IHydroxYethylcellosi (HEC) iyi-polymer esetshenziswe kabanzi ngomakhiwo wepende nopende ngenxa yezakhiwo zayo eziyingqayizivele ze-rheloological and functional. Le polymer esoluniwe yamanzi itholakala ku-cellulose, i-polymer yemvelo etholakala ezindongeni zeseli zezitshalo. I-HEC isengezo esiguquguqukayo esidlulisela izakhiwo ezahlukahlukene ezifiselekayo zokupenda nokukhulisa ukwakhiwa, okubandakanya ukuqina, ukuqina kokuqina kanye nezindawo zokugeleza ezithuthukisiwe.
1. Isingeniso ku-Hydroxyethyl celtulose (HEC)
(1). Ukwakheka kwamakhemikhali nezakhiwo ze-HEC:
I-Hydroxyyethyl celtulose iyi-ether eguquliwe eguqulwe ngamaqembu ama-hydroxyethyl anamathiselwe kwi-cellulose backbone.
Izinga lokufaka esikhundleni (DS) limelela inani eliphakathi lamaqembu we-hydroxyethyl ngeyunithi ngayinye ye-anhydroglucose e-cellulose futhi ithinta i-solubity kanye ne-viscosity ye-polymer kanye ne-viscosity ye-polymer kanye ne-viscosity ye-polymer.
(2) .Kwenza kanye nokuhambisana:
I-HEC incibilika kalula kuwo womabili lamanzi abandayo nawashisayo, okwenza kube lula ukufaka ekwakhiweni kwamanzi asuselwa emanzini.
Iyahambisana namanye amanye ama-polymers, izengezo nama-solvents asetshenziswa kakhulu embonini yezokupenda kanye nokwezamba.
Izakhiwo ze-Occreeological of HEC in Paints kanye nezembatho
(1). Ukuqina nokulawulwa kwe-Rheology:
Eminye yemisebenzi eyinhloko ye-HEC in Coatings ukwenza njengomuntu omkhulu, ukuhlinzeka nge-viscosity edingekayo yokufaka isicelo nokwakheka kwefilimu.
I-HEC isiza ngokulawulwa kwe-Rheology, ivimbela i-sag futhi iqinisekise ukuxubha okuhle noma ukufafaza.
(2.). Ukuziphatha kwe-Pseudoplastic:
I-HEC inika amandla okuziphatha kwe-Pseudoplastic ekuqagelweni ngamanani, okusho ukuthi ukubonakala kuncipha ngaphansi kwe-shear, ukwenza uhlelo lokusebenza nokulinganisa kube lula.
Lesi sici sibalulekile ukuze sifinyelele ngisho nokumboza futhi sinciphise i-roller noma amamaki webhulashi.
(3.) Ukuqiniswa kwemibala kanye nama-fillers:
I-HEC isiza okwesikhashana imibala kanye nama-filler, ukuvikela ukuzinza ngesikhathi sokugcina nesicelo.
Ukuhanjiswa okuthuthukisiwe kwe-pigment kuthuthukisa ukuthuthukiswa kombala kanye nokuqina kwe-coating yokugcina.
I-3. Izinzuzo ezisebenzayo ze-HEC in Coatings
(1). Thuthukisa ukugcinwa kwamanzi:
I-HEC ithuthukisa ukugcinwa kwamanzi ezindaweni zokuhlanganisa, ukuvimba ukoma ngaphambi kwesikhathi nokunwebeka isikhathi esivulekile, okubalulekile ukufeza isiphetho esifanayo.
(2.). Ukwakheka kwefilimu nokunamathelisa:
Ukuba khona kwe-HEC ku-Coatings kusiza ukwakha ifilimu eqhubekayo nenamathela ethuthukisa ukunamathela kuzinhlobonhlobo zama-substrate.
Kuthuthukisa ubuqotho befilimu nokuqina.
(3.). Yehlisa ukuguquguquka:
Izakhiwo ze-hec zika-hec zisiza ukunciphisa i-spatter ngesikhathi sohlelo lokusebenza noma uhlelo lokusebenza lwe-brashi, ukuqinisekisa ukuhlanza, inqubo yokuhlanganisa esebenza kahle.
Izindlela zokuqapha kanye nemihlahlandlela yokwakheka
(1). Izinga elifanele lokuhlushwa kanye nokusebenzisa:
Ukusetshenziswa okusebenzayo kwe-HEC in Coatings kudinga ukucubungula ngokucophelela kokuhlushwa nokufaneleka kokuqina.
Imvamisa, ukugxila kusukela ku-0,1% kuya ku-2% ngesisindo, kepha amazinga afanele ancike kwizidingo ezithile zokuqamba.
(2). PH Sensitivity:
Ukusebenza kwe-HEC kungathintwa yi-PH yokwakhiwa kwenhlanganisela. Ukuhambisana kwe-HEC nezinye izengezo kufanele kubhekwe futhi kulungiswe i-PH uma kunesidingo.
(3) Ukuqina kwe-.temperature:
I-HEC iqinile ngaphezulu kobubanzi bokushisa obubanzi, kepha ukuvezwa isikhathi eside kumazinga okushisa aphezulu kungadala ukulahleka kwe-viscoty. Amakhemikhali kufanele acabangele izimo zesicelo ezilindelekile.
5. Ukucatshangelwa Kwezemvelo Nokulawula
(1). Umthelela Wezemvelo:
I-HEC isuselwa ku-cellulose, insiza engavuselelwa, futhi iyinto engathandeki. Umthelela wayo wezemvelo ngokuvamile uthathwa phansi.
(2.). Ukulandela umthetho wokulawula:
Amakhemikhali adinga ukuqinisekisa ukuthi ukusetshenziswa kwe-HEC kuhambisana nemithetho yasekhaya neyamanye amazwe maqondana nokusetshenziswa kwamakhemikhali kupende kanye nezingubo.
6. Izitayela zesikhathi esizayo kanye nezinto ezintsha
(1). Inqubekela phambili ye-HEC Technology:
Ukucwaninga okuqhubekayo kuhlose ukuthuthukisa ukusebenza kwama-HEC ngokuguqulwa, njengokuletha amaqembu amasha asebenzayo noma ukuthuthukisa ukusatshalaliswa kwesisindo kwamangqamuzana.
(2). I-Green Chemistry kanye nemikhuba esimeme:
Umkhakha we-Paint kanye noCoatings uya ngokuya ugxile ekusimeni. Amakhemikhali ahlola ezinye izindlela nezindlela ezinobungane zemvelo kanye nemikhuba, kufaka phakathi ama-polymers asuselwa kwi-bio kanye ne-solvents eco-enobungane.
I-HydroxyYethylcellulose (HEC) idlala indima ebalulekile embonini wepende kanye nezembatho, isiza ukuthuthukisa i-Rheology ye-Rheology, ukusebenza kanye nokusebenza kohlelo lokusebenza. Ukuguquguquka okuhlukahlukene, ukuhambisana kanye nobungani bezemvelo kwenza kube yinto ebalulekile ukufezekisa izici zokusebenza ezifiselekayo ekusungulweni kwamanzi okunamanzi. Njengoba imboni iqhubeka nokuvela, ukucwaninga okuqhubekayo kanye nokwenziwa okusha ku-polymer science cishe kuqhubekela phambili ekusebenziseni i-HEC namanye ama-polymer afanayo ezixazululweni ezijwayelekile zenhlamba.
Isikhathi sePosi: Feb-19-2025