Kugwiritsa ntchito Nano-matadium mu Modified Waterborne Polyurethane Adhesive

Waterborne polyurethane ndi mtundu watsopano wa polyurethane system yomwe imagwiritsa ntchito madzi m'malo mwa zosungunulira organic monga sing'anga yobalalitsira. Lili ndi ubwino wosaipitsa, chitetezo ndi kudalirika, katundu wamakina abwino kwambiri, kugwirizanitsa bwino, ndi kusinthidwa kosavuta.
Komabe, zida za polyurethane zimavutitsidwanso ndi kusakanizika kwa madzi, kukana kutentha, komanso kukana zosungunulira chifukwa chosowa zomangira zokhazikika zolumikizirana.

Choncho, m'pofunika kusintha ndi kukhathamiritsa zosiyanasiyana ntchito katundu wa polyurethane poyambitsa monomers zinchito monga organic fluorosilicone, epoxy utomoni, acrylic ester, ndi nanomaterials.
Mwa iwo, zida za nanomaterial zosinthidwa za polyurethane zimatha kusintha kwambiri makina awo, kukana kuvala, komanso kukhazikika kwamafuta. Njira zosinthira zimaphatikizapo njira yophatikizira, in-situ polymerization njira, njira yophatikizira, ndi zina.

Nano Silika
SiO2 ili ndi mawonekedwe a maukonde atatu-dimensional, okhala ndi magulu ambiri a hydroxyl omwe amagwira ntchito pamtunda wake. Ikhoza kusintha katundu wathunthu wa gulu pambuyo kuphatikizidwa ndi polyurethane ndi covalent chomangira ndi van der Waals mphamvu, monga kusinthasintha, mkulu ndi otsika kutentha kukana, kukalamba kukana, etc. Guo neri Al. kupanga nano-SiO2 kusinthidwa polyurethane pogwiritsa ntchito in-situ polymerization njira. Pamene zinthu za SiO2 zinali pafupifupi 2% (wt, gawo lalikulu, momwemonso pansipa), kumeta ubweya wa ubweya ndi mphamvu ya peel ya zomatira zidasinthidwa. Poyerekeza ndi polyurethane yoyera, kukana kutentha kwambiri komanso kulimba kwamphamvu kwawonjezekanso pang'ono.

Nano Zinc oxide
Nano ZnO ili ndi mphamvu zamakina apamwamba, antibacterial ndi bacteriostatic properties, komanso mphamvu yamphamvu yoyamwa ma radiation ya infrared ndi chitetezo chabwino cha UV, ndikupangitsa kuti ikhale yoyenera kupanga zipangizo zokhala ndi ntchito zapadera. Awad et al. adagwiritsa ntchito njira ya nano positron kuti aphatikize zodzaza ZnO mu polyurethane. Kafukufukuyu adapeza kuti panali kulumikizana kwa mawonekedwe pakati pa nanoparticles ndi polyurethane. Kuchulukitsa zomwe zili mu nano ZnO kuchokera ku 0 mpaka 5% kumawonjezera kutentha kwa galasi (Tg) ya polyurethane, yomwe imapangitsa kuti matenthedwe azikhala okhazikika.

Nano Calcium Carbonate
Kulumikizana kolimba pakati pa nano CaCO3 ndi masanjidwewo kumawonjezera mphamvu zamakomedwe za zida za polyurethane. Gao et al. choyamba kusinthidwa nano-CaCO3 ndi asidi oleic, ndiyeno anakonza polyurethane/CaCO3 kudzera mu-situ polymerization. Kuyesa kwa infrared (FT-IR) kunawonetsa kuti ma nanoparticles adabalalika mofanana mu matrix. Malinga ndi kuyesa kwamakina, zidapezeka kuti polyurethane yosinthidwa ndi nanoparticles ili ndi mphamvu zamakomedwe apamwamba kuposa polyurethane yoyera.

Graphene
Graphene (G) ndi mawonekedwe osanjikiza omangika ndi ma orbitals osakanizidwa a SP2, omwe amawonetsa kusinthika kwabwino, kusinthasintha kwamafuta, komanso kukhazikika. Ili ndi mphamvu zambiri, yolimba bwino, komanso yosavuta kupindika. Wu et al. opangidwa ndi Ag/G/PU nanocomposites, ndipo pakuwonjezeka kwa Ag/G, kukhazikika kwamafuta ndi hydrophobicity ya zinthu zophatikizika kunapitilirabe, ndipo ntchito ya antibacterial idakulanso moyenera.

Carbon Nanotubes
Mpweya nanotubes (CNTs) ndi mbali imodzi ya tubular nanomaterials olumikizidwa ndi hexagon, ndipo panopa ndi chimodzi mwa zipangizo ndi osiyanasiyana ntchito. Pogwiritsa ntchito mphamvu zake zapamwamba, ma conductivity, ndi zinthu zopangidwa ndi polyurethane, kukhazikika kwamafuta, makina amakina, komanso kuwongolera kwazinthuzo kumatha kuwongolera. Wu et al. anayambitsa CNTs kudzera mu-situ polymerization kulamulira kukula ndi mapangidwe emulsion particles, kuwapangitsa CNTs kukhala uniformly omwazika mu polyurethane masanjidwewo. Ndi kuchuluka kwa CNTs, mphamvu yamakomedwe yazinthu zophatikizika zasinthidwa kwambiri.

Kampani yathu imapereka Fumed Silica yapamwamba kwambiri,Anti-hydrolysis Agents (ma crosslinking agents, Carbodiimide), UV absorbers, ndi zina, zomwe zimathandizira kwambiri ntchito ya polyurethane.