Izakhiwo ze-hydroxyethyl cellulose

IHydroxYethyl Cellulose (I-HEC) iyi-polymer evamile enamanzi engenayo enamanzi ancibilikayo asetshenziswa kakhulu ezinkambeni zezimboni ezahlukahlukene. Ikhiqizwa ikakhulukazi ukusabela kwamakhemikhali njenge-alkalization kanye nokuthezeka kwe-cellulose yemvelo. Inezakhiwo ezihlukile ngokomzimba nangamakhemikhali, okwenza kube yinto ebaluleke kakhulu kwizicelo eziningi.

1. Isakhiwo samakhemikhali nesisindo samangqamuzana
Iyunithi eliyisisekelo lesakhiwo se-hydroxyethyl celtulose liyi-cellulose chain eyakhiwe ngama-molecule e-glucose. Ezikhundleni ezithile ze-hydroxyls ze-chain yalo yamangqamuzana, amaqembu e-hydroxyyethyl (-ch2chchoh) angeniswa ngokusabela kokuthezeka. Ngenxa yokwethulwa kwalawa maqembu, i-Hydroxyyethyl cellulose i-hydrophilic eyengeziwe futhi ine-solubility engcono kune-cellubelose emsulwa. Ngokwezidingo zohlelo lokusebenza ezahlukahlukene, izinga lokufaka esikhundleni (DS) kanye ne-molar anclusiotion (MS) ye-Hydroxyethyl celtulese ingashintshwa, ngaleyo ndlela kuthinte izakhiwo zayo ezisemqoka njengokuhlaselwa, ukuhlakanipha kanye nekhono lokuqina. Ngokuvamile, uhla lwe-molecular isisindo se-HEC lubanzi, lusuka kumashumi ezinkulungwane zezigidi zamadada, okwenza libonise izakhiwo ezahlukahlukene ze-rhelogical ngesisombululo se-aquological.

2. I-solubility yamanzi nokuziphatha okuchithekayo
Ngenxa yezakhiwo zayo ezingezona eze-ionic, i-hydroxyyethyl celtule Izinga lokuchithwa kwalo lincike kusisindo samangqamuzana, izinga lokufaka esikhundleni kanye nokushisa kwamanzi. Izinhlobo ze-hec eziphakeme ze-hec zincibilikisa kancane kancane kepha zakha izisombululo eziphakeme kakhulu, ngenkathi izinhlobo eziphansi zesisindo zincibilika kalula kepha zikhiqiza ama-viscosities aphansi. Ngenxa yemvelo engeyona eye-ionic yesixazululo sayo, i-HEC inokubekezelelana okuhle kwezinguquko ze-PH nama-electrolyte futhi ingagcina isimo sayo esincibilikisiwe nokuqina ngaphezu kwebanga le-PH (2-12).

I-3. Ukuqina kanye nezakhiwo ze-Rheological
Enye yezakhiwo eziphawuleka kakhulu ze-HEC yikhono layo elikhudlwana. Ngokugxila okuphansi (0.5% -2%), izixazululo ze-HEC zingakhombisa imiphumela ebalulekile yokuqina futhi zibonise izici ze-pseudoplastic fluid, okusho ukuthi isilinganiso se-shear sincipha, okusho ukuthi isixazululo sincipha, okuwusizo kakhulu kuzinhlelo zokusebenza ezifana nezimbambo ezinjengezembatho kanye nama-emulsions. Ngaphezu kwalokho, i-HEC ingasebenza futhi ngokuxhumana nabanye abakhulu njenge-carboxymethyllls (CMC) kanye ne-xanthan gum ukuthuthukisa umphumela wokuqina noma ukulungisa i-mboology.

4. Ukuqina kanye nokuhambisana
I-HEC inokuqina okuhle kwamakhemikhali futhi ayithambekele ekunciphiseni noma kuguquko lwamakhemikhali ngaphansi kwezimo eziningi. Isixazululo saso singakubekezelela ukugxila okuphezulu kwama-electrolyte kanye nobubanzi be-PH, okwenza kuzinze ezindaweni ezahlukahlukene eziyinkimbinkimbi. Ngaphezu kwalokho, i-HEC nayo iyahambisana namanye amakhemikhali amaningi afana nama-surfactants, ama-polymers, usawoti we-inormers, njll.

5. Izindawo zohlelo lokusebenza
Ngenxa yezakhiwo zayo ezihlukile, i-HEC isetshenziswe kabanzi emikhakheni eminingi. Okulandelayo ezinye izinhlelo zokusebenza ezijwayelekile:

Izinto zokwakha: Ezakhiweni zokwakha, amapende, ama-powders ama-putty, njll.

Ukukhishwa kawoyela: Embonini kawoyela, i-hec isetshenziswa lapho kulungiswa uketshezi lokumba kanye nokuqedwa koketshezi njengogqinsi olukhudlwana kanye noketshezi lokunciphisa ukuthuthukisa ukuwa kwe-mboology.

Izimonyo kanye nemikhiqizo yokunakekelwa komuntu siqu

Imboni yezemithi: Ukukhiqiza izidakamizwa, i-HEC isetshenziswa njengosizo lokubumba, umenzeli okhuphukayo kanye nokumisa i-ejenti yokumisa amaphilisi okusiza ukulawula isilinganiso sokukhishwa kwezidakamizwa emzimbeni.

Imboni yokudla: yize isetshenziswa ngamanani amancane, i-HEC ingasetshenziswa futhi njengesengezo sokudla ukuze kulungiswe i-viscosity nokunambitheka kokudla.

6. Ukuvikelwa kwezemvelo nokuphepha
I-HEC iyi-cellulose yemvelo etholwa nge-biodegrade enhle, ngakho-ke inomthelela omncane emvelweni ngemuva kokusetshenziswa. Ngaphezu kwalokho, i-HEC ibhekwa njengamakhemikhali aphephile futhi isetshenziswa kabanzi kwimikhiqizo ehlangana nomzimba womuntu, njengezimonyo, izidakamizwa nokudla. Noma kunjalo, ngesikhathi sokukhiqizwa kwezimboni kanye nokusebenzisa, imithetho yokuphepha ehambisanayo kumele isalandelwa ukuvikela ukucasuka okucasulayo okungabangelwa ukuphefumula noma ngokuxhumana kwesikhathi eside.

7. Isitoreji futhi usebenzise izinyathelo zokuphepha
I-Hydroxyyethyl celtulose kufanele igcinwe endaweni eyomile nelipholile ukugwema umswakama nokuqola. Lapho usebenzisa, kufanele kungezwe emanzini kancane futhi ngokulinganayo ukugwema ukulondolozwa okubangelwa ukungeza inani elikhulu ngasikhathi sinye. Ngasikhathi sinye, ngoba kuthatha isikhathi esithile sokuncibilika, kuvame ukudingekile ukushiya isikhashana ngemuva kokuncipha kokuqinisekisa ukuqothulwa okuphelele nokubonakaliswa okuqinile.

Ngenxa ye-solubility yayo enhle kakhulu, ukuqina, ukuqina kanye nokuhambisana, i-hydroxyyethyl cellulose isibe isengezo esisemqoka ezinkambeni eziningi zezimboni. Ngokuthuthuka okuqhubekayo kobuchwepheshe, ubukhulu besicelo se-HEC bazoqhubeka nokwandisa, ukuhlinzeka ngezisombululo ezingcono zemikhakha ehlukahlukene.