CN113754916A - Preparation process of rare earth antibacterial natural latex product - Google Patents
Preparation process of rare earth antibacterial natural latex product Download PDFInfo
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- CN113754916A CN113754916A CN202111213255.2A CN202111213255A CN113754916A CN 113754916 A CN113754916 A CN 113754916A CN 202111213255 A CN202111213255 A CN 202111213255A CN 113754916 A CN113754916 A CN 113754916A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2307/00—Characterised by the use of natural rubber
- C08J2307/02—Latex
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Abstract
A preparation process of rare earth antibacterial natural latex products. Provides a preparation process of a rare earth antibacterial natural latex product which has a long-acting antibacterial effect and is more sanitary and safer. The method comprises the steps of raw material preparation, pre-vulcanization, foaming, vulcanization, washing and drying, wherein the added antibacterial agent is a nano cerium oxide doped modified nano zinc oxide dispersoid, and in order to improve the dispersibility of the antibacterial agent and the compatibility with natural latex, the nano cerium oxide doped modified nano zinc oxide dispersoid is prepared by ultrasonic and ball milling processes. Finally, in the washing procedure of the latex product finished product, a spraying device is additionally arranged, so that the antibacterial effect of the surface of the product is better than that of the inside of the product.
Description
Technical Field
The invention relates to the field of latex sponges, in particular to a preparation process of a rare earth antibacterial natural latex product.
Background
In recent years, the demand of human beings for antibacterial materials is increasing, and antibacterial bedding is the focus of attention. The natural latex sponge product can be added with zinc oxide as an activating agent in the production process, and the zinc oxide interacts with sulfur and an accelerating agent, so that the solubility of the zinc oxide in rubber materials is increased, and the crosslinking density of vulcanized latex is improved. The zinc oxide has photocatalytic activity and can play an antibacterial role, however, the light wave band required by the nano oxide photocatalytic antibacterial is in an ultraviolet light area, the range is small, and the defects of low light utilization rate and the like exist. So that the zinc oxide can not achieve the ideal antibacterial effect in the natural latex sponge product.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation process of a rare earth antibacterial natural latex product which has a long-acting antibacterial effect and is more sanitary and safer.
The technical scheme of the invention is that the method comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the raw materials are prepared according to the formula and stirred evenly, and then stirred in water bath for 5-10h at the temperature of 25-28 ℃, and then pre-vulcanized;
the raw materials comprise the following components in parts by weight: natural latex: 90-100 parts; vulcanizing agent: 6-10 parts; potassium oleate: 1-8 parts; castor oil: 1-5 parts; potassium pyrophosphate: 0.1-3 parts;
(2) adding the prepared pre-vulcanized latex, the nano cerium oxide doped modified nano zinc oxide dispersoid and a hardener into foaming equipment together for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 5-15 parts, and the hardener accounts for 3-8 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 20-60 min;
(4) and washing, dehydrating and drying the finished product to finish the process.
In the step (2), the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows:
firstly, mixing 100 parts of nano zinc oxide, 1-10 parts of silane coupling agent and 80-150 parts of water, and carrying out ultrasonic treatment for 10-30min at the ultrasonic frequency of 20-80kHz to obtain modified nano zinc oxide;
secondly, adding 5-30 parts of nano cerium oxide and 1-5 parts of dispersing agent, and carrying out ultrasonic treatment for 5-20min at an ultrasonic frequency of 20-80 kHz;
and then the mixture is put into a ball mill for grinding for 3-8h at the rotating speed of 200-300r/min to obtain the uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid.
In the step (2), the nano cerium oxide doped modified nano zinc oxide dispersoid is added into the pre-vulcanized latex at a constant speed before foaming, and is uniformly mixed by a foaming disc.
In the step (4), the step (c),
the spraying antibacterial agent is arranged between the dehydration and the drying;
the process of spraying the antibacterial agent comprises the following steps:
by adding a spraying pipeline, the sprayed solution is a nano cerium oxide doped modified nano zinc oxide aqueous solution, and the concentration of the nano cerium oxide doped modified nano zinc oxide aqueous solution is 50-80% of that of the nano cerium oxide doped modified nano zinc oxide dispersoid.
In the working process, the rare earth antibacterial natural latex product is prepared by adding the nano cerium oxide doped modified nano zinc oxide dispersoid.
Zinc oxide is added as an activating agent in the production process of the natural latex sponge product, so that the crosslinking density of vulcanized latex is improved. Meanwhile, the zinc oxide has photocatalytic activity and can play a role in antibiosis, and the rare earth cerium oxide is doped to expand the light absorption range, so that the photocatalytic antibacterial activity of the zinc oxide can be effectively improved.
Meanwhile, the nano cerium oxide doped modified nano zinc oxide dispersoid is prepared by ultrasonic and ball milling processes, so that the dispersibility of the antibacterial agent is effectively improved, and the compatibility with natural latex is improved.
The invention not only ensures that the prepared latex product has high-efficiency and durable antibacterial performance, but also can save cost and is healthier, safer and more sanitary.
Detailed Description
The invention comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the raw materials are prepared according to the formula and stirred evenly, and then stirred in water bath for 5-10h at the temperature of 25-28 ℃, and then pre-vulcanized;
the raw materials comprise the following components in parts by weight: natural latex: 90-100 parts; vulcanizing agent: 6-10 parts; potassium oleate: 1-8 parts; castor oil: 1-5 parts; potassium pyrophosphate: 0.1-3 parts;
(2) adding the prepared pre-vulcanized latex, the nano cerium oxide doped modified nano zinc oxide dispersoid and a hardener into foaming equipment together for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 5-15 parts, and the hardener accounts for 3-8 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 20-60 min;
(4) and washing, dehydrating and drying the finished product to finish the process.
The added antibacterial agent is nano cerium oxide doped modified nano zinc oxide dispersoid, wherein zinc oxide is used as an activating agent, and the crosslinking density of vulcanized latex is improved. Meanwhile, the zinc oxide has photocatalytic activity and can play a role in antibiosis, and the rare earth cerium oxide is doped to expand the light absorption range, so that the photocatalytic antibacterial activity of the zinc oxide can be effectively improved.
In the step (2), the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows:
firstly, mixing 100 parts of nano zinc oxide, 1-10 parts of silane coupling agent and 80-150 parts of water, and carrying out ultrasonic treatment for 10-30min at the ultrasonic frequency of 20-80kHz to obtain modified nano zinc oxide;
secondly, adding 5-30 parts of nano cerium oxide and 1-5 parts of dispersing agent, and carrying out ultrasonic treatment for 5-20min at an ultrasonic frequency of 20-80 kHz;
and then the mixture is put into a ball mill for grinding for 3-8h at the rotating speed of 200-300r/min to obtain the uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid.
The nanometer cerium oxide doped modified nanometer zinc oxide dispersoid is prepared by ultrasonic and ball milling processes, so that the dispersibility of the antibacterial agent is effectively improved, and the compatibility with natural latex is improved.
In the step (2), the nano cerium oxide doped modified nano zinc oxide dispersoid is added into the pre-vulcanized latex at a constant speed before foaming, and is uniformly mixed by a foaming disc.
Because the zinc oxide can reduce the stability of the vulcanized latex, the viscosity of the vulcanized latex is increased along with the increase of time, and the preparation process of the latex is influenced, the nano cerium oxide doped modified nano zinc oxide dispersoid is added into the pre-vulcanized latex at a constant speed before foaming, and the pre-vulcanized latex is uniformly mixed through a foaming disc, so that the stability is improved.
In the step (4), the step (c),
the spraying antibacterial agent is arranged between the dehydration and the drying;
the process of spraying the antibacterial agent comprises the following steps:
by adding a spraying pipeline, the sprayed solution is a nano cerium oxide doped modified nano zinc oxide aqueous solution, and the concentration of the nano cerium oxide doped modified nano zinc oxide aqueous solution is 50-80% of that of the nano cerium oxide doped modified nano zinc oxide dispersoid.
A spraying pipeline is added after the washing process of the natural latex sponge finished product, and the solution nano cerium oxide doped modified nano zinc oxide is sprayed on the surface of the finished product, so that the antibacterial effect of the surface of the product is superior to that of the inside of the product.
Specific examples are as follows:
example 1
The preparation process of the rare earth antibacterial natural latex product comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the method comprises the following steps of preparing raw materials according to a formula, uniformly stirring, stirring in a water bath at 25 ℃ for 8 hours, and pre-vulcanizing, wherein the raw materials are prepared from the following components in parts by weight: natural latex: 90 parts of a mixture; vulcanizing agent: 6 parts of (1); potassium oleate: 5 parts of a mixture; castor oil: 2 parts of (1); potassium pyrophosphate: 0.1 part;
(2) adding the prepared nano cerium oxide doped modified nano zinc oxide dispersoid and a hardening agent into pre-vulcanized latex before foaming, and adding the pre-vulcanized latex and the hardening agent into foaming equipment together according to a certain proportion for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 10 parts, and the hardening agent accounts for 4 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 30 min;
(4) washing, dehydrating, spraying an antibacterial agent and drying the finished product, wherein the spraying concentration is 60% of the nano cerium oxide doped modified nano zinc oxide dispersoid;
the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows: 100 parts of nano zinc oxide, 2 parts of silane coupling agent and 100 parts of water, and performing ultrasonic treatment for 10min to obtain modified nano zinc oxide, adding 12 parts of nano cerium oxide, 2 parts of dispersing agent and 10min of ultrasonic treatment, and then placing the mixture in a ball mill for grinding for 5h at the rotating speed of 280r/min to obtain uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid, wherein the ultrasonic frequency is 40 kHz.
Example 2
The preparation process of the rare earth antibacterial natural latex product comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the method comprises the following steps of preparing raw materials according to a formula, uniformly stirring, stirring in a water bath at 28 ℃ for 10 hours, and pre-vulcanizing, wherein the raw materials are prepared from the following components in parts by weight: natural latex: 95 parts of (C); vulcanizing agent: 8 parts of a mixture; potassium oleate: 4 parts of a mixture; castor oil: 2 parts of (1); potassium pyrophosphate: 0.1 part;
(2) adding the prepared nano cerium oxide doped modified nano zinc oxide dispersoid and a hardening agent into pre-vulcanized latex before foaming, and adding the pre-vulcanized latex and the hardening agent into foaming equipment together according to a certain proportion for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 15 parts, and the hardening agent accounts for 4.5 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 30 min;
(4) washing, dehydrating, spraying an antibacterial agent and drying the finished product, wherein the spraying concentration is 60% of the nano cerium oxide doped modified nano zinc oxide dispersoid;
the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows: 100 parts of nano zinc oxide, 3 parts of silane coupling agent and 100 parts of water, and carrying out ultrasonic treatment for 15min to obtain modified nano zinc oxide, adding 20 parts of nano cerium oxide, 3 parts of dispersing agent and carrying out ultrasonic treatment for 10min, and then placing the mixture in a ball mill for grinding for 6h at the rotating speed of 280r/min to obtain uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid, wherein the ultrasonic frequency is 40 kHz.
Example 3
The preparation process of the rare earth antibacterial natural latex product comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the method comprises the following steps of preparing raw materials according to a formula, uniformly stirring, stirring in a water bath at 26 ℃ for 6 hours, and pre-vulcanizing, wherein the raw materials are prepared from the following components in parts by weight: natural latex: 100 parts of (A); vulcanizing agent: 8 parts of a mixture; potassium oleate: 4 parts of a mixture; castor oil: 2 parts of (1); potassium pyrophosphate: 0.3 part;
(2) adding the prepared nano cerium oxide doped modified nano zinc oxide dispersoid and a hardening agent into pre-vulcanized latex before foaming, and adding the pre-vulcanized latex and the hardening agent into foaming equipment together according to a certain proportion for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 10 parts, and the hardening agent accounts for 5 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 40 min;
(4) washing, dehydrating, spraying an antibacterial agent and drying the finished product, wherein the spraying concentration is 50% of the nano cerium oxide doped modified nano zinc oxide dispersoid;
the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows: 100 parts of nano zinc oxide, 2.5 parts of silane coupling agent and 100 parts of water, carrying out ultrasonic treatment for 12min to obtain modified nano zinc oxide, adding 15 parts of nano cerium oxide, 2 parts of dispersing agent and 15min of ultrasonic treatment, and then placing the mixture in a ball mill for grinding for 8h at the rotating speed of 280r/min to obtain uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid, wherein the ultrasonic frequency is 40 kHz.
Example 4
The preparation process of the rare earth antibacterial natural latex product comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the method comprises the following steps of preparing raw materials according to a formula, uniformly stirring, stirring in a water bath at 27 ℃ for 8 hours, and pre-vulcanizing, wherein the raw materials are prepared from the following components in parts by weight: natural latex: 96 parts of (1); vulcanizing agent: 9 parts of (1); potassium oleate: 4 parts of a mixture; castor oil: 3 parts of a mixture; potassium pyrophosphate: 0.2 part;
(2) adding the prepared nano cerium oxide doped modified nano zinc oxide dispersoid and a hardening agent into pre-vulcanized latex before foaming, and adding the pre-vulcanized latex and the hardening agent into foaming equipment together according to a certain proportion for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 9 parts, and the hardening agent accounts for 4 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 30 min;
(4) washing, dehydrating, spraying an antibacterial agent and drying the finished product, wherein the spraying concentration is 60% of the nano cerium oxide doped modified nano zinc oxide dispersoid;
the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows: 100 parts of nano zinc oxide, 3.5 parts of silane coupling agent and 100 parts of water, and carrying out ultrasonic treatment for 10min to obtain modified nano zinc oxide, adding 12 parts of nano cerium oxide, 3 parts of dispersing agent and 15min of ultrasonic treatment, and then placing the mixture in a ball mill for grinding for 8h at the rotating speed of 280r/min to obtain uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersion, wherein the ultrasonic frequency is 40 kHz.
Example 5
The preparation process of the rare earth antibacterial natural latex product comprises the following steps:
(1) preparing raw materials and pre-vulcanizing; the method comprises the following steps of preparing raw materials according to a formula, uniformly stirring, stirring in a water bath at 28 ℃ for 8 hours, and pre-vulcanizing, wherein the raw materials are prepared from the following components in parts by weight: natural latex: 98 parts of a mixture; vulcanizing agent: 7 parts; potassium oleate: 3 parts of a mixture; castor oil: 1 part; potassium pyrophosphate: 0.3 part;
(2) adding the prepared nano cerium oxide doped modified nano zinc oxide dispersoid and a hardening agent into pre-vulcanized latex before foaming, and adding the pre-vulcanized latex and the hardening agent into foaming equipment together according to a certain proportion for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 8 parts, and the hardening agent accounts for 4.5 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 30 min;
(4) washing, dehydrating, spraying an antibacterial agent and drying the finished product, wherein the spraying concentration is 50% of the nano cerium oxide doped modified nano zinc oxide dispersoid;
the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersoid are as follows: 100 parts of nano zinc oxide, 1.5 parts of silane coupling agent and 100 parts of water, and carrying out ultrasonic treatment for 10min to obtain modified nano zinc oxide, adding 10 parts of nano cerium oxide, 2 parts of dispersing agent and carrying out ultrasonic treatment for 15min, and then placing the mixture in a ball mill for grinding for 5h at the rotating speed of 280r/min to obtain uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersion, wherein the ultrasonic frequency is 40 kHz.
The experimental species tested for the preparations of examples 1-5 are as follows:
| experimental strains | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Escherichia coli | 98.26 | >99 | 98.75 | 97.84 | 96.57 |
| Staphylococcus aureus | 98.17 | >99 | 98.42 | 97.62 | 95.65 |
The latex product prepared by the invention has high-efficiency and durable antibacterial performance and is sanitary and reliable.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (4)
1. A preparation process of a rare earth antibacterial natural latex product is characterized by comprising the following steps:
(1) preparing raw materials and pre-vulcanizing; the raw materials are prepared according to the formula and stirred evenly, and then stirred in water bath for 5-10h at the temperature of 25-28 ℃, and then pre-vulcanized;
the raw materials comprise the following components in parts by weight: natural latex: 90-100 parts; vulcanizing agent: 6-10 parts; potassium oleate: 1-8 parts; castor oil: 1-5 parts; potassium pyrophosphate: 0.1-3 parts;
(2) adding the prepared pre-vulcanized latex, the nano cerium oxide doped modified nano zinc oxide dispersoid and a hardener into foaming equipment together for foaming, wherein the nano cerium oxide doped modified nano zinc oxide dispersoid accounts for 5-15 parts, and the hardener accounts for 3-8 parts;
(3) a vulcanization step; performing radio frequency vulcanization and shaping, and performing steam vulcanization at 100 ℃ for 20-60 min;
(4) and washing, dehydrating and drying the finished product to finish the process.
2. The preparation process of the rare earth antibacterial natural latex product according to claim 1, wherein in the step (2), the specific preparation steps of the nano cerium oxide doped modified nano zinc oxide dispersion are as follows:
firstly, mixing 100 parts of nano zinc oxide, 1-10 parts of silane coupling agent and 80-150 parts of water, and carrying out ultrasonic treatment for 10-30min at the ultrasonic frequency of 20-80kHz to obtain modified nano zinc oxide;
secondly, adding 5-30 parts of nano cerium oxide and 1-5 parts of dispersing agent, and carrying out ultrasonic treatment for 5-20min at an ultrasonic frequency of 20-80 kHz;
and then the mixture is put into a ball mill for grinding for 3-8h at the rotating speed of 200-300r/min to obtain the uniformly dispersed nano cerium oxide doped modified nano zinc oxide dispersoid.
3. The process for preparing a rare earth antibacterial natural latex product according to claim 1, wherein in the step (2), the nano cerium oxide doped modified nano zinc oxide dispersion is added into the pre-vulcanized latex at a constant speed before foaming, and is uniformly mixed by a foaming disc.
4. The process for preparing rare earth antibacterial natural latex product according to claim 1, wherein in the step (4),
the spraying antibacterial agent is arranged between the dehydration and the drying;
the process of spraying the antibacterial agent comprises the following steps:
by adding a spraying pipeline, the sprayed solution is a nano cerium oxide doped modified nano zinc oxide aqueous solution, and the concentration of the nano cerium oxide doped modified nano zinc oxide aqueous solution is 50-80% of that of the nano cerium oxide doped modified nano zinc oxide dispersoid.
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| CN112940359A (en) * | 2021-03-16 | 2021-06-11 | 宁波恩派新材料科技有限公司 | Preparation method of long-acting sleep-aiding latex pillow |
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2021
- 2021-10-19 CN CN202111213255.2A patent/CN113754916A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917157A (en) * | 2017-03-17 | 2017-07-04 | 宁波三邦超细纤维有限公司 | Degradable antibacterial polylactic acid elastomer and preparation method thereof |
| CN107383466A (en) * | 2017-09-05 | 2017-11-24 | 江苏江盈家居用品有限公司 | The production technology and super thick latex sofa cushion of super thick latex sofa cushion |
| CN111704740A (en) * | 2020-07-17 | 2020-09-25 | 江苏金世缘乳胶制品股份有限公司 | Preparation method of anti-mite natural latex product |
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| CN112094493A (en) * | 2020-08-14 | 2020-12-18 | 沈阳化工大学 | Nano-modified thermoplastic polyurethane elastomer polishing material and preparation method thereof |
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Application publication date: 20211207 |