阅读说明：本技术 一种轻量化保温壶及其制备方法 (Lightweight thermos flask and preparation method thereof ) 是由 傅寿鸿 吴海洋 陈祯力 付培林 于 2020-04-14 设计创作，主要内容包括：本发明涉及保温壶技术领域,尤其涉及一种轻量化保温壶及其制备方法,本发明的一种轻量化保温壶,所述保温壶包括外壳和内胆,所述内胆采用旋薄技术加工成形,且所述内胆的外表面还固定包裹有调温层,所述调温层是以改性碳纤维编织形成网状结构作为载体,再在载体上负载调温微胶囊而成。本发明制备得到的轻量化保温壶,制备得到的保温壶质量更轻,更方便携带、使用,且能够更长时间的保持壶内的水温在适宜人体入口的温度。(The invention relates to the technical field of thermo jug, in particular to a lightweight thermo jug and a preparation method thereof. The light-weight thermos bottle prepared by the invention has lighter weight, is more convenient to carry and use, and can keep the temperature of water in the bottle at a temperature suitable for human body entrance for a longer time.)

1. The light-weight thermos flask is characterized by comprising a shell and an inner container, wherein the inner container is processed and formed by adopting a rotary thinning technology, the outer surface of the inner container is fixedly wrapped with a temperature regulating layer, the temperature regulating layer is formed by weaving modified carbon fibers to form a net structure as a carrier and loading temperature regulating microcapsules on the carrier.

2. The lightweight thermos flask of claim 1, wherein the modified carbon fiber is obtained by pretreating carbon fiber and then modifying the carbon fiber by grafting alkenyl succinic anhydride.

3. The lightweight thermos flask according to claim 2, wherein the temperature-adjusting microcapsule comprises silica as a shell and octadecanol/butyl stearate compound as a core.

4. A lightweight thermo jug according to claim 3, characterised in that the mass ratio of octadecanol to butyl stearate in the octadecanol/butyl stearate complex is 4: 1.

5. The method of any one of claims 1 to 4, wherein the method comprises the steps of:

s1, preparing a shell by a hydraulic expansion technology;

s2, taking a liner raw material pipe, and carrying out pipe flattening treatment by using an instrument vehicle;

s3, putting the product prepared in the step S2 into clear water, cleaning the product, and then putting the product into a water expansion machine, and adjusting the pressure to 12-14MPa to finish water expansion;

s4, necking the upper part of the liner raw material pipe after the water expansion is finished by the air compressor;

s5, performing spinning thinning treatment on the liner raw material pipe subjected to necking treatment by using a spinning thinning machine;

s6, performing corner rolling treatment on the convex corner of the liner raw material pipe subjected to spinning thinning treatment by using a lathe;

s7, cutting off the redundant part at the upper necking part, and rolling threads by using a thread rolling machine to obtain the inner container;

s8, polishing the outer surface of the prepared inner container, then coating a temperature-adjusting layer, performing corona treatment for 10-15min, then coating heat-conducting silica gel with the thickness of 0.1-0.2mm, pressurizing to 0.15MPa at the temperature of 40 ℃, keeping for 30min, pressurizing to 0.2MPa, keeping for 1.5h and curing;

and S7, the inner container and the shell which are prepared in the step S8 are connected together through welding, then the base is welded, and the light-weight heat preservation pot is obtained after vacuumizing.

6. The method for manufacturing a lightweight thermos bottle according to claim 5, wherein the method for manufacturing the temperature-adjusting layer comprises:

preparing a carrier: aggregating the modified carbon fibers into fiber bundles with the diameter of 0.1-0.3mm, and weaving the fiber bundles into a net to obtain a carrier;

loading: according to the proportion, octadecanol and butyl stearate are respectively taken, magnetic stirring is carried out for 1 hour under the condition of a constant-temperature water bath at the temperature of 60 ℃, the capsule core raw material is obtained after cooling to the room temperature, the capsule core raw material and hexadecyl trimethyl ammonium bromide are respectively weighed according to the mass ratio of 4:3 and are placed in a reaction kettle, absolute ethyl alcohol with the mass being fifty times that of the capsule core raw material is added, n-amyl alcohol is added, after stirring and mixing are carried out uniformly, a carrier is added, ultrasonic dispersion is carried out for 1.5 hours under the condition of 60 ℃, tetraethyl orthosilicate is dropwise added at the speed of 1-2d/s, heat preservation is carried out, stirring and reaction is carried out for 1 hour continuously, 25 wt% of ammonia water solution is dropwise added at the speed of 1d/s, stirring and reaction are carried out for 24 hours continuously, after the reaction is finished, filtration is carried out.

7. The method of claim 6, wherein the modified carbon fiber is prepared by: stirring and dispersing the pretreated carbon fiber in 70 wt% ethanol solution, adding 20% sodium hydroxide solution to adjust the pH value to 8.5, adding 3-mercaptopropyltrimethoxysilane, magnetically stirring for 20min, adding alkenyl succinic anhydride, reacting at 80 ℃ for 1h at a constant temperature, cooling to room temperature, filtering, washing and drying to obtain the modified carbon fiber.

8. The method of claim 7, wherein the pre-treatment comprises: soaking carbon fibers in an acetone solution, performing ultrasonic dispersion for 30min, performing reflux reaction at 65 ℃ for 3h, filtering after the reaction is finished, washing with deionized water, drying, placing in a mixed acid solution, performing heat preservation and reflux reaction at 60 ℃ for 6h, filtering after the reaction is finished, washing with deionized water until a washing solution is neutral, drying, and performing plasma treatment.

9. The method for preparing a lightweight thermos according to claim 8, wherein the mixed acid solution is a mixed solution of concentrated nitric acid and concentrated sulfuric acid, and the volume ratio of the concentrated nitric acid to the concentrated sulfuric acid is 3: 1.

10. The method as claimed in claim 9, wherein the plasma treatment is performed with oxygen as a working gas at power of 120-.

Technical Field

The invention relates to the technical field of thermo jug, in particular to a lightweight thermo jug and a preparation method thereof.

Background

Conventional thermo jug adopts the stainless steel to make usually, the surface at the kettle wall is wrapping up the heat preservation, the protective layer is equipped with in the heat preservation outside, can reduce the heat dissipation of kettle wall like this, it reaches energy-conserving heat retaining effect to reduce energy loss, there is vacuum thermo jug, generally contain three layer construction, the inner bag, the vacuum layer, the outer courage, but because the thermo jug is made of metal, the multilayer heat preservation measure of conventional thermo jug can make thermo jug weight heavier, even only the vacuum thermo jug of outer courage and inner bag, because the general thickness of inner bag of current vacuum thermo jug is thick, thereby lead to its weight heavier, and lead to the weight of the thermo jug that finally obtains heavier, the product use of harm user experiences, inconvenient carrying and use, consequently need a lightweight thermo jug at present.

Disclosure of Invention

In view of the above, the present invention provides a lightweight thermos bottle and a manufacturing method thereof, wherein the thermos bottle has a lighter weight, is more convenient to carry and use, and can keep the temperature of water in the thermos bottle at a temperature suitable for human body entrance for a longer time.

The invention solves the technical problems by the following technical means:

the light-weight heat preservation pot comprises a shell and an inner container, wherein the inner container is processed and formed by adopting a rotary thinning technology, a temperature regulation layer is fixedly wrapped on the outer surface of the inner container, the temperature regulation layer is formed by weaving modified carbon fibers to form a net structure as a carrier, and temperature regulation microcapsules are loaded on the carrier.

According to the lightweight thermos bottle, in the preparation process, the inner container is processed and formed by adopting a rotary thinning technology, compared with the conventional thermos bottle, the inner container is thinner, so that the weight is lighter, even if the inner container is coated with the temperature adjusting layer, the temperature adjusting layer takes carbon fibers as a carrier, the carbon fibers have the characteristic of light weight, and the temperature adjusting layer is of a net structure, so that compared with the existing thermos bottle, the lightweight thermos bottle is lighter in weight and more convenient to carry and use.

In addition, the temperature regulating layer arranged on the outer surface of the inner container combines the modified carbon fiber as a carrier and the temperature regulating microcapsule for use, the carbon fiber has good heat conducting property, the carbon fiber is used as the carrier, the timely transmission of heat can be ensured to a certain extent, the heat is stored or released by the temperature regulating microcapsule, the time for reducing hot water in the vacuum cup to the temperature suitable for the human body inlet can be shortened, and the holding time of the temperature can be prolonged, and compared with the existing method for directly filling the phase change material between the inner container and the shell of the temperature keeping kettle, the temperature regulating layer structure is arranged, the structure of the temperature regulating layer is always kept unchanged in the using process, the phenomenon that the phase change material is heated to become liquid and flows, the condition of uneven distribution appears after cooling and solidification can not occur, and the phase change material can not contact with the inner container of the vacuum cup when being liquefied because the phase change material is separated from the inner container of the vacuum, the situation that the phase-change material is immersed into the liner of the vacuum cup or even leaked along with the use can not occur, so that the use is safer and healthier.

Further, the modified carbon fiber is prepared by pretreating carbon fiber and then grafting alkenyl succinic anhydride for modification.

Furthermore, the temperature-regulating microcapsule takes silicon dioxide as a capsule shell and takes an octadecanol/butyl stearate compound as a capsule core.

The silicon dioxide has better heat conductivity, can better play a role in temperature regulation and timely conduct heat, and simultaneously has better heat resistance and aging resistance compared with high polymer materials.

Further, the mass ratio of the octadecanol to the butyl stearate in the octadecanol/butyl stearate compound is 4: 1.

In addition, the invention also discloses a preparation method of the light-weight thermos flask, which comprises the following steps:

s1, preparing a shell by a hydraulic expansion technology;

s2, taking a liner raw material pipe, and carrying out pipe flattening treatment by using an instrument vehicle;

s3, putting the product prepared in the step S2 into clear water, cleaning the product, and then putting the product into a water expansion machine, and adjusting the pressure to 12-14MPa to finish water expansion;

s4, necking the upper part of the liner raw material pipe after the water expansion is finished by the air compressor;

s5, performing spinning thinning treatment on the liner raw material pipe subjected to necking treatment by using a spinning thinning machine;

s6, performing corner rolling treatment on the convex corner of the liner raw material pipe subjected to spinning thinning treatment by using a lathe;

s7, cutting off the redundant part at the upper necking part, and rolling threads by using a thread rolling machine to obtain the inner container;

s8, polishing the outer surface of the prepared inner container, then coating a temperature-adjusting layer, performing corona treatment for 10-15min, then coating heat-conducting silica gel with the thickness of 0.1-0.2mm, pressurizing to 0.15MPa at the temperature of 40 ℃, keeping for 30min, pressurizing to 0.2MPa, keeping for 1.5h and curing;

and S9, the inner container and the shell which are prepared in the step S8 are connected together through welding, then the base is welded, and the light-weight heat preservation pot is obtained after vacuumizing.

Heat conduction silica gel and inner bag have good adhesion properties, consequently utilize heat conduction silica gel to fix the cladding at the surface of inner bag with the layer of adjusting temperature, heat conduction silica gel also has better heat conductivility simultaneously, can improve the heat transfer efficiency on the layer of adjusting temperature to a certain extent, when the water level changes in the thermo jug, also can be better carry out thermal transmission, promote the utilization efficiency of the microcapsule that adjusts temperature.

Further, the preparation method of the temperature adjusting layer comprises the following steps:

preparing a carrier: aggregating the modified carbon fibers into fiber bundles with the diameter of 0.1-0.3mm, and weaving the fiber bundles into a net to obtain a carrier;

loading: according to the proportion, octadecanol and butyl stearate are respectively taken, magnetic stirring is carried out for 1 hour under the condition of a constant-temperature water bath at the temperature of 60 ℃, the capsule core raw material is obtained after cooling to the room temperature, the capsule core raw material and hexadecyl trimethyl ammonium bromide are respectively weighed according to the mass ratio of 4:3 and are placed in a reaction kettle, absolute ethyl alcohol with the mass being fifty times that of the capsule core raw material is added, n-amyl alcohol is added, after stirring and mixing are carried out uniformly, a carrier is added, ultrasonic dispersion is carried out for 1.5 hours under the condition of 60 ℃, tetraethyl orthosilicate is dropwise added at the speed of 1-2d/s, heat preservation is carried out, stirring and reaction is carried out for 1 hour continuously, 25 wt% of ammonia water solution is dropwise added at the speed of 1d/s, stirring and reaction are carried out for 24 hours continuously, after the reaction is finished, filtration is carried out.

Further, the preparation method of the modified carbon fiber comprises the following steps: stirring and dispersing the pretreated carbon fiber in 70 wt% ethanol solution, adding 20% sodium hydroxide solution to adjust the pH value to 8.5, adding 3-mercaptopropyltrimethoxysilane, magnetically stirring for 20min, adding alkenyl succinic anhydride, reacting at 80 ℃ for 1h at a constant temperature, cooling to room temperature, filtering, washing and drying to obtain the modified carbon fiber.

Because the surface of the silicon dioxide contains a plurality of hydroxyl groups, alkenyl succinic anhydride is grafted on the carbon fiber, so that the alkenyl succinic anhydride can react with the hydroxyl groups on the surface of the silicon dioxide in the preparation process of the temperature-regulating layer loading step, the generated temperature-regulating microcapsule is promoted to be directly generated on the surface of the carrier in situ, and the connection is firmer.

Further, the pretreatment comprises the following steps: soaking carbon fibers in an acetone solution, performing ultrasonic dispersion for 30min, performing reflux reaction at 65 ℃ for 3h, filtering after the reaction is finished, washing with deionized water, drying, placing in a mixed acid solution, performing heat preservation and reflux reaction at 60 ℃ for 6h, filtering after the reaction is finished, washing with deionized water until a washing solution is neutral, drying, and performing plasma treatment.

The carbon fiber surface is pre-oxidized and acidified through the mixed acid solution, the carbon fiber is activated to a certain degree, and the plasma treatment is performed, so that the plasma impacts the carbon fiber, the surface of the carbon fiber becomes rougher, the subsequent load is more facilitated, and the further activation can be performed on the carbon fiber through the plasma treatment, and the subsequent grafting reaction is more facilitated.

Further, the mixed acid solution is a mixed solution of concentrated nitric acid and concentrated sulfuric acid, and the volume ratio of the concentrated nitric acid to the concentrated sulfuric acid is 3: 1.

Furthermore, the plasma treatment uses oxygen as the working gas, the power is 120-150W, and the treatment time is 3-5 min.

The invention has the beneficial effects that:

1. according to the lightweight thermos bottle, the inner container is processed and formed by adopting a rotary thinning technology, and compared with the conventional thermos bottle, the inner container is thinner, so that the lightweight thermos bottle is lighter in weight and more convenient to carry and use.

2. According to the lightweight thermos bottle, the temperature adjusting layer is arranged outside the inner container, the modified carbon fiber is used as the carrier and is combined with the temperature adjusting microcapsule for use, the timely transmission of heat can be ensured to a certain extent, the temperature adjusting microcapsule is used for storing or releasing the heat, the time for reducing hot water in the thermos bottle to the temperature suitable for the human body inlet can be shortened, and the temperature keeping time is prolonged.

3. Due to the arrangement of the temperature regulating layer structure, the temperature regulating layer structure is more stable, the phase change material cannot be contacted with the inner container of the vacuum cup during liquefaction, and the situation that the phase change material is immersed into the inner container of the vacuum cup or even leaks when the phase change material is used is avoided, so that the temperature regulating layer structure is safer and healthier to use.

Detailed Description

The present invention will be described in detail with reference to specific examples below:

the invention relates to a lightweight thermos flask, which comprises a shell and an inner container, wherein the inner container is processed and formed by adopting a spinning technology, the outer surface of the inner container is fixedly wrapped with a temperature regulating layer, the temperature regulating layer is formed by weaving modified carbon fibers into a net structure as a carrier and loading temperature regulating microcapsules on the carrier, and the temperature regulating microcapsules take silicon dioxide as a capsule shell and octadecanol/butyl stearate compound as a capsule core. The method comprises the following specific steps: