Organic composite material, preparation method and application thereof in eyeglass frame plate

Abstract

The present application provides an organic composite material, a preparation method and an application thereof in eyeglass frame plates. The volatile essential oil component capable of relieving visual fatigue in a traditional Chinese medicine composition is first obtained by steam distillation, and the compound essential oil is extracted and mixed with a polylactic acid resin to prepare an organic composite material. The eyeglass frame prepared with the organic composite material as a constituent raw material has the function of sustained-release of natural traditional Chinese medicine extracts (i.e., compound essential oil) and relieving visual fatigue, effectively solving the problem of limited scope of action caused by concentrated liquid medicine, and does not require frequent replacement of liquid medicine or adsorption blocks, further enhancing its practical application effect.

Description

Technical Field

[0001] The present application relates to the technical field of eyeglass frames, and in particular to an organic composite material, a preparation method and application thereof in eyeglass frame plates. Background Art

[0002] At present, with the update and iteration of technology, the experience of using eyeglass frames is required to be higher. In order to improve the wearer's visual experience, especially for the problems of eye dryness and visual fatigue caused by long-term use of eyes, the main improvement methods proposed include: setting up space in the eyeglass frame to place volatile liquid, or embedding adsorption blocks that can absorb liquid in the temple box groove, and releasing volatile substances through the volatile holes on the inside of the temple, so as to alleviate the eye dryness and visual fatigue caused by long-term use of eyes.

[0003] However, current improvement methods generally have the problems of small liquid storage and rapid volatilization, which leads to frequent replacement of liquid or adsorption block, and the concentration of liquid leads to limited range of action, which affects its actual application effect. Summary of the invention

[0004] In order to solve the above problems, the present application provides an organic composite material, a preparation method and its application in eyeglass frame plates. The volatile essential oil components that can relieve visual fatigue in the traditional Chinese medicine composition are first obtained by steam distillation, and the compound essential oil is extracted and mixed with polylactic acid resin to make an organic composite material. The eyeglass frame made of the organic composite material as a constituent raw material has the function of sustained-release natural traditional Chinese medicine extracts (i.e., compound essential oils) and relieving visual fatigue. It effectively solves the problem of limited range of action caused by concentrated liquid medicine, and does not require frequent replacement of liquid medicine or adsorption blocks, further enhancing its actual application effect.

[0005] In a first aspect, the present application provides an organic composite material, wherein the organic composite material is composed of a porous polylactic acid resin as a carrier and a loaded compound essential oil; The compound essential oil is extracted from a traditional Chinese medicine composition, which is composed of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle in any mass ratio; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

[0006] Furthermore, the polylactic acid resin is poly-L-lactic acid resin or poly-D-lactic acid resin.

[0007] Furthermore, the particle size of the polylactic acid resin is 95 μm-105 μm, and the specific surface area is 13.5 m 2 / g-14.5m 2 / g, pore size is 41 nm-43 nm.

[0008] Furthermore, in the traditional Chinese medicine composition, the mass percentages of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle are (11-15)%: (11-24)%: (11-24)%: (9-18)%: (11-15)%: (4-12)%: (4-6)%: (5-10)%.

[0009] In a second aspect, the present application provides a method for preparing the above-mentioned organic composite material, the preparation method comprising: After the lactic acid solution is mixed with a catalyst, an initiator and a plasticizer, a polycondensation reaction is carried out in an inert atmosphere of 100°C-130°C and 20 kPa-40 kPa to crystallize and precipitate polylactic acid resin; Adding compound essential oil to the polylactic acid resin, stirring for 12 h to 24 h at 150° C. to 200° C. and below 10 kPa, so that the compound essential oil is loaded in the pores of the polylactic acid resin to form an organic composite material; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

[0010] Furthermore, the addition rate of the compound essential oil is 90 mL / min-110 mL / min.

[0011] Further, the catalyst is a tin-containing catalyst; The mass volume ratio of the catalyst to the lactic acid solution is 1: (40-60) mg / L.

[0012] Further, the initiator is any one of decanol, polydecanol, tetradecanol, hexadecanol and octadecyl alcohol; The plasticizer is any one of polyethylene glycol, propylene glycol and polycaprolactone.

[0013] Furthermore, the method for extracting the compound essential oil comprises: Take appropriate amounts of angelica, codonopsis, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle, wash and crush, add excess distilled water to the mixed powder obtained by filtration, soak for 2 h-4 h, then heat and distill, and collect the distillate; Adding an extractant to the filtered distillate, letting it stand for stratification and taking the upper layer to obtain the compound essential oil; The extractant is any one of ether, benzene, chloroform, petroleum ether, n-hexane, cyclohexane and ethyl acetate; The volume of the distilled water is 7 to 12 times the volume of the mixed powder.

[0014] In a third aspect, the present application provides an application of the above-mentioned organic composite material in eyeglass frame plates, wherein the organic composite material is used as a constituent raw material of the eyeglass frame plates to prepare eyeglass frames.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application provides an organic composite material, which is composed of a porous polylactic acid resin as a carrier and a loaded compound essential oil. The porous structure greatly increases the loading capacity of the compound essential oil. Compared with the traditional method, it can store more compound essential oil and solve the problem of small storage capacity of the medicine solution. The material has better sustained-release properties, which can realize continuous and stable release of the compound essential oil, effectively prolong the action time of the compound essential oil and avoid frequent replacement of the medicine solution or adsorption block. The compound essential oil can be evenly distributed through the porous structure of the polylactic acid resin, thereby achieving a wider range of action, greatly improving the utilization rate of the compound essential oil and enhancing the effect of relieving eye dryness and visual fatigue. The compound essential oil is extracted from a Chinese medicine composition such as angelica, codonopsis, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle. These ingredients can produce a synergistic effect and have better effects of improving eyesight, clearing the liver and relieving eye fatigue. 2. The present application provides a method for preparing an organic composite material, wherein a lactic acid solution is mixed with a catalyst, an initiator and a plasticizer, and the temperature and pressure of the polycondensation reaction are controlled to achieve efficient preparation of a polylactic acid resin in an inert atmosphere. The generated polylactic acid resin has a porous structure, which provides a good carrier for subsequent loading of a compound essential oil. The compound essential oil is then fully infiltrated into the pores of the polylactic acid resin by stirring, thereby achieving efficient loading of the compound essential oil. The preparation method is simple and efficient, and can be widely applied to the production of polylactic acid resins at all levels. 3. The present application provides an application of an organic composite material in eyeglass frame plates. The organic composite material can be used as a constituent raw material of the eyeglass frame plates to prepare an eyeglass frame that can be used as a whole to sustain the release of a compound essential oil extracted from a natural Chinese medicine composition and relieve visual fatigue, thereby expanding the sustained-release range and effectively solving problems such as rapid volatilization of the drug solution and limited range of action. The eyeglass frame has the advantages of being lightweight and low-cost due to its constituent raw materials, and also has excellent plasticity, stability, safety, impact resistance and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1The flowchart of the method for preparing the organic composite material proposed in the embodiment of the present application is shown; Figure 2 The flowchart of the method for extracting compound essential oil proposed in the embodiment of the present application is shown; Figure 3 The microscopic SEM images of the particles before and after the polylactic acid resin loaded with the compound essential oil provided in Example 1 of the present application are shown; Figure 4 shows the infrared spectrum of the organic composite material proposed in Example 1 of the present application; Figure 5 The thermogravimetric curve of the organic composite material proposed in Example 1 of the present application is shown; Figure 6 The sustained release rate diagram of the organic composite material proposed in Example 1 of the present application is shown. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In the drawings, the size of the constituent elements, the thickness of the layer or the area may be exaggerated for the sake of clarity. Therefore, any implementation of the present disclosure is not necessarily limited to the size shown in the drawings, and the shapes and sizes of the components in the drawings do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and any implementation of the present disclosure is not limited to the shapes or values ​​shown in the drawings.

[0020] In the related art, in the field of eyeglass frame technology, in order to improve the wearer's visual experience, especially to address the problems of eye soreness and visual fatigue caused by long-term use of the eyes, some improvement plans have been proposed.

[0021] For example, patent CN209060339U discloses a solution of setting up space in the eyeglass frame to place volatile liquid medicine, which can relieve eye dryness and visual fatigue by volatilization of liquid medicine, and has the advantage of being recyclable. However, this design has the problem of small liquid medicine storage and fast volatilization, which leads to frequent replacement of liquid medicine, and the concentration of liquid medicine leads to limited scope of action, which affects its actual application effect; Patent CN208984903U discloses a pair of glasses that can volatilize substances near the temples, in which an adsorption block that can absorb liquid is embedded in the box groove of the temple, and a number of volatilization holes are opened on the inner side of the temple, and the volatilization holes are connected to the box groove. This solution has a simple structure and is relatively low in cost, but the liquid adsorption block has a limited number of cycles, the absorption amount is small, and the volatile substances are unclear.

[0022] In view of the shortcomings of the above-mentioned related technologies, the embodiment of the present application proposes an inventive concept: extracting compound essential oils from natural Chinese medicine ingredients that can relieve visual fatigue and dryness, and mixing the compound essential oils with polylactic acid resin to make an organic composite material that can be directly used to prepare eyeglass frames. In this way, not only can the entire eyeglass frame be used to load the compound essential oils, solving the problem of low liquid loading, but any position on the eyeglass frame can slowly release and volatilize the compound essential oils, greatly increasing the scope of action and further enhancing the effect of relieving eye fatigue when the eyeglass frame is used.

[0023] The present application provides an organic composite material, which is composed of a porous polylactic acid resin as a carrier and a loaded compound essential oil; The compound essential oil is extracted from a traditional Chinese medicine composition, which is composed of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle mixed in any mass ratio; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

[0024] In specific implementation, the polylactic acid resin selected in the embodiment of the present application first has the characteristics of being mild to the skin, strong stability, high plasticity, and excellent comfort; secondly, it also has excellent adsorption and sustained release properties, and can effectively load the compound essential oil and control its volatilization rate, thereby extending the action time of the essential oil. As a biodegradable material, polylactic acid resin can be decomposed by microorganisms in the natural environment, so using this material as a carrier is more environmentally friendly and sustainable, and is more in line with the current social requirements for environmental protection and sustainable development.

[0025] Based on the porous structure of polylactic acid resin, the compound essential oil can be more evenly distributed inside the polylactic acid resin and slowly released through the tiny pores of the polylactic acid resin, thereby expanding the scope of action and improving the material's effect in alleviating eye dryness and visual fatigue.

[0026] In specific implementation, the components of the traditional Chinese medicine composition can be mixed in any mass ratio, so it can be customized according to the needs and physiques of different wearers, increasing the flexibility and applicability of the organic composite material when used.

[0027] In some embodiments, the mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (40-80) kg / mL.

[0028] In specific implementation, every 1 kg of polylactic acid resin is compounded with (40-800) mL of compound essential oil, and the obtained organic composite materials have good sustained-release effect and the effect of relieving eye fatigue and dryness. The specific ratio can be further adjusted according to the sustained-release time, the user's physical condition, etc.

[0029] In some embodiments, the polylactic acid resin is poly-L-lactic acid resin or poly-D-lactic acid resin.

[0030] Both poly-L-lactic acid resin and poly-D-lactic acid resin have good biocompatibility, and the interaction between them and human tissue is mild, and it is not easy to cause allergic reactions or rejection reactions, which can ensure the comfort and safety of the wearer. Poly-L-lactic acid resin and poly-D-lactic acid resin also have sufficient strength and toughness to meet the use requirements of eyeglass frames. Their porous structure can well load compound essential oils and slowly release them through tiny pores, thereby ensuring the uniform distribution and lasting effect of the essential oils.

[0031] In some embodiments, the polylactic acid resin has a particle size of 95 μm-105 μm and a specific surface area of ​​13.5 m 2 / g-14.5 m 2 / g, pore size is 41 nm-43 nm.

[0032] In specific implementation, when the polylactic acid resin is used to load the compound essential oil, by limiting the physical properties such as particle size, it is beneficial to the uniform loading and stable release of the compound essential oil. Among them, the pore size is moderate, which can allow the effective ingredients of the compound essential oil to penetrate into the resin interior, and can be slowly released when needed to extend the action time. Further, by adjusting the pore size and specific surface area of ​​the polylactic acid resin, the release rate of the compound essential oil can be accurately controlled and the release time can be extended as much as possible.

[0033] In some embodiments, in the traditional Chinese medicine composition, the mass percentages of angelica, codonopsis, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle are (11-15)%: (11-24)%: (11-24)%: (9-18)%: (11-15)%: (4-12)%: (4-6)%: (5-10)%.

[0034] In specific implementation, by limiting the proportion of each Chinese herbal ingredient in the compound essential oil, the various ingredients can produce a better synergistic effect and work together to improve eye health, relieve eye fatigue and dryness. Even if used for a long time, high safety and mildness can be guaranteed, so that the compound essential oil can be better suitable for different groups of people and eye needs.

[0035] The present invention provides a method for preparing an organic composite material, the method comprising: Step S1: After mixing the lactic acid solution with the catalyst, the initiator and the plasticizer, a polycondensation reaction is carried out in an inert atmosphere of 100°C-130°C and 20kPa-40kPa to crystallize the polylactic acid resin; Step S2: adding the compound essential oil to the polylactic acid resin, stirring for 12 h to 24 h at 150 ° C to 200 ° C and below 10 kPa, so that the compound essential oil is loaded in the pores of the polylactic acid resin to form an organic composite material; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

[0036] In specific implementation, the embodiment of the present application adopts the direct polymerization method of lactic acid dehydration condensation to prepare polylactic acid resin, mix lactic acid solution, catalyst, initiator and plasticizer, and control the reaction conditions (100 ℃-130 ℃, 20 kPa-80kPa inert atmosphere) to more efficiently carry out polycondensation reaction, promote the crystallization of polylactic acid resin, and more importantly, ensure that it forms a porous structure during the preparation process, and provide a porous carrier for the subsequent loading of compound essential oil. Then, under specific temperature and pressure conditions, by long-term stirring, the compound essential oil can fully penetrate and load in the pores of polylactic acid resin, and the compound essential oil can be stably and persistently volatilized in polylactic acid resin during subsequent use. By loading the compound essential oil, new functionality is given to polylactic acid resin, so that it has the functions of aroma release and antibacterial preservation (realized by the compound essential oil), which broadens its application field.

[0037] In summary, this preparation method achieves the preparation of efficient, environmentally friendly, and functional organic composite materials by optimizing the preparation of polylactic acid resin and the loading process of compound essential oil, and has broad application prospects.

[0038] In specific implementation, the lactic acid solution is a precursor for preparing the polylactic acid resin, which can be L-lactic acid or D-lactic acid.

[0039] In specific implementation, the inert gas used in the inert atmosphere is nitrogen or argon to exclude oxygen and other active gases from the environment, protect the organic composite material from oxidation damage, and extend its service life.

[0040] In specific implementation, the mass-to-volume ratio is controlled to adjust the performance of the organic composite material to meet different application requirements. For example, as the content of the compound essential oil increases, the flexibility of the polylactic acid resin filled with the compound essential oil increases.

[0041] In some embodiments, the polycondensation reaction can be carried out in a known reactor, such as a batch, continuous or semi-batch reactor, for example, a vertical reactor or a horizontal reactor using a high viscosity stirring blade such as a spiral ribbon wing.

[0042] In some embodiments, the polylactic acid resin can be prepared by melt ring polymerization of L-lactic acid or D-lactic acid. In specific implementation, in the melt ring polymerization of lactam, from the perspective of preparation efficiency and polymer quality, metal catalysts are preferred, such as tin-containing catalysts, preferably II-valent tin compounds. The amount of catalyst used is preferably 0.1×10 -4 mol-50×10 -4 In order to effectively remove the water generated by the reaction, it is also preferable to use a method of circulating a heated inert gas inside the reduced pressure reaction container.

[0043] In some embodiments, step S1 specifically includes: First, nitrogen is introduced to exhaust the air in the reactor, a catalyst, an initiator and a plasticizer are added to an appropriate amount of lactic acid solution, and the mixture is transferred to a reactor, and a polycondensation reaction is carried out in an inert atmosphere of 100°C-130°C and 20 kPa-40 kPa for 4 h-8 h, and the mixture begins to crystallize to obtain a granular polylactic acid resin; Among them, the reactor is preferably a fixed vertical or horizontal reaction container.

[0044] In some embodiments, the addition rate of the compound essential oil is 90 mL / min-110 mL / min. By controlling the addition rate of the compound essential oil, it is helpful to accurately control the total addition amount of the compound essential oil.

[0045] In some embodiments, the catalyst is a tin-containing catalyst; The mass volume ratio of the catalyst to the lactic acid solution is 1: (40-60) mg / L.

[0046] In specific implementation, the tin-containing catalyst used has higher catalytic activity in the polycondensation reaction of polylactic acid, can significantly reduce the activation energy of the reaction, accelerate the esterification reaction between lactic acid molecules, and improve production efficiency.

[0047] In specific implementation, the tin-containing catalyst is any one of diethoxytin, tin pyrimidine acid, tin octanoate and tin stearate. The catalyst can also be caprolactam.

[0048] In some embodiments, the initiator is any one of decanol, polydecanol, tetradecanol, hexadecanol, and stearyl alcohol; The plasticizer is any one of polyethylene glycol, propylene glycol and polycaprolactone.

[0049] In a specific implementation, the selected alcohol will not hinder the polymerization of the polylactic acid resin, has non-volatility, and helps to improve the polymerization effect.

[0050] In some embodiments, the method for extracting the compound essential oil comprises: Step S11: taking appropriate amounts of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle, washing and crushing them, adding excess distilled water to the mixed powder obtained by filtration, soaking for 2 h-4 h, and then heating and distilling, and collecting the distillate; Step S12: adding an extractant to the filtered distillate, standing and separating the layers, and taking the upper layer to obtain the compound essential oil; The extractant is any one of ether, benzene, chloroform, petroleum ether, n-hexane, cyclohexane and ethyl acetate; The volume of distilled water is 7 to 12 times the volume of the mixed powder.

[0051] In specific implementation, the embodiment of the present application adopts a steam distillation method, which utilizes the carrying effect of water vapor to effectively extract the volatile components in the mixed powder. It is not only easy to operate and has high extraction efficiency, but also ensures the full release of essential oil components. The steam distillation method has better mildness and avoids the damage to the components of traditional Chinese medicine by extreme conditions such as high temperature and high pressure or strong acid and strong alkali. Adding excess distilled water and soaking it helps to fully dissolve and diffuse the essential oil components in the powder, further improving the extraction efficiency; The use of organic solvents such as ether, benzene, chloroform, petroleum ether, n-hexane, cyclohexane or ethyl acetate as extractants is due to their good selectivity and high extraction efficiency, which can achieve efficient extraction.

[0052] An embodiment of the present application provides an application of the organic composite material in a spectacle frame plate material. The organic composite material is used as a constituent raw material of the spectacle frame plate material to prepare a spectacle frame.

[0053] The organic composite material prepared in the embodiment of the present application has the characteristics of being porous and having a high specific surface area, and can slowly release the active components of traditional Chinese medicine (i.e., compound essential oil). The organic composite material is used as a component raw material of the eyeglass frame, and the prepared eyeglass frame also has the effect of slowly releasing the active components of traditional Chinese medicine (i.e., compound essential oil), and can relieve eye fatigue and dryness when worn, and enhance the comfort of using the eyeglass frame.

[0054] In specific implementation, when preparing eyeglass frames with organic composite materials, the organic composite materials can be formed by injection molding, hot blow molding or foaming to obtain the desired frame shape, and then further refined and cut to produce frame components for glasses.

[0055] In specific implementation, when the injection molding process is adopted, the specific process steps include: A special mold injection molding machine is used, the power is turned on, the organic composite material is put into the hopper as the raw material, the switch on the control panel is turned on, and the granular organic composite material flows from the hopper into the syringe. The syringe first heats the granular organic composite material into liquid, and then injects the liquid material into the gap between the frame sub-mold and the frame mother mold. After the injection, the frame sub-mold is separated from the frame mother mold, and the fan blades rotate to cool the outer shell to shape the material, and the glasses frame is obtained after fine polishing.

[0056] In order to enable those skilled in the art to more clearly understand the present invention, the organic composite material, preparation method and application of the organic composite material in the present invention are described in detail through the following examples.

[0057] Example 1 (1) Preparation of a compound essential oil: 1) Accurately weigh 10 g of angelica sinensis, 10 g of codonopsis pilosula, 10 g of cassia seed, 15 g of raspberry, 10 g of wolfberry, 10 g of honeysuckle, 5 g of mint and 5 g of taurine, and mix them to form a traditional Chinese medicine composition; 2) Wash the Chinese medicine composition and then crush it, pass it through an 80-100 mesh sieve to obtain a mixed powder, add excess distilled water to the mixed powder, the volume of the distilled water is 10 times that of the mixed powder, soak it at room temperature for 3 hours, then heat it to boiling, perform steam distillation, collect the distillate, filter the distillate with a 0.22 μm filter membrane, and obtain the Chinese medicine composition extract; 3) Add ether to the extract of the Chinese medicine composition, extract in a separatory funnel, let stand for 36 hours, take the upper liquid, add anhydrous sodium sulfate to dry and recover the ether. The remaining liquid is a light yellow transparent oily liquid with a special smell, that is, the compound essential oil.

[0058] (2) Preparation of an organic composite material: 1) Nitrogen was introduced into the vertical reactor to exhaust the air in the reactor, and then 1 L of lactic acid solution (lactic acid content 80%) was added into the reactor, and then 50 mg of stannous octoate, 10 mg of hexadecanol and 5 mg of propylene glycol were added into the reactor and mixed with the lactic acid solution; 2) The temperature in the reactor was adjusted to 125°C and the pressure was adjusted to 25 kPa. The obtained mixture was subjected to dehydration polycondensation in the reactor for 6 hours to crystallize the mixture and precipitate polylactic acid resin particles; 3) Then, the compound essential oil was added to the obtained polylactic acid resin particles at a rate of 100 mL / min for 5 min, and then the pressure in the reactor was gradually reduced to 10 kPa, and the reaction was continued at this pressure, and then the temperature in the reactor was raised to 180 °C and stirred for 20 h to load the compound essential oil into the pores of the granular polylactic acid resin; 4) After cooling, the obtained product was dissolved in acetone, and then methanol was added to precipitate the product, which was then washed with distilled water and dried under vacuum at 50 °C for 6 h to obtain an organic composite material.

[0059] Based on Example 1, Figure 3 The microscopic SEM images of the particles before and after the polylactic acid resin loaded with the compound essential oil provided in Example 1 of the present application are shown. In the figure, Figure 3 (a) shows the microstructure of the polylactic acid resin before loading the compound essential oil. Figure 3 (b) shows the microstructure of polylactic acid resin after loading the compound essential oil.

[0060] according to Figure 3 It can be seen that the polylactic acid resin has a porous structure, the compound essential oil is loaded in its pores, and part of the compound essential oil is also impregnated on the surface of the polylactic acid resin, indicating that Example 1 of the present application uses the polylactic acid resin as a carrier to load the compound essential oil, and utilizes its porous structure to achieve the effect of sustained release of the compound essential oil.

[0061] Since the compound essential oil is more distributed in the pores of the polylactic acid resin, only a small part is impregnated on the surface of the polylactic acid resin, so the organic composite material does not produce a sticky feeling when used. Further, when the organic composite material is used to prepare eyeglass frames, physical means such as grinding and polishing can be used to further remove the compound essential oil on the surface of the polylactic acid resin to enhance the comfort when wearing. Since the compound essential oil is less distributed on the surface, the loss caused by grinding does not affect the effect of the compound essential oil in relieving eye fatigue and dryness.

[0062] See also Figure 4 , Figure 4 The infrared spectrum of the organic composite material proposed in Example 1 of the present application is shown. Figure 4 (1) indicates lutein, Figure 4 The (2) in the figure represents taurine.

[0063] from Figure 4 It can be seen that the organic composite material contains natural compounds such as lutein and taurine that can relieve visual fatigue. This indicates that the material provided in Example 1 of the present application can relieve eye fatigue and dryness when used, and can increase the comfort of the user's eyes.

[0064] Example 2 (1) Preparation of a compound essential oil: 1) Accurately weigh 10 g of angelica sinensis, 10 g of codonopsis pilosula, 10 g of cassia seed, 15 g of raspberry, 10 g of wolfberry, 10 g of honeysuckle, 5 g of mint and 5 g of taurine, and mix them to form a traditional Chinese medicine composition; 2) Wash the Chinese medicine composition and crush it, pass it through an 80-100 mesh sieve to obtain a mixed powder, add excess distilled water to the mixed powder, the volume of the distilled water is 7 times that of the mixed powder, soak it at room temperature for 2 hours, then heat it to boiling, perform steam distillation, collect the distillate, filter the distillate with a 0.22 μm filter membrane, and obtain the Chinese medicine composition extract; 3) Add n-hexane to the extract of the Chinese medicine composition, extract in a separatory funnel, let stand for 12 hours, take the upper liquid, add anhydrous sodium sulfate to dry and recover the ether. The remaining liquid is a light yellow transparent oily liquid with a special smell, that is, the compound essential oil.

[0065] (2) Preparation of an organic composite material: 1) Nitrogen was introduced into the vertical reactor to exhaust the air in the reactor, and then 1 L of lactic acid solution (lactic acid content 80%) was added into the reactor, and then 40 mg of stannous octoate, 8 mg of octadecyl alcohol and 5 mg of propylene glycol were added into the reactor and mixed with the lactic acid solution; 2) The temperature in the reactor was adjusted to 100°C and the pressure was adjusted to 20 kPa. The obtained mixture was subjected to dehydration polycondensation in the reactor for 6 hours to crystallize the mixture and precipitate polylactic acid resin particles; 3) Then, the compound essential oil was added to the obtained polylactic acid resin particles at a rate of 110 mL / min for 1 min, and then the pressure in the reactor was gradually reduced to 10 kPa, and the reaction was continued at this pressure, and then the temperature in the reactor was raised to 150 °C and stirred for 20 h to load the compound essential oil into the pores of the granular polylactic acid resin; 4) After cooling, the obtained product was dissolved in acetone, and then methanol was added to precipitate the product, which was then washed with distilled water and dried under vacuum at 50 °C for 6 h to obtain an organic composite material.

[0066] Example 3 (1) Preparation of a compound essential oil: 1) Accurately weigh 15 g of angelica sinensis, 25 g of codonopsis pilosula, 25 g of cassia seed, 10 g of raspberry, 15 g of wolfberry, 5 g of honeysuckle, 5 g of mint and 10 g of taurine, and mix them to form a traditional Chinese medicine composition; 2) Wash the Chinese medicine composition and crush it, pass it through an 80-100 mesh sieve to obtain a mixed powder, add excess distilled water to the mixed powder, the volume of the distilled water is 12 times that of the mixed powder, soak it at room temperature for 4 hours, then heat it to boiling, perform steam distillation, collect the distillate, filter the distillate with a 0.22 μm filter membrane, and obtain the Chinese medicine composition extract; 3) Add ethyl acetate to the extract of the Chinese medicine composition, extract in a separatory funnel, let stand for 48 hours, take the upper liquid, add anhydrous sodium sulfate to dry and recover the ether, the remaining liquid is a light yellow transparent oily liquid with a special smell, that is, the compound essential oil.

[0067] (2) Preparation of an organic composite material: 1) Nitrogen was introduced into the vertical reactor to exhaust the air in the reactor, and then 1L of lactic acid solution (lactic acid content 80%) was added into the reactor, and then 60 mg of stannous octoate, 12 mg of octadecyl alcohol and 5 mg of polyethylene glycol were added into the reactor and mixed with the lactic acid solution; 2) The temperature in the reactor was adjusted to 130°C and the pressure was adjusted to 40 kPa. The obtained mixture was subjected to dehydration polycondensation in the reactor for 6 hours to crystallize the mixture and precipitate polylactic acid resin particles; 3) Then, the compound essential oil was added to the obtained polylactic acid resin particles at a rate of 90 mL / min for 10 min, and then the pressure in the reactor was gradually reduced to 10 kPa, and the reaction was continued at this pressure, and then the temperature in the reactor was raised to 200 °C and stirred for 24 h to load the compound essential oil into the pores of the granular polylactic acid resin; 4) After cooling, the obtained product was dissolved in acetone, and then methanol was added to precipitate the product, which was then washed with distilled water and dried under vacuum at 50 °C for 6 h to obtain an organic composite material.

[0068] Experimental example The organic composite material prepared in Example 1 was used as an object to conduct a method for detecting volatile components in the sustained-release compound essential oil of the organic composite material. The instrument involved in the experiment was a tandem TGA-GC / MS. The particle size of the organic composite material used in the experiment was uniform and not larger than 20 meshes.

[0069] The specific steps are as follows: Step 1: Fill the TGA with nitrogen, helium, or a mixture of any of the above gases and oxygen, or air, and set the gas flow rate to 20 mL / min; Step 2, set the TGA to heat from the initial temperature state to any temperature T, where room temperature < T < 50 °C, and keep it at a constant temperature under the temperature condition of T, and set the temperature heating rate to 10 °C / min; the temperature heating rate refers to the temperature and running time of the gas sample collection of the GC / MS experiment, and the time of the gas sample collection of the adjacent GC / MS experiments is greater than the running time of the GC / MS experiment separation and detection; Step 3: Collect the thermogravimetric curve and draw a thermogravimetric curve diagram. Figure 5 ; Step 4, collecting gas samples for GC / MS experiments; (1) The gas sample for GC / MS experiment is the gas generated by TGA operation at temperature T, which is collected; (2) Setting GC / MS parameters, including chromatographic conditions and mass spectrometry conditions; the chromatographic conditions include: setting the chromatographic column to a weak polarity column, setting the carrier gas to helium, using constant flow mode to fill the carrier gas, and setting the carrier gas flow rate to 1.0 mL / min; setting the chromatographic temperature program, which is to heat to 30 °C and hold for 5 min, then heat to 280 °C at 10 °C / min and hold for 1 min-10 min; the mass spectrometry conditions are to set the transmission line temperature to 250 °C, set the EI ion source temperature to 250 °C, set the ionization energy to 50 eV, and set the scanning range to 10 amu-500 amu; (3) Scan the sample, measure the peak area, and calculate the content of the active component of the Chinese medicine extract of the sample based on the average value of the peak area repeated three times; (4) The particle samples were sealed and measured, and the measurements were repeated every 10 days. The gas chromatographic peak areas of the samples were recorded. The experiment lasted for 100 days. Figure 6 .

[0070] according to Figure 6 It can be obtained that the organic composite material provided in Example 1 of the present application has the effect of slow-release of the compound essential oil, and after 100 days of slow release, it still has a slow-release rate of more than 45%, which can achieve more efficient and lasting volatilization of the compound essential oil. The preparation of eyeglass frames using this material can be achieved only by physical means, so the slow-release effect of the material itself will not be changed, and the prepared eyeglass frames have at least the same slow-release rate as the organic composite material.

[0071] In summary, the present application provides an organic composite material, a preparation method and its application in eyeglass frame plates. First, a volatile essential oil component that can relieve visual fatigue in a preferred Chinese medicine composition is obtained by steam distillation to obtain a compound essential oil, which is then mixed with a polylactic acid resin to prepare an organic composite material that can be used for sustained-release natural Chinese medicine extracts and relieve visual fatigue. The organic composite material can be directly used to prepare eyeglass frames. This solution not only solves the problems of small liquid medicine storage, fast volatilization, and limited scope of action, but also improves the practicality and comfort of eyeglass frames by selecting volatile oil components of Chinese medicine with a clear effect of relieving visual fatigue. At the same time, polylactic acid is used as a substrate, so that the eyeglass frame has excellent plasticity, stability, safety, impact resistance and comfort, meeting the diverse needs of the wearer.

[0072] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0073] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0074] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0075] The above is a detailed introduction to an organic composite material, a preparation method and its application in eyeglass frame plates provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An organic composite material, characterized in that: The organic composite material is composed of a porous polylactic acid resin as a carrier and a loaded compound essential oil; The compound essential oil is extracted from a traditional Chinese medicine composition, which is composed of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle mixed in any mass ratio; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

2. The organic composite material according to claim 1, characterized in that: The polylactic acid resin is poly-L-lactic acid resin or poly-D-lactic acid resin.

3. The organic composite material according to claim 1, characterized in that: The particle size of the polylactic acid resin is 95 μm-105 μm and the specific surface area is 13.5 m 2 / g-14.5 m 2 / g, pore size is 41 nm-43 nm.

4. The organic composite material according to claim 1, characterized in that: In the traditional Chinese medicine composition, the mass percentages of angelica sinensis, codonopsis pilosula, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle are (11-15)%: (11-24)%: (11-24)%: (9-18)%: (11-15)%: (4-12)%: (4-6)%: (5-10)%.

5. A method for preparing the organic composite material according to any one of claims 1 to 4, characterized in that: The preparation method comprises: After the lactic acid solution is mixed with a catalyst, an initiator and a plasticizer, a polycondensation reaction is carried out in an inert atmosphere of 100°C-130°C and 20 kPa-40 kPa to crystallize and precipitate polylactic acid resin; Adding compound essential oil to the polylactic acid resin, stirring for 12 h to 24 h at 150° C. to 200° C. and below 10 kPa, so that the compound essential oil is loaded in the pores of the polylactic acid resin to form an organic composite material; The mass volume ratio of the polylactic acid resin to the compound essential oil is 1: (20-100) kg / mL.

6. The method for preparing the organic composite material according to claim 5, characterized in that: The addition rate of the compound essential oil is 90 mL / min-110 mL / min.

7. The method for preparing the organic composite material according to claim 5, characterized in that: The catalyst is a tin-containing catalyst; The mass volume ratio of the catalyst to the lactic acid solution is 1: (40-60) mg / L.

8. The method for preparing the organic composite material according to claim 5, characterized in that: The initiator is any one of decanol, polydecanol, tetradecanol, hexadecanol and octadecyl alcohol; The plasticizer is any one of polyethylene glycol, propylene glycol and polycaprolactone.

9. The method for preparing the organic composite material according to claim 5, characterized in that: The extraction method of the compound essential oil comprises: Take appropriate amounts of angelica, codonopsis, cassia seed, raspberry, wolfberry, mint, taurine and honeysuckle, wash and crush, add excess distilled water to the mixed powder obtained by filtration, soak for 2 h-4 h, then heat and distill, and collect the distillate; Adding an extractant to the filtered distillate, letting it stand for stratification and taking the upper layer to obtain the compound essential oil; The extractant is any one of ether, benzene, chloroform, petroleum ether, n-hexane, cyclohexane and ethyl acetate; The volume of the distilled water is 7 to 12 times the volume of the mixed powder.

10. Use of the organic composite material according to any one of claims 1 to 4 in eyeglass frame plates, characterized in that: The organic composite material is used as a raw material for glasses frame plates to prepare glasses frames.

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