I-Waterborne polyurethane luhlobo olutsha lwenkqubo ye-polyurethane esebenzisa amanzi endaweni ye-organic solvents njengendlela yokusabalalisa. Ineenzuzo zokungangcoliseki, ukhuseleko kunye nokuthembeka, iipropathi ezigqwesileyo zoomatshini, ukuhambelana okuhle, kunye nokuguqulwa okulula.
Nangona kunjalo, izixhobo ze-polyurethane zikwanengxaki yokunganyangeki kwamanzi, ukuxhathisa ubushushu, kunye nokumelana ne-solvent ngenxa yokunqongophala okuzinzileyo kwebhondi ezinqamlezayo.
Ngoko ke, kuyimfuneko ukuphucula kunye nokwandisa iipropati ezahlukeneyo zesicelo se-polyurethane ngokuzisa ii-monomers ezisebenzayo ezifana ne-organic fluorosilicone, i-epoxy resin, i-acrylic ester, kunye ne-nanomaterials.
Phakathi kwazo, izinto eziguquguqukayo ze-nanomaterial ze-polyurethane zinokuphucula kakhulu iipropathi zabo zoomatshini, ukuxhathisa ukunxiba, kunye nokuzinza kwe-thermal. Iindlela zokuguqula ziquka indlela yokudibanisa i-composite, indlela ye-polymerization ye-in-situ, indlela yokudibanisa, njl.
Nano Silica
I-SiO2 inesakhiwo senethiwekhi esine-dimensional ezintathu, kunye nenani elikhulu lamaqela asebenzayo e-hydroxyl ebusweni bayo. Iyakwazi ukuphucula iimpawu ezibanzi ze-composite emva kokudityaniswa ne-polyurethane yi-covalent bond kunye ne-van der Waals amandla, njengokuguquguquka, ukuxhathisa ubushushu obuphezulu kunye nobushushu obuphantsi, ukuchasana nokuguga, njl. UGuo et al. i-nano-SiO2 eyenziwe nge-polyurethane eguqulweyo kusetyenziswa indlela ye-polymerization ye-in-situ. Xa umxholo we-SiO2 wawumalunga ne-2% (wt, i-mass fraction, efanayo ngezantsi), i-viscosity ye-shear kunye namandla e-peel ye-adhesive yaphuculwa ngokusisiseko. Xa kuthelekiswa ne-polyurethane esulungekileyo, ukumelana nobushushu obuphezulu kunye namandla okuqina nawo anyuke kancinci.
Nano Zinc oxide
I-Nano ZnO inamandla omatshini aphezulu, i-antibacterial efanelekileyo kunye ne-bacteriostatic properties, kunye nekhono eliqinileyo lokufunxa imisebe ye-infrared kunye nokukhusela okulungileyo kwe-UV, okwenza ukuba ifaneleke ukwenza izinto ezinemisebenzi ekhethekileyo. UAwad et al. wasebenzisa indlela ye-nano positron ukubandakanya izihluzi ze-ZnO kwi-polyurethane. Uphononongo lufumene ukuba kukho unxibelelwano phakathi kwe-nanoparticles kunye ne-polyurethane. Ukwandisa umxholo we-nano ZnO ukusuka kwi-0 ukuya kwi-5% yokwandisa ukushisa kweglasi (Tg) ye-polyurethane, eyaphucula ukuzinza kwayo kwe-thermal.
Nano Calcium Carbonate
Ukusebenzisana okuqinileyo phakathi kwe-nano CaCO3 kunye ne-matrix kwandisa kakhulu amandla okuqina ezinto ze-polyurethane. Gao et al. okokuqala ukulungiswa kwe-nano-CaCO3 kunye ne-oleic acid, kwaye emva koko ilungiswe i-polyurethane / i-CaCO3 nge-in-situ polymerization. Uvavanyo lwe-infrared (FT-IR) lubonise ukuba i-nanoparticles yahlakazwa ngokufanayo kwi-matrix. Ngokweemvavanyo zokusebenza koomatshini, kwafunyaniswa ukuba i-polyurethane eguqulwe nge-nanoparticles inamandla aphezulu okuqina kune-polyurethane ecocekileyo.
Igraphene
IGraphene (G) sisakhiwo esimaleko esidityaniswe yi-SP2 hybrid orbitals, ebonisa ukuqhuba okugqwesileyo, ukuhanjiswa kwe-thermal, kunye nokuzinza. Inamandla aphezulu, ukuqina okuhle, kwaye kulula ukugoba. Wu et al. I-synthesized Ag / G / PU nanocomposites, kunye nokunyuka komxholo we-Ag / G, ukuzinza kwe-thermal kunye ne-hydrophobicity yezinto ezidibeneyo zaqhubeka ziphucula, kwaye ukusebenza kwe-antibacterial kwanda ngokufanelekileyo.
IiNanotubes zeCarbon
I-Carbon nanotubes (i-CNTs) i-tubular nanomaterials enye-dimensional idityaniswe ngama-hexagons, kwaye okwangoku enye yezinto eziphathekayo ezinoluhlu olubanzi lwezicelo. Ngokusebenzisa amandla ayo aphezulu, i-conductivity, kunye nepropathi edibeneyo ye-polyurethane, ukuzinza kwe-thermal, iipropathi zoomatshini, kunye nokuhanjiswa kwezinto eziphathekayo kunokuphuculwa. Wu et al. yazisa i-CNTs ngokusebenzisa i-polymerization ye-in-situ ukulawula ukukhula kunye nokwakhiwa kweengqungquthela ze-emulsion, okwenza ukuba i-CNTs ihlakazwe ngokufanayo kwi-matrix ye-polyurethane. Ngomxholo okhulayo we-CNTs, amandla okuqina ezinto ezidibeneyo aphuculwe kakhulu.
Inkampani yethu ibonelela ngomgangatho ophezulu we-Fumed Silica,Ii-Anti-hydrolysis Agents (i-crosslinking agents, iCarbodiimide), iAbsorber UV, njl., ephucula kakhulu ukusebenza kwe-polyurethane.
Ixesha lokuposa: Jan-10-2025