Purple lyocell fabric dyed by animal dye lac and preparation method of purple lyocell fabric

Abstract

The invention relates to a purple lyocell fabric dyed by animal dye lac and a preparation method of the purple lyocell fabric. The method comprises the following steps: extracting purple pigment from lac through an aqueous solution to prepare lac purple pigment, preparing a phenol oxidase solution and a cellulase solution, preparing a dyeing solution from the lac purple pigment, the phenol oxidase solution, the cellulase solution, an H2O2 solution and the like, and putting manganese dioxide, lyocell fabric and the dyeing solution into a dyeing machine for dyeing. The dyed lyocell fabric is subjected to enzyme deactivation, then washed with tap water and dried, and the purple lyocell fabric is obtained. Cellulase and polyphenol oxidase are selected to activate the cellulose and the purple pigment respectively, so that graft polymerization reaction of the cellulose and the purple pigment is realized. The dyeing conditions are mild, and the pollution to the environment is small; the dyed purple lyocell fabric has a relatively high K / S value, and the soaping fastness and the dry rubbing fastness are relatively high in grade.

Description

technical field

[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to a purple lyocell fabric prepared by dyeing with animal dye lac insects and a preparation method thereof. Background technique

[0002] As early as thousands of years ago, people have learned to obtain colors from animals and plants to decorate their clothing. Animal dyes are represented by ancient violet, which uses yellow liquid secreted by snails along the coast of Asia Minor in the Mediterranean, and oxidizes it to become a beautiful purple dye; in addition, dye plants include henna and bluegrass that we are familiar with. In modern times, synthetic dyes have gradually replaced natural animal and plant dyes because of their colorful, cheap and durable, and natural dyes have gradually withdrawn from the stage of history. Since the 21st century, people's pursuit of health, environmental protection and ecological awareness has been increasing, and synthetic...

Examples

Embodiment 1

[0036] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0037] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:3 (g / mL); then extract twice with 7 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.2mol / L sodium hydroxide and 0.2mol / L calcium chloride, the amount of the mixed solution is 5% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 2.5, stand for 3.5h, and filter to collect the filtrate; Add 10wt% sulfuric acid to the filtrate until no more pigment crystals are precipitated, then filter with filter paper. After the filtrate is allowed to stand for 2.5 d, the pigment crystals are precipitated, filtered and washed with water for 3 times, and dried at 55°C to obtain the lac worm purple pigment.

[0038] (2) Preparation of enzyme solution: Preparation...

Embodiment 2

[0043] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0044] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:2 (g / mL); then extract twice with 5 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.1mol / L sodium hydroxide and 0.1mol / L calcium chloride, the amount of the mixed solution is 4% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 2.0, stand for 3h, filter and collect the filtrate; Add 10wt% sulfuric acid until no more pigment crystals are precipitated, filter with filter paper, and precipitate the pigment crystals after the filtrate is allowed to stand for 2 d, filter and wash with water for 3 times, and dry at 50°C to obtain lac worm purple pigment.

[0045] (2) Preparation of enzyme solution: Preparation of polyphenol oxidase solution: Disso...

Embodiment 3

[0050] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0051] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:4 (g / mL); then extract twice with 10 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.3mol / L sodium hydroxide and 0.3mol / L calcium chloride, the amount of the mixed solution is 6% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 3.0, stand for 4h, filter and collect the filtrate; Add 10wt% sulfuric acid until no more pigment crystals are precipitated, filter with filter paper, after the filtrate is allowed to stand for 3 days, the pigment crystals are precipitated, filter and wash with water for 3 times, and dry at 60 ° C to obtain the purple pigment of lac worms.

[0052] (2) Preparation of enzyme solution: Preparation of polyphenol oxidase...

technical field

[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to a purple lyocell fabric prepared by dyeing with animal dye lac insects and a preparation method thereof. Background technique

[0002] As early as thousands of years ago, people have learned to obtain colors from animals and plants to decorate their clothing. Animal dyes are represented by ancient violet, which uses yellow liquid secreted by snails along the coast of Asia Minor in the Mediterranean, and oxidizes it to become a beautiful purple dye; in addition, dye plants include henna and bluegrass that we are familiar with. In modern times, synthetic dyes have gradually replaced natural animal and plant dyes because of their colorful, cheap and durable, and natural dyes have gradually withdrawn from the stage of history. Since the 21st century, people's pursuit of health, environmental protection and ecological awareness has been increasing, and synthetic...

Examples

Embodiment 1

[0036] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0037] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:3 (g / mL); then extract twice with 7 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.2mol / L sodium hydroxide and 0.2mol / L calcium chloride, the amount of the mixed solution is 5% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 2.5, stand for 3.5h, and filter to collect the filtrate; Add 10wt% sulfuric acid to the filtrate until no more pigment crystals are precipitated, then filter with filter paper. After the filtrate is allowed to stand for 2.5 d, the pigment crystals are precipitated, filtered and washed with water for 3 times, and dried at 55°C to obtain the lac worm purple pigment.

[0038] (2) Preparation of enzyme solution: Preparation...

Embodiment 2

[0043] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0044] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:2 (g / mL); then extract twice with 5 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.1mol / L sodium hydroxide and 0.1mol / L calcium chloride, the amount of the mixed solution is 4% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 2.0, stand for 3h, filter and collect the filtrate; Add 10wt% sulfuric acid until no more pigment crystals are precipitated, filter with filter paper, and precipitate the pigment crystals after the filtrate is allowed to stand for 2 d, filter and wash with water for 3 times, and dry at 50°C to obtain lac worm purple pigment.

[0045] (2) Preparation of enzyme solution: Preparation of polyphenol oxidase solution: Disso...

Embodiment 3

[0050] The preparation method of the purple lyocell fabric obtained by dyeing the animal dye lac insect, the specific method comprises the following steps:

[0051] (1) Extraction of pigment: Grind lac worms with water, and the ratio of material to liquid is 1:4 (g / mL); then extract twice with 10 times of water, centrifuge the extract to remove slag, add to the extract A mixed solution of 0.3mol / L sodium hydroxide and 0.3mol / L calcium chloride, the amount of the mixed solution is 6% of the amount of the extract, add 3wt% hydrochloric acid to adjust the pH value to 3.0, stand for 4h, filter and collect the filtrate; Add 10wt% sulfuric acid until no more pigment crystals are precipitated, filter with filter paper, after the filtrate is allowed to stand for 3 days, the pigment crystals are precipitated, filter and wash with water for 3 times, and dry at 60 ° C to obtain the purple pigment of lac worms.

[0052] (2) Preparation of enzyme solution: Preparation of polyphenol oxidase...

Images