Ukusetshenziswa kwe-Nano-materials ku-Modified Waterborne Polyurethane Adhesive

I-Waterborne polyurethane wuhlobo olusha lwesistimu ye-polyurethane esebenzisa amanzi esikhundleni sezincibilikisi zemvelo njengendlela yokuhlakaza. Inezinzuzo zokungangcoli, ukuphepha nokuthembeka, izakhiwo ezinhle kakhulu zokusebenzisa imishini, ukuhambisana okuhle, nokuguqulwa okulula.
Kodwa-ke, izinto ze-polyurethane nazo zinenkinga yokungazweli kahle kwamanzi, ukumelana nokushisa, nokumelana ne-solvent ngenxa yokuntuleka kwezibopho eziqinile zokuxhumanisa.

Ngakho-ke, kuyadingeka ukuthuthukisa kanye nokwandisa izici ezihlukahlukene zokusetshenziswa kwe-polyurethane ngokwethula ama-monomers asebenzayo njenge-organic fluorosilicone, i-epoxy resin, i-acrylic ester, nama-nanomaterials.
Phakathi kwazo, izinto zokwakha ze-polyurethane eziguquliwe nanomaterial zingathuthukisa kakhulu izakhiwo zazo zemishini, ukumelana nokugqoka, nokuzinza kokushisa. Izindlela zokuguqula zifaka indlela yenhlanganisela ye-intercalation, indlela ye-in-situ polymerization, indlela yokuhlanganisa, njll.

Nano Silica
I-SiO2 inokwakheka kwenethiwekhi enezinhlangothi ezintathu, enenombolo enkulu yamaqembu e-hydroxyl asebenzayo endaweni yayo. Ingakwazi ukuthuthukisa izici eziphelele zenhlanganisela ngemuva kokuhlanganiswa ne-polyurethane nge-covalent bond kanye ne-van der Waals force, njengokuguquguquka, ukumelana nokushisa okuphezulu nokuphansi, ukumelana nokuguga, njll. Guo et al. i-nano-SiO2 eyenziwe nge-polyurethane eguquliwe kusetshenziswa indlela ye-in-situ polymerization. Lapho okuqukethwe kwe-SiO2 cishe ku-2% (wt, ingxenyenamba enkulu, okufanayo ngezansi), i-viscosity ye-shear namandla e-peel okunamathelayo athuthukiswa ngokuyisisekelo. Uma kuqhathaniswa ne-polyurethane ehlanzekile, ukumelana nezinga lokushisa eliphezulu namandla okudonsa nakho kunyuke kancane.

I-Nano Zinc oxide
I-Nano ZnO inamandla amakhulu emishini, izakhiwo ezinhle zokulwa namagciwane kanye ne-bacteriostatic, kanye nekhono eliqinile lokumunca imisebe ye-infrared nokuvikela okuhle kwe-UV, okuyenza ifaneleke ukwenza izinto ezinemisebenzi ekhethekile. U-Awad et al. isebenzise indlela ye-nano positron ukuze ihlanganise izigcwalisi ze-ZnO ku-polyurethane. Ucwaningo luthole ukuthi kukhona ukuxhumana phakathi kwe-nanoparticles ne-polyurethane. Ukwandisa okuqukethwe kwe-nano ZnO kusuka ku-0 kuya ku-5% kukhuphule izinga lokushisa lokushintsha kwengilazi (Tg) ye-polyurethane, okuthuthukise ukuzinza kwayo okushisayo.

I-Nano Calcium Carbonate
Ukusebenzisana okuqinile phakathi kwe-nano CaCO3 kanye ne-matrix kuthuthukisa ngokuphawulekayo amandla aqinile wezinto ze-polyurethane. Gao et al. okokuqala kwalungiswa i-nano-CaCO3 nge-oleic acid, kwase kulungiswa i-polyurethane/CaCO3 nge-in-situ polymerization. Ukuhlolwa kwe-infrared (FT-IR) kubonise ukuthi ama-nanoparticles ahlakazeke ngokufanayo ku-matrix. Ngokusho kokuhlolwa kokusebenza kwemishini, kwatholakala ukuthi i-polyurethane eshintshwe ngama-nanoparticles inamandla aphezulu okuqinile kune-polyurethane ehlanzekile.

I-graphene
I-Graphene (G) iyisakhiwo esinezingqimba esihlanganiswe yi-SP2 hybrid orbitals, ebonisa ukusebenza kahle kakhulu, ukuqhutshwa kwe-thermal, nokuzinza. Inamandla aphezulu, ukuqina okuhle, futhi kulula ukugoba. Wu et al. ama-nanocomposites e-Ag/G/PU ahlanganisiwe, futhi ngokwanda kokuqukethwe kwe-Ag/G, ukuzinza kwe-thermal kanye ne-hydrophobicity yezinto eziyinhlanganisela kwaqhubeka nokuba ngcono, nokusebenza kwe-antibacterial nakho kwanda ngokufanele.

I-Carbon Nanotubes
Ama-Carbon nanotubes (CNTs) angama-tubular nanomaterials anohlangothi olulodwa axhunywe ngamaheksagoni, futhi okwamanje angenye yezinto ezinobubanzi obusetshenziswayo. Ngokusebenzisa amandla ayo aphezulu, ukuguquguquka, kanye nezakhiwo eziyinhlanganisela ye-polyurethane, ukuzinza kokushisa, izakhiwo zemishini, kanye nokuhamba kwezinto kungathuthukiswa. Wu et al. yethule ama-CNT nge-in-situ polymerization ukulawula ukukhula nokwakheka kwezinhlayiya ze-emulsion, okwenza ama-CNTs ahlakazeke ngokufanayo ku-polyurethane matrix. Ngokuqukethwe okwandayo kwama-CNTs, amandla aqinile wezinto ezihlanganisiwe athuthukiswe kakhulu.

Inkampani yethu ihlinzeka ngekhwalithi ephezulu ye-Fumed Silica,Ama-Anti-hydrolysis Agents (ama-crosslinking agents, i-Carbodiimide), Ama-Absorbers we-UV, njll, okuthuthukisa kakhulu ukusebenza kwe-polyurethane.