A method of ammonification modification of ramie fiber and its application method in liquid ammonia solvent dyeing

A ramie fiber modification technology, which is applied in the ammonification modification field of ramie fiber, achieves the effects of reducing environmental pollution, shortening dyeing time, and solving uneven color difference

Active Publication Date: 2018-09-25
博森纺织科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the report of the ammonification modification of ramie fiber is less, wherein, there is a patent report about the amination modification of ramie fiber, and the application number is that the patent application of 88100237.2 discloses a kind of ramie fiber amination modification process, the The invention uses sodium hydroxide solution to decrystallize ramie fiber, and then uses 1-chloro-2-hydroxypropyltrialkylammonium chloride as an aminating agent to carry out amination reaction, which effectively realizes the introduction of A charged cationic amine group whose chemical structure is However, the present invention introduces uncharged amino groups on the surface of the fibers, whose chemical structural formula is -NH 2 , which is fundamentally different from the former

Method used

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  • A method of ammonification modification of ramie fiber and its application method in liquid ammonia solvent dyeing
  • A method of ammonification modification of ramie fiber and its application method in liquid ammonia solvent dyeing
  • A method of ammonification modification of ramie fiber and its application method in liquid ammonia solvent dyeing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Pretreatment of ramie fiber: choose ramie yarn for ramie fiber, put 200mL of ramie yarn into 200mL NaOH solution with a concentration of 15%, heat it to 50°C, keep it warm for 4h, and wash it with tap water until the eluate When the pH is 7.6, the pretreated yarn is obtained.

[0027] (2) Modification method: add 10mL formaldehyde, 1mL boric acid and 150mL deionized water into a 250ml three-necked flask, stir evenly, add the 1g ramie yarn after the pretreatment of step (1), and raise the reaction temperature to 40 ℃, then feed ammonia gas, reflux and stir the reaction for 3 hours, after the reaction is completed, take out the yarn, wash it with deionized water, and dry the yarn when the pH of the eluate is 6-7, and the ammoniated modified Sexual ramie yarn.

[0028] (3) Elemental analysis of the modified yarn and the unmodified yarn was performed, and the following results were obtained:

[0029]

[0030] From the elemental analysis results, it can be seen that...

Embodiment 2

[0035] (1) Pretreatment of ramie fiber: choose ramie yarn for ramie fiber, put 200mL of ramie yarn into 200mL NaOH solution with a concentration of 15%, heat it to 50°C, keep it warm for 4h, and wash it with tap water until the eluate When the pH is 7.3, the pretreated yarn is obtained.

[0036] (2) Modification method: add 12mL formaldehyde in 250ml three-necked flask, 1.5mL boric acid and 150mL deionized water, stir evenly, add the 1g ramie yarn after the pretreatment of step (1), temperature of reaction is raised to At 40°C, add ammonia gas, reflux and stir for 3 hours. After the reaction is completed, take out the yarn and rinse it with deionized water. When the pH of the eluate is 6-7, dry the yarn to obtain ammoniated product. Modified ramie yarn.

[0037] (3) Elemental analysis of the modified yarn and the unmodified yarn was performed, and the following results were obtained:

[0038]

[0039] From the elemental analysis results, it can be seen that after the ramie ...

Embodiment 3

[0044] (1) Pretreatment of ramie fiber: choose ramie yarn for ramie fiber, put 200mL of ramie yarn into 200mL NaOH solution with a concentration of 15%, heat it to 50°C, keep it warm for 4h, and wash it with tap water until the eluate When the pH is 7.1, the pretreated yarn is obtained.

[0045] (2) Modification method: add 12mL formaldehyde in 250ml three-necked flask, 1.5mL boric acid and 150mL deionized water, stir evenly, add the 1g ramie yarn after the pretreatment of step (1), temperature of reaction is raised to At 40°C, add ammonia gas, reflux and stir for 3 hours. After the reaction is completed, take out the yarn and rinse it with deionized water. When the pH of the eluate is 6-7, dry the yarn to obtain ammoniated product. Modified ramie yarn.

[0046] (3) Elemental analysis of the modified yarn and the unmodified yarn was performed, and the following results were obtained:

[0047]

[0048] From the elemental analysis results, it can be seen that after the rami...

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Abstract

The invention relates to an ammoniation modification method of ramine fibers and an application method thereof in liquid ammonia solvent dyeing, and belongs to the technical field of textile chemistry. The ammoniation modification method comprises the following steps: pretreatment of the ramine fibers: selecting ramine yarns from the ramine fibers, placing the ramine yarns in a 200 mL of NaOH solution of which the concentration is 15%, heating to the temperature of 50 DEG C, insulating for 4 hours, and cleaning with running water until pH of eluate is 7-8 to obtain pretreated yarns; modification to the pretreated yarns: adding 10-15 mL of formaldehyde, 1-2 mL of boracic acid and 150 mL of deionized water in a three-necked flask with the volume of 250 ml, stirring uniformly, adding the pretreated ramine yarns, heating the reaction temperature to be 40 DEG C, feeding ammonia, refluxing, stirring and reacting for 3 hours, taking out the yarns after reaction is finished, washing with the deionized water, and drying the yarns after pH of the eluate is 6-7 to obtain the ammoniation modified ramine yarns. The ammoniation modification method of the ramine fibers is used in ramine fiber liquid ammonia solvent dyeing, and dyeing uniformity of the ramine fibers can be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of textile chemistry, and in particular relates to an ammonification modification method of ramie fiber and its application method in liquid ammonia solvent dyeing. Background technique [0002] The textile industry is a traditional pillar industry of my country's national economy and an important livelihood industry. It is also an industry with obvious international competitive advantages. Ramie fiber is one of the main raw materials for textile fabrics and occupies an important position in textile fabrics. my country is one of the countries with the richest hemp resources in the world, mainly including ramie, sisal hemp, flax and jute kenaf, etc. Among them, ramie is widely planted in my country because of its fast growth rate, high yield and easy survival. The fabric made of ramie fiber has the advantages of breathability, moisture absorption and perspiration, and is an ideal summer high-grade clothing fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/38D06M11/60D06M13/127D06P1/38D06P3/66D06M101/06
CPCD06M11/38D06M11/60D06M13/127D06M2101/06D06P1/38D06P3/66
Inventor 蔡映杰彭雄义王强李玉广娄看看
Owner 博森纺织科技股份有限公司
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