Yintoni iHydroxyethyl Cellulose?
I-Hydroxyethyl cellulose (HEC), i-cellulose emhlophe okanye ekhanyayo, engenavumba, i-non-toxic fibrous okanye i-powdery solid, elungiswe yi-etherification reaction ye-alkaline cellulose kunye ne-ethylene oxide (okanye i-chlorohydrin), ye-Nonionic soluble cellulose ethers.Ekubeni i-HEC ineempawu ezintle zokuqina, ukumisa, ukusabalalisa, i-emulsifying, i-bonding, ifilimu-ifom, ukukhusela umswakama kunye nokubonelela nge-colloid ekhuselayo, isetyenziswe ngokubanzi ekuhlolisweni kweoli, ukugubungela, ukwakhiwa, amayeza, ukutya, i-textile, i-papermaking kunye ne-polymerization. kunye neminye imimandla.
Iselulosi yeHydroxyethyl isetyenziswa kakhulu kwishishini lokugquma, makhe sijonge indlela esebenza ngayo kwiingubo:
Kwenzeka ntoni xa i-hydroxyethyl cellulose idibana nepeyinti esekwe emanzini?
Njenge-non-ionic surfactant, i-hydroxyethyl cellulose inezi mpawu zilandelayo ukongeza ekujikeni, ukuxhoma, ukubopha, ukudada, ukwenza ifilimu, ukusasaza, ukugcinwa kwamanzi kunye nokubonelela nge-colloid ekhuselayo:
I-HEC iyancibilika emanzini ashushu okanye amanzi abandayo, ukushisa okuphezulu okanye ukubilisa ngaphandle kwemvula, ukuze ibe noluhlu olubanzi lwe-solubility kunye neempawu ze-viscosity, kunye ne-gelation engeyona i-thermal;
Umthamo wokugcinwa kwamanzi uphindwe kabini kunalowo we-methyl cellulose, kwaye unolawulo olungcono lokuhamba;
Ayiyo-ionic kwaye inokuhlalisana kunye noluhlu olubanzi lwezinye iipolima ezinyibilikayo emanzini, ii-surfactants, kunye neetyuwa.Yinto egqwesileyo ye-colloidal thickener yezisombululo eziphezulu ze-electrolyte;
Xa kuthelekiswa ne-methyl cellulose eyaziwayo kunye ne-hydroxypropyl methyl cellulose, amandla okusasaza e-HEC yeyona nto imbi kakhulu, kodwa amandla okukhusela e-colloid awona anamandla.
Kuba i-hydroxyethyl cellulose enyangwe ngomphezulu ingumgubo okanye i-fibrous solid, la manqaku alandelayo kufuneka alandelwe xa kulungiswa utywala lukamama lwe-hydroxyethyl cellulose:
(1) Ngaphambi nangemva kokongeza i-hydroxyethyl cellulose, kufuneka iqhutywe ngokuqhubekayo de isisombululo sibonakale ngokucacileyo kwaye sicace.
(2) Kufuneka ihluzwe kancinane kwitanki yokuxuba, kwaye ungafaki isixa esikhulu okanye ubeke ngqo i-hydroxyethyl cellulose kwitanki yokuxuba.
(3) Ubushushu bamanzi kunye nexabiso le-PH emanzini linobudlelwane obubalulekileyo kunye nokuchithwa kwe-hydroxyethyl cellulose, ngoko ke kufuneka kuhlawulwe ingqalelo ekhethekileyo.
(4) Musa ukongeza ezinye izinto zealkaline kumxube phambi kokuba umgubo we-hydroxyethyl cellulose ufakwe emanzini.Ukunyusa i-pH emva kokumanzisa kunceda ukunyibilika.
(5) Kangangoko kunokwenzeka, yongeza i-agent ye-antifungal kwangaphambili.
(6) Xa usebenzisa i-high-viscosity hydroxyethyl cellulose, ukuxinwa kotywala komama akufanele kube ngaphezu kwe-2.5-3% (ngobunzima), ngaphandle koko utywala lukamama luya kuba nzima ukuphatha.
Ixesha lokuposa: Nov-21-2022