CN106637959A - Ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of cotton fabric - Google Patents

Ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of cotton fabric Download PDF

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CN106637959A
CN106637959A CN201611166801.0A CN201611166801A CN106637959A CN 106637959 A CN106637959 A CN 106637959A CN 201611166801 A CN201611166801 A CN 201611166801A CN 106637959 A CN106637959 A CN 106637959A
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water
bafta
free
ultraviolet light
cotton fabric
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俞丹
王炜
孙第
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Donghua University
National Dong Hwa University
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Donghua University
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/50Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
    • D06M13/51Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
    • D06M13/513Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/04Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/08Organic compounds
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/04Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/08Organic compounds
    • D06M10/10Macromolecular compounds
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02Natural fibres, other than mineral fibres
    • D06M2101/04Vegetal fibres
    • D06M2101/06Vegetal fibres cellulosic
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/10Repellency against liquids
    • D06M2200/12Hydrophobic properties

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses an ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of cotton fabric. The method comprises the steps of putting the cotton fabric into 3-mercaptopropyl triethoxysilane ethyl acetate solution and carrying out mercapto modification to obtain pretreated cotton fabric; dipping the cotton fabric subjected to mercapto modification into vinyl polyhedral oligomeric silsesquioxane solution, and obtaining the fluoride-free and water-repellent cotton fabric, which has a surface with an approximate super-hydrophobic effect, under the ultraviolet curing condition. The reaction is based on the principle of click chemistry, so that a static contact angle is basically remained unchanged after soaping treatment is carried out. Furthermore, according to a test method of AATCC 22-2005 waterproof spray test, the waterproof spray test score of the cotton fabric subjected to water-repellent finishing reaches 95. The ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of the cotton fabric is simple in operation and high in efficiency, obvious in water-repellent effect under the condition that a finishing agent is fluoride-free, and high in finishing washing fastness.

Description

A kind of bafta free-floride water-repellent finishing method reacted based on ultraviolet light polymerization
Technical field
The invention belongs to functional finish of cotton fabric field, more particularly to a kind of bafta reacted based on ultraviolet light polymerization without Fluorine water-repellent finishing method.
Background technology
The purpose of water repellent finish is the wetting for preventing water to fabric, using the additonal pressure of fabric capillary, prevents liquid The transmission of water, but still maintain the breathable moisture permeability of fabric.WATER REPELLENT FANISH FABRIC is initially used for producing military uniform, protective garment, It is now widely used for making gym suit, safari suit, traveling bag, tent etc..Perfluor finishing agent is because of its excellent heat endurance, change Stability, high surface and hydrophobic oleophobic performance are learned, and is widely used in industrial production and personal consumption field.It is conventional at present Fluorine surfactant be mainly based on perfluoro octyl sulfonic acid (PFOS) or perfluoro caprylic acid (PFOA) raw material.In recent years, Increasingly deep with correlative study, people gradually recognize refractory organicses, environmental persistence and the biological accumulation of PFOA/PFOS Property, therefore, its substitute is found, substitute technology becomes the study hotspot of relevant industries.
At present long chain fluorine-containing water and oil repellent finish alternative orientation substantially it is following some:
One is exploitation short-chain perfluoroaldyl fluorocarbons, and such finishing agent is in contrast without obvious persistence biological accumulation Property, the short time excludes in vitro with human metabolism, and its degradation product is nontoxic.But shortcoming is such product with waterproof and goes Based on greasy dirt function, PFOS oil-repellent finiss levels are not reached.
Two is fluorine-containing and other surfactants compound synergics.There are some researches show, as long as in hc-surfactant Minimal amount of fluorine-containing surfactant is added, its ability for reducing water surface tension is just greatly improved, and can be substantially reduced Oil/water circle and tension force.The special performance of fluorine-containing surfactant can be played, by fluorine-containing surfactant and hydrocarbon surface-active Agent is compounded, it is possible to greatly reduce the consumption of fluorine-containing surfactant, reduces into wood, most importantly reduces the pollution of PFOS.
Three is exploitation oil-refusing finishing agent containing silicofluoride.There are some researches show, methyl silicone and perfluorinated octyl sulfuryl amine propylene Critical surface tension of the acid esters on film is respectively 27mN/m and 5mN/m;On cotton be respectively 38~45mN/m and 24~ 25mN/m.Proper alignment as water-refusing oil-refusing finishing agent on fiber is methyl hydrogen silicone or dimethyl silscone-CH3, fluorine For-the CF of acrylate3With-CF2All in fiber surface outer layer, it is better that waterproof refuses oily effect.Fluorine silicon finishing agent is provided simultaneously with The advantage of fluorine-containing and siliceous finishing agent, but have the disadvantage that building-up process is relative complex, it is relatively costly.
Four is that nanometer technology is applied into water and oil repellent finish.After nano material is arranged, fabric face forms such as lotus The rough surface of leaf, reaches the effect that waterproof refuses oil.Although the miniaturization of nanometer finishing agent particle size makes fabric have surface Effect, small-size effect and macro quanta tunnel effect, will be a kind of preferable fabric finishing agents, but in application process, Nano material finishing agent is susceptible to reunite, and so as to lose nano-meter characteristic, and there is a problem of arranging poor durability.
Compared to fluorine-containing water repellent, silicone fabric waterproofing agent, relative low price, the fabric of arrangement has durability Waterproof effect, is particularly well-suited to synthetic fibers and its blend fabric, anti-particularly on filament yarn fabric in synthetic fabrics Water effect, resistance to water and dry-cleaning property are very good, but on cotton fiber and viscose fiber fabric, washability is just more slightly worse, and this may It is that cellulose fibre is swelling in water, caused by rupturing the organosilicon membrane of imparting fabric waterproof.Waterproofing agent of organosilicon is general It is made up of two kinds of components, i.e., hydrogen-containing siloxane polymer (being commonly called as containing hydrogen silicone oil), dimethyl silicone polymer (are commonly called as dimethyl-silicon Oil) or polydimethylhydroxysiloxane (being commonly called as dihydroxy silicone oil).Individually make waterproofing agent with dimethyl silicone polymer, it is necessary to First being heated a few hours can just align into waterproofing membrane.But, the chemism of containing hydrogen silicone oil is higher, must be at 150 DEG C Under conditions of, could process and aggregate into waterproofing membrane, and the fabric feeling after processing is not good enough.
Composite organic-inorganic material combines organic material and the respective advantage of inorganic material, with significant superiority Can, become the focus of research.In recent years, caged silsesquioxane (POSS) is this has regular stereochemical structure to have simultaneously singly to receive The organic-inorganic hybrid molecule of metrical scale makes it have good Research Significance.The chemical structural formula of POSS is (RSiO3/2) n, n =6~12, R are organic group, and wherein one or more are reactive functional groups.What is carried after POSS functionalization is different organic Group determines POSS hybrid forms different in the polymer.For example, the POSS of single reaction functional group by copolymerization or Reactively blending is grafted on main polymer chain, and the POSS of two functional groups can be embedded into high polymer main chain, with three The POSS of above reactive functional groups can serve as the polymer that crosslinking agent introduces build.The introducing of POSS often makes polymer One or more performance is improved, such as thermodynamic property, crystal property, and the improvement in this performance depends on POSS poly- Accumulation shape in compound matrix.Additionally, there are some researches show, when POSS is chemically bonded on polymer, POSS-POSS, Interaction between POSS- polymer except producing heat endurance and the enhanced POSS modified polies beyond the region of objective existence of molecular level, most Prominent is that POSS based polyalcohols can form the nanoscale features being made up of Major particle, the micron order being made up of aggregation spy The level form levied, and the multiple dimensioned roughness in surface and produce super hydrophobic surface.
Therefore, as attempted by water repellent finishing agent in combination with POSS, to prepare the finishing agent of more premium properties, at present, this The research of aspect has been reported.For example, there are some researches show, ultraviolet hardening POSS fluorinated block copolymers have relatively low Surface energy and limited surface mobility, can occur Partial Reconstruction on surface, coating present higher water contact angle (113~ 116.5 °), higher receding contact angle (100~113 °), the low angle of lag (8~11 °) of contact and relatively low surface energy (11.1 ~11.6 millijoules/square metre).Additionally, in coating scratch resistance and water repellent research, by 8F-POSS (octafluoro alkyl POSS) and 8M-POSS (prestox acryloxy POSS) mixes under the conditions of ultraviolet light polymerization and arranges in coating surface, increased its table While surface roughness, compare 8M-POSS and individually apply, both act synergistically and cause water repellent effect raising 60%, mar-proof hard Degree increases by 400%.
Studies have found that, 80 DEG C of heating stirrings 2 under AIBN catalyst actions by vinyl POSS and 17 fluorine decyl mercaptans My god, generate fluoroPOSS-PMMA (fluorination POSS- polymethyl methacrylates) the surface static contact angle that product process is formed Lifted to 114 ° to 124 ° from original 71 °.But the method reaction time is long, and effect is general.
Disclose UV curing method additionally, having been reported that, will vinyl POSS and perfluoro decyl mercaptan in dichloromethane Irradiation generates F-POSS under uviol lamp in alkane solvents, and bafta is sufficiently impregnated with the F-POSS ethanol solutions of synthesis.Arrange To cotton fabric waterproofing effect static contact angle and roll angle it is reachable~153 ° and~6 °.But the method has the disadvantage finishing agent fastness Difference, it is not water-fastness, and fluorine-containing mercaptan is expensive.
The content of the invention
The technical problem to be solved is to provide a kind of bafta free-floride water repellent reacted based on ultraviolet light polymerization Method for sorting, by POSS in combination with floride-free water repellent finish is by click chemistry, both fusions excellent specific properties, so as to refuse in enhancing Water effect, reduces finishing time, while raising efficiency, improves washing fastness, improves cotton fabric waterproofing performance durability degree.
In order to solve the above problems, the invention provides a kind of bafta free-floride water repellent based on ultraviolet light polymerization reaction is whole Reason method, comprises the following steps:
Step 1):Bafta is roughened first, is subsequently placed in the 3- mercaptopropyltriethoxysilanes of 1~5wt% (KH-580) sulfhydryl modified, concussion, fully cleaning are carried out in ethyl acetate solution, vacuum drying obtains pre-treatment bafta;
Step 2):Prepare containing ethenyl cage model sesquialter siloxane (vinyl-POSS), hydrosulphonyl silane or alkyl hydrosulfide Organic solvent solution, sulfhydryl modified bafta is impregnated wherein, is processed based on click chemistry principle under the conditions of ultraviolet light polymerization There is the floride-free water repellent bafta Jie Jin super-hydrophobic effect to surface.
Preferably, the bafta is pure continuous yarn fabric or cotton fiber blended fabric.
Preferably, the step 1) described in roughening be specially:With the NaOH of 10~20g/L and putting down for 5~10g/L Flat plus O, is roughened at a temperature of 60~80 DEG C.
Preferably, the step 1) in sulfhydryl modified temperature be 15~35 DEG C, the time is 2~3h.
Preferably, the step 1) in 3- mercaptopropyltriethoxysilanes ethyl acetate solution in also have including other The silane coupler of one or more mercapto groups.
Preferably, the step 2) in organic solvent be dichloromethane and ethyl acetate at least one.
Preferably, the step 2) in hydrosulphonyl silane be the silane structure compound with one or more mercapto groups Or mixture;Alkyl hydrosulfide is long-chain fat race alkane compound or mixture with one or more mercapto groups.
Preferably, ultraviolet light polymerization condition is specially in the step 2:Using light trigger, the light trigger includes At least one in 2,2- dimethoxy -2- phenyl acetophenones and 2,2- dihydromethyl propionic acid.Ultraviolet light polymerization reaction principle base In sulfydryl-ethylenic click chemistry principle, ethenyl cage model sesquialter siloxane, the step single bath process of hydrosulphonyl silane (or alkyl hydrosulfide) It is bonded directly to sulfhydryl modified cotton-textile fibres.
Bafta and 3- mercaptopropyltriethoxysilanes are carried out condensation reaction by the present invention first, obtain Modification of Cotton Fabric Sulfydryl (- SH).3- mercaptopropyltriethoxysilanes belong to silane coupler, are by silicochloroform (HSiCl3) and with reactive base Group unsaturated olefin platinum propylhomoserin catalysis under addition, then Jing alcoholysis and obtain.Silane coupler be substantially a class have it is organic The silane of functional group, having simultaneously in the molecule thereof can be with inorganic material (such as glass, silica sand, metal) chemically combined reaction Group and with organic material (synthetic resin etc.) chemically combined reactive group.The ethyoxyl of its one end can be utilized by condensation The hydroxyl reaction of reaction and fiber surface makes fiber be modified so as to form grafting, becomes the fiber with sulfydryl.Secondly, Cotton fiber containing sulfhydryl reactive group and the same silane with sulfydryl or alkyl hydrosulfide under the conditions of ultraviolet light polymerization with second Thiazolinyl POSS carries out click chemistry reaction, so as to form firm chemical bond.Methyl on silicon oxygen bond (or the length of alkyl hydrosulfide Alkyl group) itself rotate counterclockwise, the outside sweep of the hydrogen atom in alkyl is made, it is as umbrella that silica chain is completely obscured In the surfaces of revolution of alkyl, and POSS based polyalcohols can be formed be made up of Major particle nanoscale features, by aggregation The level form of the micrometer-class of composition, and the multiple dimensioned roughness in surface and produce hydrophobic surface, both make synergy Obtain bafta and possess significant water repellency.Furthermore because defining stable chemical bond with fiber, water repellency is persistently, water-fast Wash excellent performance.
The present invention is first modified process to bafta using 3- mercaptopropyltriethoxysilanes, is had cotton fiber The sulfydryl of greater activity;Then reacted by click chemistry, make hydrosulphonyl silane (or alkyl hydrosulfide) and the second with ethylene linkage structure Thiazolinyl POSS, with the bafta through modification ultraviolet light polymerization reaction is carried out, and is attached to both by chemical bonding On cotton fiber molecule, product after treatment has waterproofing function.Simple to operate, efficiency high of the invention, it is floride-free in finishing agent Under the conditions of, substantially, washing fastness is high, improves cotton fabric waterproofing performance durability degree for water repellent effect.
Description of the drawings
Fig. 1 is the modified cotton fiber reaction mechanism schematic diagram of 3- mercaptopropyltriethoxysilanes;
Fig. 2 is sulfhydryl modified cotton fiber, hydrosulphonyl silane (or alkyl hydrosulfide) and vinyl POSS ultraviolet light polymerization clickizations Reaction schematic diagram is learned, wherein R-SH is hydrosulphonyl silane or alkyl hydrosulfide;
Fig. 3 is embodiment 1-3 water repellent bafta static contact angle side view, and a is the static contact angle of embodiment 1 (149.2 °), b is the static contact angle of embodiment 2 (146.3 °), and c is the static contact angle of embodiment 3 (132.8 °), and d is embodiment 1 Soap process after static contact angle (147.3 °);
Fig. 4 is standard water drenching experiment effect figure;
Fig. 5 a are the ESEM side view on raw cotton fiber surface;
Fig. 5 b are the ESEM side view on cotton fiber surface after the arrangement of embodiment 1;
Fig. 5 c are the ESEM side view on cotton fiber surface after the arrangement of embodiment 2.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
The use of grammes per square metre is 90g/m in embodiment 1-32Plain weave bafta, polyester cotton grammes per square metre be 130g/m2, mix Spin than being 35/65 for T/C.Vinyl POSS is purchased from MACKLIN companies, and lauryl mercaptan is purchased from Sigma-Aldrich companies, 3- mercaptos Propyl-triethoxysilicane, 2,2- dimethoxy -2- phenyl acetophenones are purchased from Adamas companies, and other reagents are analyses It is pure, in use without the need for further purifying.
Embodiment 1
Process is modified to bafta using 3- mercaptopropyltriethoxysilanes, and with vinyl POSS, hydrosulphonyl silane Reaction, makes cotton have good water repellency, and it is concretely comprised the following steps:
(1) pretreatment stage:
1. 15g/L NaOH and 7g/L paregal O solution are prepared, 70 DEG C of temperature carry out roughening 20min to bafta;
2. 5wt%3- mercaptopropyltriethoxysilane ethyl acetate solutions are prepared, by the bafta input solution after roughening In, beaker mouth diaphragm seal, in being placed in temperature constant magnetic stirring water-bath, 25 DEG C of concussions are processed 2 hours;
3. bafta is taken out, is fully cleaned in distilled water, 60 DEG C of vacuum dryings;
(2) the Final finishing stage:
1. the vinyl POSS and 3- mercaptopropyltriethoxysilane dichloromethane solution for preparing mass concentration respectively for 1%, Fully ultrasonic vibration, is subsequently added 2,2- dimethoxy -2- phenyl acetophenone light triggers, ultrasonic vibration;
2. it is laid on bafta is smooth in culture dish, topples over the above-mentioned dressing liquid of certain volume, bafta is crossed in slightly submergence Surface, covers one layer of quartz plate at culture dish mouth;
3. bafta is placed in into power under 500W ultraviolet light cold light sources, lamp away from 13cm, illumination 30min, turn-over, light again According to 30min;n;
4. bafta is taken out, deionized water is fully washed, 60 DEG C of drying.
Embodiment 2
Process is modified to bafta using 3- mercaptopropyltriethoxysilanes, and with vinyl POSS, alkyl hydrosulfide Reaction, makes cotton have good water repellency, and it is concretely comprised the following steps:
(1) pretreatment stage:
1. 15g/L NaOH and 7g/L paregal O solution are prepared, 70 DEG C of temperature carry out roughening 20min to bafta;
2. 5wt%3- mercaptopropyltriethoxysilane ethyl acetate solutions are prepared, by the bafta input solution after roughening In, beaker mouth diaphragm seal, in being placed in temperature constant magnetic stirring water-bath, 25 DEG C of concussions are processed 2 hours;
3. bafta is taken out, is fully cleaned in distilled water, 60 DEG C of vacuum dryings;
(2) the Final finishing stage:
1. it is respectively 1% vinyl POSS and the dichloromethane solution of lauryl mercaptan to prepare mass concentration, and fully ultrasound is shaken Swing, be subsequently added 2,2- dimethoxy -2- phenyl acetophenone light triggers, ultrasonic vibration;
2. it is laid on bafta is smooth in culture dish, topples over the above-mentioned dressing liquid of certain volume, bafta is crossed in slightly submergence Surface, covers one layer of quartz plate at culture dish mouth;
3. bafta is placed in into power under 500W ultraviolet light cold light sources, lamp away from 13cm, illumination 30min, turn-over, light again According to 30min;
4. bafta is taken out, deionized water is fully washed, 60 DEG C of drying.
Embodiment 3
Process is modified to polyester-cotton fabric (65/35) using 3- mercaptopropyltriethoxysilanes, and with vinyl POSS, Alkyl hydrosulfide reacts, and makes polyester-cotton blend have good water repellency, and it is concretely comprised the following steps:
(1) pretreatment stage:
1. 15g/L NaOH and 7g/L paregal O solution are prepared, 70 DEG C of temperature carry out roughening 20min to polyester-cotton fabric;
2. 5wt%3- mercaptopropyltriethoxysilane ethyl acetate solutions are prepared, the polyester-cotton fabric input after roughening is molten In liquid, beaker mouth diaphragm seal, in being placed in temperature constant magnetic stirring water-bath, 25 DEG C of concussions are processed 2 hours;
3. polyester-cotton fabric is taken out, is fully cleaned in distilled water, 60 DEG C of vacuum dryings;
(2) the Final finishing stage:
1. it is respectively 1% vinyl POSS and the dichloromethane solution of lauryl mercaptan to prepare mass concentration, and fully ultrasound is shaken Swing, be subsequently added 2,2- dimethoxy -2- phenyl acetophenone light triggers, ultrasonic vibration;
2. it is laid on polyester-cotton fabric is smooth in culture dish, topples over the above-mentioned dressing liquid of certain volume, polyester-cotton blend is crossed in slightly submergence Fabric face, covers one layer of quartz plate at culture dish mouth;
3. polyester-cotton fabric is placed in into power under 500W ultraviolet light cold light sources, lamp away from 13cm, illumination 30min, turn-over, again Illumination 30min;
4. polyester-cotton fabric is taken out, deionized water is fully washed, 60 DEG C of drying.
Bafta and 3- mercaptopropyltriethoxysilanes are carried out condensation reaction by the present invention first, obtain Modification of Cotton Fabric Sulfydryl (- SH).3- mercaptopropyltriethoxysilanes belong to silane coupler, are by silicochloroform (HSiCl3) and with reactive base Group unsaturated olefin platinum propylhomoserin catalysis under addition, then Jing alcoholysis and obtain.Silane coupler be substantially a class have it is organic The silane of functional group, having simultaneously in the molecule thereof can be with inorganic material (such as glass, silica sand, metal) chemically combined reaction Group and with organic material (synthetic resin etc.) chemically combined reactive group.The ethyoxyl of its one end can be utilized by condensation The hydroxyl reaction of reaction and fiber surface makes fiber be modified so as to form grafting, becomes fiber (the reaction machine with sulfydryl Reason is as shown in Figure 1).Secondly, the cotton fiber containing sulfhydryl reactive group and the same silane with sulfydryl or alkyl hydrosulfide are in purple Click chemistry reaction is carried out with vinyl POSS under outer photo curing condition, so as to form firm chemical bond (reaction mechanism such as Fig. 2 It is shown).
Bafta is carried out after water repellent finish, by showing to its static contact angle test result such as Fig. 3:Fiber surface Through being grafted the contact angle of embodiment 1 of hydrosulphonyl silane up to 149.2 °, the contact angle of grafting alkyl hydrosulfide embodiment 2 is 146.3 °, Contact angle compares pure cotton fabric after the process of polyester-cotton fabric alkyl hydrosulfide slightly reduces, and is 132.84 °.Knowable to analysis result, for The method for sorting of the present invention, silane structure compares Long carbon chain alkane structure, and contact angle slightly increases, and water repellent effect more preferably, connects Nearly super-hydrophobic effect.Polyester cotton compares pure cotton fabric, and water repellent effect has weakened, and reason may be compared for polyester fiber In pure cotton fabric and follow-up ultraviolet light polymerization stage can reactive group quantity it is relatively fewer, it is total and cause finishing agent treatment effect to become It is weak.
After through 3 times at 70 DEG C, fully circulation is soaped, the water repellent fabric static contact angle of embodiment 1 remains 147.3 °.Knot Fruit shows that the water repellent bafta that method for sorting of the present invention is obtained has excellent washing fastness.It is hereby understood that finishing agent and cotton Fiber is compared common method for sorting durability and is greatly increased by firm chemical bonds.
According to《AATCC 22--2005 waterproof spray tests》Method of testing bafta after the water repellent finish of embodiment 2 is entered Row test, as shown in figure 4, reference standard figure, with reference to standards of grading, because the fabric face after spray speckles with the globule, but without profit Wet situation, evaluation fraction should be 95 points.
By bafta as former state, embodiment 1, the bafta after arranging in embodiment 2 is scanned electron microscopic observation, Fig. 5 a Central Plains Cotton fiber surface is in natural distorted shape, and the surface of cotton fabric (such as Fig. 5 b, Fig. 5 c) after processing covers one layer of hackly thing Matter, the groove of natural distortion is covered, and hydrophilic radical is covered under coarse hydrophobic layer on cotton fiber.And by with micro-nano The POSS of size is even more with hackly structure that reactant is cross-linked to form and increases hydrophobic effect.

Claims (8)

1. it is a kind of based on ultraviolet light polymerization react bafta free-floride water-repellent finishing method, it is characterised in that comprise the following steps:
Step 1):Bafta is roughened first, is subsequently placed in the acetic acid of the 3- mercaptopropyltriethoxysilanes of 1~5wt% Sulfhydryl modified, concussion, fully cleaning are carried out in ethyl ester solution, vacuum drying obtains pre-treatment bafta;
Step 2):The organic solvent solution containing ethenyl cage model sesquialter siloxane, hydrosulphonyl silane or alkyl hydrosulfide is prepared, by mercapto Base modified cotton fabric impregnates wherein, is processed based on click chemistry principle under the conditions of ultraviolet light polymerization and obtains surface with close super thin The floride-free water repellent bafta of water effect.
It is 2. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The bafta is pure continuous yarn fabric or cotton fiber blended fabric.
It is 3. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The step 1) described in roughening be specially:With the NaOH and the paregal O of 5~10g/L of 10~20g/L, 60~80 It is roughened at a temperature of DEG C.
It is 4. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The step 1) in sulfhydryl modified temperature be 15~35 DEG C, the time is 2~3h.
It is 5. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The step 1) in 3- mercaptopropyltriethoxysilanes ethyl acetate solution in also include other have one or more sulfydryls The silane coupler of group.
It is 6. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The step 2) in organic solvent be dichloromethane and ethyl acetate at least one.
It is 7. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that The step 2) in hydrosulphonyl silane be silane structure compound or mixture with one or more mercapto groups;Alkyl sulfide Alcohol is long-chain fat race alkane compound or mixture with one or more mercapto groups.
It is 8. as claimed in claim 1 to be based on the bafta free-floride water-repellent finishing method that ultraviolet light polymerization reacts, it is characterised in that Ultraviolet light polymerization condition is specially in the step 2:Using light trigger, the light trigger includes 2,2- dimethoxy -2- At least one in phenyl acetophenone and 2,2- dihydromethyl propionic acid.
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