Xyoo 2025, kev lag luam txheej txheej tab tom ua kom nrawm nrawm mus rau ob lub hom phiaj ntawm "kev hloov pauv ntsuab" thiab "kev txhim kho kev ua tau zoo." Hauv cov teb txheej txheej siab xws li tsheb thiab kev thauj mus los ntawm tsheb ciav hlau, cov txheej txheej dej tau hloov zuj zus los ntawm "lwm txoj kev xaiv" mus rau "kev xaiv tseem ceeb" ua tsaug rau lawv cov pa phem VOC tsawg, kev nyab xeeb, thiab tsis muaj tshuaj lom. Txawm li cas los xij, kom ua tau raws li qhov xav tau ntawm cov xwm txheej siv hnyav (piv txwv li, av noo siab thiab xeb muaj zog) thiab cov neeg siv cov kev xav tau siab dua rau kev ruaj khov thiab kev ua haujlwm ntawm cov txheej txheej, kev tshawb fawb txog thev naus laus zis hauv cov txheej txheej polyurethane (WPU) dej txuas ntxiv mus. Xyoo 2025, kev tsim kho tshiab hauv kev lag luam hauv kev ua kom zoo dua ntawm cov mis, kev hloov kho tshuaj, thiab kev tsim qauv ua haujlwm tau txhaj tshuaj tshiab rau hauv qhov kev lag luam no.
Kev Txhim Kho Lub Txheej Txheem Tseem Ceeb: Los ntawm "Kev Kho Qhov Sib Piv" mus rau "Kev Sib Npaug ntawm Kev Ua Haujlwm"
Ua tus "ua tau zoo tshaj plaws" ntawm cov txheej txheem dej tam sim no, ob-component waterborne polyurethane (WB 2K-PUR) ntsib teeb meem tseem ceeb: kev sib npaug ntawm qhov sib piv thiab kev ua tau zoo ntawm cov kab ke polyol. Xyoo no, cov pab pawg tshawb fawb tau ua kev tshawb nrhiav tob tob rau hauv cov teebmeem synergistic ntawm polyether polyol (PTMEG) thiab polyester polyol (P1012).
Ib txwm muaj, polyester polyol ua rau lub zog thiab qhov ceev ntawm cov txheej txheej ua rau lub zog thiab qhov ceev ntawm cov txheej vim muaj cov hydrogen bonds sib xyaw ua ke, tab sis kev ntxiv ntau dhau ua rau cov dej tsis kam vim muaj cov hydrophilicity ntawm cov pab pawg ester. Cov kev sim tau lees paub tias thaum P1012 suav txog 40% (g/g) ntawm lub kaw lus polyol, "kev sib npaug kub" tau ua tiav: cov hydrogen bonds ua rau lub cev sib txuas ceev tsis muaj hydrophilicity ntau dhau, ua kom zoo dua qhov kev ua tau zoo ntawm cov txheej txheej - suav nrog kev tiv thaiv ntsev tsuag, kev tiv thaiv dej, thiab lub zog tensile. Cov lus xaus no muab cov lus qhia meej rau WB 2K-PUR cov qauv yooj yim, tshwj xeeb tshaj yog rau cov xwm txheej zoo li lub tsheb chassis thiab cov tsheb ciav hlau uas xav tau ob qho tib si kev ua tau zoo thiab kev tiv thaiv corrosion.
"Kev Sib Xyaws Ua Ke Rigidity thiab Flexibility": Kev Hloov Kho Tshuaj Qhib Cov Ciam Teb Tshiab
Txawm hais tias kev ua kom zoo dua qhov sib piv yooj yim yog "kev hloov kho me me," kev hloov pauv tshuaj lom neeg sawv cev rau "kev dhia zoo" rau polyurethane dej. Ob txoj kev hloov pauv tau sawv cev rau xyoo no:
Txoj Kev 1: Kev Txhim Kho Synergistic nrog Polysiloxane thiab Terpene Derivatives
Kev sib xyaw ua ke ntawm cov polysiloxane uas muaj zog tsawg (PMMS) thiab cov hydrophobic terpene derivatives ua rau WPU muaj ob yam khoom ntawm "superhydrophobicity + high rigidity." Cov kws tshawb fawb tau npaj hydroxyl-terminated polysiloxane (PMMS) siv 3-mercaptopropylmethyldimethoxysilane thiab octamethylcyclotetrasiloxane, tom qab ntawd grafted isobornyl acrylate (ib qho derivative ntawm biomass-derived camphene) rau ntawm PMMS sab saw hlau ntawm UV-pib thiol-ene click reaction los tsim terpene-based polysiloxane (PMMS-I).
Lub WPU uas tau hloov kho tau pom tias muaj kev txhim kho zoo kawg nkaus: lub kaum sab xis ntawm kev sib cuag dej uas tsis hloov pauv tau dhia los ntawm 70.7° mus rau 101.2° (mus txog qhov zoo li nplooj lotus superhydrophobicity), kev nqus dej tau poob qis los ntawm 16.0% mus rau 6.9%, thiab lub zog tensile tau nce los ntawm 4.70MPa mus rau 8.82MPa vim yog lub nplhaib terpene uas ruaj khov. Kev tshuaj xyuas Thermogravimetric kuj tau qhia txog kev ruaj khov thermal zoo dua. Cov thev naus laus zis no muab kev daws teeb meem "tiv thaiv kev ua qias tuaj + tiv taus huab cua" rau cov khoom siv sab nraud ntawm kev thauj mus los ntawm tsheb ciav hlau xws li cov vaj huam sib luag ntawm lub ru tsev thiab cov tiab sab.
Txoj Kev 2: Polyimine Crosslinking Ua Rau "Kev Kho Tus Kheej" Technology
Kev kho tus kheej tau tshwm sim los ua ib qho thev naus laus zis nrov hauv kev pleev xim, thiab xyoo no kev tshawb fawb tau muab nws ua ke nrog WPU qhov kev ua tau zoo ntawm lub tshuab kom ua tiav ob qho kev tshawb pom hauv "kev ua tau zoo + kev kho tus kheej." Crosslinked WPU npaj nrog polybutylene glycol (PTMG), isophorone diisocyanate (IPDI), thiab polyimine (PEI) ua crosslinker tau pom cov khoom siv kho tshuab zoo kawg nkaus: lub zog tensile ntawm 17.12MPa thiab elongation thaum tawg ntawm 512.25% (ze rau roj hmab yooj ywm).
Qhov tseem ceeb tshaj plaws, nws kho tau nws tus kheej tag nrho hauv 24 teev ntawm 30°C—rov qab mus txog 3.26MPa lub zog tensile thiab 450.94% elongation tom qab kho. Qhov no ua rau nws tsim nyog heev rau cov khoom uas yooj yim khawb xws li lub bumpers tsheb thiab sab hauv tsheb ciav hlau, txo cov nqi kho.
"Nanoscale Intelligent Control": Ib qho "Kev Hloov Pauv Nto" rau Cov Txheej Txheem Tiv Thaiv Fouling
Cov tshuaj pleev xim zoo nkauj uas tiv thaiv kev kos duab thiab yooj yim ntxuav yog qhov xav tau tseem ceeb. Xyoo no, ib txheej pleev xim uas tiv taus kev ua qias tuaj (NP-GLIDE) raws li "cov nanopools zoo li kua PDMS" tau nyiam mloog. Nws lub hauv paus ntsiab lus tseem ceeb yog kev txuas polydimethylsiloxane (PDMS) cov saw hlau rau ntawm cov polyol uas tawg tau dej los ntawm cov polyol copolymer polyol-g-PDMS, tsim cov "nanopools" me dua 30nm hauv txoj kab uas hla.
Kev nplua nuj PDMS hauv cov nanopools no ua rau cov txheej txheej zoo li "kua" - txhua cov kua kuaj nrog qhov nro ntawm qhov chaw siab tshaj 23mN / m (piv txwv li, kas fes, roj av) swb tawm yam tsis tawm cov cim. Txawm hais tias qhov nyuaj ntawm 3H (ze rau iav ib txwm), cov txheej txheej tseem muaj kev ua tau zoo tiv thaiv kev ua qias tuaj.
Tsis tas li ntawd xwb, tau muaj ib txoj kev tiv thaiv "physical barrier + mild cleaning" anti-graffiti: qhia txog IPDI trimer rau hauv HDT-based polyisocyanate los txhim kho qhov ceev ntawm zaj duab xis thiab tiv thaiv kev nkag mus ntawm graffiti, thaum tswj kev tsiv teb tsaws chaw ntawm silicone/fluorine segments kom ntseeg tau tias lub zog ntawm qhov chaw qis ntev. Ua ke nrog DMA (Dynamic Mechanical Analysis) rau kev tswj hwm qhov ceev ntawm crosslink thiab XPS (X-ray Photoelectron Spectroscopy) rau kev piav qhia txog kev tsiv teb tsaws chaw, cov thev naus laus zis no tau npaj rau kev lag luam thiab xav tias yuav dhau los ua tus qauv tshiab rau kev tiv thaiv kev ua qias tuaj hauv cov xim pleev xim tsheb thiab cov khoom lag luam 3C.
Xaus lus
Xyoo 2025, WPU txheej txheem thev naus laus zis tab tom hloov ntawm "kev txhim kho ib qho kev ua tau zoo" mus rau "kev koom ua ke ntau yam." Txawm hais tias los ntawm kev ua kom zoo dua qub, kev hloov kho tshuaj lom neeg, lossis kev tsim kho tshiab, lub hauv paus ntsiab lus tig mus rau kev sib koom ua ke "kev phooj ywg ib puag ncig" thiab "kev ua tau zoo siab." Rau cov lag luam xws li tsheb thiab kev thauj mus los ntawm tsheb ciav hlau, cov kev nce qib thev naus laus zis no tsis yog tsuas yog txuas ntxiv lub neej ntawm txheej txheem thiab txo cov nqi kho xwb tab sis kuj tseem tsav tsheb ob qho kev txhim kho hauv "kev tsim khoom ntsuab" thiab "kev paub siv siab."
Lub sijhawm tshaj tawm: Kaum Ib Hlis-14-2025