Bio-based optical resin containing isosorbide structure as well as preparation method and application of bio-based optical resin

Abstract

The invention provides bio-based optical resin containing an isosorbide structure as well as a preparation method and application of the bio-based optical resin. The bio-based optical resin contains a repeating unit with a structure as shown in a formula (I). The bio-based optical resin has good comprehensive performance and high optical refractive index and thermal stability, the refractive index of the obtained bio-based optical resin containing the isosorbide structure reaches 1.565-1.636, and the bio-based optical resin can meet the performance requirement of the optical resin in optical components. The preparation method disclosed by the invention is simple, mild in reaction condition, small in catalyst dosage, low in equipment requirement and convenient for large-scale production, and is an efficient and environment-friendly bio-based optical resin preparation process.

Description

Technical Field

[0001] The present invention belongs to the field of optical materials, and in particular relates to a bio-based optical resin containing an isosorbide structure, a preparation method and an application thereof. Background Art

[0002] Isosorbide is a diol monomer derived from a green and sustainable development of biomass raw materials, and its raw materials are mainly glucose, sorbitol and cellulose, etc., and the raw material sources are rich and cheap (Wang Y, Wu J, Koning CE, et al. Short-process synthetic strategies of sustainable isohexide-based polyesters towards higher molecular weight and commercial applicability [J]. Green Chemistry, 2022, 24 (22): 8637-8670.). In biomass resources, isosorbide is a renewable raw material substitute for petroleum derivatives that can be used for commercial polymer production. At present, isosorbide is used as a monomer for the modification and preparation of polymers such as polyethers, polyesters, polyurethanes and polycarbonates, and has a high research heat in recent years. Isosorbide polycarbonate (PIC) has two reflexively connected furan rings in its structure and has similar chemical properties to benzene rings. It has advantages such as high rigidity, high heat resistance, high light transmittance and low yellowness. It is expected to replace the traditional thermoplastic engineering plastic bisphenol A polycarbonate (BPA-PC).

[0003] As a transparent bio-based polycarbonate material, PIC has good biocompatibility and can be used in optical lenses, optical films, biomedical lenses and other components. In recent years, the development of lightweight and thin electronic products and medical lenses has put forward higher requirements for the development of high refractive index optical resins. However, the low refractive index (n D=1.497), limiting its application in optical lenses, optical film materials, and other fields. Researchers have been working to improve the refractive index of PIC through copolymerization modification: Song et al. introduced 30% alicyclic or aromatic ring structures on the PIC backbone structure, raising the refractive index of PIC to 1.5394 (Song Z, Xu F, Wang H, et al. Design and synthesis of isosorbide-based copolycarbonates with high transparency and low hygroscopicity for optical applications [J]. Journal of Applied Polymer Science, 2023: e54009.); while Chu et al. could only increase the refractive index of PIC to 1.5536 at most by introducing 30% sulfur-containing aromatic ring comonomers (Chu J, Wang H, Zhang Y, et al. Design and synthesis of gradient-refractive index isosorbide-based polycarbonates for optical uses [J]. Reactive and Functional Polymers, 2022, 170: 105145.). During the melt polycondensation process, excessive sulfur-containing monomers are detrimental to increasing the degree of polymerization of PIC and can easily oxidize the sites. Therefore, the development of isosorbide-based optical resins with high refractive index and thermal stability has great industrial value.

[0004] Bio-based polymer materials have a huge market potential for development, and with the continuous reduction of petrochemical resources, bio-based polymer materials will become a key industry direction. However, research and development of high-refractive bio-based optical resin materials containing isosorbide structures is relatively limited. Summary of the Invention

[0005] In response to the shortcomings of the prior art, the present invention aims to provide a bio-based optical resin containing an isosorbide structure, and its preparation method and application. The bio-based optical resin containing an isosorbide structure of the present invention has excellent properties such as high refractive index and high thermal stability. The refractive index can reach up to 1.636, which can meet the performance requirements of isosorbide-based polymers as optical resins in optical components.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a bio-based optical resin containing an isosorbide structure, wherein the bio-based optical resin contains a repeating unit of a structure shown in formula (I):

[0008]

[0009] Wherein, —R1— is —CH2— or —CH2-CH2-; —R2— is any one of the following groups:

[0010] (1) Bisphenol skeleton structure:

[0011]

[0012] (2) Bisnaphthol skeleton structure:

[0013]

[0014] Specifically, the structural unit represented by formula (I) in the present invention incorporates sulfur and polyaromatic rings, such as bisphenol or bisnaphthol structures, to increase the molar refractive index of the polymer repeating unit, thereby enhancing the optical refractive index of the bio-based optical resin. Furthermore, the polyaromatic ring structure is highly unsaturated, resulting in exceptional chemical stability of the molecular structure, thus imparting excellent thermal stability to the bio-based optical resin. Consequently, the isosorbide-containing bio-based optical resin of the present invention exhibits both a high refractive index and high thermal stability.

[0015] Preferably, the structural formula of the bio-based optical resin containing an isosorbide structure is any one of formulas (I-1) to (I-15), but is not limited to the following structural formula:

[0016]

[0017]

[0018]

[0019] Preferably, the refractive index of the bio-based optical resin containing an isosorbide structure can reach 1.565 to 1.636, such as 1.565, 1.570, 1.593, 1.600, 1.613, 1.625, 1.633 or 1.636. Preferably, the glass transition temperature of the bio-based optical resin containing an isosorbide structure is 41°C to 164°C, such as 43°C, 45°C, 50°C, 60°C, 80°C, 100°C, 120°C, 140°C, 160°C or 164°C. Preferably, the weight average molecular weight of the bio-based optical resin containing an isosorbide structure is 1.77×10 4 ~9.64×10 4 g / mol, for example, 1.77×104 g / mol, 2.12×10 4 g / mol, 2.25×10 4 g / mol, 2.35×10 4 g / mol, 2.40×10 4 g / mol, 2.45×10 4 g / mol, 2.50×10 4 g / mol, 2.55×10 4 g / mol, 2.60×10 4 g / mol, 2.65×10 4 g / mol, 2.73×10 4 g / mol, 2.78×10 4 g / mol, 3.0×10 4 g / mol, 3.50×10 4 g / mol, 4.0×10 4 g / mol, 4.50×10 4 g / mol, 5.0×10 4 g / mol, 5.5×10 4 g / mol, 6.0×10 4 g / mol, 7.0×10 4 g / mol, 7.55×10 4 g / mol, 7.83×10 4 g / mol, 8.0×10 4 g / mol, 8.57×10 4 g / mol, 9.0×10 4 g / mol, 9.38×10 4 g / mol or 9.64×10 4 On the other hand, the present invention provides a method for preparing the bio-based optical resin containing an isosorbide structure as described above, the preparation method comprising the following steps:

[0020] The isosorbide dithiol compound and the diacrylate compound undergo a polymerization reaction to obtain the bio-based optical resin containing the isosorbide structure;

[0021] The structure of the isosorbide dithiol compound is as follows:

[0022] The structure of the diacrylate compound is as follows:

[0023] Preferably, the isosorbide dithiol compound is any one of the following compounds: Further optimization

[0024] Preferably, the diacrylate compound is any one of the following compounds, but is not limited to the following compounds:

[0025] (1) Bisphenol diacrylate:

[0026]

[0027] (2) Bis-naphthol diacrylate:

[0028]

[0029] Preferably, the molar ratio of the diacrylate compound to the isosorbide dithiol compound is 1:0.9-1.1, for example, 1:0.9, 1:0.95, 1:0.98, 1:1, 1:1.05, 1:1.08 or 1:1.1.

[0030] Preferably, the polymerization reaction is carried out in the presence of a catalyst.

[0031] Preferably, the cation in the ionic liquid catalyst is selected from any one of imidazolium cations, quaternary ammonium cations, quaternary phosphine cations, piperidine cations and pyridinium cations; and the anion is selected from any one of carboxylic acid anions, lactic acid anions, amino acid anions or amide anions.

[0032] Preferably, the organic base catalyst is at least one of triethylamine, tributylamine, pyridine, tetramethylguanidine, piperidine, piperazine, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, 1,5-diazabicyclo[4.3.0]non-5-ene or 1,4-diazidebicyclo[2.2.2]octane.

[0033] Preferably, the molar ratio of the catalyst to the isosorbide dithiol compound is 1×10 -5 -1.5×10 -1 :1, for example 1×10 -5 :1, 3×10 -5 :1,5×10 -5 :1, 8×10 -5 :1, 1×10 -4 :1, 3×10 -4 :1,5×10 -4 :1, 8×10 -4 :1, 1×10 -3 :1, 3×10 -3 :1,5×10 -3 :1, 8×10 -3:1, 1×10 -2 :1, 3×10 -2 :1,5×10 -2 :1, 8×10 -2 :1, 1×10 -1 :1 or 1.5×10 -1 :1.

[0034] The high-refractive bio-based optical resin of the present invention has further enhanced excellent processing performance, and the molecular weight of the polymer can be controllably adjusted according to the requirements of different application scenarios and processing conditions through the regulation of different catalysts.

[0035] In the present invention, the polymerization reaction is a click polymerization reaction.

[0036] Preferably, the polymerization reaction is carried out under nitrogen protection.

[0037] Preferably, the polymerization reaction temperature is 0 to 120°C (e.g., 0°C, 5°C, 8°C, 10°C, 30°C, 50°C, 80°C, 100°C or 120°C), the reaction pressure is normal pressure, and the reaction time is 1 to 24h (e.g., 1h, 3h, 5h, 8h, 10h, 12h, 15h, 18h, 20h, 22h or 24h).

[0038] Preferably, the polymerization reaction is carried out in solvent A, and the solvent A is selected from any one of dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, cyclohexanone, dioxane, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropylene urea, and N-methylpyrrolidone, or a mixture of at least two thereof.

[0039] Preferably, the amount of solvent A is 2 to 32 times the total mass of isosorbide diacrylate and dithiol compound, for example, 2 times, 5 times, 8 times, 10 times, 13 times, 15 times, 18 times, 20 times, 22 times, 25 times, 28 times, 30 times or 32 times.

[0040] Preferably, after the polymerization reaction is completed, the reaction solution is added to solvent B, regenerated, washed and purified to obtain the bio-based optical resin containing the isosorbide structure.

[0041] Preferably, the solvent B is selected from any one of methanol, ethanol, isopropanol, ether or water, or a combination of at least two thereof.

[0042] Preferably, the amount of solvent B is 20 to 100 times that of solvent A, for example, 20 times, 25 times, 30 times, 35 times, 40 times, 45 times, 50 times, 55 times, 60 times, 65 times, 70 times, 75 times, 80 times, 85 times, 90 times, 95 times or 100 times.

[0043] The preparation method of the present invention uses an isosorbide dithiol compound and a diacrylate compound as raw materials, and generates a bio-based optical resin through a click polymerization reaction under the action of a catalyst. The preparation method can easily obtain a bio-based optical resin with a high refractive index, high thermal stability, and an adjustable molecular weight. The amount of catalyst used is small, the reaction conditions are mild, the reaction process does not cause environmental pollution, the product does not contain toxic substances, the process is simple, and large-scale production is convenient. The preparation method is an efficient, green and environmentally friendly bio-based optical resin preparation process.

[0044] In the present invention, the following additives may be added to the high-refractive-index bio-based optical resin according to the performance requirements of different application scenarios: any one or a combination of at least two of antioxidants, plasticizers, anti-aging agents, heat stabilizers, fillers, dyes, light stabilizers, UV absorbers, flame retardants, antistatic agents, release agents, or antimicrobial agents. This can enhance the resin's antioxidant, UV resistance, antimicrobial, flame retardant, and stability properties. The amount of additives can be adjusted as needed.

[0045] On the other hand, the present invention provides the use of the bio-based optical resin containing an isosorbide structure as described above in optical films, optical components, electronic products, electrical equipment, packaging materials or medical devices.

[0046] In another aspect, the present invention provides an optical product comprising the bio-based optical resin containing an isosorbide structure as described above.

[0047] The bio-based optical resin containing an isosorbide structure of the present invention can be made into an optical product having excellent properties such as high refractive index and high thermal stability.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The bio-based optical resin containing an isosorbide structure of the present invention exhibits excellent properties such as high refractive index and high thermal stability. By processing and using the bio-based optical resin, optical lenses or optical films with better performance can be prepared, which can be used in optical components, electronic products, electrical equipment, packaging materials or medical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 The H NMR of the polymer obtained in Example 1 is 1 H-NMR spectrum;

[0051] Figure 2 The H NMR of the polymer obtained in Example 2 is 1 H-NMR spectrum;

[0052] Figure 3 The H NMR of the polymer obtained in Example 3 is 1 H-NMR spectrum;

[0053] Figure 4 The H NMR of the polymer obtained in Example 4 is 1 H-NMR spectrum;

[0054] Figure 5 Thermogravimetric (TGA) graphs of the polymers prepared in Examples 1-4;

[0055] Figure 6 The DSC diagrams of the polymers prepared in Examples 1-4 are shown. DETAILED DESCRIPTION

[0056] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0057] Example 1

[0058] The preparation steps of bio-based optical resin are as follows:

[0059]

[0060] At room temperature, 0.03 mol of isosorbide bis(3-mercaptopropionate) (IS3DT) and 0.03 mol of bisphenol A diacrylate (BPADA) were dissolved in 60 mL of the organic solvent N,N-dimethylacetamide (DMAc). An imidazolyl lactate ionic liquid [Emim][Lac] catalyst (0.05 mol% of the diacrylate compound) was added under a nitrogen atmosphere and atmospheric pressure. The mixture was stirred at 25°C for 1 hour via click polymerization, then regenerated in 1800 mL of the anti-solvent methanol. After washing and purification, the bio-based optical resin material PITE-A was obtained.

[0061] Example 2

[0062] The preparation steps of bio-based optical resin are as follows:

[0063]

[0064] At room temperature, 0.02 mol of isosorbide bis(3-mercaptopropionate) (IS3DT) and 0.02 mol of bisphenol Z diacrylate (BPZDA) were dissolved in 40 mL of a 1:1 organic solvent mixture of N,N-dimethylacetamide (DMAc) and N-methylpyrrolidone (NMP). Under a nitrogen atmosphere and atmospheric pressure, triethylamine (TEA) was added as a catalyst, with the catalyst dosage being 15 mol% of the diacrylate compound. The mixture was stirred at 60°C for 12 hours via click polymerization, and then regenerated in 1000 mL of anti-solvent water. After washing and purification, the bio-based optical resin material PITE-Z was obtained.

[0065] Example 3

[0066] The preparation steps of bio-based optical resin are as follows:

[0067]

[0068] At room temperature, 0.03 mol of isosorbide bis(3-mercaptopropionate) (IS3DT) and 0.03 mol of bisphenolanthrone diacrylate (BPAQDA) were dissolved in 100 mL of N,N-dimethylformamide (DMF), an organic solvent. An ionic liquid [Bmim][Ac] catalyst (5 mol% of the diacrylate compound) was added under a nitrogen atmosphere and atmospheric pressure. The mixture was stirred at 80°C for 24 hours via click polymerization, then regenerated in 1500 mL of the anti-solvent methanol. After washing and purification, the bio-based optical resin material PITE-AQ was obtained.

[0069] Example 4

[0070] The preparation steps of bio-based optical resin are as follows:

[0071]

[0072] At room temperature, 0.03 mol of isosorbide bis(3-mercaptopropionate) (IS3DT) and 0.03 mol of bisnaphtholfluorene diacrylate (BNFDA) were dissolved in 60 mL of the organic solvent N-methylpyrrolidone (NMP). An ionic liquid [DBU][Lac] catalyst (2 mol% of the diacrylate compound) was added under a nitrogen atmosphere and atmospheric pressure. The mixture was stirred at 120°C for 3 hours via click polymerization. The mixture was then regenerated in 2000 mL of the anti-solvent methanol. After washing and purification, the bio-based optical resin material PITE-NF was obtained.

[0073] Example 5

[0074] The preparation steps of bio-based optical resin are as follows:

[0075]

[0076] At room temperature, 0.03 mol of isosorbide bis(2-mercaptoacetate) (IS2DT) and 0.03 mol of bisphenol A diacrylate (BPADA) were dissolved in 60 mL of tetrahydrofuran (THF), an organic solvent. Under a nitrogen atmosphere and atmospheric pressure, an organic base 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) catalyst (2 mol% of the diacrylate compound) was added. The mixture was stirred at 30°C for 1 hour via click polymerization, then regenerated in 1800 mL of the anti-solvent methanol. After washing and purification, the bio-based optical resin material P2TE-A was obtained.

[0077] Example 6

[0078] The preparation steps of bio-based optical resin are as follows:

[0079]

[0080] At room temperature, 0.05 mol of isosorbide bis(2-mercaptoacetate) (IS2DT) and 0.05 mol of bisphenol Z diacrylate (BPZDA) were dissolved in 50 mL of chloroform (CHCl3), and ionic liquid tetraethylammonium lactate [N 2222 [Lac] catalyst, the catalyst amount is 8 mol% of the amount of the diacrylate compound. The mixture is stirred at 80° C. for 3 h through click polymerization reaction, then added to 1000 mL of anti-solvent methanol for regeneration, and washed and purified to obtain the bio-based optical resin material P2TE-Z.

[0081] Example 7

[0082] The preparation steps of bio-based optical resin are as follows:

[0083]

[0084] At room temperature, 0.01 mol of isosorbide bis(2-mercaptoacetate) (IS2DT) and 0.01 mol of bisphenolfluorene diacrylate (BPFDA) were dissolved in 20 mL of the organic solvent N,N-dimethylacetamide (DMAc). Under a nitrogen atmosphere and atmospheric pressure, an organic base 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) catalyst (5 mol% of the diacrylate compound) was added. The mixture was stirred at 100°C for 5 hours via click polymerization. The mixture was then regenerated in 500 mL of the anti-solvent diethyl ether. After washing and purification, the bio-based optical resin material P2TE-F was obtained.

[0085] Comparative Example 1

[0086] The same operation as in Example 1 was carried out except that 0.03 mol of isosorbide diacrylate compound was used as a raw material to obtain a bio-based resin material PITE-IS.

[0087] Comparative Example 2

[0088] The same operation as in Example 1 was carried out except that no catalyst was used.

[0089] The deuterated chloroform nuclear magnetic resonance (NMR) spectrum of the resins obtained in Examples 1-4 was tested using a 600 MHz nuclear magnetic resonance (NMR) spectrometer. Figures 1-4 As shown, each peak was attributed, and it can be seen that Examples 1-4 successfully prepared the resin.

[0090] The thermal and physical properties of the bio-based optical resin materials containing isosorbide structure provided in Examples 1 to 7 and Comparative Examples 1 to 2, including the glass transition temperature T g , 5% thermal decomposition temperature T d-5％ , weight average molecular weight M w , refractive index, Abbe number.

[0091] 1. The samples used for performance evaluation were prepared by the following method:

[0092] (a) Film: 1 g of the obtained bio-based optical resin was dissolved in 10 mL of dichloromethane and cast on a glass dish. After fully drying at room temperature, a film with a thickness of about 100 μm was prepared.

[0093] 2. Evaluation test methods are as follows:

[0094] (a) Weight average molecular weight (M w ):A PL-GPC 50 gel permeation chromatograph manufactured by Agilent Technologies was used, N,N-dimethylformamide (DMF) was used as the developing solvent, and a standard curve was prepared using monodisperse polystyrene of known molecular weight as the standard sample. Based on this standard curve, M was obtained from the GPC retention time. w .

[0095] (b) Refractive index (n D )

[0096] The refractive index of the film produced by the method (a) at 25° C. was measured using a DR-M4 Abbe refractometer manufactured by ATAGO at a wavelength of 589 nm.

[0097] (c) Abbe number (V D )

[0098] According to the refractive index test method in (b), the refractive index at 25°C and wavelengths of 486nm, 589nm, and 656nm is tested respectively. The formula V D =(n D -1) / (n F -n C ) is calculated, where n D is the refractive index at a wavelength of 589 nm, n F is the refractive index at a wavelength of 656 nm, n C is the refractive index at a wavelength of 486 nm.

[0099] (d) Glass transition temperature T g , 5% thermal decomposition temperature T d-5％

[0100] The prepared bio-based optical resin T g and T d-5％ The temperature was raised to 600°C for testing using a METTLER TOLEDO differential scanning calorimeter (TGA / DSC 3+) under a nitrogen (N2) atmosphere at a heating rate of 10°C / min.

[0101] Figure 5 Thermogravimetric (TGA) graphs of the polymers prepared in Examples 1-4; Figure 6 The DSC diagrams of the polymers prepared in Examples 1-4 are shown.

[0102] The test data is shown in Table 1.

[0103] Table 1

[0104]

[0105] The test results in Table 1 show that the bio-based optical resin with specific repeating units provided by the present invention has a higher yield than the isosorbide-based polycarbonate (n D =1.497), the refractive index is significantly improved, the refractive index of the bio-based optical resin containing the isosorbide structure is as high as 1.565-1.636, the Abbe number is 22-38, there is no obvious birefringence phenomenon, and it has excellent optical properties.

[0106] The applicant states that while the above-described embodiments illustrate the bio-based optical resin containing an isosorbide structure, its preparation method, and its application, the present invention is not limited to these embodiments, nor does it necessarily rely on these embodiments for implementation. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the raw materials used, addition of auxiliary components, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A bio-based optical resin containing an isosorbide structure, characterized in that: The bio-based optical resin contains repeating units of the structure shown in formula (I): Wherein, —R1— is —CH2— or —CH2-CH2-; —R2— is any one of the following groups:

2. The bio-based optical resin containing an isosorbide structure according to claim 1, wherein: The structural formula of the bio-based optical resin containing an isosorbide structure is any one of formulas (I-1) to (I-15):

3. The bio-based optical resin containing an isosorbide structure according to claim 1 or 2, characterized in that: The refractive index of the bio-based optical resin containing the isosorbide structure can reach 1.565 to 1.

636.

4. The bio-based optical resin containing an isosorbide structure according to any one of claims 1 to 3, characterized in that: The glass transition temperature of the bio-based optical resin containing an isosorbide structure is 41° C. to 164° C.; Preferably, the weight average molecular weight of the bio-based optical resin containing isosorbide structure is 1.77×10 4 ~9.64×10 4 g / mol.

5. The method for preparing a bio-based optical resin containing an isosorbide structure according to any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: The isosorbide dithiol compound and the diacrylate compound undergo a polymerization reaction to obtain the bio-based optical resin containing the isosorbide structure; The structure of the isosorbide dithiol compound is as follows: The structure of the diacrylate compound is as follows:

6. The preparation method according to claim 5, characterized in that The isosorbide dithiol compound is any one of the following compounds: Further optimization Preferably, the diacrylate compound is any one of the following compounds:

7. The preparation method according to claim 5 or 6, characterized in that: The molar ratio of the diacrylate compound to the isosorbide dithiol compound is 1:0.9-1.1; Preferably, the polymerization reaction is carried out in the presence of a catalyst; Preferably, the cation in the ionic liquid catalyst is selected from any one of imidazolium cations, quaternary ammonium cations, quaternary phosphine cations, piperidine cations and pyridinium cations; and the anion is selected from any one of carboxylic acid anions, lactic acid anions, amino acid anions or amide anions. Preferably, the organic base catalyst is at least one of triethylamine, tributylamine, pyridine, tetramethylguanidine, piperidine, piperazine, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, 1,5-diazabicyclo[4.3.0]non-5-ene or 1,4-diazidebicyclo[2.2.2]octane; Preferably, the molar ratio of the catalyst to the isosorbide dithiol compound is 1×10 -5 -1.5×10 -1 :

1.

8. The preparation method according to any one of claims 5 to 7, characterized in that The polymerization reaction is carried out under nitrogen protection; Preferably, the polymerization reaction temperature is 0 to 120° C., the reaction pressure is normal pressure, and the reaction time is 1 to 24 hours; Preferably, the polymerization reaction is carried out in solvent A, and the solvent A is selected from any one of dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, cyclohexanone, dioxane, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropylene urea, and N-methylpyrrolidone, or a mixture of at least two thereof; Preferably, the amount of solvent A is 2 to 32 times the total mass of isosorbide diacrylate and dithiol compound; Preferably, after the polymerization reaction is completed, the reaction solution is added to solvent B, regenerated, washed and purified to obtain the bio-based optical resin containing the isosorbide structure; Preferably, the solvent B is selected from any one or a combination of at least two of methanol, ethanol, isopropanol, diethyl ether or water; Preferably, the amount of solvent B used is 20 to 100 times the amount of solvent A used.

9. Use of the bio-based optical resin containing an isosorbide structure according to any one of claims 1 to 4 in optical films, optical components, electronic products, electrical equipment, packaging materials or medical devices.

10. An optical product, characterized in that: The optical product comprises the bio-based optical resin containing an isosorbide structure according to any one of claims 1 to 4.

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