Wearable human body affinity poly (siloxane-urethane) material resistant to sweat and seawater and preparation method of wearable human body affinity poly (siloxane-urethane) material
By preparing poly(siloxane-urethane) materials, the problem of polyurethane materials being susceptible to water erosion was solved by utilizing the synergistic effect of fluorine and silicon atoms and dynamic oxime bonds. This improved the hydrophobic properties and thermal stability of the materials, and gave them self-healing capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGZHOU UNIV
- Filing Date
- 2026-04-15
- Publication Date
- 2026-05-12
AI Technical Summary
Polyurethane materials contain hydrophilic urethane bonds, resulting in poor hydrophobic properties and susceptibility to aqueous solutions. Furthermore, existing methods of modification using nanofillers suffer from insufficient dispersibility and disruption of the microphase separation structure, making large-scale production difficult.
Prepolymers were prepared by reacting hydroxyl-terminated polysiloxanes with polyols and isocyanates. By adding small-molecule fluorinated diols and reacting them with diaminoethylenedioxime, the synergistic effect of fluorine and silicon atoms was introduced to form dynamic oxime bonds, thereby improving the hydrophobic properties and thermal stability of the material.
The prepared poly(siloxane-urethane) material has good hydrophobic properties, thermal stability and self-healing ability, thus extending its service life.
Smart Images
Figure CN122011337A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of polyurethane material preparation technology, specifically relating to a wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater and its preparation method. Background Technology
[0002] Polyurethane is a widely used polymer material whose performance can be controlled by adjusting the composition of its raw materials. It combines the high elasticity and wear resistance of rubber with the processability of plastics, making it widely used in coatings, adhesives, and other fields, truly deserving the title of "universal material." However, due to the presence of hydrophilic urethane bonds, polyurethane materials have poor hydrophobic properties and are easily corroded by aqueous solutions.
[0003] To address this issue, nanofillers are added to construct micro / nano structures to improve the hydrophobic properties of materials. However, this method suffers from insufficient filler dispersion, leading to agglomeration, which not only reduces the mechanical properties of the material but also disrupts its microphase separation structure, significantly shortening its lifespan. Therefore, introducing hydrophobic groups is another approach to enhance hydrophobicity. For example, Sun Lianlai et al. prepared a highly wear-resistant superhydrophobic coating using self-made high-performance fluorinated polyurethane and modified nano-SiO2 as raw materials. Hong Chengyu introduced fluorinated siloxane (HTFSi) modified monomers containing both organosilicon and organofluorine hydrophobic units into a polyether-type waterborne polyurethane system via a condensation reaction, producing a fluorinated siloxane-modified waterborne polyurethane material. This material possesses both the flexibility of siloxane segments and the low free energy of fluoroalkyl groups, forming a low surface energy hydrophobic outer layer on the material surface, thus improving its hydrophobicity and water resistance. However, due to the relatively high price of fluorinated siloxanes and the complex processing procedures, large-scale production is difficult. Summary of the Invention
[0004] This invention addresses the shortcomings of existing technologies by providing a wearable, human-friendly poly(siloxane-urethane) material resistant to sweat and seawater, along with its preparation method. This solves the problem that most polyurethanes are susceptible to aqueous solution corrosion. The prepared poly(siloxane-urethane) material, based on the synergistic effect of fluorine and silicon atoms, exhibits excellent hydrophobic properties and thermal stability, while also possessing a certain degree of self-healing ability, ensuring the material's performance and lifespan.
[0005] The present invention adopts the following technical solution:
[0006] Wearable, human-friendly poly(siloxane-urethane) material resistant to sweat and seawater is prepared by reacting hydroxyl-terminated polysiloxanes and polyols with isocyanates to obtain a prepolymer, which is then reacted with a small-molecule fluorinated diol and diaminoethylenedioxime. The specific preparation steps are as follows:
[0007] (1) Add fluorine-containing monomers, dihydroxy organic compounds and acetone to a beaker and dissolve them. Then add a photoinitiator and irradiate under ultraviolet light for 1 h to initiate the reaction. Place the obtained product in an oven to dry and obtain a small molecule fluorine-containing diol.
[0008] The fluorinated monomer is 1H,1H,2H-perfluoro-1-hexene or 1H,1H,2H-perfluoro-1-decene; the dihydroxy organic compound is thioglycerol; the photoinitiator is benzoin dimethyl ether, 2,2-diethoxyacetophenone or 2-hydroxy-2-methylphenylacetone; the molar ratio of the fluorinated monomer to the dihydroxy organic compound is 1.05-1.12:1; and the photoinitiator accounts for 0.5% of the total mass of the raw materials.
[0009] (2) The hydroxyl-terminated polysiloxane and polyol were placed in an oven to remove water for 2 h. After water removal, the hydroxyl-terminated polysiloxane and polyol were dissolved in N,N-dimethylformamide and added to a three-necked flask with nitrogen gas. The isocyanate dissolved in N,N-dimethylformamide was added dropwise to the flask using a dropping funnel. Then, a catalyst and organic solvent were added. The stirring speed was controlled at 120-180 r / min and the mixture was reacted at 70-80℃ for 2 h to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0010] The hydroxyl-terminated polysiloxane is hydroxyl-terminated polydimethylsiloxane, the polyol is polytetrahydrofuran ether diol, and the isocyanate is one of hexamethylene diisocyanate, toluene diisocyanate, and diphenylmethane diisocyanate. The molar ratio of polysiloxane, polyol, and isocyanate is 0.5-1:1:4.1-5.1. The catalyst is dibutyltin dilaurate or stannous octoate.
[0011] (3) Cool the system of step (2) to 40°C, add small molecule fluorinated diol and diaminodioxime dropwise, and after the addition is complete, slowly raise the system temperature to 70°C and continue the reaction under nitrogen atmosphere.
[0012] The molar ratio of the small molecule fluorinated diol to diaminodioxime and isocyanate is (1-2):1:(4.4-6).
[0013] The preferred specific structure of the obtained sweat- and seawater-resistant wearable human-friendly poly(siloxane-urethane) material is as follows:
[0014]
[0015] Beneficial effects:
[0016] This invention introduces fluorinated monomers and polysiloxanes. Through the synergistic effect of fluorine and silicon atoms, the surface energy of the material is reduced, and the bonding stability is improved. At the same time, dynamic oxime bonds are introduced, which, together with hydrogen bonds, endow the material with a certain self-healing ability, improve the hydrophobic properties of the material, and extend the service life of the material. Attached Figure Description
[0017] Figure 1 The infrared spectrum of the poly(siloxane-urethane) synthesized in Example 3 is shown.
[0018] Figure 2 Thermogravimetric curve of the poly(siloxane-urethane) synthesized in Example 3.
[0019] Figure 3 The thermogravimetric curve differential diagram of the poly(siloxane-urethane) synthesized in Example 3 is shown.
[0020] Figure 4 The stress-strain curve of the poly(siloxane-urethane) synthesized in Example 3 is shown.
[0021] Figure 5 The image shows the contact angle measurement of the poly(siloxane-urethane) synthesized in Example 3.
[0022] Figure 6 The image shows a comparison of the poly(siloxane-urethane) synthesized in Example 3 before (top) and after (bottom) recovery of scratches at 80°C for 24 hours. Detailed Implementation
[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] Example 1
[0025] Take 5 g of 1H,1H,2H-perfluoro-1-decene and 1.1 g of 1-thioglycerol in a beaker, add 0.03 g of 2-hydroxy-2-methylphenylacetone, dilute with acetone, and irradiate under a UV lamp for 1 h to initiate the reaction. Place the obtained product in an oven to obtain a small molecule fluorinated diol.
[0026] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 1 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was dissolved in 5 ml of N,N-dimethylformamide and added dropwise to the flask through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0027] The system was cooled to 40°C, and 7.6 g of the prepared small molecule fluorinated diol and 2.4 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0028] The hydrophobicity of the material was tested using a contact angle measuring instrument; the material was cut into dumbbell strips and subjected to tensile testing using a universal tensile testing machine, with the tensile rate controlled at 20 mm / min.
[0029] Example 2
[0030] The same small-molecule fluorinated diol was obtained as in Example 1.
[0031] The viscous isocyanate-terminated polyurethane prepolymer was prepared as in Example 1.
[0032] The system was cooled to 40°C, and 0.9 g of the prepared small molecule fluorinated diol and 0.2 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0033] Example 3
[0034] The same small-molecule fluorinated diol was obtained as in Example 1.
[0035] The viscous isocyanate-terminated polyurethane prepolymer was prepared as in Example 1.
[0036] The system was cooled to 40°C, and 1 g of the prepared small molecule fluorinated diol and 0.2 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0037] like Figure 1 The infrared spectrum of the prepared poly(siloxane-urethane) can be seen at 2250 cm⁻¹. -1The isocyanate peak disappeared at 3450 cm⁻¹, and the peak disappeared at 3450 cm⁻¹. -1 An NH peak appeared at 1680 cm⁻¹. -1 A C=O stretching vibration peak appears at 1100 cm⁻¹. -1 The appearance of a Si-O-Si stretching vibration peak at the point proves the successful preparation of poly(siloxane-urethane). Figure 2 , Figure 3 Thermogravimetric analysis of poly(siloxane-urethane) shows that the temperature at which the material has a 5% mass loss rate is 169℃, and the temperature at which the residual carbon rate is 30% is 402℃. Figure 4 The stress-strain curve of the material shows that its Young's modulus is close to 3 MPa, indicating good toughness. Figure 5 The diagram shows the contact angle measurement of the material. The test results show that the contact angle of the material reached 84°, indicating good hydrophobic properties.
[0038] Example 4
[0039] The same small-molecule fluorinated diol was obtained as in Example 1.
[0040] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 0.3 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 0.9 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel in 5 ml of N,N-dimethylformamide. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0041] The system was cooled to 40°C, and 0.6 g of the prepared small molecule fluorinated diol and 0.1 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0042] Example 5
[0043] The same small-molecule fluorinated diol was obtained as in Example 1.
[0044] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 0.8 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 0.9 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel in 5 ml of N,N-dimethylformamide. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0045] The system was cooled to 40°C, and 0.5 g of the prepared small molecule fluorinated diol and 0.1 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0046] Example 6
[0047] The same small-molecule fluorinated diol was obtained as in Example 1.
[0048] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 0.8 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.8 g of isophorone diisocyanate was added dropwise to the flask in 5 ml of N,N-dimethylformamide through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0049] The system was cooled to 40°C, and 0.9 g of the prepared small molecule fluorinated diol and 0.2 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0050] Example 7
[0051] The same small-molecule fluorinated diol was obtained as in Example 1.
[0052] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 0.8 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was added dropwise to the flask in 5 ml of N,N-dimethylformamide through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0053] The system was cooled to 40°C, and 0.9 g of the prepared small molecule fluorinated diol and 0.2 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0054] Example 8
[0055] Take 5 g of 1H,1H,2H-perfluoro-1-decene and 1.1 g of 1-thioglycerol in a beaker, add 0.03 g of benzoin dimethyl ether, dilute with acetone, and irradiate under a UV lamp for 1 h to initiate the reaction. Place the obtained product in an oven to obtain a small molecule fluorinated diol.
[0056] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 1 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in 5 ml of N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel in 5 ml of N,N-dimethylformamide. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0057] The system was cooled to 40°C, and 0.9 g of the prepared small molecule fluorinated diol and 0.2 g of diaminoethylene dioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0058] Example 9
[0059] Take 4.2 g of 1H,1H,2H-perfluoro-1-hexene and 1.1 g of 1-thioglycerol in a beaker, add 0.03 g of 2,2-dimethoxy-2-phenylacetophenone, dilute with acetone, and irradiate under a UV lamp for 1 h to initiate the reaction. Place the obtained product in an oven to obtain a small molecule fluorinated diol.
[0060] The viscous isocyanate-terminated polyurethane prepolymer was prepared as in Example 2.
[0061] The poly(siloxane-urethane) was prepared as in Example 2.
[0062] Compare with Example 1
[0063] The viscous isocyanate-terminated polyurethane prepolymer was prepared as in Example 1.
[0064] The system was cooled to 40°C, and 0.5 g of diaminoethylenedioxime was slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0065] Compare with Example 2
[0066] The same small-molecule fluorinated diol was obtained as in Example 1.
[0067] Polytetrahydrofuran ether glycol was placed in an oven to remove water for 2 hours. After dehydration, 4 g of polytetrahydrofuran ether glycol was dissolved in N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0068] The system was cooled to 40°C, and 0.9 g of the prepared small-molecule fluorinated diol and 0.2 g of diaminoethylenedioxime were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain polyurethane.
[0069] Compare with Example 3
[0070] The same small-molecule fluorinated diol was obtained as in Example 1.
[0071] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 0.8 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0072] The system was cooled to 40°C, and 0.9 g of the prepared small molecule fluorinated diol and 0.2 g of 1,4-butanediol were slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0073] Compare with Example 4
[0074] The same small-molecule fluorinated diol was obtained as in Example 1.
[0075] Hydroxyl-terminated polydimethylsiloxane and polytetrahydrofuran ether glycol were placed in an oven to remove water for 2 hours. After dehydration, 1 g of polydimethylsiloxane and 2 g of polytetrahydrofuran ether glycol were dissolved in N,N-dimethylformamide and added to a three-necked flask purged with nitrogen. 1.4 g of toluene diisocyanate was added dropwise to the flask through a dropping funnel. Then, 0.05 g of dibutyltin dilaurate was added. N,N-dimethylformamide was used to reduce the viscosity of the reaction system. The stirring speed was controlled at 120-180 r / min, and the reaction was carried out at 70-80℃ for 2 hours to obtain a viscous isocyanate-terminated polyurethane prepolymer.
[0076] The system was cooled to 40°C, and 1.8 g of the prepared small molecule fluorinated diol was slowly added according to the viscosity of the system. After the addition was completed, the system temperature was slowly raised to 70°C, and the reaction was continued under a nitrogen atmosphere to obtain poly(siloxane-urethane).
[0077] Table 1
[0078] .
Claims
1. A method for preparing a wearable, human-friendly poly(siloxane-urethane) material resistant to sweat and seawater, characterized in that: The preparation method steps are as follows: (1) Preparation of small molecule fluorinated diols by reacting fluorinated monomers with dihydroxyl organic compounds; (2) Dissolve the hydroxyl-terminated polysiloxane and polyol in N,N-dimethylformamide and transfer them to a reaction flask. Use a dropping funnel to add the isocyanate dissolved in N,N-dimethylformamide dropwise to the reaction flask, and then add a catalyst to carry out the catalytic reaction. (3) Cool down the system in step (2), add small molecule fluorinated diol and diaminoethylenedioxime, and continue the reaction under a nitrogen atmosphere.
2. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 1, characterized in that: In step (1), the preparation method of small molecule fluorinated diol is as follows: add fluorinated monomer, dihydroxy organic compound and acetone to beaker and dissolve, then add photoinitiator, and irradiate under ultraviolet light for 1 h to initiate reaction. The obtained product is placed in an oven to dry and obtain small molecule fluorinated diol.
3. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 2, characterized in that: The fluorinated monomer is 1H,1H,2H-perfluoro-1-hexene or 1H,1H,2H-perfluoro-1-decene; the dihydroxyl organic compound is thioglycerol, and the molar ratio of the fluorinated monomer to the dihydroxyl organic compound is 1.05-1.12:
1.
4. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 2, characterized in that: The photoinitiator is benzoin dimethyl ether, 2,2-diethoxyacetophenone or 2-hydroxy-2-methylphenylacetone.
5. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 1, characterized in that: In step (2), the hydroxyl-terminated polysiloxane is hydroxyl-terminated polydimethylsiloxane; the polyol is polytetrahydrofuran ether diol.
6. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 1, characterized in that: In step (2), the isocyanate is one of toluene diisocyanate, hexamethylene diisocyanate, and diphenylmethane diisocyanate, and the molar ratio of polysiloxane, polyol, and isocyanate is 0.5-1:1:4.1-5.
1.
7. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 1, characterized in that: In step (3), the catalyst is dibutyltin dilaurate or stannous octoate.
8. The method for preparing the wearable human-friendly poly(siloxane-urethane) material resistant to sweat and seawater as described in claim 1, characterized in that: In step (3), the molar ratio of the small molecule fluorinated diol to diaminodioxime and isocyanate is 1-2:1:4.4-6.
9. A wearable, human-friendly poly(siloxane-urethane) material resistant to sweat and seawater, prepared by the method described in claim 1, characterized in that... The general structural formula of the poly(siloxane-urethane) material is as follows: 。