Kwimixube yepeyinti, i-hydroxyethyl cellulose (HEC) sisiguquli esiqhelekileyo sokutyebisa kunye ne-rheology esinokuphucula uzinzo lokugcina, ukulingana kunye neempawu zokwakha zepeyinti. Ukuze kongezwe i-hydroxyethyl cellulose kwiipeyinti kwaye kuqinisekiswe ukuba isebenza kakuhle, kufuneka kulandelwe amanyathelo athile kunye nokhuseleko. Inkqubo ethile yile ilandelayo:
1. Iimpawu ze-hydroxyethyl cellulose
I-Hydroxyethyl cellulose yi-polymer engeyiyo i-ionic enyibilikayo emanzini eneempawu ezibalaseleyo zokutyeba, ukwenza ifilimu, ukugcina amanzi, ukumiswa kunye nokuxubha. Isetyenziswa kakhulu kwiipeyinti ezisekelwe emanzini, izincamathelisi, iiseramikhi, ii-inki kunye nezinye iimveliso. Ifunyanwa ngokutshintsha inxalenye yamaqela e-hydroxyl kwi-cellulose molecular chain ngamaqela e-hydroxyethyl, ngoko ke inokunyibilika kakuhle kwamanzi.
Imisebenzi ephambili ye-HEC kwiipeyinti zezi:
Isiphumo sokutyeba: Yandisa uburhabaxa bepeyinti, thintela ukuba ipeyinti ingatyibiliki, kwaye yenze ibe neempawu ezintle zokwakha.
Isiphumo sokumiswa: Ingasasazeka ngokulinganayo kwaye izinzise amasuntswana aqinileyo afana neepigment kunye nezizalisi ukuze zingahlali.
Isiphumo sokugcina amanzi: Ukuphucula ukugcinwa kwamanzi kwefilimu yokugquma, ukwandisa ixesha lokuvula, kunye nokuphucula isiphumo sokumanzisa kwepeyinti.
Ulawulo lwe-Rheology: lungisa ukutyibilika kunye nokulingana kwengubo, kwaye uphucule ingxaki yophawu lwebhrashi ngexesha lokwakha.
2. Amanyathelo okongeza i-hydroxyethyl cellulose
Inyathelo langaphambi kokunyibilika. Xa isebenza ngokwenene, i-hydroxyethyl cellulose kufuneka isasazwe ngokulinganayo kwaye ichithwe ngenkqubo yangaphambi kokunyibilika. Ukuqinisekisa ukuba i-cellulose inokudlala indima yayo ngokupheleleyo, kudla ngokucetyiswa ukuba uyinyibilikise emanzini kuqala, endaweni yokuyongeza ngqo kwi-coating. Amanyathelo athile ngala alandelayo:
Khetha isinyibilikisi esifanelekileyo: ngokuqhelekileyo kusetyenziswa amanzi angena-ion njengesinyibilikisi. Ukuba kukho ezinye izinyibilikisi ze-organic kwinkqubo yokugquma, iimeko zokunyibilika kufuneka zilungiswe ngokweempawu zesinyibilikisi.
Fafaza kancinci i-hydroxyethyl cellulose: Fafaza kancinci nangokulinganayo i-hydroxyethyl cellulose powder ngelixa uxuba amanzi ukuze uthintele ukuhlangana. Isantya sokuxuba kufuneka sicothe ukuze uphephe ukucothisa izinga lokunyibilika kwe-cellulose okanye ukwenza "ii-colloids" ngenxa yamandla okushefa amaninzi.
Ukunyibilika okumiyo: Emva kokutshiza i-hydroxyethyl cellulose, kufuneka ishiywe ime ixesha elithile (ngesiqhelo imizuzu engama-30 ukuya kwiiyure ezininzi) ukuqinisekisa ukuba i-cellulose idumbile ngokupheleleyo kwaye inyibilike emanzini. Ixesha lokunyibilika lixhomekeke kuhlobo lwe-cellulose, ubushushu be-solvent kunye neemeko zokuxukuxa.
Lungisa ubushushu bokunyibilika: Ukunyusa ubushushu kunceda ukukhawulezisa inkqubo yokunyibilika kwe-hydroxyethyl cellulose. Ngokuqhelekileyo kucetyiswa ukuba kulawulwe ubushushu besisombululo phakathi kwama-20℃ -40℃. Ubushushu obuphezulu kakhulu bunokubangela ukuwohloka kwe-cellulose okanye ukuwohloka kwesisombululo.
Ukulungisa ixabiso le-pH yesisombululo Ukunyibilika kwe-hydroxyethyl cellulose kunxulumene kakhulu nexabiso le-pH yesisombululo. Ihlala inyibilika ngcono phantsi kweemeko ezingathathi cala okanye ze-alkaline kancinci, kunye nexabiso le-pH phakathi kwe-6-8. Ngexesha lenkqubo yokunyibilika, ixabiso le-pH linokulungiswa ngokongeza i-ammonia okanye ezinye izinto ze-alkaline njengoko kufuneka.
Ukongeza isisombululo se-hydroxyethyl cellulose kwinkqubo yokugquma Emva kokunyibilika, yongeza isisombululo kwingubo yokugquma. Ngexesha lenkqubo yokongeza, kufuneka yongezwe kancinci kwaye ixutywe rhoqo ukuqinisekisa ukuxubana okwaneleyo ne-matrix yokugquma. Ngexesha lenkqubo yokuxuba, kuyimfuneko ukukhetha isantya sokuxuma esifanelekileyo ngokweenkqubo ezahlukeneyo ukuthintela inkqubo ekuqhekekeni kwe-foam okanye i-cellulose ngenxa yamandla okushefa amaninzi.
Ukulungisa i-viscosity Emva kokongeza i-hydroxyethyl cellulose, i-viscosity ye-coating inokulawulwa ngokulungelelanisa ubungakanani obongeziweyo. Ngokubanzi, ubungakanani be-hydroxyethyl cellulose esetyenzisiweyo buphakathi kwe-0.3%-1.0% (xa kuthelekiswa nobunzima obupheleleyo be-coating), kwaye ubungakanani obuthile obongeziweyo kufuneka bulungiswe ngokweemfuno ze-formulation ye-coating. Ubungakanani obuphezulu kakhulu bokongeza bunokubangela ukuba i-coating ibe ne-viscosity ephezulu kakhulu kunye nokungaguquguquki kakuhle, okuchaphazela ukusebenza kolwakhiwo; ngelixa ukongeza okunganelanga kusenokungakwazi ukudlala indima yokuqina kunye nokumiswa.
Yenza uvavanyo lokulinganisa kunye nozinzo lokugcina. Emva kokongeza i-hydroxyethyl cellulose kunye nokulungisa ifomyula yokugquma, ukusebenza kolwakhiwo lwe-coating kufuneka kuvavanywe, kubandakanya ukulinganisa, ukugoba, ulawulo lwe-brush mark, njl. Kwangaxeshanye, uvavanyo lozinzo lokugcina i-coating lukwafuneka ukuze kujongwe ukugalelwa kwe-coating emva kokuma ixesha elithile, utshintsho lwe-viscosity, njl. njl., ukuvavanya uzinzo lwe-hydroxyethyl cellulose.
3. Amanyathelo okuzikhusela
Nqanda ukuhlangana: Ngexesha lenkqubo yokunyibilika, i-hydroxyethyl cellulose kulula kakhulu ukuyifunxa amanzi nokudumba, ngoko ke kufuneka ifafazwe emanzini kancinci kwaye iqinisekise ukuxutywa okwaneleyo ukuthintela ukwakheka kwamaqhuma. Eli likhonkco eliphambili ekusebenzeni, kungenjalo linokuchaphazela izinga lokunyibilika kunye nokufana.
Kuphephe amandla aphezulu okucheba: Xa ufaka i-cellulose, isantya sokuxukuxa akufuneki sibe phezulu kakhulu ukuze kuthintelwe ukonakala kwe-cellulose molecular chain ngenxa yamandla amaninzi okucheba, nto leyo ebangela ukwehla kokusebenza kwayo kokujiya. Ukongeza, kwimveliso elandelayo yokugquma, ukusetyenziswa kwezixhobo ezikumgangatho ophezulu wokucheba kufuneka kuthintelwe kangangoko kunokwenzeka.
Lawula ubushushu bokunyibilika: Xa kunyibilika i-hydroxyethyl cellulose, ubushushu bamanzi akufuneki bube phezulu kakhulu. Ngokuqhelekileyo kucetyiswa ukuba uyilawule kwi-20℃-40℃. Phantsi kweemeko zobushushu obuphezulu, i-cellulose inokonakala, nto leyo ekhokelela ekunciphiseni impembelelo yayo yokutyeba kunye ne-viscosity.
Ukugcinwa kwesisombululo: Izisombululo zeHydroxyethyl cellulose ngokubanzi kufuneka zilungiswe kwaye zisetyenziswe ngoko nangoko. Ukugcinwa ixesha elide kuya kuchaphazela ukuxinana kwayo kunye nozinzo. Kucetyiswa ukuba kulungiswe isisombululo esifunekayo ngomhla wokuveliswa kwepeyinti ukuze kugcinwe ukusebenza kwayo okuphezulu.
Ukongezwa kwe-hydroxyethyl cellulose kwipeyinti akuyonkqubo yokuxuba nje kuphela, kodwa kufuneka kudityaniswe neemfuno zenkqubo yokwenyani kunye neenkcukacha zokusebenza ukuqinisekisa ukuba ukujiya kwayo, ukumiswa kwayo kunye neempawu zokugcina amanzi zisetyenziswa ngokupheleleyo. Ngexesha lenkqubo yokongeza, qwalasela inyathelo langaphambi kokunyibilika, ulawulo lobushushu bokunyibilika kunye nexabiso le-pH, kunye nokuxuba ngokupheleleyo emva kokongeza. Ezi nkcukacha ziya kuchaphazela ngokuthe ngqo umgangatho kunye nokuzinza kokusebenza kwepeyinti.
Ixesha leposi: Septemba-19-2024