I-HEC (i-hydroxyethyl cellulose) yi-nonionic cellulose ether esetyenziswa kakhulu kushishino lwezogquma. Imisebenzi yayo ibandakanya ukuqina, ukusasaza, ukuxhoma kunye nokuzinzisa, okunokuphucula ukusebenza kolwakhiwo kunye nefuthe lokwenza ifilimu kwezogquma. I-HEC isetyenziswa kakhulu kwiingubo ezisekelwe emanzini kuba inokunyibilika kakuhle emanzini kunye nozinzo lweekhemikhali.
1. Indlela yokusebenza ye-HEC
Isiphumo sokuqina
Omnye wemisebenzi ephambili ye-HEC kwiingubo zokugquma kukutyeba. Ngokwandisa ubungqindilili benkqubo yokugquma, iipropati zokugquma kunye nokulinganisa kwengubo zinokuphuculwa, isenzeko sokuwa singancitshiswa, kwaye ingubo inokwenza umaleko ofanayo wokugquma eludongeni okanye kwezinye iindawo. Ukongeza, i-HEC inamandla amakhulu okutyeba, ngoko ke inokufezekisa isiphumo esifanelekileyo sokutyeba nokuba inokongeza kancinci, kwaye isebenza kakuhle kakhulu kwezoqoqosho.
Ukumiswa kunye nokuzinzisa
Kwinkqubo yokugquma, amasuntswana aqinileyo afana neepigment kunye nezizalisi kufuneka asasazwe ngokulinganayo kwizinto ezisisiseko, kungenjalo kuya kuchaphazela inkangeleko kunye nokusebenza kwengubo. I-HEC inokugcina ngokufanelekileyo ukusasazwa okufanayo kwamasuntswana aqinileyo, ithintele ukuna kwemvula, kwaye igcine ingubo izinzile ngexesha lokugcina. Esi siphumo sokuxhoma sivumela ingubo ukuba ibuyele kwimeko efanayo emva kokugcinwa ixesha elide, inciphisa ukuhluma kunye nokuna kwemvula.
Ukugcinwa kwamanzi
I-HEC inokunceda amanzi akwipeyinti ukuba akhululwe kancinci ngexesha lenkqubo yokupeyinta, ngaloo ndlela yandisa ixesha lokomisa kwepeyinti kwaye ivumele ukuba ilingane ngokupheleleyo kwaye yenziwe ngefilimu eludongeni. Olu phawu lokugcina amanzi lubaluleke kakhulu kwisiphumo sokwakha, ingakumbi kwiindawo zokwakha ezishushu okanye ezomileyo, i-HEC inokunciphisa kakhulu ingxaki yokwakheka kwefilimu embi ebangelwa kukuwohloka kwamanzi ngokukhawuleza.
Ulawulo lwe-Rheological
Iimpawu zerheological zepeyinti zichaphazela ngokuthe ngqo indlela ezivakalelwa ngayo kunye nomgangatho wefilimu yolwakhiwo. Isisombululo esenziwe yi-HEC emva kokunyibilika emanzini sine-pseudoplasticity, oko kukuthi, i-viscosity iyancipha phantsi kwamandla aphezulu okucheba (njengokubrasha nokuqengqeleka), okulula ukuyibrasha; kodwa i-viscosity iyabuya phantsi kwamandla aphantsi okucheba, anokunciphisa ukugoba. Oku akupheleli nje ekuncediseni ulwakhiwo, kodwa kuqinisekisa ukufana kunye nobukhulu bengubo.
2. Iingenelo ze-HEC
Ukunyibilika kwamanzi okulungileyo
I-HEC yinto yepolymer enyibilikayo emanzini. Isisombululo esenziwe emva kokunyibilika sicacile kwaye sicacile, kwaye asinazo iziphumo ezimbi kwinkqubo yepeyinti esekwe emanzini. Ukunyibilika kwayo kukwamisela ukuba kulula kangakanani ukusetyenziswa kwayo kwinkqubo yepeyinti, kwaye inokunyibilika ngokukhawuleza ngaphandle kokuvelisa amasuntswana okanye ii-agglomerates.
Uzinzo lweekhemikhali
Njenge-non-ionic cellulose ether, i-HEC inozinzo oluhle lweekhemikhali kwaye ayichaphazeleki lula zizinto ezifana ne-pH, ubushushu, kunye nee-ion zesinyithi. Inokuhlala izinzile kwiindawo ezinamandla ze-asidi kunye ne-alkaline, ngoko ke inokuqhelana neentlobo ezahlukeneyo zeenkqubo zokugquma.
Ukhuseleko lokusingqongileyo
Ngokuphuculwa kolwazi ngendalo, iingubo eziphantsi ze-VOC (i-volatile organic compound) ziya zithandwa kakhulu. I-HEC ayinabungozi, ayinazo izinyibilikisi zendalo, kwaye iyahlangabezana neemfuno zokhuseleko lwendalo, ngoko ke inoluhlu olubanzi lwezinto ezingasetyenziswa kwiingubo ezinobuhlobo nokusingqongileyo ezisekelwe emanzini.
3. Impembelelo ye-HEC kwizicelo ezisebenzayo
Iingubo zodonga zangaphakathi
Kwizinto zokugquma eludongeni ngaphakathi, i-HEC njengesithambisi kunye nesiguquli se-rheology inokuphucula ukusebenza kolwakhiwo lwento yokugquma, inike inqanaba elihle kunye nokunamathela. Ukongeza, ngenxa yokugcina kwayo amanzi kakuhle, i-HEC inokuthintela ukuqhekeka okanye ukugutywa kwento yokugquma eludongeni ngaphakathi ngexesha lenkqubo yokomisa.
Iingubo zodonga zangaphandle
Iingubo zodonga zangaphandle kufuneka zibe nokumelana okuhle kwemozulu kunye nokumelana namanzi. I-HEC ayinakuphucula kuphela ukugcinwa kwamanzi kunye ne-rheology yengubo, kodwa ikwaphucula neempawu zokungagugi kwengubo, ukuze ingubo ikwazi ukumelana ngcono nomoya nemvula emva kokwakhiwa kwaye yandise ubomi bayo benkonzo.
Ipeyinti yeLatex
Kwipeyinti yelatex, iHEC ayinakusebenza nje kuphela njengesithambisi-mbala, kodwa ikwaphucula ubunono bepeyinti kwaye yenze ifilimu yokugquma ibe buthambile. Kwangaxeshanye, iHEC inokuthintela ukuna kweepigment, iphucule uzinzo lokugcina ipeyinti, kwaye yenze ipeyinti yelatex ihlale iqinile emva kokugcinwa ixesha elide.
IV. Amanyathelo okhuseleko xa ufaka kwaye usebenzisa i-HEC
Indlela yokunyibilikisa
I-HEC idla ngokufakwa kwipeyinti ngendlela yomgubo. Xa isetyenziswa, kufuneka yongezwe kancinci kancinci emanzini ize ixutywe ngokupheleleyo ukuze inyibilike ngokulinganayo. Ukuba ukunyibilika akwanelanga, izinto ezinamaqhekeza zinokuvela, nto leyo echaphazela umgangatho wepeyinti.
Ulawulo lwedosi
Ubungakanani be-HEC kufuneka bulungiswe ngokwefomula yepeyinti kunye nesiphumo sokuqina esifunekayo. Ubungakanani bokongeza ngokubanzi yi-0.3%-1.0% yenani lilonke. Ukongeza okugqithisileyo kuya kubangela ukuba i-viscosity yepeyinti ibe phezulu kakhulu, nto leyo echaphazela ukusebenza kolwakhiwo; ukongeza okungaphelelanga kuya kubangela iingxaki ezifana nokuwa kunye namandla okufihla anganeleyo.
Ukuhambelana nezinye izithako
Xa usebenzisa i-HEC, qaphela ukuba ihambelana nezinye izithako zepeyinti, ingakumbi ii-pigments, ii-fillers, njl. Kwiinkqubo ezahlukeneyo zepeyinti, uhlobo okanye ubungakanani be-HEC bunokufuneka bulungiswe ukuze kuthintelwe iziphumo ezingalunganga.
I-HEC idlala indima ebalulekileyo kushishino lokugquma, ingakumbi kwiingubo ezisekelwe emanzini. Ingaphucula ukusebenza kakuhle, iipropati zokwenza ifilimu kunye nozinzo lokugcina iingubo, kwaye inozinzo oluhle lweekhemikhali kunye nokhuseleko lokusingqongileyo. Njengesiguquli se-thickener kunye ne-rheology esingabizi kakhulu, i-HEC isetyenziswa kakhulu kwiingubo zangaphakathi zodonga, iingubo zangaphandle zodonga kunye neepeyinti ze-latex. Kwizicelo ezisebenzayo, ngokulawula idosi efanelekileyo kunye neendlela ezichanekileyo zokunyibilikisa, i-HEC inokubonelela ngemiphumo efanelekileyo yokugquma kunye nokuzinzisa kwiingubo kwaye iphucule ukusebenza ngokubanzi kweengubo.
Ixesha lokuthumela: Novemba-01-2024