CN116180446A - Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release - Google Patents
Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release Download PDFInfo
- Publication number
- CN116180446A CN116180446A CN202310225588.XA CN202310225588A CN116180446A CN 116180446 A CN116180446 A CN 116180446A CN 202310225588 A CN202310225588 A CN 202310225588A CN 116180446 A CN116180446 A CN 116180446A
- Authority
- CN
- China
- Prior art keywords
- fabric
- hydrogel
- pnipaam
- pnipaam hydrogel
- raised fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000000017 hydrogel Substances 0.000 title claims abstract description 81
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 21
- 229920003213 poly(N-isopropyl acrylamide) Polymers 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 53
- 229920001690 polydopamine Polymers 0.000 claims abstract description 43
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 39
- 230000007613 environmental effect Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000002105 nanoparticle Substances 0.000 claims abstract description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 22
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 17
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 12
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 11
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 11
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 10
- 229960003638 dopamine Drugs 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000009940 knitting Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000009941 weaving Methods 0.000 claims description 6
- 239000012267 brine Substances 0.000 claims description 5
- -1 brine ions Chemical class 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000007853 buffer solution Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 238000012673 precipitation polymerization Methods 0.000 claims description 3
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims 2
- 235000011148 calcium chloride Nutrition 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000013505 freshwater Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000011258 core-shell material Substances 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000002759 woven fabric Substances 0.000 description 3
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 2
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 229960001149 dopamine hydrochloride Drugs 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008876 conformational transition Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28023—Fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28047—Gels
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/61—Polyamines polyimines
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Dispersion Chemistry (AREA)
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method of a PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release, which comprises the following steps: firstly preparing a raised fabric, coating a layer of PNIPAAm hydrogel with a porous structure on the surface of the raised fabric, and finally coating polydopamine nano Particles (PDA) and polypyrrole (PPy) on the surface of the raised fabric, and immersing the raised fabric into CaCl by adopting alternate cold and heat treatment 2 The solution is used for obtaining the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material. The method is more environment-friendly in the prior preparation technology, and has simple and convenient processThe method is easy to operate, solves the problems of poor moisture absorption performance, low water collection efficiency and leakage of moisture absorption salt in a low-humidity environment, ensures good moisture absorption of the material, has excellent photo-thermal conversion performance and water release performance, and improves the water collection efficiency, so that the material can provide a promising solution for clean water production in arid and inland/remote areas.
Description
Technical Field
The invention relates to the technical field of porous adsorption materials, environment and energy, in particular to a preparation method of a PNIPAAm hydrogel-based raised fabric capable of super-absorbing and releasing water.
Background
With the development of human society, the increasing demand for fresh water resources and the increasing problem of water pollution have led to a worldwide shortage of fresh water resources. In order to meet the increasing demand for fresh water, a process for obtaining fresh water from sea water, sewage water, and atmospheric water has received much attention. The content of the atmospheric water is rich and accounts for about 10% of the global lake water, so that the atmospheric water collection technology is widely used as one of effective ways for obtaining fresh water resources. At present, there are many materials for collecting atmospheric water, in which conventional adsorption materials such as silica gel, alumina, molecular sieve, natural clay, etc. can capture moisture under high humidity, but the moisture collecting capability in a lower humidity range is still poor, and a strong acting force is easily generated between the materials and water, which is not beneficial to release of moisture, so that the water collecting efficiency is reduced. Later, researchers began to gradually utilize new adsorbent materials (e.g., MOF, COF, mexene, etc.) for atmospheric water collection, which have excellent moisture absorption capabilities, and which allow rapid moisture collection even in environments with humidity below 30%. However, the synthetic process of these emerging adsorption materials is complex, the cost is high, the yield is low, and the like, which limit the mass production of the adsorption materials, and are further disadvantageous in application in practical life.
For example, chinese patent CN 114940799A discloses a method for preparing a PAA-PNIPAAm hydrogel material with a core-shell structure for environmental water collection, which comprises preparing a large-pore-size hydrogel of a core-shell poly-N-isopropyl acrylamide (PNIPAAm) by ultraviolet irradiation, coating a layer of small-pore-size sodium Polyacrylate (PAA) hydrogel with an open pore structure on the surface of the PNIPAAm hydrogel, coating polydopamine nanoparticles (PDA) on the surface of the PAA hydrogel, and immersing the coated PAA-PNIPAAm hydrogel in LiCl solution to obtain the environmental water collection material with a core-shell structure pda@paa-PNIPAAm-LiCl hydrogel. For example, chinese patent CN114573825B discloses a "ligand exchanged hollow MILs-101 metal organic frame material, a preparation method and an application thereof", wherein the hollow MILs-101 metal organic frame material is obtained by acid etching the MILs-101 metal organic frame material, then the hollow MILs-101 metal organic frame material and 1,1 '-ferrocenyldicarboxylic acid are dispersed in a solvent, acetic acid is added and mixed uniformly to form a suspension, the suspension is reacted at 80-160 ℃ for 6-24 hours, and after cooling, the suspension is centrifuged, washed and dried, the 1,1' -ferrocenyldicarboxylic acid ligand exchanged hollow MILs-101 metal organic frame material is obtained.
The hydrogel is a three-dimensional porous structure polymer material with strong moisture absorption performance, and has been widely used in the aspect of atmospheric water collection due to the advantages of low cost, simple preparation, strong moisture absorption capability and the like. Among them, PNIPAAm is a typical thermally responsive smart hydrogel which can achieve rapid water collection through self-unique hydrophilic-hydrophobic conformational transition and shrinkage, which effectively reduces the energy consumption of the hydrogel during water release. The advantages ensure that the hydrogel can continuously convey water to the surface and quickly evaporate, so that the hydrogel has higher water retention and good recyclability, and becomes a very promising environmental water collecting material. In addition, the structure of the atmospheric water collector should be further improved, and the traditional two-dimensional (2D) plane structure is changed into an advanced three-dimensional (3D) macroscopic structure, because the plane structure usually causes high light reflection, so that huge energy loss is caused, and the three-dimensional macroscopic structure (such as cone, lotus, paper folding rose, cylinder, honeycomb and the like) can make incident light undergo multiple reflection, so that the light absorption and water release efficiency of the atmospheric water collector are facilitated. Currently, researchers have used inexpensive and easily woven fabrics in the field of water purification, woven fabrics having various three-dimensional shapes such as honeycomb structures, square lattice structures, through-hole structures, etc. through varied weave structures, and the woven fabrics have been confirmed to have high water release efficiency. Thus, the invention discloses a PNIPAAm hydrogel-based raised fabric loopThe collector uses PNIPAAm hydrogel as adsorption material and CaCl 2 Is a moisture absorbent, and uses polydopamine/polypyrrole (PDA/PPy) as a light absorbent. Wherein the interaction of the alternating periodic raised structures with the PDA/PPy allows for a maximum level of light absorption by multiple reflections, scattering. Meanwhile, the porous structure and the high specific surface area can effectively enhance the moisture capturing and storing capacity of the raised fabric, and the temperature-sensitive PNIPAAm hydrogel can quickly evaporate and collect moisture collected at night under illumination. In addition, the calcium chloride and the surface of the hydrogel are combined by strong valence bonds by adopting a cold-hot circulation and salinization treatment method so as to prevent leakage of the hygroscopic salt.
Disclosure of Invention
The invention aims at: the preparation method of the PNIPAAm hydrogel-based raised fabric with super strong moisture absorption and water release adopts a precipitation polymerization method to prepare the environmental water collecting material of the hydrogel-based raised fabric, and solves the problems of poor moisture absorption performance, poor water release performance, low collecting efficiency, leakage of moisture absorption salt and the like of the adsorbing material.
The technical scheme of the invention is as follows:
step one, preparing a raised fabric, inputting a pattern card of the raised fabric into a control panel of a loom, and weaving the fabric by interweaving warp and weft yarns. After knitting is completed, the weft yarns among the warp yarns are cut off, and the pile fabric is manufactured after brushing and finishing;
step two, preparing PNIPAAm hydrogel-based raised fabric, immersing the raised fabric into a mixed solution containing Sodium Dodecyl Sulfate (SDS), ammonium persulfate (KPS), NIPAAm and N, N-methylene bisacrylamide, and sealing at room temperature overnight to form the PNIPAAm hydrogel-based raised fabric.
Step three, preparing a PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material, firstly preparing a raised fabric, then coating a layer of PNIPAAm hydrogel with a porous structure on the surface of the raised fabric, finally coating polydopamine nano Particles (PDA) and polypyrrole (PPy) on the surface of the raised fabric, and immersing the raised fabric into CaCl by adopting alternate cold and heat treatment 2 The solution is used for obtaining a PDA/PPy/PNIPAAm hydrogel matrixA pile fabric environmental water collection material;
further, the pile fabric is prepared as described in step (1), and first, a pattern of a pile pattern is input to a control panel of the loom. Secondly, arranging the warp yarns on a loom according to a drafting drawing, and selectively dividing the warp yarns into two parts according to technological requirements. The weft yarn is then wound on the shuttle and the weaving process is started. After the knitting is finished, the weft yarns among the warp yarns are cut off, and after brushing and finishing, the tufted structure is formed and arranged on the surface of the fabric in a strip shape, so that the raised fabric is obtained.
Further, the PNIPAAm hydrogel-based raised fabric prepared in the step (2) is prepared by mixing Sodium Dodecyl Sulfate (SDS), ammonium persulfate (KPS), NIPAAm and N, N-Methylenebisacrylamide (MBA) by a precipitation polymerization method to prepare a microgel solution with unsaturated double bonds, and introducing N 2 Mix under magnetic stirring at 60 ℃ for 40 minutes. Next, NIPAAm and TEMED promoter were added sequentially to the reaction. Finally, the pile fabric was immersed in the above mixed solution and sealed overnight at room temperature to form a microgel crosslinked PNIPAAm hydrogel-based pile fabric.
Further, the mass concentration of the sodium dodecyl sulfate required in the mixed aqueous solution in the step (2) is 0.3-2%; the mass concentration of the ammonium persulfate is 2-10 percent (accounting for the concentration mass percent of the monomer NIPAAm); the mass concentration of the NIPAAm is 2% -14%; the mass concentration of the N, N methylene bisacrylamide is 0.1-0.9%; the mass concentration of the TEMED accelerator is 1-5%.
Further, preparing PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material in the step (3), firstly preparing raised fabric, then coating a layer of PNIPAAm hydrogel with a porous structure on the surface of the raised fabric, finally coating polydopamine nano Particles (PDA) and polypyrrole (PPy) on the surface of the raised fabric, and immersing the raised fabric into CaCl by adopting alternate cold and heat treatment 2 The method for obtaining the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material comprises the following steps of: firstly, preparing PNIPAAm hydrogel-based raised fabric according to the step (2), and then adding the PNIPAAm hydrogel-based raised fabricInto HCl (100 mL,1 mol/L) buffer containing Dopamine (DA) and pyrrole (Py) for 1h. Subsequently, feCl is added under gentle stirring 3 A solution of/HCl (3 g/33 mL) was slowly added to the above mixture and polymerized for 6 hours. As the color of the fabric gradually changed to black, the fabric was removed and immersed in ethanol and deionized water for washing multiple times to remove unreacted monomers and unstable polymers. Next, the obtained pile fabric was immersed in cold deionized water (5 ℃) for 15 minutes, then transferred to hot deionized water (60 ℃) for 15 minutes, and the alternate cold and heat treatments were repeated three times. Subsequently, caCl at 5 ℃ 2 The fabric was treated in aqueous solution for 12 hours to permeate brine ions and washed three times with fresh hot and cold water to remove non-precipitated CaCl 2 Forming the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material.
Further, in the step (3), the concentration of the dopamine is 0.5-10 mg/mL; the concentration of the pyrrole is 0.2-1 mL/mL; the CaCl 2 The concentration of the solution is 0.1-0.6 g/mL.
The invention has the advantages that:
the invention combines porous hydrogel materials with microstructures and raised fabrics with macrostructures to prepare the environmental water collecting material, and the interaction of the periodic raised structures which are staggered with each other and PDA/PPy can realize the maximum level of light absorption through multiple reflection and scattering. At the same time, the porous structure and the high specific surface area can effectively enhance the moisture absorption performance of the water collecting material (3.1 g g -1 RH 90%), and the thermosensitive PNIPAAm hydrogel can rapidly evaporate and collect water collected at night under light (1.75 kg m -2 h -1 ，1sun)。
The invention adopts the cold and hot circulation and salinization treatment method to lead the calcium chloride to generate strong valence bond combination with the surface of the hydrogel, thereby effectively solving the leakage problem of the hygroscopic salt.
The water collecting material obtained by adopting the simple green preparation method has excellent photo-thermal conversion performance, the surface temperature can be quickly increased to 76 ℃ within 5min under the irradiation of 1 sunlight intensity, and the water collecting efficiency is greatly improved (figure 4).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein, the liquid crystal display device comprises a liquid crystal display device,
FIG. 1 is an SEM image of the surface of a pile fabric prepared as described in comparative example one;
FIG. 2 is an SEM image of the surface of a PNIPAAm-based pile fabric prepared as described in comparative example two;
FIG. 3 is a SEM image of the surface of a material prepared in example one of the environmental water collection material of a PDA/PPy/PNIPAAm hydrogel-based pile fabric of the present invention;
FIG. 4 is a photo-thermal conversion performance of a material prepared in example one of the preparation method of the environmental water collection material for PDA/PPy/PNIPAAm hydrogel-based pile fabric of the present invention;
FIG. 5 is a graph showing the hygroscopic properties of a material prepared in example one of the preparation method of the environmental water collection material for PDA/PPy/PNIPAAm hydrogel-based pile fabric according to the present invention under different humidity conditions;
FIG. 6 is a graph showing the water release properties of a material prepared in example one of the preparation method of the environmental water collection material for PDA/PPy/PNIPAAm hydrogel-based pile fabric of the present invention;
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the following description refers to the accompanying drawings, examples and comparative examples. The invention is not limited to the embodiments listed but includes any other known modification within the scope of the claims that follow.
First, reference herein to "embodiment one" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present invention. In the following detailed description of the embodiments of the present invention, the schematic drawings are not to be taken in a local scale for the convenience of description, and are merely examples, which should not limit the scope of the present invention. In addition, the three-dimensional space of length, width and depth should be included in actual fabrication.
In addition, the letter abbreviations in the present invention are all fixed abbreviations in the art, wherein part of the letter text is explained as follows: PNIPAAm: poly N-isopropyl acrylamide; PPy: polypyrrole; PDA: polydopamine; SDS: sodium dodecyl sulfate; KPS: ammonium persulfate; MBA: n, N methylene bisacrylamide; TEMED: n, N' -tetramethyl diethylamine; LCST: a low critical transition temperature; SEM: and (5) electronically scanning and developing the image.
Example 1
The preparation method of the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material comprises the following steps:
first step, preparing raised fabrics
First, a pattern of raised patterns is input to a control panel of the loom. Secondly, arranging the warp yarns on a loom according to a drafting drawing, and selectively dividing the warp yarns into two parts according to technological requirements. The weft yarn is then wound on the shuttle and the weaving process is started. After the knitting is finished, the weft yarns among the warp yarns are cut off, and after brushing and finishing, the tufted structure is formed and arranged on the surface of the fabric in a strip shape, so that the raised fabric is obtained.
Second step, PNIPAAm hydrogel-based raised fabric is prepared
Sequentially adding 1.13g of NIPAAm monomer, 0.0616g of MBA crosslinking agent and 0.027g of KPS initiator into 50mL of pure water, and introducing N 2 And mixed by stirring with a magnetic bar until completely dissolved. Next, 0.27g of SDS was added to the above mixed solution, and mixed under magnetic stirring at 60℃for 40 minutes until the transparent solution became opaque to form PNIPAm microgel. Next, 7g of NIPAAm and 0.5mL of TEMED accelerator were added sequentially to the reaction. Finally, the pile fabric was immersed in the above mixed solution and sealed overnight at room temperature to form a microgel crosslinked PNIPAAm hydrogel-based pile fabric.
Thirdly, preparing the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material
First, 0.05g of dopamine hydrochloride (DA) and 0.6mL of pyrrole monomer (Py) were dissolved in 100mL of 1mol/L aqueous HCl. Then, PNIPAAm hydrogel-based pile fabric was immersed in the above mixed solution for 1 hour, and FeCl was added under gentle agitation 3 A solution of/HCl (3 g/33 mL) was slowly added to the above mixture and polymerized for 6 hours. As the color of the fabric gradually changed to black, the fabric was removed and immersed in ethanol and deionized water for washing multiple times to remove unreacted monomers and unstable polymers. Next, the obtained pile fabric was immersed in cold deionized water (5 ℃) for 15 minutes, then transferred to hot deionized water (60 ℃) for 15 minutes, and the alternate cold and heat treatments were repeated three times. Subsequently, 0.2g/mL CaCl at 5 ℃ 2 The fabric was treated in aqueous solution for 12 hours to permeate brine ions and washed three times with fresh hot and cold water to remove non-precipitated CaCl 2 Forming the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material.
The surface of a PDA/PPy/PNIPAAm hydrogel based pile fabric environmental water collection material prepared in this example is shown in fig. 3. As shown in fig. 3, the fiber interstices after the PNIPAAm hydrogel gel treatment are filled with a large amount of hydrogels having a highly interconnected pore structure, which is advantageous for moisture absorption, transport and storage. And a large amount of fibrous PPy polymer is attached to the surfaces of the PDA/PPy modified fibers or the hydrogel holes.
The moisture absorption performance of the environmental water collection material of the PDA/PPy/PNIPAAm hydrogel-based raised fabric prepared in this example is shown in FIG. 5. As shown in FIG. 5, the material prepared in this example can absorb 3.1. 3.1g g under 90% humidity -1 Is a water content of (a) a water content of (b).
Comparative example one
The comparative example prepared a PDA/PPy/PNIPAAm hydrogel based plain weave fabric environmental water collection material according to the following steps:
first step, preparing a planar fabric
First, a pattern card of a plain weave is input to a control panel of the loom. Secondly, arranging the warp yarns on a loom according to a drafting drawing, and selectively dividing the warp yarns into two parts according to technological requirements. The weft yarn is then wound on the shuttle and the weaving process is started. After the knitting is completed, a planar fabric is obtained.
Second step, PNIPAAm hydrogel base plane fabric is prepared
Sequentially adding 1.13g of NIPAAm monomer, 0.0616g of MBA crosslinking agent and 0.027g of KPS initiator into 50mL of pure water, and introducing N 2 And mixed by stirring with a magnetic bar until completely dissolved. Next, 0.27g of SDS was added to the above mixed solution, and mixed under magnetic stirring at 60℃for 40 minutes until the transparent solution became opaque to form PNIPAAm microgel. Next, 7g of NIPAAm and 0.5mL of TEMED accelerator were added sequentially to the reaction. Finally, the planar fabric was immersed in the above mixed solution and sealed overnight at room temperature to form a microgel crosslinked PNIPAAm hydrogel-based planar fabric.
Third step, preparing PDA/PPy/PNIPAAm hydrogel-based plane fabric environmental water collecting material
First, 0.05g of dopamine hydrochloride (DA) and 0.6mL of pyrrole monomer (Py) were dissolved in 100mL of 1mol/L aqueous HCl. Then, PNIPAAm hydrogel-based planar fabric was immersed in the above mixed solution for 1 hour, and FeCl was added under gentle stirring 3 A solution of/HCl (3 g/33 mL) was slowly added to the above mixture and polymerized for 6 hours. As the color of the fabric gradually changed to black, the fabric was removed and immersed in ethanol and deionized water for washing multiple times to remove unreacted monomers and unstable polymers. Next, the resulting planar fabric was immersed in cold deionized water (5 ℃) for 15 minutes, then transferred to hot deionized water (60 ℃) for 15 minutes, and the alternate cold and heat treatments were repeated three times. Subsequently, 0.2g/mL CaCl at 5 ℃ 2 The fabric was treated in aqueous solution for 12 hours to permeate brine ions and washed three times with fresh hot and cold water to remove non-precipitated CaCl 2 Forming the PDA/PPy/PNIPAAm hydrogel-based planar fabric environmental water collecting material.
Referring to FIG. 2, FIG. 2 is an SEM image of the surface of a PDA/PPy/PNIPAAm hydrogel-based planar fabric environmental water collection material prepared as described in comparative example one. As shown in FIG. 2, the PDA/PPy/PNIPAAm hydrogel-based planar fabric has successfully attached a large number of porous hydrogels.
Comparative example two
The comparative example was prepared as follows:
first step, preparing raised fabrics
First, a pattern of raised patterns is input to a control panel of the loom. Secondly, arranging the warp yarns on a loom according to a drafting drawing, and selectively dividing the warp yarns into two parts according to technological requirements. The weft yarn is then wound on the shuttle and the weaving process is started. After the knitting is finished, the weft yarns among the warp yarns are cut off, and after brushing and finishing, the tufted structure is formed and arranged on the surface of the fabric in a strip shape, so that the raised fabric is obtained.
Second step, preparing PDA/PNIPAAm hydrogel-based raised fabric environmental water collecting material
1L Tris-HCl buffer solution (pH=8.5, 50 mM) was prepared, then PNIPAAm hydrogel-based pile fabric was added to the buffer solution, and after sufficient swelling for 24 hours, the sample was again immersed in a solution containing dopamine (2 mg/mL) and CuSO 4 (5mM)/H 2 O 2 (19.6 mM) in Tris-HCl buffer solution, magnetically stirred for 4 hours. Subsequently, the samples were washed with water overnight and placed in a freeze dryer for pre-freezing and freeze drying treatments to obtain PDA/PNIPAAm hydrogel-based pile fabrics. Finally, the resulting flat fabric was immersed in cold deionized water (5 ℃) for 15 minutes, then transferred to hot deionized water (60 ℃) for 15 minutes, and the alternate cold and heat treatments were repeated three times. Subsequently, 0.2g/mL CaCl at 5 ℃ 2 The fabric was treated in aqueous solution for 12 hours to permeate brine ions and washed three times with fresh hot and cold water to remove non-precipitated CaCl 2 The PDA/PNIPAAm hydrogel based pile fabric environmental water collection material was formed.
In summary, the invention discloses a preparation method of a PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release, which is more environment-friendly in the prior preparation technology, has simple and convenient process and is easy to operate, and solves the problems of low photo-thermal conversion efficiency, poor moisture absorption performance, low water collection efficiency, leakage of hygroscopic salt and the like of an adsorption material. The PDA/PPy/PNIPAAm hydrogel-based raised fabric integrating the functions of light and heat collection, moisture absorption and water release can collect water under the condition of lower humidity, and is expected to be an effective way for solving the problem of water resource shortage.
It should be noted that the above embodiments and comparative examples are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. A method for preparing a PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release, which is characterized by comprising the following steps: firstly preparing a raised fabric, coating a layer of PNIPAAm hydrogel with a porous structure on the surface of the prepared raised fabric, and finally coating polydopamine nano Particles (PDA) and polypyrrole (PPy) on the surface of the raised fabric, and immersing the raised fabric into CaCl2 solution by adopting alternate cold and heat treatment to obtain the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material.
2. The method of making a pile fabric according to claim 1, wherein: the pattern of the raised structures is input to the control panel of the loom. Secondly, arranging the warp yarns on a loom according to a drafting drawing, and selectively dividing the warp yarns into two parts according to technological requirements. The weft yarn is then wound on the shuttle and the weaving process is started. After the knitting is finished, the weft yarns among the warp yarns are cut off, and after brushing and finishing, the tufted structure is formed and arranged on the surface of the fabric in a strip shape, so that the raised fabric is obtained.
3. The method of making PNIPAAm hydrogel-based pile fabric according to claim 1, wherein: sodium Dodecyl Sulfate (SDS), ammonium persulfate (KPS), N1PAAm and N, N Methylene Bisacrylamide (MBA) are mixed to prepare a microgel solution with unsaturated double bonds by a precipitation polymerization method, N2 is introduced, and the mixture is stirred and mixed for 40 minutes under magnetic force at 60 ℃. Next, NIPAAm and TEMED promoter were added sequentially to the reaction. Finally, the pile fabric was immersed in the above mixed solution and sealed overnight at room temperature to form a microgel crosslinked PNIPAAm hydrogel-based pile fabric.
4. A PNIPAAm hydrogel-based pile fabric preparation method according to claim 3, characterized by: the mass concentration of the required sodium dodecyl sulfate in the mixed aqueous solution is 0.3-2%; the mass concentration of the ammonium persulfate is 2-10 percent (accounting for the concentration mass percent of the monomer NIPAAm); the mass concentration of the NIPAAm is 2% -14%; the mass concentration of the N, N methylene bisacrylamide is 0.1-0.9%; the mass concentration of the TEMED accelerator is 1% -5%.
5. The method for preparing the PNIPAAm hydrogel-based pile fabric with super-strong moisture absorption and release properties according to claim 1, which is characterized in that: first, PNIPAAm hydrogel-based pile fabric was prepared as claimed in claim 4, and then the PNIPAAm hydrogel-based pile fabric was added to HCl (100 mL,1 mol/L) buffer solution containing Dopamine (DA) and pyrrole (Py) for 1h. Subsequently, feCl is added under gentle stirring 3 A solution of/HCl (3 g/33 mL) was slowly added to the above mixture and polymerized for 6 hours. As the color of the fabric gradually changed to black, the fabric was removed and immersed in ethanol and deionized water for washing multiple times to remove unreacted monomers and unstable polymers. Next, the obtained pile fabric was immersed in cold deionized water (5 ℃) for 15 minutes, then transferred to hot deionized water (60 ℃) for 15 minutes, and the alternate cold and heat treatments were repeated three times. Subsequently, caCl at 5 ℃ 2 The fabric was treated in aqueous solution for 12 hours to permeate brine ions and washed three times with fresh hot and cold water to remove non-precipitated CaCl 2 Forming the PDA/PPy/PNIPAAm hydrogel-based raised fabric environmental water collecting material.
6. The method for preparing a PNIPAAm hydrogel-based pile fabric having superior moisture absorption and release properties according to claim 5, wherein; the concentration of the dopamine is 0.5-10 mg/mL; the concentration of the pyrrole is 0.2-1 mL/mL; the CaCl 2 The concentration of the solution is 0.1-0.6 g/mL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310225588.XA CN116180446A (en) | 2023-03-10 | 2023-03-10 | Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310225588.XA CN116180446A (en) | 2023-03-10 | 2023-03-10 | Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116180446A true CN116180446A (en) | 2023-05-30 |
Family
ID=86438411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310225588.XA Pending CN116180446A (en) | 2023-03-10 | 2023-03-10 | Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116180446A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108395548A (en) * | 2018-02-11 | 2018-08-14 | 浙江工业大学 | A kind of preparation method, product and the application of the double-deck hydrogel with salt-temperature double-response |
| CN111962290A (en) * | 2020-08-19 | 2020-11-20 | 上海理工大学 | Novel temperature-sensitive PNIPAAm-CNT-PNMA fiber hydrogel and preparation method thereof |
| US20210069639A1 (en) * | 2018-05-17 | 2021-03-11 | King Abdullah University Of Science And Technology | Water vapor harvesting materials and devices |
| CN113999476A (en) * | 2021-12-21 | 2022-02-01 | 太原理工大学 | Dual-stimulus-responsive conductive composite hydrogel and preparation method and application thereof |
| CN114940799A (en) * | 2022-06-14 | 2022-08-26 | 天津工业大学 | Preparation method of core-shell structure PAA-PNIPAAm hydrogel material for collecting environmental water |
-
2023
- 2023-03-10 CN CN202310225588.XA patent/CN116180446A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108395548A (en) * | 2018-02-11 | 2018-08-14 | 浙江工业大学 | A kind of preparation method, product and the application of the double-deck hydrogel with salt-temperature double-response |
| US20210069639A1 (en) * | 2018-05-17 | 2021-03-11 | King Abdullah University Of Science And Technology | Water vapor harvesting materials and devices |
| CN111962290A (en) * | 2020-08-19 | 2020-11-20 | 上海理工大学 | Novel temperature-sensitive PNIPAAm-CNT-PNMA fiber hydrogel and preparation method thereof |
| CN113999476A (en) * | 2021-12-21 | 2022-02-01 | 太原理工大学 | Dual-stimulus-responsive conductive composite hydrogel and preparation method and application thereof |
| CN114940799A (en) * | 2022-06-14 | 2022-08-26 | 天津工业大学 | Preparation method of core-shell structure PAA-PNIPAAm hydrogel material for collecting environmental water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111074534B (en) | Three-dimensional porous seawater desalination thermal evaporation material, and preparation method and application thereof | |
| US20220219142A1 (en) | Polymeric lanthanum nanocomposite, and preparation method and application thereof | |
| JP4529145B2 (en) | Slow moisture absorption and release cross-linked acrylic fiber | |
| CN105609326B (en) | A kind of preparation method and applications of polypyrrole/graphene/bacteria cellulose conducting membrane material | |
| CN110038529A (en) | A kind of preparation method of three-dimensional fiber base composite aerogel type adsorbent | |
| CN109776851A (en) | A kind of bacteria cellulose/metal sulfide plural gel and preparation method thereof and conductive processing method | |
| CN111072088A (en) | Seawater evaporator and application thereof | |
| CN100519919C (en) | Synthetic fiber and its fabric hydrophilic finish method | |
| CN109629085B (en) | Graphene conductive fabric with space three-dimensional network structure, and preparation method and application thereof | |
| CN110327895A (en) | A kind of graphene oxide/calcium alginate Supported Melamine sponge composite adsorbing material and its preparation method and application | |
| CN109354097A (en) | It is a kind of to accelerate the photo-thermal plate evaporated brine of seawater and application method | |
| CN114940799A (en) | Preparation method of core-shell structure PAA-PNIPAAm hydrogel material for collecting environmental water | |
| CN113527828A (en) | Amphoteric polyelectrolyte photo-thermal hydrogel, and preparation and application thereof | |
| CN111926562B (en) | ZIF-8 composite TiO 2 Functional fabric and preparation method thereof | |
| CN116180446A (en) | Preparation method of PNIPAAm hydrogel-based raised fabric with super-strong moisture absorption and water release | |
| CN115124101A (en) | Interface evaporation device with porous hydrophobic/hydrophilic structure and preparation method thereof | |
| CN111072087A (en) | Three-dimensional seawater evaporator and application thereof | |
| CN117342640A (en) | Hydrogel-based fluffing fabric with high evaporation performance and preparation method thereof | |
| CN209618927U (en) | A kind of photo-thermal plate for accelerating seawater to evaporate brine | |
| CN113684686B (en) | Alginate-calcium carbonate composite microsphere modified radiation cooling passive cooling fabric and preparation method thereof | |
| CN202730378U (en) | Ageing-resistant oxford fabric | |
| CN215590122U (en) | White embryo cloth with high water absorption | |
| CN108221129A (en) | Three-dimensional interstitital texture collection thermal evaporation fabric and its preparation, application method and purposes | |
| CN105688864B (en) | One heavy metal species processing screen cloth and preparation method thereof | |
| CN205472761U (en) | Autocatalysis is fabric for sewage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |