阅读说明：本技术 一种反相乳化法制备生物质基材料抗热水乳液的方法 (Method for preparing heat-resistant aqueous emulsion of biomass-based material by using reverse phase emulsification method ) 是由 宋晓明 高珊珊 陈夫山 李�浩 王德玄 王燕 张祥斌 汤国锋 于 2020-07-31 设计创作，主要内容包括：本公开提供了一种反相乳化法制备生物质基材料抗热水乳液的方法,包括以下步骤：1)将一定量的丁腈乳液与巴西棕榈蜡、聚乙烯蜡、烷基烯酮二聚体、聚丙烯弹性体、聚丙烯乳液按照一定的比例在高温下熔融,备用；2)将一定量的亚甲基双萘磺酸钠溶于200g水中,升温至80-85℃,备用；3)将熔融的上述1)中的混合液搅拌,缓慢加入20g亚甲基双萘磺酸钠水溶液,剪切5分钟生成W/O乳液；提高搅拌速度,缓慢将剩余的亚甲基双萘磺酸钠水溶液加入,使W/O乳液转相成O/W乳液,剪切10分钟,快速将制备的乳液冷却、出料。本公开得到的施胶乳液用于生物质基材料的浆内施胶,能够很好起到耐热性,提高施胶效果,且产品对环境无危害。(The invention provides a method for preparing a biomass-based material hot water emulsion by an inverse emulsification method, which comprises the following steps: 1) melting a certain amount of butyronitrile emulsion, carnauba wax, polyethylene wax, alkyl ketene dimer, polypropylene elastomer and polypropylene emulsion at a high temperature according to a certain proportion for later use; 2) dissolving a certain amount of methylene dinaphthalene sodium sulfonate in 200g of water, and heating to 80-85 ℃ for later use; 3) stirring the molten mixed solution in the step 1), slowly adding 20g of methylene dinaphthalene sodium sulfonate aqueous solution, and shearing for 5 minutes to generate W/O emulsion; and (3) increasing the stirring speed, slowly adding the residual methylene dinaphthalene sodium sulfonate aqueous solution to convert the W/O emulsion into O/W emulsion, shearing for 10 minutes, and quickly cooling and discharging the prepared emulsion. The sizing emulsion obtained by the method is used for internal sizing of biomass-based materials, can well play a role in heat resistance and improve sizing effect, and is harmless to the environment.)

1. A method for preparing a biomass-based material hot water emulsion by an inverse emulsification method is characterized by comprising the following steps:

firstly, melting a certain amount of butyronitrile emulsion, carnauba wax, polyethylene wax, alkyl ketene dimer, polypropylene elastomer and polypropylene emulsion at a high temperature according to a certain proportion for later use to prepare a mixture, wherein the mass of the mixture is 40-70 g;

dissolving a certain amount of sodium methylene dinaphthalenesulfonate in 200g of water, heating to 80-85 ℃ to prepare an aqueous solution of sodium methylene dinaphthalenesulfonate for later use;

step three, stirring the melted mixture in the step one at the speed of 700-; and then increasing the shearing speed to 10000-11000r/min, slowly adding the rest of the methylene dinaphthyl sodium sulfonate aqueous solution to convert the W/O emulsion into O/W emulsion, and after shearing for 10 minutes, rapidly cooling and discharging the prepared emulsion to prepare the heat-resistant aqueous emulsion.

2. The method for preparing a hot water emulsion of biomass-based material according to claim 1, wherein in the first step, the solid content of the butyronitrile emulsion is 40-50%.

3. The method for preparing a hot aqueous emulsion of biomass-based material according to claim 1, wherein in the first step, the polypropylene emulsion has a solid content of 30 to 50%.

4. The method for preparing a hot water emulsion of biomass-based material according to claim 1, wherein in step one, the butyronitrile emulsion: the carnauba wax: the polyethylene wax: the alkyl ketene dimer: the polypropylene elastomer is: the mass ratio of the polypropylene emulsion is 20 (5-15): (5-10): 5-15): 3-5): 2-5.

5. The method for preparing a hot aqueous emulsion of a biomass-based material according to claim 1, wherein in the first step, the melting temperature is 120 ℃ to 150 ℃.

6. The method for preparing a hot aqueous emulsion of biomass-based material according to claim 1, wherein in the second step, the mass of the sodium methylenedinaphthalene sulfonate is 0.2 to 1 g.

7. The method for preparing a biomass-based material hot water resistant emulsion according to claim 1, wherein in the first step, the solid content of the butyronitrile emulsion is 50%, the solid content of the polypropylene emulsion is 40%, and the content of the butyronitrile emulsion: the carnauba wax: the polyethylene wax: the alkyl ketene dimer: the polypropylene elastomer is: the mass ratio of the polypropylene emulsion is 20: 15: 10: 15: 5: 5, the melting temperature is 150 ℃; in the second step, the mass of the sodium methylene dinaphthalene sulfonate is 1 g.

Technical Field

The disclosure relates to the field of fine chemicals, in particular to a method for preparing a biomass-based material hot water emulsion by an inverse emulsification method.

Background

In recent years, plastic-limiting regulations are raised worldwide, so that the application of polymer-based materials is limited, fiber-based materials are gradually attracting attention due to the properties of degradability, reproducibility, environmental friendliness, easy recovery and the like, and products such as disposable lunch boxes, disposable paper cups, degradable packaging bags and the like prepared by taking fibers as base materials are favored by consumers. However, the fiber-based material has a certain disadvantage that the liquid permeation resistance and strength of the material are inferior to those of the polymer material, especially the fiber-based material has a large defect in the aspect of resisting the permeation of the superheated liquid. The main approach to this problem is currently to laminate, which is not conducive to the recovery of fiber-based materials.

Disclosure of Invention

The invention provides a method for preparing a biomass-based material hot water emulsion by an inverse emulsification method, which is applied to a fiber-based molding material to solve the problem of poor liquid permeation resistance of the fiber-based material.

According to one aspect of the disclosure, a method for preparing a hot water emulsion of a biomass-based material by an inverse emulsification method comprises the following steps:

firstly, melting a certain amount (high nitrile 45%) of butyronitrile emulsion with carnauba wax, polyethylene wax, Alkyl Ketene Dimer (AKD), polypropylene elastomer (POE) and polypropylene emulsion according to a certain proportion at high temperature for later use to prepare a mixture, wherein the mass of the mixture is 40-70 g;

dissolving a certain amount of sodium methylene dinaphthalenesulfonate in 200g of water, heating to 80-85 ℃ to prepare an aqueous solution of sodium methylene dinaphthalenesulfonate for later use;

step three, stirring the melted mixture in the step one at the speed of 700-; and then increasing the shearing speed to 10000-11000r/min, slowly adding the rest of the methylene dinaphthyl sodium sulfonate aqueous solution to convert the W/O emulsion into O/W emulsion, and after shearing for 10 minutes, rapidly cooling and discharging the prepared emulsion to prepare the heat-resistant aqueous emulsion.

According to at least one embodiment of the present disclosure, in the first step, the solid content of the butyronitrile emulsion is 40-50%.

According to at least one embodiment of the present disclosure, in the first step, the solid content of the polypropylene emulsion is 30-50%.

According to at least one embodiment of the present disclosure, in the step one, the butyronitrile emulsion: the carnauba wax: the polyethylene wax: the alkyl ketene dimer: the polypropylene elastomer is: the mass ratio of the polypropylene emulsion is 20 (5-15): (5-10): 5-15): 3-5): 2-5.

According to at least one embodiment of the present disclosure, in the first step, the melting temperature is 120 ℃ to 150 ℃.

According to at least one embodiment of the present disclosure, in the second step, the mass of the sodium methylenedinaphthalene sulfonate is 0.2 to 1 g.

According to at least one embodiment of the present disclosure, in the step one, the solid content of the butyronitrile emulsion is 50%, the solid content of the polypropylene emulsion is 40%, and the content of the butyronitrile emulsion: the carnauba wax: the polyethylene wax: the alkyl ketene dimer: the polypropylene elastomer is: the mass ratio of the polypropylene emulsion is 20: 15: 10: 15: 5: 5, the melting temperature is 150 ℃; in the second step, the mass of the sodium methylene dinaphthalene sulfonate is 1 g.

After adopting above-mentioned technical scheme, this disclosure has following beneficial effect:

1) the water-resistant emulsion obtained by the method is used for internal sizing of fiber-based materials, can well play a role in resisting liquid penetration, particularly the penetration of overheated liquid, and can replace the traditional laminating process.

2) The butyronitrile emulsion used as the emulsifier in the invention has heat resistance, and the heat resistance of the prepared emulsion can be improved compared with the traditional emulsifier, and the emulsion is nontoxic and harmless, and the waste fiber is easy to recover and is harmless to the environment.

Detailed Description

The present disclosure will be described in further detail with reference to the following embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to embodiments.