CN112812554B - UV-resistant and antibacterial extinction nylon slice and preparation method thereof - Google Patents
UV-resistant and antibacterial extinction nylon slice and preparation method thereof Download PDFInfo
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- D01F1/00—General methods for the manufacture of artificial filaments or the like
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Abstract
The invention discloses an anti-UV and anti-bacterial extinction nylon slice and a preparation method thereof, belonging to the technical field of textile, wherein the anti-UV and anti-bacterial extinction nylon slice comprises a titanium dioxide extinction agent, nano zinc oxide composite particles and caprolactam; the nanometer zinc oxide composite particles comprise nanometer zinc oxide particles, and the periphery of the nanometer zinc oxide particles is coated by organosilicon TEOS-28. The preparation method adopts titanium dioxide delustrant and nano zinc oxide composite particles to prepare a blending liquid, then the blending liquid is mixed with acid, amine and caprolactam, and the finished product is obtained after the steps of prepolymerization, final polymerization, filtration, granulation, extraction, drying and cooling. The preparation method has low cost investment, is easy to control, and the used raw materials are not easy to agglomerate and disperse, so that the effect of the preparation method can be fully exerted; the UV-resistant and antibacterial delustering nylon slices are used for preparing fibers or further used for weaving, and can endow fibers and fabrics with good UV-resistant, antibacterial and delustering properties.
Description
Technical Field
The invention belongs to the technical field of textile, and particularly relates to an anti-UV and antibacterial extinction nylon slice and a preparation method thereof.
Background
Along with the rapid development of global economy, the technology and the product quality of the nylon slice industry are continuously improved. Nylon chips have become an important branch of the synthetic chemical industry and have extremely wide application fields. With the urgent need for functionalized chemical fiber products, research and development of such products are increasingly active for large enterprises in this field. The conventional chemical fiber product prepared by extinction slicing cannot meet the daily demands of people, and a user not only needs the extinction function of low brightness of the product, but also has the ultraviolet resistance and antibacterial function, and is expected to have new products. In order to improve the extinction of the slice, titanium dioxide is added in the slice preparation process, the titanium dioxide has good scattering effect, visible light can be refracted and absorbed, so that good extinction effect is achieved, in order to improve the antibacterial and anti-UV effects of the slice, zinc oxide is added in the slice preparation process, the zinc oxide can automatically decompose free electrons under sunlight, especially under ultraviolet irradiation, positive holes are reserved, the holes can activate oxygen to become active oxygen, the active oxygen can perform oxidation reaction with various microorganisms, and therefore the sterilization effect is achieved, and the commonly used nano zinc oxide also has a very strong ultraviolet absorption function and scattering capability. However, titanium dioxide and zinc oxide have the problem of easy agglomeration in the use process, and the problem of easy fiber strength reduction, unsmooth fiber surface, easy filament generation and even fracture in the downstream spinning process is solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical problems to be solved by the invention are as follows: how to provide a nylon slice with UV resistance, antibacterial property and extinction property, and the surface of the fiber is not smooth, broken and broken easily caused in spinning.
In order to solve the technical problems, the invention adopts the following technical scheme: the UV-resistant and antibacterial extinction nylon slice comprises, by weight, 1.58-1.75% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.26-0.4% of acid, 0.1-0.22% of amine and the balance caprolactam;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 21.5-22.2% of titanium dioxide flatting agent and 0.08-0.15% of nano zinc oxide composite particles by weight percent;
the nano zinc oxide composite particles comprise nano zinc oxide particles and organosilicon TEOS-28 coated on the peripheries of the nano zinc oxide particles;
the titanium dioxide delustering agent comprises titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside.
The invention adopts another technical scheme that: the preparation method of the UV-resistant and antibacterial extinction nylon slice comprises the following steps:
and 3, adding the prepolymer obtained in the step 2 into a final polymerization tower for reaction, filtering the obtained melt, and then granulating to obtain nylon wet slices, and sequentially extracting, drying and cooling the obtained nylon wet slices to obtain the UV-resistant and antibacterial extinction nylon slices.
The invention has the beneficial effects that: according to the UV-resistant and antibacterial extinction nylon slice provided by the invention, the titanium dioxide extinction agent and the nano zinc oxide particles are matched for use, and the titanium dioxide and the nano zinc oxide particles are subjected to special coating treatment, so that the titanium dioxide extinction agent and the nano zinc oxide particles are not easy to agglomerate compared with the particles which are directly added, the effects of the titanium dioxide extinction agent and the nano zinc oxide particles can be fully exerted, and good light-shielding performance, antibacterial performance and ultraviolet resistance are provided for fibers and fabrics produced at the downstream; the preparation method of the UV-resistant and antibacterial extinction nylon slice is easy to operate and popularize, the conditions are easy to control, and compared with the traditional method for preparing master batches by melting auxiliary agents and partial nylon and then slicing, the preparation method of the UV-resistant and antibacterial extinction nylon slice is simpler in process, lower in equipment investment cost and suitable for industrial production.
Drawings
FIG. 1 is a schematic view of conventional zinc oxide particles and a nano zinc oxide composite particle submerging fiber polymer according to an embodiment of the present invention;
FIG. 2 is a photograph of a fabric obtained after an anti-UV and anti-bacterial delustering nylon sheet according to an embodiment of the present invention is used for spinning a fabric;
description of the reference numerals: 1. a fiber; 2. nano zinc oxide composite particles; 3. zinc oxide particles; 4. a void; 5. and (5) air bubbles.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The UV-resistant and antibacterial extinction nylon slice comprises, by weight, 1.58-1.75% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.26-0.4% of acid, 0.1-0.22% of amine and the balance caprolactam;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 21.5-22.2% of titanium dioxide flatting agent and 0.08-0.15% of nano zinc oxide composite particles by weight percent;
the nano zinc oxide composite particles comprise nano zinc oxide particles and organosilicon TEOS-28 coated on the peripheries of the nano zinc oxide particles;
the titanium dioxide delustering agent comprises titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside.
The titanium dioxide delustrant is disclosed in Chinese patent application number 202010036249.3 for relieving scaling of a prepolymerization tower.
From the above description, the beneficial effects of the invention are as follows: the UV-resistant and antibacterial extinction nylon slice provided by the invention is prepared by using the titanium dioxide extinction agent and the nano zinc oxide particles in a matched manner, and has good light-shielding property, antibacterial property and ultraviolet resistance by utilizing the titanium dioxide and the nano zinc oxide particles, and because the titanium dioxide and the nano zinc oxide particles are subjected to special coating treatment, compared with the particles which are directly added with the polyamide slice, the particles are not easy to agglomerate, and further compared with the common nylon slice, the L value and the B value are reduced, the extinction effect in the full extinction slice is more obvious, the sliced spun yarn is formed into cloth, and the special extinction and extinction effect is realized on the cloth surface, and meanwhile, the UV-resistant and antibacterial effects can be obviously exerted.
Further, the metal compound layer sequentially comprises a manganese ion layer and an aluminum oxide layer from inside to outside, wherein the manganese ion layer is a manganese sulfate layer, and manganese sulfate used for preparing the manganese sulfate layer is coated with organosiloxane (such as ethylene tris [ (1-methyl vinyl) oxy ] silane) before use.
From the above description, it is clear that the uncoated manganese sulfate is easily dissolved in water, and is washed out by the dissolved water during the addition process, and manganese ions in the manganese sulfate are attached to the titanium dioxide surface layer through the reaction, and are not easily dissolved by caprolactam, acid and amine by coating with organosiloxane.
Further, the preparation method of the nano zinc oxide composite particle comprises the following steps of;
and 2, adding the zinc acetylacetonate mixed solution into ethanol (100%), then adding the mesoporous silica obtained in the step 1, heating and stirring for 5-8 hours at 70 ℃, collecting residual white powder, then washing with ethanol, drying and calcining to obtain the nano zinc oxide composite particles.
From the above description, it is known that the ethyl orthosilicate performs electrophilic hydrolysis reaction and condensation reaction under the acid catalyst, the hydrolysis reaction rate is faster than the condensation reaction rate, a network structure with smaller particles and linearity is formed, finally, the particles are crosslinked with each other in a liquid medium to form gel, and mesoporous silica is obtained after calcination, when the mesoporous silica wraps the periphery of the zinc oxide particles, the zinc oxide particles can be embedded into the pore structure, and the mesoporous silica is used as a template, so that the growth of the nano zinc oxide particles is limited, and the occurrence of agglomeration phenomenon can be avoided. By adding the nano zinc oxide composite particles coated by TEOS, a peak-valley structure is formed on the surface of the fiber to reduce friction, and simultaneously reduce contact and cutting action with a fiber guide roller, so that the fiber can stably run, the problems of serious friction and uneven processing in production and strong cutting action of equipment caused by close contact with the guide roller are avoided, and the productivity is improved.
Further, the zinc acetylacetonate mixed solution is as follows: the volume ratio of the mixed solution of 0.01mol/L and 0.005mol/L of zinc acetylacetonate solution is 1:1, and the zinc acetylacetonate solution is obtained by dissolving zinc acetylacetonate in ethanol.
Further, the acid in the step 1 is hydrochloric acid.
Further, in the step 1, stirring is performed at 40-50 ℃ for 23-25 hours, and standing is performed for 23-25 hours.
Further, the calcination temperature in the step 1 is 520-580 ℃, and the calcination time is 6-8h; the calcination temperature in the step 2 is 520-580 ℃, and the calcination time is 5-7h.
From the above description, it is clear that the pH of hydrolysis significantly affects the structure of the finally formed coating, and that too high a pH produces particles that are easily formed into large-sized and granular particles, rather than small particles and having a linear network structure, and that control of temperature and time during the preparation can provide sufficient reaction conditions to ensure sufficient hydrolysis and condensation of ethyl orthosilicate, and control of calcination temperature can ensure uniform void distribution and small size differences in the resulting mesoporous silica.
The preparation method of the UV-resistant and antibacterial extinction nylon slice comprises the following steps:
and 3, adding the prepolymer obtained in the step 2 into a final polymerization tower for reaction, filtering the obtained melt, and then granulating to obtain nylon wet slices, and sequentially extracting, drying and cooling the obtained nylon wet slices to obtain the UV-resistant and antibacterial extinction nylon slices.
From the above description, the beneficial effects of the invention are as follows: according to the preparation method of the UV-resistant and antibacterial extinction nylon slice, the titanium dioxide and the nano zinc oxide which are subjected to special coating treatment are added into the prepared raw materials, so that the problems that the titanium dioxide and the nano zinc oxide are easy to agglomerate, the performance cannot be fully exerted, broken filaments and fibers in the spinning process are caused, and the like are solved, the spinnability of the obtained nylon slice is improved.
Further, the preparation of the titanium dioxide-nano zinc oxide composite particle blending liquid in the step 1 specifically comprises the following steps:
step a, adding nano zinc oxide composite particles into titanium dioxide, adding monomer water and a dispersing agent, uniformly stirring to obtain a first diluent, self-circulating the first diluent at 25-28 ℃, grinding the first diluent, sequentially stirring and centrifuging, removing large-particle titanium dioxide in the centrifuging process, and diluting the fine-particle titanium dioxide in the next step;
the addition amount of the dispersing agent is 0.18-0.22% of the total mass of the titanium dioxide;
and b, adding monomer water (adding the monomer water into the titanium dioxide of the fine particles collected after centrifugation), stirring, adjusting the mass concentration of the titanium dioxide to 21.5-22.2%, and the mass concentration of the nano zinc oxide composite particles to 0.08-0.15%, so as to obtain a second diluent, and filtering the second diluent by a filter screen twice in sequence to obtain the titanium dioxide-nano zinc oxide composite particle blending liquid.
From the above description, it is clear that both the titanium dioxide and the nano zinc oxide composite particles are solid substances, and must be dissolved and dispersed in use, and if the nano zinc oxide composite particles are separately configured, additional equipment is required, which undoubtedly increases the production cost in actual production.
Further, the monomer water comprises 38-43% by mass: 57-62% of Caprolactam (CPL) and desalted Water (WD), wherein the temperature of the monomer water is 12-15 ℃.
Further, the self-circulation time is 0.4-0.7h.
Further, the filtering of the filter screen in the step b is that the second diluent is filtered through a filter screen with the diameter of 1 μm and a filter screen with the diameter of 0.95 μm in sequence.
Further, the acid is terephthalic acid solution (PTA) with a mass concentration of 6.0-7.0%. The solute of the acid is terephthalic acid, and the solvent is caprolactam.
Further, the amine is a tetramethylpiperidine amine solution (TAD) with a mass concentration of 29.5-30.5%. The solute of the amine is tetramethyl piperidine amine, and the solvent is desalted water.
Further, the pressure in the prepolymerization column is 1480-1495mbar g and the temperature is 244-247 ℃.
Further, the pressure in the final polymerization tower is 1120-1142mbara, and the temperature is 245-248 ℃.
Furthermore, the mass ratio of the nylon wet slices to the extraction liquid used in the extraction is 1:1.2-1.3, and the extraction temperature is not more than 120 ℃.
Further, the drying is sectional drying, the temperature of the upper drying is 114-125 ℃, and the air quantity is 19000-21000m 3 And/h, the temperature of the lower drying stage is 124-128 ℃, and the air quantity is 8000-8300m 3 /h。
Further, the cooling temperature is 42-48 ℃.
Example 1:
the UV-resistant and antibacterial extinction nylon slice consists of 1.75% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.4% of acid, 0.22% of amine and the balance of caprolactam in percentage by weight;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 22.2% of titanium dioxide delustrant and 0.12% of nano zinc oxide composite particles by weight percent;
the nano zinc oxide composite particles consist of nano zinc oxide particles and organosilicon TEOS-28 coated on the peripheries of the nano zinc oxide particles;
the titanium dioxide delustering agent consists of titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside;
the titanium dioxide delustering agent is disclosed in Chinese patent application number 202010036249.3 for relieving scaling of a prepolymerization tower;
the preparation method of the nano zinc oxide composite particle comprises the following steps of;
and 2, adding the zinc acetylacetonate mixed solution into ethanol, then adding 3g of mesoporous silica obtained in the step 1, heating and stirring for 6 hours at 70 ℃, collecting residual white powder, then cleaning with ethanol, drying, and calcining for 5 hours at 550 ℃ to obtain the nano zinc oxide composite particles.
Example 2:
the UV-resistant and antibacterial extinction nylon slice consists of 1.58% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.26% of acid, 0.15% of amine and the balance of caprolactam in percentage by weight;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 21.5% of titanium dioxide delustrant and 0.08% of nano zinc oxide composite particles by weight percent;
the nano zinc oxide composite particles consist of nano zinc oxide particles and organosilicon TEOS-28 coated on the peripheries of the nano zinc oxide particles;
the titanium dioxide delustering agent consists of titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside;
the metal compound layer sequentially comprises a manganese ion layer and an aluminum oxide layer from inside to outside, wherein the manganese ion layer is a manganese sulfate layer, and manganese sulfate used for preparing the manganese sulfate layer is coated by ethylene tris [ (1-methyl vinyl) oxy ] silane before being used;
the preparation method of the nano zinc oxide composite particle comprises the following steps of;
and 2, adding the zinc acetylacetonate mixed solution into ethanol, then adding the mesoporous silica obtained in the step 1, heating and stirring for 5 hours at 70 ℃, collecting residual white powder, then cleaning with ethanol, drying, and calcining for 6 hours at 580 ℃ to obtain the nano zinc oxide composite particles.
Example 3:
the UV-resistant and antibacterial extinction nylon slice consists of 1.65% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.3% of acid, 0.1% of amine and the balance of caprolactam in percentage by weight;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 22% of titanium dioxide flatting agent and 0.15% of nano zinc oxide composite particles by weight percent;
the nano zinc oxide composite particles consist of nano zinc oxide particles and organosilicon TEOS-28 coated on the peripheries of the nano zinc oxide particles;
the titanium dioxide delustering agent consists of titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside;
the metal compound layer sequentially comprises a manganese ion layer and an aluminum oxide layer from inside to outside, wherein the manganese ion layer is a manganese sulfate layer, and manganese sulfate used for preparing the manganese sulfate layer is coated by ethylene tris [ (1-methyl vinyl) oxy ] silane before being used;
the preparation method of the nano zinc oxide composite particle comprises the following steps of;
and 2, adding the zinc acetylacetonate mixed solution into ethanol, then adding the mesoporous silica obtained in the step 1, heating and stirring for 8 hours at 70 ℃, collecting residual white powder, then cleaning with ethanol, drying, and calcining for 7 hours at 520 ℃ to obtain the nano zinc oxide composite particles.
Example 4:
the preparation method of the UV-resistant and antibacterial extinction nylon slice comprises the following steps:
step a, sucking 1kg of titanium dioxide into a diluting tank through a powder suction machine, adding nano zinc oxide composite particles, then adding monomer water and 2g of dispersing agent (sodium hexametaphosphate), and uniformly stirring to obtain a first diluent; the first diluent is self-circulated in the diluting tank for 0.4-0.7h, and the temperature in the diluting tank is 25-28 ℃; grinding the first diluent by using a grinder, and stirring and centrifuging sequentially after grinding;
the monomer water comprises the following components in percentage by mass: 62% of CPL and WD, wherein the temperature of the monomer water is 14 ℃;
and b, adding monomer water, stirring, adjusting the mass concentration of titanium dioxide to 22% and the mass concentration of nano zinc oxide composite particles to 0.12% to obtain a second diluent, and filtering the second diluent through a filter screen with the thickness of 1 μm and a filter screen with the thickness of 0.95 μm in sequence to obtain the titanium dioxide-nano zinc oxide composite particle blending liquid.
the drying is sectional drying, the temperature of the upper drying is 114 ℃, and the air quantity is 19000m 3 And/h, the temperature of the lower drying stage is 124 ℃, and the air quantity is 8000m 3 /h; the temperature of the cooling was 42 ℃.
Example 5:
the preparation method of the UV-resistant and antibacterial extinction nylon slice comprises the following steps:
step a, sucking 1kg of titanium dioxide into a diluting tank through a powder sucking machine, adding nano zinc oxide composite particles, then adding monomer water and 2.2g of dispersing agent (sodium hexametaphosphate), and uniformly stirring to obtain a first diluent; the first diluent is self-circulated in the diluting tank for 0.7h, and the temperature in the diluting tank is 25-28 ℃; grinding the first diluent by using a grinder, and stirring and centrifuging sequentially after grinding;
the monomer water comprises the following components in percentage by mass: 57% of CPL and WD, wherein the temperature of the monomer water is 15 ℃;
and b, adding monomer water, stirring, adjusting the mass concentration of titanium dioxide to 22.2% and the mass concentration of nano zinc oxide composite particles to 0.15% to obtain a second diluent, and filtering the second diluent through a filter screen with the thickness of 1 μm and a filter screen with the thickness of 0.95 μm in sequence to obtain the titanium dioxide-nano zinc oxide composite particle blending liquid.
the drying is sectional drying, the upper drying temperature is 125 ℃, and the air quantity is 20000m 3 And/h, the temperature of the lower drying stage is 125 ℃, and the air quantity is 8200m 3 /h; the temperature of the cooling was 45 ℃.
Example 6:
the preparation method of the UV-resistant and antibacterial extinction nylon slice comprises the following steps:
step a, sucking 1kg of titanium dioxide into a diluting tank through a powder suction machine, adding nano zinc oxide composite particles, then adding monomer water and 1.8g of dispersing agent (sodium hexametaphosphate), and uniformly stirring to obtain a first diluent; the first diluent is self-circulated in the diluting tank for 0.4h, and the temperature in the diluting tank is 25-28 ℃; grinding the first diluent by using a grinder, and stirring and centrifuging sequentially after grinding;
the monomer water comprises the following components in percentage by mass: 60% of CPL and WD, wherein the temperature of the monomer water is 12 ℃;
and b, adding monomer water, stirring, adjusting the mass concentration of titanium dioxide to 21.5%, and the mass concentration of nano zinc oxide composite particles to 0.08%, so as to obtain a second diluent, and filtering the second diluent through a filter screen with the diameters of 1 μm and 0.95 μm in sequence, so as to obtain the titanium dioxide-nano zinc oxide composite particle blending liquid.
the drying is sectional drying, the temperature of the upper drying is 120 ℃, and the air quantity is 21000m 3 And/h, the temperature of the lower drying stage is 128 ℃, and the air quantity is 8300m 3 /h; the temperature of the cooling was 48 ℃.
Comparative example 1:
comparative example 1 differs from example 4 only in that the nano zinc oxide composite particles were replaced with nano zinc oxide having a particle size of 50 to 300nm, and nylon chips were prepared.
Comparative example 2:
comparative example 2 differs from example 4 only in that no nano zinc oxide composite particles were added to prepare nylon chips.
The nylon chips of comparative examples 1-2 and examples 4-6 were spun (20D/24F) using the same equipment under the same conditions, respectively, and the performance test of the resulting nylon fibers was as shown in Table 1.
Nylon yarn was prepared by using the nylon chips of examples 4 to 6, and then woven using the nylon yarn, respectively, to obtain woven fabrics, each group was used for measurement of ultraviolet resistance before and after washing and antibacterial property before and after washing, respectively, 1.5×4m was used, and the results are shown in table 2, and the test standards were referred to GB/T18830-2009 and GB/T20944.3-2008.
The nylon chips of example 4 were used to weave corresponding fibers as shown in fig. 2.
The mechanical properties of the fibers obtained after spinning were tested and the results are shown in table 1.
TABLE 1
TABLE 2
From comparative example 2 (conventional spinning) in table 1, it can be seen that the addition of nano zinc oxide significantly affects the spinnability and product properties of the fibers. However, compared with the comparative example 1 group added with the common nano zinc oxide, the strength of the obtained fiber can be obviously improved and the evenness and the hairiness can be reduced after the nano zinc oxide composite particles are added in the example group.
In table 2, since the nano zinc oxide composite particles were not added in comparative example 2, which is a conventional product, they were not antibacterial, and thus were not examined. As can be seen from Table 2, the antibacterial effect of comparative example 1 and 3 examples before washing was similar, but after washing, the comparative example 1 used the samples without the ordinary nano zinc oxide coating, the antibacterial performance was significantly reduced, and the antibacterial performance surface of the samples of group 3 examples was more stable.
As can be seen from fig. 2, the cloth prepared from the UV-resistant and antibacterial extinction nylon slices provided by the invention has obvious matte effect and excellent extinction.
In summary, the anti-UV and anti-bacterial extinction nylon slice provided by the invention is prepared by adding the titanium dioxide extinction agent and the nano zinc oxide composite particles into raw materials, wherein the common zinc oxide is coarse in particle size and unsmooth in surface, when the fiber is embedded, gaps and bubbles are formed between the common zinc oxide and the fiber, the strength of the fiber is reduced due to the existence of the gaps and the bubbles, and the fiber is easy to generate broken filaments and even generate fracture in the processing process, and the nano zinc oxide composite particles provided by the invention are different from the common zinc oxide, are coated by TEOS-28, can be tightly combined with the fiber without the generation of gaps when the nano zinc oxide composite particles are embedded into the fiber, are compatible with the surface of the polymer, so that the strength of the fiber is enhanced, and the problem of broken ends is reduced; the nylon chips prepared by the preparation method of the antibacterial extinction nylon chips provided by the invention are more uniform in stretching and yarn bundle evenness in the downstream spinning process, can be better operated in the texturing process, and the woven cloth covers show extinction and fog effects, have good antibacterial and UV resistance, have stronger competitiveness than other products of the same type, and have very high advantages in meeting the requirements of customers.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (9)
1. The UV-resistant and antibacterial extinction nylon slice is characterized by comprising, by weight, 1.58-1.75% of titanium dioxide-nano zinc oxide composite particle blending liquid, 0.26-0.4% of acid, 0.1-0.22% of amine and the balance of caprolactam;
the titanium dioxide-nano zinc oxide composite particle blending liquid comprises 21.5-22.2% of titanium dioxide flatting agent and 0.08-0.15% of nano zinc oxide composite particles by weight percent;
the titanium dioxide delustering agent comprises titanium dioxide particles and a composite layer coated outside the titanium dioxide particles, wherein the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside;
the preparation method of the nano zinc oxide composite particle comprises the following steps of;
step 1, adding n-butanol into desalted water, dissolving, adding polyether polyol, adding acid to adjust the pH value to 1.8-2.5, then dripping ethyl orthosilicate, heating to 40-50 ℃ after dripping, keeping the temperature while stirring, heating to 100-110 ℃, standing to obtain white precipitate, filtering with a filter membrane with the thickness of 0.22 mu m, cleaning and drying the retentate on the filter membrane, and calcining to obtain mesoporous silica;
and 2, adding the zinc acetylacetonate mixed solution into ethanol, then adding the mesoporous silica obtained in the step 1, heating and stirring for 5-8 hours at 70 ℃, collecting residual white powder, then washing with ethanol, drying and calcining to obtain the nano zinc oxide composite particles.
2. The UV resistant, antimicrobial matt polyamide chips according to claim 1, wherein the acid in step 1 is hydrochloric acid.
3. The UV-resistant, antimicrobial matt polyamide chips according to claim 1, characterized in that the stirring time in step 1 at 40-50 ℃ is 23-25 hours and the standing time is 23-25 hours.
4. The UV-resistant, antimicrobial matt polyamide chips according to claim 1, characterized in that the calcination temperature in step 1 is 520-580 ℃, the calcination time is 6-8h, the calcination temperature in step 2 is 520-580 ℃, and the calcination time is 5-7h.
5. A method for preparing the anti-UV and anti-bacterial extinction nylon slice as claimed in claim 1, which is characterized by comprising the following steps:
step 1, preparing a titanium dioxide-nano zinc oxide composite particle blending solution;
step 2, mixing the titanium dioxide-nano zinc oxide composite particle blending liquid, acid, amine and caprolactam, and then, uniformly mixing, and then, entering a prepolymerization tower for reaction to obtain a prepolymer;
and 3, adding the prepolymer obtained in the step 2 into a final polymerization tower for reaction, filtering the obtained melt, and then granulating to obtain nylon wet slices, and sequentially extracting, drying and cooling the obtained nylon wet slices to obtain the UV-resistant and antibacterial extinction nylon slices.
6. The process for preparing UV-resistant, antimicrobial matt polyamide chips as defined in claim 5, wherein the pressure in the prepolymerization tower is 1480-1495mbar and the temperature is 244-247 ℃.
7. The process for preparing UV-resistant, antimicrobial matt polyamide chips according to claim 5, characterized in that the pressure in the final polymerization tower is 1120-1142mbar and the temperature is 245-248 ℃.
8. The method for preparing the UV-resistant and antibacterial extinction nylon slices according to claim 5, wherein the mass ratio of the nylon wet slices to the extract is 1:1.2-1.3, and the extraction temperature is not more than 120 ℃.
9. The method for preparing the UV-resistant and antibacterial extinction chinlon slices according to claim 5, wherein the drying is sectional drying, the temperature of the upper drying is 114-125 ℃, and the air quantity is 19000-21000m 3 And/h, the temperature of the lower drying stage is 124-128 ℃, and the air quantity is 8000-8300m 3 /h。
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| CN113249959A (en) * | 2021-06-18 | 2021-08-13 | 上海贝域实业有限公司 | Nano black silk physical shading curtain and preparation method thereof |
| CN117656619B (en) * | 2024-01-31 | 2024-04-05 | 安徽朗读者智尚科技有限公司 | Antibacterial moisture-permeable multilayer composite fabric and preparation method thereof |
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