Iselulosi yeHydroxyethyl (HEC)i-derivative ye-cellulose e-soluble yamanzi kunye nokutyeba okulungileyo, ukwenza ifilimu, ukuthambisa, ukuzinzisa, kunye neempawu ze-emulsifying. Ke ngoko, isetyenziswa kakhulu kwiinkalo ezininzi zoshishino, ngakumbi Idlala indima ebaluleke kakhulu kunye nebalulekileyo kwipeyinti yelatex (eyaziwa ngokuba yipeyinti esekwe emanzini).
1. Iimpawu ezisisiseko ze-hydroxyethyl cellulose
I-Hydroxyethyl cellulose yimbumba yepolymer enyibilikayo emanzini efunyenwe ngokuguqula iimolekyuli zeselulosi (ukwazisa amaqela e-hydroxyethyl kwiimolekyuli ze-cellulose). Iimpawu zayo eziphambili ziquka:
Ukunyibilika kwamanzi: I-HEC inokunyibilika emanzini ukwenza isisombululo se-viscous esiphezulu, ngaloo ndlela iphucula iimpawu ze-rheological zokugqoka.
Ukuqina kwefuthe: I-HEC inokunyusa kakhulu i-viscosity yepeyinti, ukwenza ipeyinti ye-latex ibe neempawu ezintle zokugquma.
I-Adhesion kunye ne-film-forming properties: Ii-molecule ze-HEC zine-hydrophilicity ethile, enokuphucula ukusebenza kwe-coating of the coating and make the covering more uniform and smooth.
Ukuzinza: I-HEC inozinzo oluhle lwe-thermal kunye nokuzinza kweekhemikhali, inokuhlala izinzile ngexesha lokuvelisa kunye nokugcinwa kweengubo, kwaye ayifuni ukuthotywa.
Ukuchasana kakuhle kwe-sagging: I-HEC inokumelana okuphezulu kwe-sagging, enokunciphisa into ephazamisayo yepeyinti ngexesha lokwakha kunye nokuphucula umphumo wokwakha.
2. Indima ye-hydroxyethyl cellulose kwipeyinti ye-latex
Ipeyinti yeLatex yipeyinti esekwe emanzini esebenzisa amanzi njenge-solvent kunye ne-polymer emulsion njengeyona nto iphambili yokwenza ifilimu. Ihambelana nokusingqongileyo, ayinayo ityhefu, ayicaphukisi kwaye ifanelekile kwipeyinti yodonga lwangaphakathi nangaphandle. Ukongezwa kwe-hydroxyethyl cellulose kunokuphucula kakhulu ukusebenza kwepeyinti ye-latex, ebonakaliswa ngokukodwa kule miba ilandelayo:
2.1 Ukuqina kwesiphumo
Kwimiqulu yepeyinti ye-latex, i-HEC isetyenziswa kakhulu njenge-thickener. Ngenxa yeempawu ezinyibilikayo zamanzi ze-HEC, inokuchithwa ngokukhawuleza kwi-solvents enamanzi kwaye yenze isakhiwo senethiwekhi ngokusebenzisa i-intermolecular interactions, inyusa kakhulu i-viscosity yepeyinti ye-latex. Oku akunako nje ukuphucula ukusasazeka kwepeyinti, okwenza ukuba ifaneleke ngakumbi ukuxubha, kodwa iphinde ithintele ipeyinti ukuba ingabikho ngenxa ye-viscosity ephantsi kakhulu ngexesha lenkqubo yokupeyinta.
2.2 Ukuphucula ukusebenza kolwakhiwo lweengubo
I-HECinokulungelelanisa ngokufanelekileyo iimpawu ze-rheological zepeyinti ye-latex, iphucule ukuxhathisa kwe-sag kunye ne-fluidity yepeyinti, iqinisekise ukuba ipeyinti inokudityaniswa ngokulinganayo kumphezulu we-substrate, kwaye ugweme izinto ezingathandekiyo ezifana namaqamza kunye namanqaku okuhamba. Ukongeza, i-HEC inokuphucula ukumanzisa kwepeyinti, ivumela ipeyinti ye-latex ukuba igubungele ngokukhawuleza indawo xa ipeyinta, inciphisa iziphene ezibangelwa yi-coating engalinganiyo.
2.3 Ukwandisa ukugcinwa kwamanzi kunye nokwandisa ixesha lokuvula
Njengomxube wepolymer kunye nomthamo oqinileyo wokugcina amanzi, i-HEC inokwandisa ngokufanelekileyo ixesha lokuvulwa kwepeyinti ye-latex. Ixesha lokuvula libhekisela kwixesha apho upende luhlala luhlala kwindawo epeyintiweyo. Ukongezwa kwe-HEC kunokucothisa i-evaporation yamanzi, ngaloo ndlela kwandiswe ixesha elisebenzayo lepeyinti, ukuvumela abasebenzi bokwakha ukuba babe nexesha elingakumbi lokulungisa kunye nokugquma. Oku kubalulekile ekusebenziseni ipeyinti egudileyo, ngakumbi xa kupeyintwa iindawo ezinkulu, ukuthintela umphezulu wepeyinti ukuba wome ngokukhawuleza, okukhokelela kumanqaku ebrashi okanye ukugquma okungalinganiyo.
2.4 Ukuphucula ukunamathela kokutyabeka kunye nokumelana namanzi
Kwiipeyinti zepeyinti ye-latex, i-HEC inokunyusa ukunamathela phakathi kwepeyinti kunye nomgangatho we-substrate ukuqinisekisa ukuba i-coating ayiwi lula. Ngelo xesha, i-HEC iphucula ukusebenza kwamanzi kwepeyinti ye-latex, ngokukodwa kwiindawo ezinomswakama, ezinokuthintela ngokufanelekileyo ukungena komswakama kunye nokwandisa ubomi benkonzo yokugqoka. Ukongeza, i-hydrophilicity kunye nokunamathela kwe-HEC kwenza ipeyinti yelatex yenze iingubo ezilungileyo kwiintlobo ezahlukeneyo ze-substrates.
2.5 Ukuphucula ukuchasana kokuzinzisa kunye nokufana
Ekubeni amacandelo aqinileyo kwipeyinti ye-latex kulula ukuhlalisa, okubangelwa umgangatho ongalinganiyo wepeyinti, i-HEC, njenge-thickener, inokuphucula ngokufanelekileyo iimpawu zokuchasana nepeyinti. Ngokunyusa i-viscosity ye-coating, i-HEC yenza ukuba iinqununu eziqinileyo zihlakazeke ngokulinganayo kwi-coating, ukunciphisa ukuhlalisa i-particle, ngaloo ndlela kugcinwe ukuzinza kwengubo ngexesha lokugcinwa kunye nokusetyenziswa.
3. Izibonelelo zokusetyenziswa kwe-hydroxyethyl cellulose kwipende ye-latex
Ukongezwa kwe-cellulose ye-hydroxyethyl kunenzuzo ebalulekileyo kwimveliso kunye nokusetyenziswa kwepeyinti ye-latex. Okokuqala, i-HEC ineempawu ezilungileyo zokusingqongileyo. Ukunyibilika kwayo kwamanzi kunye ne-non-toxicity iqinisekisa ukuba ipeyinti ye-latex ayiyi kukhulula izinto ezinobungozi ngexesha lokusetyenziswa, ukuhlangabezana neemfuno zeepeyinti zanamhlanje ezihambelana nokusingqongileyo. Okwesibini, i-HEC ineepropati eziqinileyo zokwenza ifilimu, ezinokuphucula umgangatho wefilimu wepeyinti ye-latex, okwenza i-coating ibe nzima kwaye ilula, kunye nokuqina okungcono kunye nokuchasana nokungcola. Ukongeza, i-HEC inokuphucula umbane kunye nokusebenza kwepeyinti ye-latex, ukunciphisa ubunzima bokwakha, kunye nokuphucula ukusebenza kakuhle.
Ukusetyenziswa kwei-hydroxyethyl cellulosekwipeyinti ye-latex ineenzuzo ezininzi kwaye inokuphucula ngokufanelekileyo iimpawu ze-rheological, ukusebenza kokwakhiwa, ukunamathela kunye nokuqina kwepeyinti. Ngokuphuculwa okuqhubekayo kokhuseleko lokusingqongileyo kunye neemfuno zomgangatho wepeyinti, i-HEC, njengento ebalulekileyo yokuqinisa kunye nokuphucula ukusebenza, iye yaba yenye yezongezo eziyimfuneko kwiipende zanamhlanje zelatex. Kwixesha elizayo, ngophuhliso lobuchwepheshe, ukusetyenziswa kwe-HEC kwipeyinti ye-latex kuya kwandiswa ngakumbi kwaye amandla ayo aya kuba mkhulu.
Ixesha lokuposa: Nov-14-2024