Bleaching method capable of maintaining mechanical strength of corn bracts

Abstract

The invention belongs to the technical field of bleaching of corn bracts and particularly relates to a bleaching method capable of maintaining the mechanical strength of the corn bracts. The method includes the following contents that pre-treated corn bracts are subjected to soaking treatment in bleaching complex liquid, the temperature is controlled to be 45-55 DEG C in the soaking process, bleaching lasts for 30-40 minutes, treatment is performed with ultrasonic wave of which the power is 80-120 W in the bleaching process, ultrasonic wave treatment is periodic treatment, ultrasonic wave treatment is performed for 20 seconds at intervals of five minutes, and then drying is performed under the condition that the temperature is 60-70 DEG C till the water content is lower than 15%. Comparedwith the prior art, the bleaching method has the following advantages that by reasonably preparing the bleaching complex liquid, the mechanical strength of the corn bracts can be maintained while effective bleaching can be performed in short time, environment pollution is avoided, and the bleaching method is simple and suitable for being applied and popularized.

Description

technical field

[0001] The invention belongs to the technical field of corn bract bleaching, in particular to a bleaching method for maintaining the mechanical strength of corn bracts. Background technique

[0002] Corn is one of the main crops in China, and its output ranks second in the world. Corn bracts also have a very rich yield as a side material of corn. Corn bracts have high fiber content, compact tissue structure, and strong toughness, and can be used as craft weaving products. As raw materials and fillers for building boards, there are already many related woven products. In order to ensure the durability and aesthetics of corn bracts, it mainly includes material selection, sorting, bleaching, and dyeing. Corn bracts have fiber length, Strong pulling force. The lignin content in corn bracts is about 13%, the hemicellulose is about 30%, and the cellulose is about 32%. It has a rich fiber structure. Due to the special shape, the fibers are densely packed in the head...

Examples

Embodiment 1

[0014] A bleaching method for maintaining the mechanical strength of corn husks, comprising the following steps: soaking pretreated corn husks in a bleaching compound solution, controlling the temperature at 50°C during the soaking process, and the bleaching time is 35 minutes. Ultrasonic treatment with a power of 100W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 65°C until the water content is lower than 15%;

[0015] The bleaching composite solution includes the following raw materials in parts by weight: 50 parts of hydrogen peroxide with a mass concentration of 20%, 7 parts of aluminum monostearate, 3 parts of polyoxyethylene mono-stearate, 1.2 parts of triethanolamine dilaurate, hydroxyl 0.4 parts of carboxylic acid, 0.2 parts of carbamate, 2.5 parts of potassium carbonate, 1.5 parts of activator, 30 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0016] The act...

Embodiment 2

[0021] A bleaching method for maintaining the mechanical strength of corn husks, comprising the following steps: soaking pretreated corn husks in a bleaching compound solution, controlling the temperature at 45°C during the soaking process, and the bleaching time is 30 minutes. Ultrasonic treatment with a power of 120W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 70°C until the water content is lower than 15%;

[0022] The bleaching composite solution includes the following raw materials in parts by weight: 55 parts of hydrogen peroxide with a mass concentration of 20%, 8 parts of aluminum monostearate, 2 parts of polyoxyethylene mono-stearate, 1.5 parts of triethanolamine dilaurate, hydroxyl 0.2 parts of carboxylic acid, 0.3 parts of carbamate, 2 parts of potassium carbonate, 1 part of activator, 40 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0023] The activato...

Embodiment 3

[0028] A bleaching method for maintaining the mechanical strength of corn bracts, comprising the following steps: soaking pretreated corn bracts in a bleaching compound solution, controlling the temperature at 55°C during the soaking process, and the bleaching time is 40 minutes. Ultrasonic treatment with a power of 80W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 60°C until the water content is lower than 15%;

[0029] The bleaching composite solution includes the following raw materials in parts by weight: 45 parts of hydrogen peroxide with a mass concentration of 20%, 6 parts of aluminum monostearate, 4 parts of polyoxyethylene mono-stearate, 0.8 parts of triethanolamine dilaurate, hydroxyl 0.6 parts of carboxylic acid, 0.1 part of carbamate, 3 parts of potassium carbonate, 2 parts of activator, 20 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0030] The activat...

technical field

[0001] The invention belongs to the technical field of corn bract bleaching, in particular to a bleaching method for maintaining the mechanical strength of corn bracts. Background technique

[0002] Corn is one of the main crops in China, and its output ranks second in the world. Corn bracts also have a very rich yield as a side material of corn. Corn bracts have high fiber content, compact tissue structure, and strong toughness, and can be used as craft weaving products. As raw materials and fillers for building boards, there are already many related woven products. In order to ensure the durability and aesthetics of corn bracts, it mainly includes material selection, sorting, bleaching, and dyeing. Corn bracts have fiber length, Strong pulling force. The lignin content in corn bracts is about 13%, the hemicellulose is about 30%, and the cellulose is about 32%. It has a rich fiber structure. Due to the special shape, the fibers are densely packed in the head...

Examples

Embodiment 1

[0014] A bleaching method for maintaining the mechanical strength of corn husks, comprising the following steps: soaking pretreated corn husks in a bleaching compound solution, controlling the temperature at 50°C during the soaking process, and the bleaching time is 35 minutes. Ultrasonic treatment with a power of 100W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 65°C until the water content is lower than 15%;

[0015] The bleaching composite solution includes the following raw materials in parts by weight: 50 parts of hydrogen peroxide with a mass concentration of 20%, 7 parts of aluminum monostearate, 3 parts of polyoxyethylene mono-stearate, 1.2 parts of triethanolamine dilaurate, hydroxyl 0.4 parts of carboxylic acid, 0.2 parts of carbamate, 2.5 parts of potassium carbonate, 1.5 parts of activator, 30 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0016] The act...

Embodiment 2

[0021] A bleaching method for maintaining the mechanical strength of corn husks, comprising the following steps: soaking pretreated corn husks in a bleaching compound solution, controlling the temperature at 45°C during the soaking process, and the bleaching time is 30 minutes. Ultrasonic treatment with a power of 120W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 70°C until the water content is lower than 15%;

[0022] The bleaching composite solution includes the following raw materials in parts by weight: 55 parts of hydrogen peroxide with a mass concentration of 20%, 8 parts of aluminum monostearate, 2 parts of polyoxyethylene mono-stearate, 1.5 parts of triethanolamine dilaurate, hydroxyl 0.2 parts of carboxylic acid, 0.3 parts of carbamate, 2 parts of potassium carbonate, 1 part of activator, 40 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0023] The activato...

Embodiment 3

[0028] A bleaching method for maintaining the mechanical strength of corn bracts, comprising the following steps: soaking pretreated corn bracts in a bleaching compound solution, controlling the temperature at 55°C during the soaking process, and the bleaching time is 40 minutes. Ultrasonic treatment with a power of 80W, ultrasonic treatment is periodic treatment, ultrasonic treatment for 20 seconds every 5 minutes, after completion, dry at a temperature of 60°C until the water content is lower than 15%;

[0029] The bleaching composite solution includes the following raw materials in parts by weight: 45 parts of hydrogen peroxide with a mass concentration of 20%, 6 parts of aluminum monostearate, 4 parts of polyoxyethylene mono-stearate, 0.8 parts of triethanolamine dilaurate, hydroxyl 0.6 parts of carboxylic acid, 0.1 part of carbamate, 3 parts of potassium carbonate, 2 parts of activator, 20 parts of N,N-dimethylformamide, 500 parts of magnetized water;

[0030] The activat...

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