Gxila kuma-Cellulose ethers

Ukusetshenziswa kwe-hydroxyethyl cellulose(HEC) kupende we-latex

IHydroxyethyl Cellulose (HEC) iyi-ether ye-nonionic cellulose ether ebalulekile encibilika emanzini, esetshenziswa kakhulu ekuhlanganisweni kwezakhiwo, ikakhulukazi opende be-latex. Njenge-thickener ephumelelayo, i-colloid evikelayo, i-ejenti yokumisa kanye ne-aid yokwenza ifilimu, ithuthukisa kakhulu ukusebenza kwepende ye-latex, ithuthukisa izakhiwo zokwakhiwa kopende kanye nomphumela obonakalayo womkhiqizo ophelile.

1. Isakhiwo samakhemikhali kanye nezakhiwo ze-hydroxyethyl cellulose
I-Hydroxyethyl cellulose iphuma ku-cellulose ekhiqizwa ngokwethula iqembu le-hydroxyethyl ku-molecule ye-cellulose. Kuyinhlanganisela ye-polymer encibilika emanzini. Isakhiwo saso samakhemikhali sinquma ukuncibilika kwamanzi okuhle kakhulu kanye nezakhiwo ezishubile. Uma incibilika emanzini, ingakha isixazululo se-viscous esine-adhesion enhle, ukwakheka kwefilimu kanye nemiphumela yokuqina. Lezi zakhiwo zidlala indima ebalulekile kumapende we-latex.

I-Hydroxyethyl cellulose ngokuvamile iyimpushana emhlophe noma ephuzi ekhanyayo noma ama-granules, ancibilika kalula emanzini abandayo noma ashisayo ukuze kwakheke isixazululo se-colloidal esizinzile. Isixazululo saso sinokuzinza okuphezulu futhi singakwazi ukumelana ngokuphumelelayo ne-asidi, i-alkali, i-redox kanye nokuwohloka kwe-microbial. Ngaphezu kwalokho, ngenxa yemvelo engeyona i-ionic ye-hydroxyethyl cellulose, ayisabelani ngokwekhemikhali nezinye izithako kumapende e-latex afana ne-pigment, izigcwalisi noma izithasiselo, ngakho inokuhambisana okubanzi ekwakhekeni kopende we-latex.

2. Indlela yokusebenza ye-hydroxyethyl cellulose kupende we-latex
Kupende we-latex, indima ye-hydroxyethyl cellulose ibonakala ngokuqina, ukugcinwa kwamanzi, ukuqina okuthuthukisiwe nokusebenza okuthuthukisiwe:

Ukuqina komphumela: I-Hydroxyethyl cellulose, njenge-thickener ephumelelayo, ingakhuphula i-viscosity kapende we-latex futhi ikhulise i-thixotropy yayo. Lokhu akuvimbeli ngokuphumelelayo kuphela upende ekugwemeni ngesikhathi sokugcinwa kanye nokufaka isicelo, kodwa futhi kwenza upende ube ngaphezulu ngisho nalapho ugoqwe noma uxutshwe. Umphumela oqinile wokuqina usiza ukulawula i-rheology yopende we-latex, uqinisekisa ukuzwa okuhle lapho ufaka isicelo, futhi uthuthukise ukumbozwa kwefilimu.

Ukugcinwa kwamanzi: I-Hydroxyethyl cellulose inokugcinwa kwamanzi okuhle. Phakathi nenqubo yokomisa kapende we-latex, ingavimbela amanzi ukuthi angahwamuki ngokushesha, ngaleyo ndlela andise isikhathi sokuvula esimanzi sopende futhi aqinisekise ukwakhiwa okushelelayo. Ukwengeza, ukugcinwa kwamanzi okuhle kunganciphisa nokuqhekeka kwefilimu yokugqoka ngemva kokumisa, ngaleyo ndlela kuthuthukise ikhwalithi yonke yefilimu yokugqoka.

Ukuzinza: I-Hydroxyethyl cellulose, njenge-colloid evikelayo, ingavimbela ngempumelelo ama-pigments nama-filler ukuthi angangeni kupende we-latex. Ingakha isistimu ye-colloidal ezinzile ngokusebenzisa isisombululo sayo se-viscous ukuze isakaze ngokulinganayo ingxenye ngayinye futhi iqinisekise ukuzinza kwesitoreji sikapende. Ngesikhathi esifanayo, i-hydroxyethyl cellulose nayo ingathuthukisa ukuzinza kwezinhlayiya ze-emulsion futhi igweme i-delamination kanye ne-agglomeration yesistimu ye-latex ngesikhathi sokugcina.

Ukwakhiwa: Phakathi nenqubo yokwakha, imiphumela yokuqina neyokugcoba kwe-hydroxyethyl cellulose yenza upende we-latex ube nezakhiwo ezinhle zokuhlanganisa nokubeka izinga, ezinganciphisa ngempumelelo izimpawu zebhulashi futhi zithuthukise ukushelela kwefilimu yokuhlanganisa. Ngaphezu kwalokho, ngenxa yokuthi i-hydroxyethyl cellulose ingathuthukisa i-thixotropy kapende, upende we-latex kulula ukuwusebenzisa ngesikhathi somdwebo, unomswakama omuhle ngaphandle kokuconsa, futhi ulungele izindlela ezihlukahlukene zokwakha, njengokuxubha, ukumboza nge-roller nokufutha. .

3. Imiphumela eqondile yokusetshenziswa kwe-hydroxyethyl cellulose kupende we-latex
Thuthukisa ukuqina kwesitoreji sikapende: Ukwengeza inani elifanele le-hydroxyethyl cellulose kufomula kapende we-latex kungathuthukisa kakhulu izici ezimelene nokuxazululeka zikapende futhi kugweme ukufakwa kwezibala nezigcwalisi. Ukuhlakazwa kwe-hydroxyethyl cellulose embotsheni kungagcina ukufana kwesistimu yokumboza futhi kwandise isikhathi sokugcina somkhiqizo.

Thuthukisa izakhiwo ze-rheological of coatings: Izakhiwo ze-rheological zamapende e-latex zibalulekile kwikhwalithi yokwakha. I-Hydroxyethyl cellulose ingasebenzisa i-thixotropy yayo eyingqayizivele ukuze yenze upende ugeleze kalula ngaphansi kwamandla aphezulu okugunda (njengalapho udweba), futhi igcine i-viscosity ephezulu ngaphansi kwamandla aphansi okugunda (njengalapho umile), ukuvimbela i-Sag. Lesi sici senza upende we-latex ube nemiphumela engcono yokwakha nokuhlanganisa, unciphise amamaki anciphayo kanye nokuginqika.

Thuthukisa umphumela obonakalayo kanye nezakhiwo ezibonakalayo zefilimu yokumboza: I-Hydroxyethyl cellulose idlala indima ebalulekile ekubunjweni kwefilimu. Akukwazi nje ukuthuthukisa ukushelela kwefilimu yepende, kodwa futhi kuthuthukise ukumelana nokugqoka nokumelana namanzi kwefilimu yopende, ukwandisa impilo yesevisi yefilimu yepende. Ukwengeza, ngenxa yokugcinwa kwamanzi okuhle, ukugqoka kumile ngokulinganayo, okusiza ukugwema izinkinga ezifana nemibimbi, ama-pinholes kanye nokuqhekeka, okwenza ubuso be-coating bushelelezi.

Ukusebenza kwemvelo okuthuthukisiwe: I-Hydroxyethyl cellulose iphuma ku-cellulose yemvelo, inokubola okuhle kakhulu kwemvelo, futhi ngeke ingcolise imvelo. Uma kuqhathaniswa nama-thickeners okwenziwa endabuko, ihambisana nemvelo futhi ihlangabezana nezidingo zezinto zokwakha eziluhlaza zanamuhla. Ngaphezu kwalokho, ayinawo ama-volatile organic compounds (VOC), ngakho-ke ukusebenzisa i-hydroxyethyl cellulose kupende we-latex kusiza ukunciphisa ukukhishwa kwe-VOC futhi kuthuthukise ikhwalithi yomoya yendawo yokwakha.

Njengesengezo esibalulekile kupende we-latex, i-hydroxyethyl cellulose ingathuthukisa kakhulu ukusebenza kokwakhiwa kanye nomphumela wokugcina wokuhlanganisa wepende ye-latex ngokusebenzisa ukuqina kwayo okuhle kakhulu, ukugcinwa kwamanzi, ukuzinza kanye nezakhiwo zefilimu. Ngesikhathi esifanayo, ngenxa yokuvikelwa kwemvelo kanye nezici eziphansi ze-VOC, i-hydroxyethyl cellulose ihlangabezana nezidingo eziluhlaza nezemvelo zemboni yesimanje yokumboza. Ngokuthuthuka okuqhubekayo kobuchwepheshe, amathuba okusetshenziswa kwe-hydroxyethyl cellulose kupende we-latex azoba banzi, anikeze izixazululo ezingcono zokuthuthukiswa okusimeme kwemboni yokuhlanganisa izakhiwo.


Isikhathi sokuthumela: Sep-20-2024
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