Ukongiwa kwemisebenzi yobuciko kuyinqubo ethambile futhi eyinkimbinkimbi edinga ukukhethwa ngokucophelela kwezinto ukuze kuqinisekiswe ukulondolozwa nobuqotho bezingcezu zobuciko.I-Cellulose ethers, iqoqo lezinhlanganisela ezithathwe ku-cellulose, bathole izinhlelo zokusebenza ezimbonini ezihlukahlukene ngenxa yezakhiwo zabo ezihlukile, okuhlanganisa ukujiya, ukuqiniswa, nokugcinwa kwamanzi.Emkhakheni wokongiwa kwemisebenzi yobuciko, ukuphepha kwei-cellulose etherskuwukucatshangelwa okubalulekile.Lokhu kuhlola okuphelele kuhlola izici zokuphepha zama-cellulose ether, kugxile ezinhlotsheni ezivamile ezifana ne-Hydroxypropyl Methylcellulose (HPMC), i-Ethyl Hydroxyethyl Cellulose (EHEC), ne-Carboxymethyl Cellulose (CMC).
1. I-Hydroxypropyl Methylcellulose (HPMC)
a.Ukusetshenziswa Okuvamile
I-HPMC ivamise ukuqashwa ekongiweni kwezindawo zayo zokugcina amanzi.Imvelo yayo eguquguqukayo iyenza ifaneleke ekudaleni izinto ezinamathelayo kanye nezihlanganisi ekubuyiseleni izinto ezenziwe ngephepha.
b.Ukucatshangelwa Kokuphepha
I-HPMC ngokuvamile ithathwa njengephephile ukuze ilondolozwe uma isetshenziswa ngobuhlakani.Ukuhambisana kwayo nama-substrates ahlukahlukene kanye nokusebenza kwayo ekugcineni ubuqotho besakhiwo semisebenzi yobuciko yamaphepha kunomthelela ekwamukelweni kwayo emkhakheni wokongiwa kwemvelo.
2. I-Ethyl Hydroxyethyl Cellulose (EHEC)
a.Ukusetshenziswa Okuvamile
I-EHEC ingenye i-ether ye-cellulose esetshenziselwa ukongiwa kwezakhiwo zayo zokujiya nokuzinzisa.Ingase isetshenziswe ekwakhiweni okuhlukahlukene ukuze kuzuzwe izici ozifisayo.
b.Ukucatshangelwa Kokuphepha
Ngokufanayo ne-HPMC, i-EHEC ithathwa njengephephile kwezinye izinhlelo zokusebenza zokonga.Ukusetshenziswa kwayo kufanele kuhambisane nezidingo ezithile zomsebenzi wobuciko futhi kube ngaphansi kokuhlolwa okuphelele ukuze kuqinisekiswe ukuhambisana.
3. I-Carboxymethyl Cellulose (CMC)
a.Ukusetshenziswa Okuvamile
I-CMC, nezakhiwo zayo ezijiyayo neziqinisayo, ithola ukusetshenziswa ezimbonini ezihlukahlukene, kuhlanganise nokongiwa kwemvelo.Ikhethwa ngokusekelwe emandleni ayo okuguqula i-viscosity yezixazululo.
b.Ukucatshangelwa Kokuphepha
I-CMC ngokuvamile ithathwa njengephephile ngezinjongo ezithile zokonga.Iphrofayili yayo yokuphepha iyenza ifanelekele ukusetshenziswa ekwakhiweni okuhloselwe ukuzinzisa nokuvikela imisebenzi yobuciko, ikakhulukazi ezindaweni ezilawulwayo.
4. Imikhuba Engcono Kakhulu Yokongiwa
a.Ukuhlola
Ngaphambi kokusebenzisa noma iyiphi i-cellulose ether emsebenzini wobuciko, abalondolozi bemvelo bagcizelela ukubaluleka kokuhlolwa okuphelele endaweni encane, engabonakali.Lesi sinyathelo siqinisekisa ukuthi okokusebenza kuyahambisana nomsebenzi wobuciko futhi akunayo imiphumela emibi.
b.Ukubonisana
Abalondolozi bezobuciko kanye nezingcweti badlala indima ebalulekile ekunqumeni izinto ezisetshenziswayo ezifanele kakhulu nezindlela zokonga.Ubuchwepheshe babo buqondisa ukukhethwa kwama-cellulose ethers nezinye izinto ukuze kuzuzwe imiphumela efiselekayo yokonga.
5. Ukuthobela Umthetho
a.Ukubambelela Emazingeni
Izinqubo zokongiwa kwemvelo zihambisana namazinga athile nemihlahlandlela ukuze kuqinisekiswe izinga eliphezulu lokunakekelwa kwemisebenzi yobuciko.Ukubambelela kulawa mazinga kubalulekile ekugcineni ukuphepha nobuqotho benqubo yokonga.
6.Isiphetho
ama-cellulose ether afana ne-HPMC, i-EHEC, ne-CMC angabhekwa njengephephile ukuze kulondolozwe umsebenzi wobuciko uma esetshenziswa ngokuvumelana nezinqubo ezihamba phambili.Ukuhlolwa okuphelele, ukubonisana nochwepheshe bezokongiwa kwemvelo, kanye nokuhambisana nezindinganiso kubalulekile ukuze kuqinisekiswe ukuphepha nokusebenza ngempumelelo kwama-cellulose ethers ekongiweni kwemidwebo.Njengoba umkhakha wokongiwa kwemvelo uthuthuka, ucwaningo oluqhubekayo nokusebenzisana phakathi kochwepheshe kunengxenye ekuthuthukisweni kwezinqubo, ukuhlinzeka amaciko nabalondolozi bemvelo ngamathuluzi athembekile okulondoloza amagugu ethu amasiko.
Isikhathi sokuthumela: Nov-22-2023