Antistatic viscose fabric and preparation method thereof
Incorporating polyaniline and polypyrrole with dodecylbenzenesulfonic acid as a dopant into viscose fiber through a wet spinning process addresses the conductivity issues of viscose fiber, producing an antistatic fabric with stable conductivity for static charge management.
Patent Information
- Application Number
- CN202310228600.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-10
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2043-03-10
AI Technical Summary
Viscose fiber, being non-conductive, poses challenges for use in antistatic fabrics due to poor compatibility with conductive substances and inadequate conductivity, limiting its application in environments requiring static charge management.
A wet spinning process is employed to incorporate polyaniline and polypyrrole into viscose fiber, enhanced by dodecylbenzenesulfonic acid as a dopant, to improve conductivity, resulting in antistatic viscose fabric through a modified spinning solution preparation.
The resulting antistatic viscose fabric achieves a stable conductivity meeting B-level standards, maintaining resistance and charge levels even after multiple washes, suitable for environments requiring static charge management.
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Figure CN116427046B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to an antistatic viscose fabric and a preparation method thereof. Technical Background
[0002] In daily life, any two objects of different materials can generate static electricity when they come into contact and then separate. This is because when two different objects come into contact with each other, one object loses some charge and becomes positively charged, while the other object gains some charge and becomes negatively charged. If the charges are difficult to neutralize during the separation process, they will accumulate and cause the objects to carry static electricity. Static charges are not terrible. Static electricity on a person's body can sometimes accumulate to tens of thousands of volts. What is terrible is the uneven and violent release of static electricity, which can easily cause circuit breakdown, fire, information interference and other malicious incidents. Therefore, it is very important to prevent static electricity.
[0003] The national standard of "Anti-static Clothing" passed the review of the National Technical Committee for Standardization of Individual Protective Equipment on May 29, 2008, which means that anti-static textiles have officially entered the historical stage, especially in the electrical manufacturing, medical and health, and petrochemical industries, the use of anti-static textiles is of great significance. Since the fabrics that rely on coatings to obtain anti-static functions are difficult to resist washing and friction, they are gradually eliminated, and new anti-static finishing technologies are increasingly valued. With the rapid development of the electronics industry, petrochemical industry, medical and health industries, the requirements for production and working environments will become higher and higher, and the awareness of individual protection will gradually increase. Therefore, the development and application of anti-static textiles such as high-quality, comfortable and cost-effective anti-static fibers, anti-static fabrics and corresponding anti-static clothing have become the goal of the majority of textile scientific research workers.
[0004] Viscose fiber is a cellulose fiber. It is made from natural fibers (wood fibers, cotton linters) through processes such as alkalization, aging, and sulfonation to produce soluble cellulose xanthate, which is then dissolved in dilute alkali solution to produce viscose, which is then made through wet spinning.
[0005] Viscose fiber is not conductive, so it is difficult to use it in the field of antistatic fabrics. The spinning solution of viscose fiber has poor compatibility with conductive substances and is not easy to spin. Although some conductive substances can be mixed into the viscose fiber spinning solution, their conductive effect is poor, and the prepared viscose fiber therefore has poor conductivity. It is difficult to use viscose fiber in antistatic fabrics.
[0006] Technical Solution
[0007] In view of the defects of the prior art, the first object of the present invention is to provide an antistatic viscose fabric, which has good antistatic function.
[0008] The antistatic viscose fabric of the present invention can be prepared by the following method: first, using aniline, pyrrole, dodecylbenzenesulfonic acid aqueous solution, ferric chloride and ammonium persulfate aqueous solution as raw materials to prepare a modified liquid; secondly, mixing the modified liquid with viscose fiber spinning liquid to prepare a mixed spinning liquid; thirdly, preparing viscose fiber by a wet spinning process; finally, spinning and weaving the prepared fiber bundles to prepare the antistatic viscose fabric.
[0009] The second object of the present invention is to provide a method for preparing an antistatic viscose fabric, comprising the following steps:
[0010] (1) Preparation of modified solution: Aniline, pyrrole and aqueous dodecylbenzenesulfonic acid solution were mixed in an ice bath, stirred, and then an aqueous ammonium persulfate solution containing ferric chloride was added to start the reaction. The reaction was carried out under mechanical stirring for 100 to 120 minutes to obtain a modified solution.
[0011] Preferably, the dosage ratio of the aniline, pyrrole, dodecylbenzenesulfonic acid aqueous solution, ferric chloride and ammonium persulfate aqueous solution is 1 mL: (1-2) mL: (20-40) mL: (0.1-0.3) g: (20-40) mL; the concentration of the dodecylbenzenesulfonic acid aqueous solution is 0.1-0.3 wt %, and the concentration of the ammonium persulfate aqueous solution is 0.4-0.6 wt %.
[0012] (2) Mixing: The modified solution prepared in step (1) is mixed with the viscose fiber spinning solution to obtain a mixed spinning solution.
[0013] Preferably, the dosage ratio of the modified liquid to the viscose fiber spinning solution is 1 mL: (10-20) mL.
[0014] (3) Spinning: Viscose fibers are prepared by wet spinning process, such as Figure 1 As shown; the mixed spinning solution prepared in step (2) is first passed through a metering pump and a filter, and then ejected from the spinneret hole directly into a coagulation bath to solidify into a fiber bundle, and then passed through two drawing rollers and a winding roller to obtain a fiber bundle.
[0015] Preferably, the relevant parameters of the wet spinning process are set as follows: spinning speed is 16-18 m / min, metering pump speed is 25-27 rpm, spinneret specification is SPN1400×08, winding roller is 22-24 m / min, sodium hydroxide concentration is 10-11 g / L, coagulation bath concentration is 30%-60%, coagulation bath temperature is 45°C-55°C, and drying temperature is 105-110°C.
[0016] (4) Weaving: spinning and weaving the fiber bundles obtained in step (3) to obtain antistatic viscose fabrics.
[0017] The relevant mechanism analysis of the present invention is as follows: aniline is polymerized in the presence of ammonium persulfate as an initiator to generate polyaniline, and pyrrole is oxidatively polymerized in the presence of ferric chloride as an oxidant to generate polypyrrole; dodecylbenzenesulfonic acid is used as a dopant to improve the conductivity of polyaniline and polypyrrole. Polyaniline and polypyrrole are mixed into the viscose fiber spinning solution, and the prepared viscose fiber also has conductivity and is used for antistatic fabrics.
[0018] Compared with the prior art, the advantages and beneficial effects of the present invention are:
[0019] (1) Viscose fiber is not conductive. The present invention adopts a wet spinning process to prepare viscose fiber containing polyaniline and polypyrrole. The prepared viscose fiber is conductive and can be used for antistatic fabrics.
[0020] (2) The present invention uses polyaniline and polypyrrole to be composited into viscose fiber to improve the conductivity of viscose fiber. The comparative example shows that the conductivity of viscose fiber composited with polyaniline and polypyrrole is significantly higher than that of viscose fiber composited with polyaniline or polypyrrole alone.
[0021] (3) The present invention uses dodecylbenzene sulfonic acid as a dopant, which can significantly improve the conductivity of polyaniline and polypyrrole; thus, it is beneficial to use them as raw materials for antistatic fabrics.
[0022] (4) According to the test method of GB 12014-2009, the point-to-point resistance of the antistatic viscose fabric prepared by the present invention reaches 4.5×10 7 ~4.9×10 7 Ω, the electric charge reaches 0.23-0.26μC / piece, reaching the B-level technical standard; after 20 washes, the point-to-point resistance and the electric charge do not change significantly, indicating that the viscose fabric prepared by the present invention has a stable antistatic function. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 Process flow chart of wet spinning of viscose fiber DETAILED DESCRIPTION
[0024] Example 1
[0025] An antistatic viscose fabric is prepared by the following method:
[0026] (1) Preparation of modified liquid: 10 mL of aniline, 15 mL of pyrrole and 300 mL of 0.2 wt % aqueous dodecylbenzenesulfonic acid solution were mixed in an ice bath, stirred, and then 300 mL of 0.5 wt % aqueous ammonium persulfate solution containing 2 g of ferric chloride was added to start the reaction. The reaction was allowed to react for 110 minutes under mechanical stirring to obtain a modified liquid.
[0027] (2) Mixing: 100 mL of the modified solution prepared in step (1) is mixed with 1500 mL of viscose fiber spinning solution to prepare a mixed spinning solution.
[0028] (3) Spinning: Viscose fibers are prepared by wet spinning process, such as Figure 1 As shown; the mixed spinning solution prepared in step (2) is first passed through a metering pump and a filter, and then ejected from the spinneret hole directly into a coagulation bath to solidify into a fiber bundle, and then passed through two drawing rollers and a winding roller to obtain a fiber bundle.
[0029] The relevant parameters of the wet spinning process are set as follows: spinning speed is 17m / min, metering pump speed is 26rpm, spinneret specification is SPN1400×08, winding roller is 23m / min, sodium hydroxide concentration is 10.5g / L, coagulation bath concentration is 45%, coagulation bath temperature is 50°C, and drying temperature is 108°C.
[0030] (4) Weaving: The fiber bundle obtained in step (3) is spun and woven to obtain an antistatic viscose fabric a.
[0031] Example 2
[0032] An antistatic viscose fabric is prepared by the following method:
[0033] (1) Preparation of modified liquid: 10 mL of aniline, 10 mL of pyrrole and 200 mL of 0.1 wt % aqueous dodecylbenzenesulfonic acid solution were mixed in an ice bath, stirred, and then 200 mL of 0.4 wt % aqueous ammonium persulfate solution containing 1 g of ferric chloride was added to start the reaction. The reaction was allowed to proceed for 100 minutes under mechanical stirring to obtain a modified liquid.
[0034] (2) Mixing: 100 mL of the modified solution prepared in step (1) is mixed with 1000 mL of viscose fiber spinning solution to prepare a mixed spinning solution.
[0035] (3) Spinning: Viscose fibers are prepared by wet spinning process, such as Figure 1 As shown; the mixed spinning solution prepared in step (2) is first passed through a metering pump and a filter, and then ejected from the spinneret hole directly into a coagulation bath to solidify into a fiber bundle, and then passed through two drawing rollers and a winding roller to obtain a fiber bundle.
[0036] The relevant parameters of the wet spinning process are set as follows: spinning speed is 16m / min, metering pump speed is 25rpm, spinneret specification is SPN1400×08, winding roller is 22m / min, sodium hydroxide concentration is 10g / L, coagulation bath concentration is 30%, coagulation bath temperature is 45°C, and drying temperature is 105°C.
[0037] (4) Weaving: The fiber bundle obtained in step (3) is spun and woven to obtain an antistatic viscose fabric b.
[0038] Example 3
[0039] An antistatic viscose fabric is prepared by the following method:
[0040] (1) Preparation of modified liquid: 10 mL of aniline, 20 mL of pyrrole and 400 mL of 0.3 wt % aqueous dodecylbenzenesulfonic acid solution were mixed in an ice bath, stirred, and then 400 mL of 0.6 wt % aqueous ammonium persulfate solution containing 3 g of ferric chloride was added to start the reaction. The reaction was allowed to proceed for 120 minutes under mechanical stirring to obtain a modified liquid.
[0041] (2) Mixing: 100 mL of the modified solution prepared in step (1) is mixed with 2000 mL of viscose fiber spinning solution to prepare a mixed spinning solution.
[0042] (3) Spinning: Viscose fibers are prepared by wet spinning process, such as Figure 1 As shown; the mixed spinning solution prepared in step (2) is first passed through a metering pump and a filter, and then ejected from the spinneret hole directly into a coagulation bath to solidify into a fiber bundle, and then passed through two drawing rollers and a winding roller to obtain a fiber bundle.
[0043] The relevant parameters of the wet spinning process are set as follows: spinning speed is 18m / min, metering pump speed is 27rpm, spinneret specification is SPN1400×08, winding roller is 24m / min, sodium hydroxide concentration is 11g / L, coagulation bath concentration is 60%, coagulation bath temperature is 55°C, and drying temperature is 110°C.
[0044] (4) Weaving: The fiber bundle obtained in step (3) is spun and woven to obtain an antistatic viscose fabric c.
[0045] Comparative Example A
[0046] Taking Example 1 as a comparison, in this comparative example A, aniline was not added, that is, the step (1) of "mixing 10 mL of aniline, 15 mL of pyrrole and 300 mL of 0.2 wt % aqueous dodecylbenzenesulfonic acid solution" was adjusted to "mixing 15 mL of pyrrole and 300 mL of 0.2 wt % aqueous dodecylbenzenesulfonic acid solution", and the other preparation methods were implemented according to the preparation method of Example 1 to obtain antistatic viscose fabric d.
[0047] Comparative Example B
[0048] In contrast to Example 1, in this comparative example B, pyrrole is not added, that is, the step (1) of "mixing 10 mL of aniline, 15 mL of pyrrole and 300 mL of a 0.2 wt % aqueous solution of dodecylbenzenesulfonic acid" is adjusted to "mixing 10 mL of aniline and 300 mL of a 0.2 wt % aqueous solution of dodecylbenzenesulfonic acid", and the other preparation methods are implemented according to the preparation method of Example 1 to obtain an antistatic viscose fabric e.
[0049] Comparative Example C
[0050] Taking Example 1 as a comparison, in this comparative example C, the type of dopant is changed, that is, the "dodecylbenzenesulfonic acid" in step (1) is adjusted to "hydrochloric acid", and the other preparation methods are implemented according to the preparation method of Example 1 to obtain an antistatic viscose fabric f.
[0051] Performance evaluation test:
[0052] The antistatic viscose fabrics a, b, c, d, e and f prepared in the above-mentioned specific embodiments 1 to 3 and comparative examples A to C of the present invention are selected. The antistatic function test refers to GB 12014-2009 "Antistatic Clothing", and the point-to-point resistance and the amount of electric charge are used as antistatic function evaluation indicators. Among them, the point-to-point resistance refers to the test method of Appendix A of GB 12014-2009, and the amount of electric charge refers to the test method of Appendix B of GB 12014-2009, and the test conditions are: temperature: (20±5)℃, relative humidity: (35±5)%. The test results are shown in Table 1.
[0053] Table 1
[0054]
[0055]
[0056] As can be seen from Table 1, the point-to-point resistance and the amount of electric charge of the antistatic viscose fabrics a, b, c, d, e and f prepared by Examples 1 to 3 and Comparative Examples A to C are compared, and it can be seen that Examples 1 to 3 are significantly better than Comparative Examples A to C in terms of antistatic index. The performance evaluation test results show that the addition of polyaniline, the addition of polypyrrole and the type of dopant all have an important influence on the antistatic function of the viscose fabric.
Claims
1. A method for preparing an antistatic viscose fabric, characterized in that: The preparation method comprises the following steps: (1) Preparation of modified solution: Aniline, pyrrole and aqueous solution of dodecylbenzenesulfonic acid were mixed under ice bath conditions, stirred, and then an aqueous solution of ammonium persulfate containing ferric chloride was added to start the reaction. The reaction was carried out under mechanical stirring for 100 to 120 minutes to obtain a modified solution; (2) mixing: mixing the modified solution prepared in step (1) with the viscose fiber spinning solution to obtain a mixed spinning solution; (3) Spinning: The viscose fiber is prepared by a wet spinning process. The mixed spinning solution prepared in step (2) is first passed through a metering pump and a filter, and then ejected from a spinneret hole and directly enters a coagulation bath to solidify into a fiber bundle. The fiber bundle is then passed through two drafting rollers and a winding roller to obtain a fiber bundle. (4) Weaving: spinning and weaving the fiber bundle obtained in step (3) to obtain an antistatic viscose fabric; Wherein, the amount ratio of aniline, pyrrole, aqueous dodecylbenzenesulfonic acid solution, ferric chloride and aqueous ammonium persulfate solution in step (1) is 1 mL: (1-2) mL: (20-40) mL: (0.1-0.3) g: (20-40) mL; the concentration of the aqueous dodecylbenzenesulfonic acid solution is 0.1-0.3 wt %, and the concentration of the aqueous ammonium persulfate solution is 0.4-0.6 wt %.
2. The method for preparing an antistatic viscose fabric according to claim 1, characterized in that: The dosage ratio of the modified liquid to the viscose fiber spinning solution in step (2) is 1 mL: (10-20) mL.
3. The method for preparing an antistatic viscose fabric according to claim 1, characterized in that: The relevant parameters of the wet spinning process described in step (3) are set as follows: the spinning speed is 16-18 m / min, the metering pump speed is 25-27 rpm, the spinneret specification is SPN1400×08, the winding roller is 22-24 m / min, the sodium hydroxide concentration is 10-11 g / L, the coagulation bath concentration is 30%-60%, the coagulation bath temperature is 45°C-55°C, and the drying temperature is 105-110°C. 4.An antistatic viscose fabric, characterized in that: The invention is prepared by the method according to any one of claims 1 to 3.