Iingubo zokugquma emanzini zisiya zibaluleke kakhulu kwimarike yokwambathisa yale mihla ngenxa yeepropathi zazo zokusingqongileyo kunye nokukhutshwa okuphantsi kwe-volatile organic compound (VOC). Nangona kunjalo, xa kuthelekiswa neengubo zemveli ezisekelwe kwi-solvent, iingubo zamanzi zihlala zijongene nemingeni malunga nokwenziwa kwefilimu kunye nokubambelela. Ukujongana nale miba, ezinye izongezo ezisebenzayo zihlala zongezwa kuyilo. I-Hydroxyethyl cellulose (HEC) yenye yee-thickeners ezisetyenziswa ngokubanzi kunye nezongezo ezisebenzayo, ezidlala indima ebalulekileyo ekuphuculeni ukubunjwa kwefilimu kunye nokubambelela kwiingubo zamanzi.
1. Iimpawu ezisisiseko ze-hydroxyethyl cellulose (HEC)
I-HEC i-polymer engekho i-ionic yamanzi e-soluble efunyenwe ngokuguqulwa kweekhemikhali ze-cellulose yendalo. Isakhiwo sayo se-molecular iqulethe inani elikhulu lamaqela e-hydroxyethyl, okwenza kube ne-solubility efanelekileyo yamanzi kunye neepropati zokwenza ifilimu. Iimpawu eziphambili zeHEC ziquka:
Impembelelo yokutyebisa: I-HEC inokunyusa ngokufanelekileyo i-viscosity yeengubo zamanzi, ibanika i-rheology engcono kunye nokuzinza ngexesha lokugqoka.
Ipropathi yokwenza ifilimu: I-HEC inokwenza ifilimu efanayo ngexesha lokumisa inkqubo yokugubungela, ukuphucula iimpawu ezibonakalayo zokugqoka.
Ukuhambelana: I-HEC inokuhambelana kakuhle kunye neentlobo ezahlukeneyo ze-resin ezisekelwe emanzini kunye ne-pigment, kwaye ayifuni ukungazinzi kwefomula okanye i-stratification.
2. I-Mechanism ye-HEC ekuphuculeni iipropati zokwenza ifilimu kwiingubo ezisekelwe emanzini
I-HEC inokuphucula kakhulu iipropati zokwenza ifilimu kwiingubo ezisekelwe emanzini, ngokukodwa ngenxa yesakhiwo sayo esisodwa se-molecular kunye neempawu ezibonakalayo kunye neekhemikhali.
I-Physical cross-linking of molecular chain chain: I-HEC i-molecular chain inde kwaye iguquguqukayo. Ngethuba lokumisa inkqubo yokugquma, la matyathanga eemolekyuli anokuthi adibanise omnye nomnye ukuze enze inethiwekhi yokudibanisa ngokomzimba, ukwandisa amandla omatshini kunye nokuguquguquka kwengubo.
Ukulawulwa komswakama: I-HEC inokugcinwa kakuhle kwamanzi kwaye inokukhupha ngokukhawuleza umswakama ngexesha lokumisa umswakama, ukwandisa ixesha lokubumba ifilimu, ukuvumela ukuba i-coating yenziwe ngokulinganayo, kunye nokunciphisa ukuqhekeka kunye nokunciphisa okubangelwa ukukhawuleza kokumisa ngokukhawuleza.
Ukulawulwa koxinzelelo lomphezulu: I-HEC inokunciphisa ngokufanelekileyo ukunyanzeliswa komphezulu wokugquma kwamanzi, ukukhuthaza ukumanzisa kunye nokusabalalisa kweengubo ebusweni be-substrate, kunye nokuphucula ukufana kunye nokunyanzeliswa kwengubo.
3. I-Mechanism ye-HEC ekuphuculeni ukubambelela kwiingubo ezisekelwe emanzini
I-HEC inokuphucula ngokuphawulekayo ukubambelela kweengubo ezisekelwe emanzini, ezibonakaliswa ngokukodwa kule miba ilandelayo:
Ukuphuculwa kwe-Interface: Ukuhanjiswa okufanayo kwe-HEC kwi-coating kunokunyusa indawo yoqhagamshelwano phakathi kwengubo kunye ne-substrate surface kunye nokuphucula amandla okudibanisa okuhlangeneyo. Ikhonkco layo le-molekyuli linokuthi lidibanise kunye ne-concave encinci kunye neendawo ze-convex ze-substrate surface ukuphucula ukunamathela komzimba.
Ukuhambelana kweMichiza: I-HEC i-polymer engeyiyo i-ionic enokuhambelana kakuhle kweekhemikhali kunye neentlobo ze-substrates (ezifana nesinyithi, ukhuni, iplastiki, njl.), kwaye akulula ukubangela ukuphendulwa kweekhemikhali okanye iingxaki zokuhambelana kwe-interfacial, ngaloo ndlela kuphuculwe ukunamathela.
Impembelelo yePlastiki: I-HEC inokudlala indima ethile yeplastikhi kwinkqubo yokomisa yokwaleka, ukwenza i-coating ibe bhetyebhetye ngakumbi, ukuze ikwazi ukuziqhelanisa ngcono ne-deformation encinci kunye nokwandiswa kwe-thermal kunye nokucutheka komphezulu we-substrate, kunye nokunciphisa ukuxobuka kunye nokuqhekeka. yokwaleka.
4. Imizekelo yesicelo kunye neziphumo zeHEC
Kwizicelo ezisebenzayo, i-HEC isetyenziswa ngokubanzi kwiindidi ezahlukahlukeneyo zokuqulunqwa kwamanzi asekelwe kumanzi, njengamanzi e-architectural architectural coatings, i-water-based-wood coatings, i-industry-based-industry-based-industry-based-industry-based, njl. ukusebenza kwengubo kunye nomgangatho wefilimu yokugqibela yokugqoka inokuphuculwa kakhulu.
Iingubo zezakhiwo ezisekelwe emanzini: Kwiipeyinti zodonga olusekelwe emanzini kunye nepeyinti yodonga lwangaphandle, ukongeza i-HEC inokuphucula ngokufanelekileyo i-coating's rolling and brushing performance, okwenza ukuba kube lula ukusebenzisa i-coating kunye nefilimu yokugqoka ifanayo kwaye igudileyo. Ngexesha elifanayo, ukugcinwa kwamanzi kwe-HEC kunokuthintela ukuqhekeka kwifilimu yokugqoka ebangelwa ukomisa ngokukhawuleza.
Ipeyinti yomthi esekelwe ngamanzi: Kwipeyinti yokhuni esekelwe emanzini, i-HEC yokuqina kunye neempawu zokwenza ifilimu inceda ukuphucula ukucaca kunye nokunyanzeliswa kwefilimu yepeyinti, okwenza umphezulu womthi ube mhle kwaye ungokwemvelo. Ukongezelela, i-HEC inokunyusa ukunyanzeliswa kwamanzi kunye nokuchasana kweekhemikhali zefilimu yokugqoka kunye nokuphucula umphumo wokukhusela wokhuni.
Ukufakwa kwemveliso yamanzi: Kwimibhobho yensimbi esekelwe emanzini kunye ne-anti-corrosion, i-HEC yokuphucula i-adhesion ivumela ukuba ifilimu yokugqoka ihambelane kakuhle nentsimbi, ukuphucula ukusebenza kwe-anti-corrosion kunye nobomi benkonzo.
Njengesongezo esibalulekileyo esisebenzayo, i-hydroxyethyl cellulose (HEC) iphucula kakhulu ukusebenza ngokubanzi kwengubo kwiingubo ezisekelwe emanzini ngokuphucula iipropati zokwenza ifilimu kunye nokubambelela. Ukuqina kwayo, ukugcinwa kwamanzi, ukwenza ifilim kunye neziphumo zokuphucula ujongano kwenza ukuba i-coatings esekwe emanzini isebenze kakuhle kwiimeko ezahlukeneyo zesicelo, ngaloo ndlela ihlangabezana nemfuno yentengiso yokusebenza okuphezulu, ukugquma kokusingqongileyo. Kwixesha elizayo, kunye nokuphuculwa okuqhubekayo kokukhuselwa kwendalo kunye neemfuno zokusebenza, ithemba lesicelo se-HEC kwiingubo ezisekelwe emanzini ziya kuba zibanzi.
Ixesha lokuposa: Jul-12-2024