers, for example polyethylene glycol, and derivatives thereof (such as UV-curable), glasses, fibers (Cellulose, polypropylene, carbon, hollow glass fiber, ZnO nanofibers, hemp fibers) or antimicrobial components, eg Ti0 2 , Ag nanoparticles.
- the isotropic hydroxyapatite / gelatin composite material of the present invention is characterized by randomly incorporating into the amorphous gelatin matrix hydroxylapatite particles having dimensions in the nanometer range, typically in the range of about 5 to 1000 nm, preferably 10 to 900 nm, more preferably 10 to 500 nm, for example 10 to 100 nm or 50 to 500 nm.
- the isotropic hydroxyapatite / gelatin composite material according to the invention is characterized in that it randomly contains hydroxylapatite needles embedded in an amorphous gelatin matrix with dimensions in the nanometer range, typically about 10 ⁇ 50 nm.
- the composite material according to the invention has the following composition: 50 to 100 wt .-% hydroxyapatite / gelatin matrix having a hydroxylapatite / gelatin ratio of 1: 1 to 10: 1, preferably 2: 1 to 4: 1, in particular about 3: 1, 0 to 30 wt .-%, preferably 1 to 10 wt .-%, of residual liquid medium, and
- polyethers optionally from 0.5 to 50% by weight, preferably from 1 to 25% by weight, of polyethers.
- the composite material according to the invention offers a multiplicity of possible uses, in particular as artificial ivory, but also in other fields.
- a black pigment by incorporating a black pigment, it is also possible for the first time to produce black key linings, which likewise possess the advantageous properties of ivory.
- buttons made from dark woods such as ebony or plastic buttons were used. Therefore, another aspect of the invention relates to preferred uses of this material, for example for the production of keyboards for keyboards in general, handles / grips, e.g.
- the embedding of fibers offers the possibility of optimizing properties such as porosity, surface roughness, stability.
- certain fibers can be removed from the material with a suitable solvent again.
- FIG. Fig. 1 shows photographs of an isotropic composite material according to the invention
- Fig. 1A shows the hydroxyapatite / gelatin composite raw material after drying in air
- Fig. 1B shows the material after cutting, grinding and PEG infiltration.
- FIG. Figure 2 shows an SEM image of the material surface with apatite crystals in the gelatin matrix.
- FIG. Figure 3 shows TEM images of the composite material at various scales;
- Figures 3A and 3B show embedded hydroxyapatite needles (typical dimension about 10 x 50 nm);
- Figure 3C shows embedded non-acicular hydroxyapatite particles (of sizes up to 1000 nm).
- FIG. Figure 4 shows IR spectra of the raw material (1) treated with PEG-400 / water (2) and PEG / potassium alum, respectively (3).
- FIG. Figure 5 shows X-ray powder diffractograms of the raw material (1) treated with PEG-400 / water (2) and PEG / potassium alum, respectively (3).
- FIG. 6 shows the Raman data of a comparison of natural ivory (1) and the composite material (2) according to the invention.
- the following examples are intended to illustrate the invention without, however, limiting it to the particular specific parameters and conditions.
- Fig. 1A shows the hydroxylapatite / gelatin composite raw material obtained as above after drying in air.
- the product was further dried first in air (5 days between perforated plates) and then for 24 hours at 100 ° C in an oven.
- the material obtained is mechanically workable.
- the white product was first infiltrated with a mixture (1: 1) of PEG-4OO / H2O for 2 days and then with pure PEG-400 for 6 days.
- the ivory colored material thus obtained was then appropriately cut and ground.
- Fig. 1B shows the material after cutting, grinding and PEG infiltration.
- a crosslinking agent eg, cut / ground hydroxyapatite / gelatin composite, a 1: 1 mixture consisting of PEG-400 and 1% aqueous potassium alum solution, was added to a 1% aqueous solution Glyoxalains, or a 1: 1 mixture consisting of PEG-400 and 1% aqueous glyoxal solution for 2 days and then dried in air.
- a aqueous potassium alum solution eg, cut / ground
- a 1 mixture consisting of PEG-400 and 1% aqueous potassium alum solution was added to a 1% aqueous solution Glyoxalains, or a 1: 1 mixture consisting of PEG-400 and 1% aqueous glyoxal solution for 2 days and then dried in air.
- the process steps for crosslinking are independent of the production of raw materials or already carried out infiltration and can be freely combined.
- the respective composite material was prepared analogously to Example 1 or 2.
- the suspension of hydroxylapatite either 0.3 g of solid FeCl 2 , 0.1 g of dioxazine violet (Pigment violet 37, C 40 H 34 N 6 O 8), 0.4 g of phthalocyanine green (Heliogen green PG 7, CuC 3 2 Cl -6 nH n N8 ), 1 g of HAN blue (BaCuSi 4 Oi 0 ), or 0.5 g of nano-Ag (20-40 nm).
- Hydroxylapatite / gelatin composite material obtained according to Example 1, 2 or 3 was further characterized by various microscopic and spectroscopic examination methods.
- FIG. Figure 2 shows an SEM image of the material surface of the raw material: visible are the apatite crystals in the gelatin matrix.
- the high-resolution transmission electron micrographs were taken on an ultrasonically thinned sample of the composite material by a JEOL device ARM200F at 200 kV (JEOL Co., Ltd.) equipped with a cold field emission gun and CETOR image correction (CEOS Co, Ltd.) under high vacuum.
- the length scale is shown in the pictures.
- FIG. 3 shows TEM images with parts of the raw material in different magnifications: Apatite crystals are visible isotropically embedded in amorphous gelatin matrix.
- FIGS. 3A and 3B Figure 3B shows embedded hydroxyapatite needles (typical dimension about 10 x 50 nm) and Figure 3C shows non-acicular hydroxyapatite particles of sizes up to 1000 nm.
- IR Infrared Spectroscopy
- the IR spectra were performed on a flat sample of the composite material using a Perkin Elmer BX II FT-IR spectrometer from Perkin Elmer (USA) equipped with an ATR unit (Smith Detection Dura-Sample NR diamond ).
- the transmission spectra in the range of the wave number from 400 to 4000 cm 1 have a resolution of 1 cm 1 and their intensities were scaled.
- FIG. Figure 4 shows IR spectra of the raw material (1) treated with PEG-400 / water (2) and PEG / potassium alum, respectively (3). Visible in all cases are the bands of the raw material as well as the bands of the correspondingly infiltrated components. D. X-ray powder diffractometry
- the X-ray powder diffractograms were recorded on a flat sample of the composite material with a Bragg-Brentano geometry diffractometer (Cu- ⁇ radiation) in reflection with a PIXcel 3D detector from PANalytical (Netherlands). The diffractograms were measured in the diffraction angle range of 10 to 90 ° in 2-theta and their intensities were scaled.
- FIG. Figure 5 shows X-ray powder diffractograms of the raw material (1) treated with PEG-400 / water (2) and PEG / potassium alum, respectively (3). Visible in all cases are the reflexes of the hydroxyapatite and additionally for sample 3 those of potassium alum.
- the Raman spectra were recorded using a laser microscope Raman spectrometer (IHR 550 spectrometer, BXFM microscopes) from HORIBA (Germany) with confocal geometry.
- the laser beam (wavelength 532 nm, power: 10 mW) was focused on air using a lens (100x) on a flat sample.
- FIG. 6 shows the corresponding Raman data: lower curve: natural ivory (1), upper curve raw material hydroxyapatite / gelatin composite (2).
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017115672.0A DE102017115672B4 (de) | 2017-07-12 | 2017-07-12 | Isotropes Hydroxylapatit/Gelatine-Kompositmaterial, Verfahren zu dessen Herstellung und dessen Verwendung |
| PCT/EP2018/068208 WO2019011771A1 (de) | 2017-07-12 | 2018-07-05 | Hydroxylapatit/gelatine-komposit-material und dessen verwendung, insbesondere als künstliches elfenbein, sowie verfahren zu dessen herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3652108A1 true EP3652108A1 (de) | 2020-05-20 |
Family
ID=62873328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18739499.4A Withdrawn EP3652108A1 (de) | 2017-07-12 | 2018-07-05 | Hydroxylapatit/gelatine-komposit-material und dessen verwendung, insbesondere als künstliches elfenbein, sowie verfahren zu dessen herstellung |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20210087400A1 (de) |
| EP (1) | EP3652108A1 (de) |
| JP (1) | JP2020528469A (de) |
| KR (1) | KR102419601B1 (de) |
| CN (1) | CN110891899A (de) |
| BR (1) | BR112020000678A2 (de) |
| DE (1) | DE102017115672B4 (de) |
| WO (1) | WO2019011771A1 (de) |
| ZA (1) | ZA202000183B (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4159916A4 (de) * | 2020-05-25 | 2023-09-06 | FUJIFILM Corporation | Zusammensetzung, blattförmiger formkörper, kunstleder und verfahren zur herstellung eines blattförmigen formkörpers |
| CN113633829B (zh) * | 2021-07-12 | 2022-10-14 | 深圳大学 | 一种多功能复合多孔支架及其制备方法与应用 |
| CN115159929B (zh) * | 2022-07-29 | 2023-11-03 | 山东建筑大学 | 超高性能混凝土的制备方法 |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3767437A (en) * | 1971-10-20 | 1973-10-23 | Avicon Inc | Phosthetic structures derived from collagen |
| DE3134541A1 (de) | 1980-09-02 | 1982-07-08 | Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka | "elfenbeinartiger werkstoff fuer musikinstrumenttasten und verfahren zur herstellung desselben" |
| US4346639A (en) | 1981-07-27 | 1982-08-31 | Ernest Vagias | Thermoplastic key face for pianos or the like |
| JPH0631943B2 (ja) | 1988-11-29 | 1994-04-27 | ヤマハ株式会社 | 楽器用鍵盤材 |
| US5183955A (en) | 1990-05-18 | 1993-02-02 | Renselaer Polytechnic Institute | Piano key covers formed of ivory substitute and pianos having same |
| DK0494417T3 (da) * | 1991-01-10 | 1996-05-13 | Basf Corp | Fremgangsmåde til tværbinding af gelatine og til inkorporering af et materiale deri |
| JPH04265260A (ja) * | 1991-02-18 | 1992-09-21 | Kanebo Ltd | 人工象牙 |
| JPH05271431A (ja) * | 1991-10-28 | 1993-10-19 | Mitsui Toatsu Chem Inc | 人工象牙 |
| JP3056985B2 (ja) * | 1995-10-19 | 2000-06-26 | 株式会社河合楽器製作所 | 抗菌鍵盤 |
| DE19632409A1 (de) | 1996-08-02 | 1998-02-05 | Hiper Ceramics Gmbh | Klaviertaste mit Oberfläche aus Keramik |
| DE19930335A1 (de) * | 1999-07-02 | 2001-01-18 | Henkel Kgaa | Kompositmaterialien aus Calciumverbindungen und Proteinkomponenten |
| JP3727059B2 (ja) * | 2002-05-01 | 2005-12-14 | 独立行政法人科学技術振興機構 | 多孔質複合材料の製造方法 |
| JP3914501B2 (ja) * | 2003-02-17 | 2007-05-16 | 財団法人川村理化学研究所 | 高分子ゲル複合材及びその製造法 |
| WO2007040574A2 (en) * | 2004-12-16 | 2007-04-12 | Regents Of The University Of Minnesota | Biomimetic nanocomposite |
| CA2616865C (en) * | 2005-07-28 | 2014-07-08 | Carnegie Mellon University | Biocompatible polymers and methods of use |
| US20100040668A1 (en) * | 2006-01-12 | 2010-02-18 | Rutgers, The State University Of New Jersey | Biomimetic Hydroxyapatite Composite Materials and Methods for the Preparation Thereof |
| US20100272693A1 (en) * | 2007-11-30 | 2010-10-28 | Eunah Lee | Bone scaffolds, injectable bone repair materials and methods for bone repair |
| CN101239202B (zh) | 2008-03-12 | 2010-08-25 | 天津大学 | 纳米片状羟基磷灰石与明胶复合材料和制备方法 |
| CN101401960B (zh) * | 2008-11-07 | 2013-04-03 | 东南大学 | 明胶-羟基磷灰石复合球形颗粒的制备方法 |
| EP2529764A1 (de) * | 2011-05-31 | 2012-12-05 | Curasan AG | Biologisch degradierbares kompositmaterial |
| CN103483754B (zh) | 2012-06-14 | 2015-08-19 | 森鹤乐器股份有限公司 | 一种钢琴白键皮的生产方法与一种钢琴白键 |
| DE102013109847A1 (de) * | 2013-09-09 | 2015-03-12 | Heraeus Kulzer Gmbh | Formulierungen und Kit zur biomimetischen Abscheidung von Apatit auf Zähnen |
| CN104353122B (zh) * | 2014-11-24 | 2017-04-12 | 吴志宏 | 一种具有仿生三维微支架的3d打印多孔金属及其制备方法 |
| GB201516179D0 (en) * | 2015-09-14 | 2015-10-28 | Fujifilm Mfg Europe Bv | Bone void filling composite |
-
2017
- 2017-07-12 DE DE102017115672.0A patent/DE102017115672B4/de active Active
-
2018
- 2018-07-05 WO PCT/EP2018/068208 patent/WO2019011771A1/de not_active Ceased
- 2018-07-05 US US16/629,835 patent/US20210087400A1/en not_active Abandoned
- 2018-07-05 JP JP2020501457A patent/JP2020528469A/ja active Pending
- 2018-07-05 KR KR1020207003666A patent/KR102419601B1/ko active Active
- 2018-07-05 BR BR112020000678-5A patent/BR112020000678A2/pt not_active Application Discontinuation
- 2018-07-05 CN CN201880046002.0A patent/CN110891899A/zh active Pending
- 2018-07-05 EP EP18739499.4A patent/EP3652108A1/de not_active Withdrawn
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2020
- 2020-01-10 ZA ZA2020/00183A patent/ZA202000183B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020528469A (ja) | 2020-09-24 |
| KR102419601B1 (ko) | 2022-07-11 |
| US20210087400A1 (en) | 2021-03-25 |
| DE102017115672A1 (de) | 2019-01-17 |
| WO2019011771A1 (de) | 2019-01-17 |
| KR20200028972A (ko) | 2020-03-17 |
| ZA202000183B (en) | 2021-08-25 |
| BR112020000678A2 (pt) | 2020-07-14 |
| DE102017115672B4 (de) | 2020-08-27 |
| CN110891899A (zh) | 2020-03-17 |
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