CN112592458B - Polyurethane sponge with fragrance releasing and sleep aiding functions - Google Patents
Polyurethane sponge with fragrance releasing and sleep aiding functions Download PDFInfo
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- CN112592458B CN112592458B CN202011468820.5A CN202011468820A CN112592458B CN 112592458 B CN112592458 B CN 112592458B CN 202011468820 A CN202011468820 A CN 202011468820A CN 112592458 B CN112592458 B CN 112592458B
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- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
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- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
Abstract
The invention discloses a polyurethane sponge with fragrance releasing and sleep aiding functions. The polyurethane sponge is polymerized by isocyanate and polyether glycol, beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin inclusion compound of lavender and chamomile essential oil and chitosan microcapsule are added during the processing of the polyurethane sponge, and the capsule core of the chitosan microcapsule is a compound of extracts of lavender and chamomile. The invention has the advantages that: the preparation method comprises the steps of taking extracts of lavender and chamomile which are plant-derived and have the sleep-aiding effect as core materials, taking natural antibacterial chitosan and starch decomposition products with cavity nests and deodorization functions as wall materials, preparing microcapsules with slow release property, adding the prepared microcapsules and the nests inclusion compound into a polymerization monomer of polyurethane sponge, and enabling active groups to participate in polymerization reaction of the polyurethane sponge to prepare the apple aromatic polyurethane sponge with the slow release of the lavender and the chamomile, wherein the polyurethane sponge has the excellent performance of long-acting fragrance release and sleep-aiding.
Description
Technical Field
The invention relates to the technical field of household products, in particular to a polyurethane sponge with fragrance releasing and sleep aiding functions.
Background
The polyurethane sponge is low-density PU with the foam density lower than 18kg/m3, and the memory sponge belongs to one of the polyurethane sponges. The main technologies for producing polyurethane sponge at present are negative pressure foaming technology, forced cooling technology and liquid carbon dioxide foaming technology. The polyurethane sponge has the characteristics of polyether sponge, acid and alkali resistance, moisture resistance, wear resistance, corrosion resistance, heat resistance, good stretchability and the like, has the characteristics of uniform pores, good glossiness, high bonding rate with a composite textile fabric and the like, and is widely applied to the industries of high-grade vehicle interior trim, high-grade composite materials, flocked cloth, skin care products, printer consumables, filtration and the like.
The polyurethane sponge applied to the field of household can be made into household articles such as mattresses, pillows and the like. The sleeping quality is not good, which not only affects the health, but also reduces the learning efficiency of the next day. The sleeping quality is related to the physical properties of bedding, and the influence of mental factors on sleeping is large, particularly the rhythm of learning and working in the current society is fast and the pressure is large. Some plant essential oils have the function of relaxing and relaxing nervous tension, but if incense or massage is carried out before sleeping every day, the operation is troublesome, and a large amount of precious time is wasted, which is unrealistic for modern staff. Therefore, the polyurethane sponge which can slowly release the fragrance capable of helping sleep when a human body presses on the polyurethane sponge is urgently needed to be developed so as to meet the requirements of household articles such as mattresses, pillows and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polyurethane sponge with fragrance releasing and sleep aiding functions, and the polyurethane sponge can solve the problems that at present, a consumer is troublesome and wastes time by essential oil fragrance or massage before sleeping to aid sleep.
In order to solve the technical problems, the technical scheme of the invention is as follows: a polyurethane sponge with fragrance-releasing and sleep-aiding functions is polymerized by isocyanate and polyether polyol, beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds and chitosan microcapsules are further added in the polymerization process of the polyurethane sponge, and capsule cores of the chitosan microcapsules are compounds of extracts of lavender and chamomile; the polyurethane sponge comprises the following components in parts by weight: 90-110 parts of polyether polyol, 30-70 parts of MDI (diphenylmethane diisocyanate) or TDI (toluene diisocynate), 0-0.5 part of chain extender, 0.5-5 parts of high-efficiency foam stabilizer, 0.1-1 part of high-efficiency composite catalyst, 0-6 parts of external foaming agent, 1-5 parts of water, 0.2-0.5 part of beta-CD (beta-CD) cyclodextrin lavender and chamomile essential oil inclusion compound and 0.2-0.5 part of chitosan microcapsule.
Further, the compound ratio of the extracts of the lavender and the chamomile is 1-3: 1.
Further, the chain extender is a polyol or diamine low molecular compound, the high-efficiency foam stabilizer is an organic silicon foam stabilizer or a polysiloxane-polyoxyalkylene mosaic copolymer, the high-efficiency composite catalyst is a tin catalyst or an amine catalyst, the external foaming agent is a physical foaming agent used in polyurethane foaming, and the polyether polyol is polyether used in polyurethane foaming.
Further, the preparation method of the chitosan microcapsule comprises the following steps:
s1, weighing chitosan with the molecular weight of 3-5 ten thousand and the mass of 1g, dissolving the chitosan in a 1% acetic acid solution, and preparing a 1% chitosan acetic acid solution;
s2, weighing 0.5g of emulsifier, wherein the weight of the emulsifier is 0.25g of span 80 and 0.25g of Tween 80, adding 50mL of distilled water, emulsifying at high speed, slowly adding a compound of lavender and chamomile extracts, and mixing the materials according to a ratio of capsule core to wall material of 1: 1, adding 1g of compound essential oil, and emulsifying at a high speed of 10000r/min for 15 min;
s3, adding the essential oil emulsion into the chitosan acetic acid solution obtained in the step S1 under the condition of mechanical stirring, wherein the stirring temperature is 50 ℃, the stirring speed is 1000r/min, and the stirring time is 30 min;
s4, adding 40ml of 2% sodium sulfate in the step S3, and flocculating for 20min at the rotating speed of 500 r/min;
S5, rapidly cooling the solution obtained in the step S4 through an ice-water bath, adjusting the pH to 9 through 10% sodium hydroxide, adding 0.1mL of 25% glutaraldehyde serving as a curing agent, and stirring at a low speed of 500r/min for 1 h;
s6, carrying out suction filtration on the substance obtained in the step S5, washing with ethanol, and carrying out vacuum drying at 50 ℃ for 10-12h to obtain microcapsule powder.
Further, the preparation method of the beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil clathrate compound comprises the following steps:
s1, weighing 5g of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin, adding the beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin into 100mL of ethanol water solution, wherein the volume ratio of ethanol to water is 1:8, and homogenizing at a high speed of 10000r/min for 5 min;
s2, slowly dropping the lavender and chamomile essential oil compound into the beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin emulsion, wherein the core-wall ratio is 3: 10, stirring at the heat preservation of 900r/min, wherein the inclusion temperature is 40 ℃, and the inclusion time is 2 hours;
s3, after the inclusion is finished, the mixture is placed in a refrigerator to be cooled for 6-8h, is filtered, is washed by ethanol, and is dried in vacuum for 10-12h at the temperature of 50 ℃ to obtain the beta-cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound.
Further, a preparation method of the polyurethane sponge comprises the following steps:
s1, when isocyanate and polyether polyol are polymerized, adding chitosan microcapsules, beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds into polyether polyol, MDI (diphenylmethane diisocyanate) diisocyanate or TDI (toluene diisocynate), a chain extender, a high-efficiency foam stabilizer, a high-efficiency composite catalyst, an external foaming agent and water to prepare raw materials for polymerization and foaming;
Foaming is open continuous low-pressure foam, raw materials are sprayed to a foaming system conveying device through a foaming nozzle, foaming and conveying are carried out while limiting the conveying device, the width of polyurethane sponge is controlled, the thickness of the polyurethane sponge is controlled by the flow and the conveying speed of the raw materials, the output quantity of a mixing head is adjusted to meet the requirement of the width and the thickness of the foam, and the top height and the radian of the foam are controlled by adjusting the conveying speed and the position of a falling plate to obtain a required foam flow pattern;
and S2, after the foaming of the large-size polyurethane sponge is finished, carrying out special-shaped cutting by adopting a subsequent cutting technology.
Further, in the step S1, the flow rate of the raw material sprayed by the foaming nozzle is controlled to be 80-400kg/min, the conveying speed is controlled to be 2-6m/min, and the foaming time is 2-5 min.
The invention has the advantages that:
1. the preparation method comprises the steps of taking plant-derived lavender and chamomile extracts with sleep-aiding effect as aromatic core materials, taking natural antibacterial chitosan and starch decomposition products with cavity nests and deodorization functions as wall materials, preparing microcapsules with slow-release sleep-aiding fragrance, adding the prepared microcapsules and beta-CD cyclodextrin inclusion compounds into a polymerization monomer of polyurethane sponge, and enabling active groups to participate in polymerization reaction of polyurethane to prepare the durable sleep-aiding aromatic polyurethane sponge with the slow-release lavender and chamomile, so that the problems that the current consumers are troublesome and waste time due to essential oil incense or massage before sleeping are solved;
2. Because the lavender and chamomile extracts have the sleep-aiding effect, the chitosan microcapsules and the lavender and chamomile extracts coated by beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin in the polyurethane sponge are slowly released due to the friction of a human body in the sleep process, so that the long-acting sleep-aiding effect is achieved;
3. the specific cavity structures of the beta-CD cyclodextrin and the hydroxypropyl beta-CD cyclodextrin are provided with a plurality of hydroxyl groups on the outer surfaces, and can participate in the polymerization reaction of polyurethane sponge, so that the beta-CD cyclodextrin or the hydroxypropyl beta-CD cyclodextrin which is included with lavender and chamomile extracts is anchored in the polyurethane sponge; in addition, if part of the lavender and the chamomile released from the chitosan microcapsule in the polymerization process are included by the beta-CD cyclodextrin anchored on the sponge again, the effect of slowly releasing the lavender and the chamomile is achieved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
A preparation method of polyurethane sponge with fragrance-releasing and sleep-aiding functions comprises the following specific preparation steps:
s1, preparing the chitosan microcapsule, wherein the preparation method comprises the following steps:
s1.1, weighing chitosan with the molecular weight of 3 ten thousand and the mass of 1g, dissolving the chitosan in a 1% acetic acid solution, and preparing a 1% chitosan acetic acid solution;
s1.2, measuring 0.5g of emulsifier, wherein the amount of the emulsifier is 0.25g of span 80 and 0.25g of Tween 80, adding 50mL of distilled water, carrying out high-speed emulsification, slowly adding a compound of lavender and chamomile extracts, and mixing the materials according to a ratio of capsule core to wall material of 1: 1, adding 1g of compound essential oil, and emulsifying at a high speed of 10000r/min for 15 min;
s1.3, adding the essential oil emulsion into the chitosan acetic acid solution obtained in the step S1.1 under the condition of mechanical stirring, wherein the stirring temperature is 50 ℃, the stirring speed is 1000r/min, and the stirring time is 30 min;
s1.4, adding 40ml of 2% sodium sulfate in the step S1.3, and flocculating for 20min at the rotating speed of 500 r/min;
s1.5, rapidly cooling the solution obtained in the step S1.4 through an ice-water bath, adjusting the pH to 9 through 10% sodium hydroxide, adding 0.1mL of 25% glutaraldehyde serving as a curing agent, and stirring at a low speed of 500r/min for 1 h;
s1.6, carrying out suction filtration on the substance obtained in the step S1.5, washing with ethanol, and carrying out vacuum drying at 50 ℃ for 10-12h to obtain microcapsule powder.
S2, preparing beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds, wherein the preparation method comprises the following steps:
s2.1, weighing 5g of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin, adding the beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin into 100mL of ethanol water solution, wherein the volume ratio of ethanol to water is 1:8, and homogenizing at a high speed of 10000r/min for 5 min;
s2.2, slowly dropping the lavender and chamomile essential oil compound into the beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin emulsion, wherein the core-wall ratio is 3: 10, stirring at the temperature of 900r/min, wherein the inclusion temperature is 40 ℃, and the inclusion time is 2 h;
s2.3, after the inclusion is finished, placing the mixture in a refrigerator to be cooled for 6-8h, carrying out suction filtration, washing the mixture with ethanol, and carrying out vacuum drying at 50 ℃ for 10-12h to obtain the beta-cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound.
S3, the polyurethane sponge comprises the following components: polyether polyol, MDI (diphenylmethane diisocyanate) or TDI (toluene diisocynate), a chain extender, a high-efficiency foam stabilizer, a high-efficiency composite catalyst, an external foaming agent, water, a beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender prepared in the step S2 and a chamomile essential oil clathrate compound prepared in the step S1 and chitosan microcapsules prepared in the step S1 are prepared into raw materials for polymerization and foaming, the chain extender is a polyol or diamine low-molecular compound, the high-efficiency foam stabilizer is an organosilicon foam stabilizer or a polysiloxane-polyoxyalkylene mosaic copolymer, the high-efficiency composite catalyst is a tin catalyst and an amine catalyst, all physical foaming agents for polyurethane foaming can be used as the external foaming agent, and all polyether for polyurethane foaming can be used as polyether polyol.
Foaming is open continuous low-pressure foam, raw materials are sprayed to a foaming system conveying device through a foaming nozzle, foaming and conveying are carried out while limiting the conveying device, the width of polyurethane sponge is controlled, the thickness of the polyurethane sponge is controlled by the flow rate and the conveying speed of the raw materials, the output quantity of a mixing head is adjusted to meet the requirement of the width and the thickness of the foam, the required foam flow pattern is obtained by adjusting the conveying speed and the position of a falling plate and controlling the top height and the radian of the foam, the flow rate of the raw materials sprayed by the foaming nozzle is controlled to be 80-400kg/min, the conveying speed is controlled to be 2-6m/min, and the foaming time is 2-5 min;
and S4, after the foaming of the large-size polyurethane sponge is finished, carrying out special-shaped cutting by adopting a subsequent cutting technology.
Example 1
The common cotton is prepared by polymerizing the isocyanate and the polyether polyol by the method and comprises the following components in parts by weight: 70 parts of polyether with the molecular weight of 3000 and the hydroxyl value of 56, 30 parts of polyether with the molecular weight of 3000 and the hydroxyl value of 28, 46 parts of TDI, 1.1 parts of organic silicon foam stabilizer, 0.18 part of tin composite catalyst, 0.24 part of amine composite catalyst, 3.3 parts of dichloromethane external foaming agent, 3.35 parts of water, 0.2 part of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin inclusion compound of lavender and chamomile essential oil, 0.2 part of chitosan microcapsule, wherein the capsule core of the chitosan microcapsule is a compound of extracts of lavender and chamomile, and the compound ratio of the extracts of lavender and chamomile is 1: 1.
Example 2
The slow rebound foam prepared by polymerizing the isocyanate and the polyether polyol by the method comprises the following components in parts by weight: 37 parts of polyether with the molecular weight of 3000 and the hydroxyl value of 56, 10 parts of polyether with the molecular weight of 3000 and the hydroxyl value of 28, 50 parts of polyether with the molecular weight of 700 and the hydroxyl value of 240, 3 parts of polyether with the molecular weight of 5000 and the hydroxyl value of 37, TDI 36 parts, 1.2 parts of organosilicon foam stabilizer, 0.7 part of tin composite catalyst, 0.3 part of amine composite catalyst, 2 parts of water, 0.2 part of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin inclusion compound of lavender and chamomile essential oil, 0.2 part of chitosan microcapsule, a capsule core of the chitosan microcapsule is a composite of extracts of lavender and chamomile, and the composite ratio of the extracts of lavender and chamomile is 1: 1.
example 3
The isocyanate and polyether polyol are polymerized to prepare the air-sensitive cotton by the method, and the air-sensitive cotton comprises the following components in parts by weight: 13 parts of polyether with the molecular weight of 3000 and the hydroxyl value of 28, 7 parts of polyether with the molecular weight of 700 and the hydroxyl value of 240, 80 parts of polyether with the molecular weight of 5000 and the hydroxyl value of 37, 59.4 parts of MDI, 0.23 part of chain extender, 3.1 parts of organosilicon foam stabilizer, 0.33 part of amine catalyst, 5 parts of dichloromethane external foaming agent, 3.33 parts of water, 0.5 part of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin inclusion compound of lavender and chamomile essential oil, 0.5 part of chitosan microcapsule, wherein the capsule core of the chitosan microcapsule is a compound of extracts of lavender and chamomile, and the compound ratio of the extracts of lavender and chamomile is 1: 1.
The performances of the common cotton, the slow rebound cotton and the air feeling cotton with the fragrance releasing and sleep aiding functions, which are prepared by the formula, are tested, and the test results are shown in table 1.
Table 1 Performance test results of plain cotton, slow-rebound cotton and air-sensitive cotton with fragrance-releasing and sleep-aiding functions prepared in examples 1 to 3
The aroma retention is the percentage of the amount of lavender and chamomile extracts in the polyurethane sponge extracted with alcohol after 6 months of use to the amount of lavender and chamomile extracts extracted with alcohol just prepared for the aroma-releasing sponge.
As can be seen from the above table, the prepared common sponge, slow-rebound sponge and qi-sense sponge with the fragrance-releasing and sleep-aiding functions have long-acting sleep-aiding effects.
Another preparation method of the polyurethane sponge with fragrance-releasing and sleep-aiding functions comprises the following specific preparation steps:
s1, polymerizing isocyanate and polyether polyol to form polyurethane sponge, and adding a chain extender, a high-efficiency foam stabilizer, a high-efficiency composite catalyst, an external foaming agent and water into a polymerization system;
s2, performing post-treatment on the polyurethane sponge by using beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender, chamomile essential oil inclusion compound and chitosan microcapsule, wherein the post-treatment mode is ultrasonic impregnation and hot air drying, the impregnation formula comprises 40-100g/L of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound and 30-50g/L of chitosan microcapsule, the ultrasonic impregnation power is 100-150W, the frequency is 40-80 Hz, the temperature is 40-50 ℃, the time is 30mim-60min, the vacuum drying temperature is 40-50 ℃, the pressure is 0.08-0.09MPa, and the time is 10-12 h.
Example 4
The formula of the polyurethane sponge for post-treatment by ultrasonic impregnation is as follows: 40g/L of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound and 30g/L of chitosan microcapsule.
Example 5
The formula of the polyurethane sponge for post-treatment by ultrasonic impregnation is as follows: 60g/L of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound and 50g/L of chitosan microcapsule.
Example 6
The formula of the polyurethane sponge for post-treatment by ultrasonic impregnation is as follows: 50g/L of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound and 40g/L of chitosan microcapsule.
TABLE 2 comparison of the quality of the components of examples 4-6
In order to compare the performances of the polyurethane sponge with the fragrance-releasing and sleep-aiding functions prepared by the formula, the polyurethane sponge is subjected to related performance tests, and the test results are shown in table 3.
TABLE 3 Performance test results of polyurethane sponges with fragrance-releasing and sleep-aiding functions, prepared in examples 4-6
As can be seen from the above table, the prepared polyurethane sponge with fragrance releasing and sleep aiding functions has a long-acting sleep aiding effect; in addition, comparing examples 4 to 6 with each other, it can be seen that each performance of example 5 is superior to that of the other two examples, and thus example 5 is the best example.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A polyurethane sponge with fragrance releasing and sleep aiding functions is prepared by polymerizing isocyanate and polyether polyol, and is characterized in that: adding beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds and chitosan microcapsules in the polymerization process of polyurethane sponge, wherein the capsule core of each chitosan microcapsule is a compound of extracts of lavender and chamomile; the polyurethane sponge comprises the following components in parts by weight: 90-110 parts of polyether polyol, 30-70 parts of MDI (diphenylmethane diisocyanate) or TDI (toluene diisocynate), 0-0.5 part of chain extender, 0.5-5 parts of high-efficiency foam stabilizer, 0.1-1 part of high-efficiency composite catalyst, 0-6 parts of external foaming agent, 1-5 parts of water, 0.2-0.5 part of beta-CD (beta-CD) cyclodextrin lavender and chamomile essential oil inclusion compound and 0.2-0.5 part of chitosan microcapsule;
When the isocyanate and the polyether polyol are polymerized, chitosan microcapsules, beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds are added into the polyether polyol, MDI (diphenylmethane diisocyanate) or TDI (toluene diisocynate), a chain extender, a high-efficiency foam stabilizer, a high-efficiency composite catalyst, an external foaming agent and water to prepare raw materials for polymerization and foaming.
2. The polyurethane sponge with fragrance releasing and sleep aiding functions as claimed in claim 1, wherein: the compound ratio of the extracts of the lavender and the chamomile is 1-3: 1.
3. The polyurethane sponge with fragrance-releasing and sleep-helping functions as claimed in claim 1, wherein: the chain extender is a polyalcohol or diamine low molecular compound, the high-efficiency foam stabilizer is an organic silicon foam stabilizer or a polysiloxane-polyoxyalkylene mosaic copolymer, the high-efficiency composite catalyst is a tin catalyst or an amine catalyst, the external foaming agent is a physical foaming agent used in polyurethane foaming, and the polyether polyol is polyether used in polyurethane foaming.
4. The polyurethane sponge with fragrance-releasing and sleep-helping functions as claimed in claim 1, wherein: the preparation method of the chitosan microcapsule comprises the following steps:
S1, weighing chitosan with the molecular weight of 3-5 ten thousand and the mass of 1g, dissolving the chitosan in 1% acetic acid solution, and preparing 1% chitosan acetic acid solution;
s2, measuring 0.5 g of emulsifier, wherein 0.25 g of span 80 and 0.25 g of Tween 80, adding 50mL of distilled water, emulsifying at high speed, and mixing the materials according to a capsule core-wall material ratio of 1: 1, slowly adding 1g of a compound of lavender and chamomile extracts, and emulsifying at a high speed of 10000r/min for 15 min;
s3, adding the essential oil emulsion into the chitosan acetic acid solution obtained in the step S1 under the condition of mechanical stirring, wherein the stirring temperature is 50 ℃, the stirring speed is 1000r/min, and the stirring time is 30 min;
s4, adding 40ml of 2% sodium sulfate in the step S3, and flocculating for 20min at the rotating speed of 500 r/min;
s5, rapidly cooling the solution obtained in the step S4 through an ice-water bath, adjusting the pH to 9 through 10% sodium hydroxide, adding 0.1 mL of 25% glutaraldehyde serving as a curing agent, and stirring at a low speed of 500r/min for 1 h;
s6, carrying out suction filtration on the substance obtained in the step S5, washing the substance with ethanol, and carrying out vacuum drying at 50 ℃ for 10-12h to obtain microcapsule powder.
5. The polyurethane sponge with fragrance-releasing and sleep-helping functions as claimed in claim 1, wherein: the preparation method of the beta-CD cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound comprises the following steps:
S1, weighing 5g of beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin, adding the beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin into 100mL of ethanol water solution, wherein the volume ratio of ethanol to water is 1:8, and homogenizing at a high speed of 10000r/min for 5 min;
s2, slowly dripping the lavender and chamomile essential oil compound into beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin emulsion, wherein the core-wall ratio is 3: 10, stirring at the temperature of 900r/min, wherein the inclusion temperature is 40 ℃, and the inclusion time is 2 h;
s3, after the inclusion is finished, the mixture is placed in a refrigerator to be cooled for 6-8h, is filtered, is washed by ethanol, and is dried in vacuum for 10-12h at the temperature of 50 ℃ to obtain the beta-cyclodextrin, hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compound.
6. The polyurethane sponge with fragrance-releasing and sleep-helping functions as claimed in claim 1, wherein: the preparation steps of the polyurethane sponge are as follows:
s1, when isocyanate and polyether polyol are polymerized, adding chitosan microcapsules, beta-CD cyclodextrin or hydroxypropyl beta-CD cyclodextrin lavender and chamomile essential oil inclusion compounds into polyether polyol, MDI (diphenylmethane diisocyanate) diisocyanate or TDI (toluene diisocynate), a chain extender, a high-efficiency foam stabilizer, a high-efficiency composite catalyst, an external foaming agent and water to prepare raw materials for polymerization and foaming;
foaming is open continuous low-pressure foam, raw materials are sprayed to a foaming system conveying device through a foaming nozzle, foaming and conveying are carried out while limiting the conveying device, the width of polyurethane sponge is controlled, the thickness of the polyurethane sponge is controlled by the flow and the conveying speed of the raw materials, the output quantity of a mixing head is adjusted to meet the requirement of the width and the thickness of the foam, and the top height and the radian of the foam are controlled by adjusting the conveying speed and the position of a falling plate to obtain a required foam flow pattern;
And S2, after the foaming of the large-size polyurethane sponge is finished, carrying out special-shaped cutting by adopting a subsequent cutting technology.
7. The polyurethane sponge with fragrance-releasing and sleep-helping functions as claimed in claim 6, wherein: in the step S1, the flow rate of the raw material sprayed by the foaming nozzle is controlled to be 80-400kg/min, the conveying speed is controlled to be 2-6m/min, and the foaming time is 2-5 min.
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| CN113861366A (en) * | 2021-10-15 | 2021-12-31 | 烟台德邦科技股份有限公司 | Mildew-resistant waterborne polyurethane resin and preparation method thereof |
| CN114891340B (en) * | 2022-06-07 | 2024-03-08 | 江苏集萃先进高分子材料研究所有限公司 | Shape memory composite foaming material with fragrance and preparation method thereof |
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| CN105131230B (en) * | 2015-09-23 | 2017-08-25 | 福建越特新材料科技有限公司 | A kind of preparation method of deoderizing long-acting slow-release plants essential oil polyurethane flexible foam |
| CN107496938A (en) * | 2017-09-27 | 2017-12-22 | 西安医学院 | A kind of preparation method of lavender oil hydroxypropyl beta cyclodextrin clathrate |
| CN107550980A (en) * | 2017-09-27 | 2018-01-09 | 西安医学院 | A kind of preparation method of lavender oil beta cyclodextrin clathrate |
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