A fiber with high efficiency negative ion release function and a preparation method thereof

Abstract

The application discloses a kind of fiber with high efficiency negative ion release function and preparation method thereof, comprising, preparation has the powder of negative ion release function, after being prepared into nanometer powder by liquid grinding treatment, dispersed into modified polyethylene glycol solution medium, and further using hydration kettle to further concentrate and stabilize treatment, obtain the modified polyethylene glycol nanometer dispersion slurry of negative ion release function;With the nanometer slurry of negative oxygen ion release, caprolactam, hydroxyl polyethylene glycol carboxyl monomer, catalytic aid is blended, and in-situ polymerization is carried out to prepare polyamide chip;Polyamide chip is dried, and fed into the feeder of spinning machine to carry out melt spinning, and obtain the polyamide fiber with high efficiency release negative ion.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of functional textile materials, and particularly relates to a fiber with high-efficiency negative ion release function and a preparation method thereof. BACKGROUND

[0002] Negative ions are a kind of gas ions with negative charge in the air. The free electrons generated by the ionization of air molecules under the action of high pressure or strong rays are mostly obtained by oxygen, so air negative ions are often collectively referred to as "negative oxygen ions". Negative ions are also known as "air vitamin", and the concentration thereof is a sign of whether the air is fresh. When people are in places with high negative ion content such as seashores, waterfalls and forests, they will feel fresh, breathe easily and be full of energy. However, when people are in places with low negative ion content such as air-conditioned rooms and streets, they will feel breathless, dizzy and lack of energy.

[0003] As an important supplement to natural negative ions, a large amount of research has been conducted on negative ion textile fibers. The problem of negative ion release has been an important topic in the development of functional chemical fiber fabrics. Currently, there are some solutions, such as solving the problem from the source of the fiber, i.e., preparing negative ion release fibers by using high additive amount and composite spinning technology. The negative ion release powder used is rare earth, tourmaline, germanium oxide and other materials. Fabrics prepared from these fibers fully meet the requirements of fabric negative ion release.

[0004] At present, most of the fabrics on the market are prepared by using negative ion release finishing to realize the negative ion release function of the fabric. This method has lower cost and more significant effect compared with the use of negative ion release fibers, and is therefore used by most fabric manufacturers. However, this method has unavoidable defects, including:

[0005] 1. Sustainability problem: the negative ion release effect may weaken over time. Because the negative ion release finishing forms a negative ion release layer on the fabric through special treatment agents, this layer may gradually wear out or be contaminated, thereby reducing its release effect.

[0006] 2. Sustainability problem: the negative ion release effect may weaken over time. Because the negative ion release finishing forms a negative ion release layer on the fabric through special treatment agents, this layer may gradually wear out or be contaminated, thereby reducing its release effect.

[0007] Uneven coating: during the negative ion release finishing, the coating may be unevenly distributed on the fabric. This may result in better negative ion release effect in some areas and poorer effect in other areas, thereby affecting the overall negative ion release effect. SUMMARY

[0008] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions are not to be construed as limiting the scope of the present application.

[0009] In view of the above and / or problems existing in the prior art, the present application is proposed.

[0010] Therefore, the purpose of the present application is to overcome the deficiencies in the prior art, and to provide a preparation method of a fiber with high-efficiency negative ion release function.

[0011] To solve the above technical problems, the present application provides the following technical solutions: including,

[0012] The nanometer concentrated slurry with negative ion release function, the hydroxyl polyvinyl alcohol carboxyl monomer and the caprolactam are blended, and water is used as a ring-opening agent to obtain polyamide chips by in-situ polymerization. After drying the chips, melt spinning is performed, and a fiber with high-efficiency negative ion release function is obtained

[0013] The nanometer concentrated slurry with negative ion release function includes negative oxygen ion powder and a dispersing agent. The negative oxygen ion powder includes nanometer titanium dioxide, lanthanide rare earth elements and tourmaline superfine powder. The dispersing agent includes modified polyethylene glycol. The addition amount of the nanometer concentrated slurry is 0.2-2% of the caprolactam.

[0014] The molecular weight of the hydroxyl polyvinyl alcohol carboxyl monomer is 600-2000, and the addition amount is 2-7% of the caprolactam.

[0015] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the nanometer concentrated slurry with negative ion release function is obtained by placing the negative oxygen ion powder after liquid phase grinding in a hydration kettle reaction and concentrating, and the solid content of the concentrated slurry is 40-50%.

[0016] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the mass percentage of the negative oxygen ion powder is 5-10% for nanometer titanium dioxide, 15-25% for lanthanide rare earth elements and 65-80% for tourmaline superfine powder.

[0017] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the grinding time of the liquid phase grinding is 2-6h, the particle size of the ground powder is 80-150nm, the grinding medium is a modified polyethylene glycol aqueous solution, and the powder concentration is 10-30%.

[0018] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the reaction temperature in the hydration kettle reaction is 60-150 DEG C, and the reaction time is 3-6h.

[0019] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the in-situ polymerization is divided into ring-opening prepolymerization, post-polycondensation, water extraction purification and drying, wherein the ring-opening prepolymerization temperature is 140-180 DEG C, and the time is 40-80 min.

[0020] The post-polycondensation temperature is 230-270 DEG C, and the time is 3-6h.

[0021] The boiling water extraction is performed for 20-28h, and the bath ratio is 1:1.

[0022] The drying temperature is 80-120 DEG C, and the drying time is 4-8h.

[0023] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the ring-opening prepolymerization in the in-situ polymerization uses water as the ring-opening agent, and caprolactam as the polymerization monomer, wherein the water addition amount is 1-3% of the caprolactam.

[0024] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, phosphoric acid is used as the catalytic efficiency regulator in the in-situ polymerization.

[0025] As a preferred scheme of the preparation method of the fiber with high-efficiency negative ion release function, the spinning temperature in the melt spinning is 255-290 DEG C, the spinning speed is 600-3000 m / min, and the initial pressure of the spinning assembly is 8-16 MPa.

[0026] Another object of the present application is to provide a fiber with high-efficiency negative ion release function.

[0027] The present application has the following beneficial effects:

[0028] The present application provides a fiber with high-efficiency negative ion release function, which is prepared by copolymerizing 4% hydroxyl polyvinyl alcohol carboxyl segments in caprolactam segments to prepare polyester chips containing negative ion release function powder, so as to effectively improve the negative ion release efficiency of the fiber. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the description examples.

[0030] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific examples disclosed below.

[0031] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0032] The present application tests the negative ion release effect in the fiber according to the test standard of GB / T 30128-2013.

[0033] The molecular weight of the hydroxyl polyethylene glycol carboxyl used in the specific embodiments of the present application is 1500.

[0034] The other raw materials used in the present application are commercially available in the art without special instructions.

[0035] Example 1

[0036] The present embodiment provides a fiber with high-efficiency negative ion release function, specifically:

[0037] 1) Preparation of negative ion release functional nano concentrated slurry:

[0038] 8 parts of nano titanium dioxide, 20 parts of lanthanum element negative ion powder and 72 parts of tourmaline superfine powder are mixed in pure water to obtain a powder solution with a powder concentration of 20%;

[0039] 2% of hydroxyl polyethylene glycol carboxyl is added to the powder solution for nano liquid grinding, the grinding time is 4h, the powder particle size is ground to 120nm, and a hydroxyl polyethylene glycol carboxyl suspension solution is obtained;

[0040] The hydroxyl polyethylene glycol carboxyl suspension solution is reacted in a hydration kettle, the reaction temperature is 80℃, the reaction time is 5h, and the negative ion release functional nano concentrated slurry with a solid content of 45% is prepared after reaction and concentration;

[0041] 2) Preparation of polyamide chip:

[0042] The nano-concentrated slurry with negative ion release function is added into caprolactam at 2.0% solid content of caprolactam, and hydroxyl polyvinyl alcohol carboxyl monomer is added at 4% of caprolactam, and water is used as ring-opening agent, phosphoric acid is added as reaction efficiency regulator at 0.1% of the nano-concentrated slurry with negative ion release function, the ring-opening prepolymerization temperature is 160°C, the time is 70 min, the post-polycondensation temperature is 260°C, and the time is 4 h; boiling water extraction is performed for 24 h, the bath ratio is 1:1; the drying temperature is 100°C, and the drying time is 6 h, to obtain polyamide chips;

[0043] 3) Preparation of fibers with high-efficiency negative ion release function;

[0044] The polyamide chips are fed into the feeder of the spinning machine after drying for melt spinning, the spinning temperature is 270°C, the spinning speed is 2200 m / min, the initial pressure of the spinning assembly is 11 MPa, and the spinning fiber diameter is set to 1D, to obtain high-efficiency negative ion release fibers.

[0045] Comparative Example 1

[0046] The difference between this comparative example and Example 1 is that the hydroxyl polyvinyl alcohol carboxyl dispersant in step 1) is adjusted to polyethylene glycol, and the remaining process steps are the same as those in Example 1, to obtain the negative ion release fibers of this comparative example.

[0047] Comparative Example 2

[0048] The difference between this comparative example and Example 1 is that no hydroxyl polyvinyl alcohol carboxyl monomer is added in step 2), and the remaining process steps are the same as those in Example 1, to obtain the negative ion release fibers of this comparative example.

[0049] Comparative Example 3

[0050] The difference between this comparative example and Example 1 is that the hydroxyl polyvinyl alcohol carboxyl dispersant in step 1) is adjusted to polyethylene glycol, and no hydroxyl polyvinyl alcohol carboxyl monomer is added in step 2), and the remaining process steps are the same as those in Example 1, to obtain the negative ion release fibers of this comparative example.

[0051] Comparative Example 4

[0052] The difference between this comparative example and Example 1 is that the nano-titanium dioxide in step 1) is adjusted to nano-silicon dioxide, and the remaining process steps are the same as those in Example 1, to obtain the negative ion release fibers of this comparative example.

[0053] Comparative Example 5

[0054] The difference between this comparative example and Example 1 is that the nano-titanium dioxide in step 1) is adjusted to lanthanum element negative ion powder, and the remaining process steps are the same as those in Example 1, to obtain the negative ion release fibers of this comparative example.

[0055] The negative ion release amount of the fibers prepared in Example 1 and Comparative Examples 1-5 was measured at 23°C, 50% humidity and 37°C, 70% humidity, and the results are shown in Table 1.

[0056] Table 1

[0057]

[0058] As can be seen from Table 1, whether or not the hydroxyl polyethylene glycol carboxyl is added has a significant effect on the negative ion release effect of the prepared fiber, because the active sites in the fiber can be provided and the interaction between the fiber and the negative ion release nano powder is enhanced during the preparation of the application, thereby further increasing the release effect of the negative ions.

[0059] The reaction effect of different types of negative ion release nano powder and hydroxyl polyethylene glycol carboxyl may be different, some nano powder may have a strong chemical reaction with hydroxyl polyethylene glycol carboxyl, forming a stable compound, thereby changing the properties and release effect of the fiber, while other negative ion release nano powder may have a weak reaction with hydroxyl polyethylene glycol carboxyl, resulting in a lower release effect of the fiber, therefore the application optimizes the combination effect of the two by adjusting the negative ion release nano powder to achieve the best improvement effect.

[0060] Example 2

[0061] This example is used to explore the effect of different negative ion release functional nano concentrated slurry compared to the addition amount of caprolactam on the negative ion performance of the prepared fiber and the spinning performance in the spinning process during the preparation of polyamide chip, specifically:

[0062] The negative ion release functional nano concentrated slurry in step 2) of Example 1 was adjusted to have a solid content of 0.05%, 0.2%, 1.5%, 2.0%, 2.5%, and 3.0% compared to caprolactam, and the remaining process steps were the same as Example 1, to prepare fibers with different contents of negative ion release functional nano concentrated slurry in this example, the negative ion release effect of the fibers was determined, and the spinning effect was recorded, and the results are shown in Table 2.

[0063] Table 2

[0064]

[0065] As can be seen from Table 2, the content of the nano-powder with negative ion release function in the chip has a significant effect on the fiber performance. Within a certain range, the powder content has a positive linear relationship with the negative ion release amount. When the content of the powder exceeds 2.5%, the spinnability of the fiber becomes poor, and the negative ion release amount also shows a downward trend. This is because too many nano functional powder particles may aggregate, causing the negative ion release channel to be blocked. This may limit the ability of the negative ions to be released into the fiber, resulting in a decrease in the amount of negative ion release.

[0066] Example 3

[0067] This example is used to explore the effect of different hydroxyl polyethylene glycol carboxyl concentrations of the prepared polyamide chip on the negative ion performance of the prepared fiber and the spinning performance in the spinning process compared with the addition amount of the lactam. Specifically,

[0068] In step 2) of Example 1, the content of the hydroxyl polyethylene glycol carboxyl monomer compared with the lactam is 1%, 2%, 3%, 4%, and 5%, respectively, and the remaining process steps are the same as those of Example 1. The fibers of different hydroxyl polyethylene glycol carboxyl monomers of this example are prepared, and the negative ion release effect of the fibers is determined. The results are shown in Table 3.

[0069] Table 3

[0070]

[0071] As can be seen from Table 3, the content of the hydroxyl polyethylene glycol carboxyl monomer in the chip has a significant effect on the fiber performance. Higher content of hydroxyl polyethylene glycol carboxyl may increase the interaction between the nano-powder and the fiber, causing the powder to adhere more tightly to the surface of the fiber, thereby releasing negative ions in a physical adsorption manner. Lower content of hydroxyl polyethylene glycol carboxyl may weaken the interaction between the nano-powder and the fiber, reducing the release effect and also being poor in durability. When the content of the hydroxyl polyethylene glycol carboxyl is too high, its dispersibility in the fiber may be reduced, reducing the openness of the negative ion release channel and thus reducing the release efficiency.

[0072] The present application has prepared a fiber with high-efficiency negative ion release function. By copolymerizing 4% hydroxyl polyethylene glycol carboxyl segments in the hexyl lactam chain segment to prepare polyester chip containing negative ion release function powder, the negative ion release efficiency of the fiber can be effectively improved. By adjusting the content and ratio of hydroxyl polyethylene glycol carboxyl and negative ion release function powder, a synergistic effect is achieved, which can endow the polyamide fiber with permanent negative ion release function.

[0073] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A method for producing a fiber having a high efficiency negative ion releasing function, characterized by: The application relates to a method for preparing a fiber with a high-efficiency negative ion release function. The negative oxygen ion powder comprises nanometer titanium dioxide, lanthanide and tourmaline superfine powder. The hydroxyl polyvinyl alcohol carboxyl monomer has a molecular weight of 600-2000 and an adding amount of 2-5% of the caprolactam. The negative oxygen ion powder is subjected to liquid-phase grinding, reaction in a hydration kettle and concentration to obtain the nanometer concentrated slurry with the negative ion release function. The grinding time of the liquid-phase grinding is 2-6h, the particle size of the ground powder is 80-150nm, the grinding medium is modified polyethylene glycol aqueous solution, and the powder concentration is 10-30%.

2. The method for preparing the fiber with high-efficiency negative ion release function as described in claim 1, characterized in that: The reaction temperature of the reaction in the hydration kettle is 60-150 DEG C, and the reaction time is 3-6h.

3. The method of claim 2, wherein the method is characterized by: The in-situ polymerization comprises ring-opening prepolymerization, post-polycondensation, water extraction purification and drying, wherein the ring-opening prepolymerization temperature is 140-180 DEG C, and the time is 40-80min; 4. The method of claim 2, wherein the method is characterized by: The post-polycondensation temperature is 230-270 DEG C, and the time is 3-6h; 5. The method for preparing the fiber with high-efficiency negative ion release function as described in claim 1, characterized in that: The boiling water extraction time is 20-28h, and the bath ratio is 1:1; The drying temperature is 80-120 DEG C, and the drying time is 4-8h. The ring-opening prepolymerization of the in-situ polymerization uses water as a ring-opening agent and caprolactam as a polymerization monomer, wherein the water adding amount is 1-3% of the caprolactam. Phosphoric acid is used as a catalytic efficiency regulator in the in-situ polymerization process.

6. The method of claim 1 or 5, wherein the method is characterized by: The spinning temperature of the melt spinning is 255-290 DEG C, the spinning speed is 600-3000m / min, and the initial pressure of the spinning assembly is 8-16MPa.

7. The method of claim 1 or 5, wherein the method is characterized by:

9. The fiber with the high-efficiency negative ion release function prepared by the method according to any one of claims 1-8.

8. The method for preparing the fiber with high-efficiency negative ion release function as described in claim 1, characterized in that: ​ ​

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