I-Hydroxyethyl Cellulose (HEC) yinto ebalulekileyo yamanzi e-soluble nonionic cellulose ether, esetyenziswa ngokubanzi kwiingubo zezakhiwo, ngakumbi iipeyinti ze-latex. Njenge-thickener esebenzayo, i-colloid ekhuselayo, i-agent yokumisa kunye ne-film-forming aid, iphucula kakhulu ukusebenza kwepeyinti ye-latex, iphucula iimpawu zokwakhiwa kwepeyinti kunye nefuthe elibonakalayo lomkhiqizo ogqityiweyo.
1. Ukwakhiwa kweekhemikhali kunye neempawu ze-hydroxyethyl cellulose
I-Hydroxyethyl cellulose yi-cellulose ephuma kwi-cellulose eveliswa ngokuzisa iqela le-hydroxyethyl kwi-molecule ye-cellulose. Yikhompawundi yepolymer enyibilikayo emanzini. Ubume bayo beekhemikhali bumisela ukunyibilika kwayo okugqwesileyo kwamanzi kunye neempawu ezityebileyo. Xa inyibilika emanzini, inokwenza isisombululo esiphezulu se-viscous kunye ne-adhesion elungileyo, ifilimu-ifom kunye nemiphumo yokuqina. Ezi zakhiwo zidlala indima ephambili kwiipende zelatex.
I-Hydroxyethyl cellulose idla ngokuba ngumgubo omhlophe okanye okhanyayo otyheli okanye iigranules, ezinyibilika ngokulula kumanzi abandayo okanye ashushu ukwenza isisombululo esizinzileyo se-colloidal. Isisombululo saso sinozinzo oluphezulu kwaye sinokuxhathisa ngokufanelekileyo i-asidi, i-alkali, i-redox kunye ne-microbial degradation. Ukongeza, ngenxa yobume be-non-ionic ye-hydroxyethyl cellulose, ayisebenzi ngokwekhemikhali kunye nezinye izithako kwiipeyinti ze-latex ezifana ne-pigment, izihlungi okanye izongezo, ngoko ke inokuhambelana okubanzi kwimiqulu yepeyinti ye-latex.
2. Indlela yokusebenza ye-hydroxyethyl cellulose kwipende ye-latex
Kwipeyinti ye-latex, indima ye-hydroxyethyl cellulose ibonakaliswa ikakhulu kukuqina, ukugcinwa kwamanzi, ukuzinza okuphuculweyo kunye nokusebenza okuphuculweyo:
Isiphumo sokuqina: I-Hydroxyethyl cellulose, njenge-thickener esebenzayo, inokunyusa i-viscosity yepeyinti ye-latex kwaye yandise i-thixotropy yayo. Oku akuthinteli kuphela ngokufanelekileyo ukuba ipeyinti ingabikho ngexesha lokugcina kunye nesicelo, kodwa yenza ipeyinti ngakumbi naxa iqengqeleke okanye ixutywe. Isiphumo esifanelekileyo sokuqina sinceda ukulawula i-rheology yepeyinti ye-latex, iqinisekisa ukuvakalelwa kakuhle xa ufaka isicelo, kwaye uphucula ukugubungela ifilimu.
Ukugcinwa kwamanzi: I-Hydroxyethyl cellulose inokugcinwa kakuhle kwamanzi. Ngexesha lenkqubo yokomisa ipeyinti ye-latex, inokuthintela amanzi ukuba aphume ngokukhawuleza ngokukhawuleza, ngaloo ndlela akhulise ixesha lokuvula elimanzi lepeyinti kunye nokuqinisekisa ukwakhiwa okugudileyo. Ukongeza, ukugcinwa kakuhle kwamanzi kunokunciphisa ukukrazula kwefilimu yokugubungela emva kokumisa, ngaloo ndlela kuphuculwe umgangatho opheleleyo wefilimu yokugubungela.
Ukuzinza: I-Hydroxyethyl cellulose, njenge-colloid ekhuselayo, inokuthintela ngokufanelekileyo ii-pigments kunye nezizalisi ukuba zingahlali kwipeyinti ye-latex. Iyakwazi ukwenza inkqubo ye-colloidal ezinzileyo ngokusebenzisa isisombululo sayo se-viscous ukusabalalisa ngokulinganayo inxalenye nganye kunye nokuqinisekisa ukuzinza kokugcinwa kwepeyinti. Ngelo xesha, i-hydroxyethyl cellulose inokuphucula ukuzinza kwee-emulsion particles kwaye igweme i-delamination kunye ne-agglomeration yenkqubo ye-latex ngexesha lokugcinwa.
Ukwakhiwa: Ngexesha lenkqubo yokwakha, ukutyeba kunye nefuthe le-lubricating ye-hydroxyethyl cellulose yenza ipeyinti ye-latex ibe neepropati ezintle zokugquma kunye nokulinganisa, ezinokunciphisa ngokufanelekileyo amanqaku ebrashi kunye nokuphucula ukugudiswa kwefilimu yokugqoka. Ukongeza, ngenxa yokuba i-hydroxyethyl cellulose inokuphucula i-thixotropy yepeyinti, ipeyinti ye-latex kulula ukuyisebenzisa ngexesha lenkqubo yokupeyinta, ine-fluidity entle ngaphandle kokuthontsiza, kwaye ilungele iindlela ezahlukeneyo zokwakha, njengokuxubha, i-roller coating kunye nokutshiza. .
3. Iziphumo ezichanekileyo zokusetyenziswa kwe-hydroxyethyl cellulose kwipende ye-latex
Ukuphucula ukugcinwa kozinzo lwepeyinti: Ukongeza ubungakanani obufanelekileyo be-hydroxyethyl cellulose kwifomula yepeyinti ye-latex inokuphucula kakhulu iipropathi ezichasayo zepeyinti kwaye uthintele ukubekwa kwemibala kunye nezihluzi. Ukusasazwa kwe-hydroxyethyl cellulose kwiingubo kunokugcina ukufana kwenkqubo yokugqoka kunye nokwandisa ixesha lokugcinwa kwemveliso.
Ukuphucula iimpawu ze-rheological zokugquma: Iimpawu ze-rheological zeepeyinti ze-latex zibaluleke kakhulu kumgangatho wokwakha. I-Hydroxyethyl cellulose inokusebenzisa i-thixotropy yayo ekhethekileyo ukwenza ipeyinti ihambe ngokulula phantsi kwamandla aphezulu okucheba (njengaxa upeyinta), kwaye ugcine i-viscosity ephezulu phantsi kwe-low shear force (efana nokuma), ukuthintela i-Sag. Olu phawu lwenza ipeyinti yelatex ibe neziphumo ezingcono zokwakha kunye neziphumo zokwambathisa, ukunciphisa ukuthoba kunye namanqaku okuqengqeleka.
Ukuphucula umphumo obonakalayo kunye neempawu ezibonakalayo zefilimu yokugqoka: I-Hydroxyethyl cellulose idlala indima ebalulekileyo kwinkqubo yokwenziwa kwefilimu. Ayinakuphucula kuphela ukugudiswa kwefilimu yepeyinti, kodwa iphinde ikhulise ukunyanzeliswa kokugqoka kunye nokuxhatshazwa kwamanzi kwifilimu yepeyinti, ukwandisa ubomi benkonzo yefilimu yepeyinti. Ukongezelela, ngenxa yokugcinwa kwamanzi kakuhle, i-coating yomile ngokulinganayo, inceda ukuphepha iingxaki ezifana nemibimbi, i-pinholes kunye nokuqhekeka, okwenza umphezulu wengubo ube lula.
Ukuphuculwa kokusebenza kokusingqongileyo: I-Hydroxyethyl cellulose iphuma kwi-cellulose yendalo, inokonakala okugqwesileyo kwe-biodegradability, kwaye ayiyi kungcolisa okusingqongileyo. Xa kuthelekiswa ne-thickeners yemveli eyenziweyo, ihambelana nokusingqongileyo kwaye ihlangabezana neemfuno zezinto zokwakha eziluhlaza. Ukongezelela, ayinayo i-volatile organic compounds (VOC), ngoko ukusebenzisa i-hydroxyethyl cellulose kwipeyinti ye-latex inceda ukunciphisa ukukhutshwa kwe-VOC kunye nokuphucula umgangatho womoya wendawo yokwakha.
Njengesongezo esibalulekileyo kwipeyinti ye-latex, i-hydroxyethyl cellulose inokuphucula kakhulu ukusebenza kolwakhiwo kunye nomphumo wokugqibela wokugquma wepeyinti ye-latex ngokuqina kwayo okugqwesileyo, ukugcinwa kwamanzi, ukuzinza kunye neempawu zokwenza ifilimu. Ngelo xesha, ngenxa yokukhusela okusingqongileyo kunye neempawu eziphantsi ze-VOC, i-hydroxyethyl cellulose ihlangabezana neemfuno eziluhlaza kunye nokusingqongileyo kwishishini leengubo zanamhlanje. Ngokuqhubela phambili okuqhubekayo kobuchwepheshe, amathuba okusetyenziswa kwe-hydroxyethyl cellulose kwipeyinti ye-latex iya kuba banzi, ibonelele ngezisombululo ezingcono zophuhliso oluzinzileyo loshishino lokwaleka kwezakhiwo.
Ixesha lokuposa: Sep-20-2024