阅读说明：本技术 一种果胶洗涤剂 (Pectin detergent ) 是由 华霄 刘敬然 谭婧 张梦蕾 杨瑞金 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种果胶洗涤剂,属于洗涤用品领域。本发明通过采用果胶酶对UHMP果胶进行酶解得到改性果胶；所述UHMP果胶的制备方法为：将果胶分散在甲醇中,果胶与甲醇的固液比(g:mL)为1:5～1:200,加入0.05～0.10mol/L浓度的酸,然后在50～65℃下保持搅拌8～24h。采用本发明方法制备的果胶洗涤剂在15℃、25℃和45℃下的去污率均能高达95％以上,清洁效果好。(The invention discloses a pectin detergent, and belongs to the field of washing products. Carrying out enzymolysis on UHMP pectin by adopting pectinase to obtain modified pectin; the preparation method of the UHMP pectin comprises the following steps: dispersing pectin in methanol, wherein the solid-to-liquid ratio (g: mL) of the pectin to the methanol is 1: 5-1: 200, adding acid with the concentration of 0.05-0.10 mol/L, and keeping stirring at 50-65 ℃ for 8-24 h. The pectin detergent prepared by the method has the decontamination rate of over 95 percent at 15 ℃, 25 ℃ and 45 ℃ and has good cleaning effect.)

1. The modified pectin is characterized by being prepared by the following steps: carrying out enzymolysis on UHMP pectin to obtain modified pectin; the preparation method of the UHMP pectin comprises the following steps: dispersing pectin in methanol, wherein the solid-to-liquid ratio (g: mL) of the pectin to the methanol is 1: 5-1: 200, adding acid with the concentration of 0.05-0.10 mol/L, and keeping stirring at 50-65 ℃ for 8-24 h.

2. The modified pectin according to claim 1, wherein the UHMP pectin is enzymatically hydrolyzed using pectinase.

3. The modified pectin according to claim 1, wherein the pectinase is subjected to the enzymatic hydrolysis conditions of: the temperature is 40-60 deg.C, pH is 4-6, and enzymolysis time is 20-60 min.

4. The modified pectin according to claim 1, wherein the amount of pectinase added is 3-15U/g relative to UHMP pectin.

5. A detergent comprising the modified pectin according to any one of claims 1 to 4.

6. The detergent according to claim 5, wherein the concentration of the modified pectin is 0.01-1 g/L.

7. A detergent as claimed in claim 5 or 6, further comprising an antibacterial agent.

8. Use of the modified pectin of any of claims 1 to 4 in the field of laundry products.

9. Use according to claim 8, wherein the modified pectin is diluted prior to use; the concentration of the diluted modified pectin is 0.01-1 g/L.

10. The hand dishwashing detergent is characterized in that the preparation method of the hand dishwashing detergent comprises the following steps: preparing the modified pectin of any one of claims 1-4 into a solution with a concentration of 5-20 g/L, and adding normal pectin and bacteriostatic agent into the solution to make the normal pectin concentration be 0.5-5% and the bacteriostatic agent concentration be 50-100 mg/kg.

Technical Field

The invention relates to a pectin detergent, and belongs to the field of washing products.

Background

The pectin is a natural complex polysaccharide widely existing in cell walls and intercellular layers of plants, and generally has a molecular weight of 200-400 kDa, and a structure including three regions, (1) a homopolygalacturonic acid region (HG region) formed by connecting galacturonic acid through α -1,4 glycosidic bonds, (2) a rhamnogalacturonic acid I region (RG-I region) formed by alternating rhamnosugars and galacturonic acids, and a plurality of to tens of branches polymerized galactose are connected to the rhamnose, or a plurality of to tens of branches polymerized rhamnose are connected to the rhamnogalacturonate II region (RG-II region) formed by connecting various monosaccharides such as galactose, rhamnose, xylose, mannose through different glycosidic bonds.

Pectin is large in molecular weight and therefore low in solubility, generally > 1% (w/v) pectin is not soluble. The pectin has strong hydrophilicity, and can be used as gel in food processing to make jelly; however, pectin has a relatively weak surface activity due to the lack of hydrophobic groups in its structure, and thus is generally not useful as an emulsifier or surfactant. Therefore, pectin is widely used in various food and pharmaceutical fields mainly by virtue of its excellent gelling property, and there is no report on the use of pectin as a detergent.

Disclosure of Invention

Aiming at the problems, the surface activity of the pectin is improved by modifying the pectin, so that the pectin can be used as a novel nonionic natural surface active substance in the industries of food, medicine, daily chemicals and the like, and the inherent application range of the pectin is expanded.

The first purpose of the invention is to provide a modified pectin, which is prepared by the following steps: carrying out enzymolysis on UHMP pectin to obtain modified pectin; the preparation method of the UHMP pectin comprises the following steps: dispersing pectin in methanol, wherein the solid-to-liquid ratio (g: mL) of the pectin to the methanol is 1: 5-1: 200, adding acid with the concentration of 0.05-0.10 mol/L, and keeping stirring at 50-65 ℃ for 8-24 h.

In one embodiment of the invention, UHMP pectin is enzymatically hydrolyzed using pectinase; the pectinase is polygalacturonase.

In one embodiment of the present invention, the enzymolysis conditions of the pectinase are as follows: the temperature is 40-60 deg.C, pH is 4-6, and enzymolysis time is 20-60 min.

In one embodiment of the invention, the addition amount of the pectinase relative to the UHMP pectin is 3-15U/g.

The second object of the present invention is to provide a detergent containing the above modified pectin.

In one embodiment of the invention, the modified pectin has a concentration of 0.01-1 g/L.

In one embodiment of the invention, the detergent further comprises an antibacterial agent.

The third purpose of the invention is to provide a hand-washing tableware detergent, which is prepared by the following steps: preparing the modified pectin into a solution with the concentration of 5-20 g/L, and then adding common pectin and a bacteriostatic agent into the solution, wherein the concentration of the common pectin is 0.5-5%, and the concentration of the bacteriostatic agent is 50-100 mg/kg.

The fourth purpose of the invention is to provide the application of the modified pectin in the field of washing products.

In one embodiment of the invention, the application is in the cleaning of dishware, cooktops, mechanical parts.

In one embodiment of the invention, the modified pectin is diluted prior to application; the concentration of the diluted modified pectin is 0.01-1 g/L.

The invention has the beneficial effects that:

(1) the modified pectin with low molecular weight and high esterification degree is prepared by modifying pectin, and the esterification degree of the pectin is improved to more than 90% from 60-70% of natural pectin, so that the content of hydrophobic methoxyl in the pectin structure is improved, and the content of strongly hydrophilic carboxyl is reduced; on the other hand, the molecular weight of the pectin is reduced to 20-50 kDa, so that the solubility of the pectin is remarkably improved to 10% (w/v), and the pectin solution has no obvious viscosity. After the structure modification, the pectin molecules can overcome the original problems of low solubility and high viscosity, the pectin molecules can spontaneously form micelles in the solution, the pectin is uniformly dissolved in the solution when the concentration of the pectin is controlled to be lower than the critical micelle concentration, at the moment, if oil drops enter a water phase, the pectin molecules can spontaneously gather on the oil drops to form emulsion drops, and the emulsion drops can be used as a surfactant to take away oily molecules, so that the oil stain cleaning effect is achieved.

(2) The pectin detergent prepared by the method has the decontamination rate of over 95 percent at 15 ℃, 25 ℃ and 45 ℃ and has good cleaning effect.

Drawings

FIG. 1 is a scanning electron micrograph of the dispersion of modified pectin in water prepared in example 1 of the present invention, wherein (a) the modified pectin concentration is 2.0g/L, the left side is 50000 times larger, and the right side is 20000 times larger; (b) the concentration of middle modified pectin is 0.4g/L, the amplification is 50000 times on the left, and the amplification is 20000 times on the right.

Detailed Description

In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.

1. The detergency ratio measuring method comprises:

according to the method I of appendix B of national standard GB 9985-2000, namely the oil removal rate method (arbitration method), pectin powder is dissolved in water to prepare a solution with a certain concentration, and then the detergency is directly tested.

2. Polygalacturonase is a commercial enzyme preparation, available from novacin corporation.