Focus on Cellulose ethers

Izinto ezichaphazela ukugcinwa kwamanzi kwiSelulosi

Ngokuqhelekileyo, i-viscosity ye-hydroxypropyl methylcellulose iphezulu. Nangona kunjalo, kukwaxhomekeke kwiqondo lokuthatha indawo kunye nomndilili weqondo lokuthatha indawo. IHydroxypropyl methyl cellulose yeye-non-ionic cellulose ether, inkangeleko ingumgubo omhlophe, ayinavumba kwaye ayinancasa, inyibilika emanzini kunye nezona zinyibilikilisayo zepolar eziphilayo kunye nomlinganiselo ofanelekileyo we-ethanol / amanzi, ipropanol / amanzi, i-dichlorethylene Ayinyibiliki kwi-alkanes, i-acetone, kunye ne-ethanol epheleleyo, kwaye idumba ibe yisisombululo esicacileyo okanye esincinci se-colloidal kumanzi abandayo. Isisombululo samanzi sinomsebenzi ongaphezulu, senza ifilimu encinci emva kokumisa, iguqulelwe ukuguqulwa ukusuka kwi-sol ukuya kwi-gel ngokulandelelana ekufudumeni nasekupholiseni. Ukucaca okuphezulu kunye nokusebenza okuzinzileyo.

IHydroxypropyl methylcellulose inepropathi ye-thermal gelation. Emva kokuba isisombululo se-aqueous semveliso sishushu, senza i-gel kunye ne-precipitates, kwaye ichithe emva kokupholisa. Ukushisa kwe-gelation yeenkcukacha ezahlukeneyo kuyahluka. Ukunyibilika kuyahluka kunye ne-viscosity. I-viscosity ephantsi, i-solubility enkulu. Iipropati ze-hydroxypropyl methylcellulose ezineenkcazo ezahlukeneyo zahlukile. Ukuchithwa kwe-hydroxypropyl methylcellulose emanzini akuchaphazeli ixabiso le-pH.

Iimpawu: Ineempawu zokukwazi ukutyeba, ukukhutshwa kwetyuwa, ukuzinza kwe-PH, ukugcinwa kwamanzi, ukuzinza kwe-dimensional, ipropathi egqwesileyo yokwenza ifilimu, uluhlu olubanzi lokumelana ne-enzyme, ukusabalalisa kunye nokubambisana.

Ukugcinwa kwamanzi kwiimveliso ze-hydroxypropyl methylcellulose zihlala zichatshazelwa zezi zinto zilandelayo:
1. Ukufana kwe-hydroxypropyl methylcellulose
I-hydroxypropyl methylcellulose efunyenwe ngendlela efanayo, i-methoxyl kunye ne-hydroxypropoxyl zisasazwa ngokulinganayo, kwaye izinga lokugcinwa kwamanzi liphezulu.
2. I-Hydroxypropyl methylcellulose i-thermal gel yokushisa
Ukuphakama kobushushu bejeli ye-thermal, kuphezulu izinga lokugcinwa kwamanzi; kungenjalo, isantya esezantsi yokugcina amanzi.
3. I-Viscosity ye-hydroxypropyl methylcellulose
Xa i-viscosity ye-hydroxypropyl methylcellulose inyuka, izinga lokugcinwa kwamanzi liyanda; xa i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwezinga lokugcinwa kwamanzi kuthanda ukuba mnene.
4. Isixa se-hydroxypropyl methylcellulose esongeziweyo
Ubuninzi be-hydroxypropyl methylcellulose eyongeziweyo, iphezulu izinga lokugcinwa kwamanzi kunye nesiphumo esingcono sokugcina amanzi. Kuluhlu lwe-0.25-0.6% yokongezwa, izinga lokugcinwa kwamanzi landa ngokukhawuleza kunye nokunyuka kwexabiso elongezelelweyo; xa isixa-mali esongeziweyo sinyuka ngakumbi, ukunyuka kwezinga lokugcinwa kwamanzi kuyehla.


Ixesha lokuposa: Mar-14-2023
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