Iselulosi yeHydroxyethyl (HEC), ilitye elimhlophe okanye elikhanyayo elityheli, elingenavumba, elingenatyhefu okanye umgubo oqinileyo, olungiselelwe yi-etherification ye-alkaline cellulose kunye ne-ethylene oxide (okanye i-chlorohydrin), ephuma kwi-genus Nonionic soluble cellulose ethers. Ngenxa yokuba i-HEC ineempawu ezintle zokuqina, ukumisa, ukusabalalisa, i-emulsifying, i-bonding, ifilimu-ifom, ukukhusela umswakama kunye nokubonelela nge-colloids ekhuselayo, isetyenziswe ngokubanzi ekuhloliseni ioli, iingubo, ukwakhiwa, amayeza kunye nokutya, iingubo, i-papermaking kunye neepolymers. Polymerization kunye nezinye iinkalo.
Emva kokuba i-hydroxyethyl cellulose idibana nepeyinti esekwe emanzini?
Njenge-non-ionic surfactant, i-hydroxyethyl cellulose inezi mpawu zilandelayo ukongeza ekujikeni, ukunqumamisa, ukubopha, ukudada, ukwenza ifilimu, ukusasaza, ukugcinwa kwamanzi kunye nokubonelela ngee-colloids ezikhuselayo:
I-HEC iyancibilika kumanzi ashushu okanye abandayo, kwaye ayigqithisi kwiqondo lokushisa eliphezulu okanye ukubilisa, okwenza ibe noluhlu olubanzi lwe-solubility kunye neempawu ze-viscosity, kunye ne-gelling engeyiyo i-thermal;
Umthamo wokugcina amanzi uphindwe kabini kune-methyl cellulose, kwaye unolawulo olungcono lokuhamba;
Xa kuthelekiswa ne-methyl cellulose eyaziwayo kunye ne-hydroxypropyl methyl cellulose, isakhono sokusasazeka kwe-HEC yeyona nto imbi kakhulu, kodwa amandla okukhusela e-colloid awona anamandla;
Ayiyo-ionic kwaye inokuhlalisana kunye noluhlu olubanzi lwezinye iipolima ezinyibilikayo emanzini, ii-surfactants, kunye neetyuwa. Yinto egqwesileyo ye-colloidal thickener yezisombululo eziphezulu ze-electrolyte.
Uyisebenzisa njani i-hydroxyethyl cellulose?
Yongeza ngokuthe ngqo ngexesha lemveliso - le ndlela yeyona ilula kwaye ithatha ixesha elincinci:
Qalisa ukuvuselela ngokuqhubekayo ngesantya esiphantsi kwaye kancinane uhluze i-hydroxyethyl cellulose ngokulinganayo kwisisombululo kwaye uqhubeke uvuselela de onke amasuntswana afakwe emanzini. Emva koko yongeza izigcini kunye nezongezo ezahlukeneyo. Ezinje ngebala, izixhobo zokusasaza, i-ammonia, njl. Gqugquzela de yonke i-cellulose ye-hydroxyethyl ichithwe ngokupheleleyo (i-viscosity yesisombululo iyanda kakhulu) ngaphambi kokuba ungeze amanye amacandelo kwifomula ukuphumeza ukusabela.
Ixhotyiswe ngotywala bemama
Kukulungisa utywala oomama kunye noxinzelelo oluphezulu kuqala, kwaye ungeze kwimveliso. Inzuzo yale ndlela kukuba inokuguquguquka okukhulu kwaye inokongezwa ngokuthe ngqo kwimveliso egqityiweyo, kodwa kufuneka igcinwe ngokufanelekileyo. Amanyathelo ale ndlela afana namanyathelo amaninzi kwiNdlela yoku-1; Umahluko kukuba akukho mfuneko ye-agitator ephezulu-shear, kwaye kuphela ezinye ii-agitators ezinamandla ezaneleyo zokugcina i-cellulose ye-hydroxyethyl ngokulinganayo ihlakazwe kwisisombululo ingasetyenziselwa, kwaye iqhube phambili i-Vuthuza ide inyibilike ngokupheleleyo kwisisombululo se-viscous. Nangona kunjalo, kufuneka kuqatshelwe ukuba i-agent ye-antifungal kufuneka yongezwe kumama otywala ngokukhawuleza.
Iingcebiso ezinobubele:
Ekubeni i-hydroxyethyl cellulose efakwe kumphezulu ingumgubo okanye i-fibrous solid, xa ulungiselela utywala be-hydroxyethyl cellulose, khumbuza ukuba uthathele ingqalelo kwezi ngongoma zilandelayo:
Ngaphambi nangemva kokongeza i-hydroxyethyl cellulose, kufuneka igcinwe ivuselela de isisombululo sicace ngokupheleleyo kwaye sicace;
Kufuneka ihlulwe kwi-barrel yokuxuba ngokukhawuleza, kwaye musa ukudibanisa ngokuthe ngqo i-lumps okanye i-spheroids kunye ne-hydroxyethyl cellulose kwi-barrel yokuxuba;
Ubushushu bamanzi kunye nexabiso le-pH lamanzi linobudlelwane obubalulekileyo kunye nokuchithwa kwe-hydroxyethyl cellulose, ngoko ke ingqwalasela ekhethekileyo kufuneka ihlawulwe kuyo;
Musa ukongeza ezinye izinto zealkaline kumxube phambi komxubei-hydroxyethyl celluloseumgubo ugalelwe ngamanzi. Ukuphakamisa ixabiso le-pH emva kokucwina kuya kunceda ukunyibilika;
Kangangoko kunokwenzeka, yongeza i-agent ye-antifungal kwangaphambili;
Xa usebenzisa i-high-viscosity hydroxyethyl cellulose, ukuxinwa kotywala komama akufanele kube ngaphezu kwe-2.5-3% (ngobunzima), ngaphandle koko utywala oomama kunzima ukuphatha.
Ixesha lokuposa: Apr-28-2024