Inqubo yokukhiqiza kanye nokwenza kweHydroxYethyl Cellulose (HEC)

I. Isingeniso

IHydroxYethyl Cellulose (HEC) i-polymer engenawo amanzi e-ionic asetshenziswa kabanzi ekukhishweni kwamafutha, ukumboza, ukwakhiwa, amakhemikhali nsuku zonke, ukuphazamiseka kanye nezinye izinkambu. I-HEC itholakala ngokuguqulwa kwamakhemikhali kwe-cellulose, futhi izakhiwo zayo nokusetshenziswa kunqunywa ikakhulu yi-hydroxyethyl substitunts kuma-molecule e-cellulose.

II. Inqubo yokukhiqiza

Inqubo yokukhiqiza ye-HEC ikakhulukazi ifaka lezi zinyathelo ezilandelayo: I-CelLeLose Etherification, Ukugeza, Ukuphelelwa amanzi, ukomisa nokugaya. Okulandelayo ukwethulwa okuningiliziwe kwesinyathelo ngasinye:

I-Cellulose Ehelification

I-cellulose yelashwa okokuqala nge-Alkali ukuze ithole i-Alkali Cellulose (I-Cellulose Alkali). Le nqubo ivame ukwenziwa ku-reactor, usebenzisa isixazululo se-sodium hydroxide ukwelapha iselula yemvelo ukwakha i-alkali cellulose. Ukusabela kwamakhemikhali kungokulandelayo:

Cell-Oh + Naoh → Cell-O-Na + H22OCELL-OH + NAOH → Cell-O-Na + H 2O

Ngemuva kwalokho, u-Alkali Cellulose uphendula nge-Ethylene oxide ukwakha i-hydroxyethyl cellulose. Ukusabela kwenziwa ngaphansi kwengcindezi ephezulu, imvamisa engama-30-100 ° C, futhi ukusabela okuthile kungokulandelayo:

Cell-O-na + ch2ch2o → cell-o-ch2chch2oh-o-na + ch 2ch 2o → cell-o-ch 2ch 2ch 2

Lokhu kusabela kudinga ukulawulwa okuqondile kokushisa, ingcindezi kanye nenani le-oxide ye-ethylene engezwe ukuqinisekisa ukufana nekhwalithi yomkhiqizo.

Ukugeza

I-HEC ephumayo ephumayo imvamisa iqukethe i-alkali engekho emthethweni, i-ethylene oxide neminye yemikhiqizo, edinga ukususwa ngokugeza kwamanzi noma ukugeza kwamanzi okuphilayo. Inani elikhulu lamanzi liyadingeka ngesikhathi senqubo yokugeza amanzi, futhi amanzi angcolile ngemuva kokugeza kudinga ukuphathwa futhi akhishwe.

Dehydration

I-hec emanzi ngemuva kokugeza izidingo zokuphelelwa amanzi emzimbeni, imvamisa ngokuhlunga kwe-vacuum noma ukwehlukaniswa kwe-centrifugal ukunciphisa okuqukethwe umswakama.

-Okunceyoma

I-hec ekhishwe ngamanzi yomiswa, imvamisa ngokufafaza noma ukomisa nge-flash. Izinga lokushisa nesikhathi kufanele lilawulwe ngokuqinile ngesikhathi senqubo yokomisa ukugwema ukuwohloka kokushisa okuphezulu noma okuhlanganisiwe.

Gonqiweyo

Ibhulokhi yomisiwe ye-HEC idinga ukuba yinhlabathi futhi iboniswe ukufeza ukusatshalaliswa kosayizi ofanayo, bese ekugcineni kwakha umkhiqizo noma umkhiqizo we-granular.

III. Izici Zokusebenza

I-solubity yamanzi

I-HEC ine-solubility yamanzi amahle futhi ingancibilikisa ngokushesha kuwo wonke amanzi abandayo nawashisayo ukwakha isixazululo esibonakalayo noma esibonakalayo. Le mpahla ye-solubity yenza ukuthi isetshenziswe kabanzi njengomuntu osindayo ne-stabilizer in Coatings kanye nemikhiqizo yansuku zonke yamakhemikhali.

Ukuqina

U-HEC ukhombisa umphumela oqinile wokuqina esikhaleni esinamanzi, futhi ukubonakala kwalo kukhuphuka ngokunyuka kwesisindo se-molecular. Le mpahla ekhuthele iyenza ikwazi ukudlala indima ekukhulekeni, ukugcinwa kwamanzi kanye nokwenza ngcono ukusebenza kokwakhiwa ezindaweni ezigqokwa amanzi nokwakha udaka.

I-Rheology

Isixazululo se-hec samanzi sinezinto ezihlukile ze-rheological, futhi i-viscosity yayo iguquguquka ngokushintshwa kwezinga le-shear, okubonisa ukuncipha kwe-shear noma i-pseudoplasticity. Le mpahla ye-Rheological iyenza ikwazi ukulungisa i-fluodity kanye nokwakha ukusebenza kwezingubo zokugqoka kanye noketshezi lokudla lwamafutha.

I-Emulsation kanye nokumiswa

I-HEC ine-emulsation enhle kanye nezindawo zokumiswa, ezingaqinisa izinhlayiya ezimisiwe noma amaconsi kusistimu yokuhlakazeka ukuvikela ukuhlukaniswa kanye nokudideka. Ngakho-ke, i-HEC ivame ukusetshenziswa emikhiqizweni efana ne-emulsion coatings kanye nokumiswa kwezidakamizwa.

Biodegradeability

I-HEC iyi-cellulose yemvelo etholwa nge-biodegrade enhle, akukho ukungcoliswa kwemvelo, futhi ihlangabezana nezidingo zokuvikelwa kwemvelo okuluhlaza.

IV. Izinkambu zohlelo lokusebenza

Ukumboza

Ezinkotsheni ezisuselwa emanzini, i-HEC isetshenziswa njengomuntu omkhulu kanye ne-stabilizer ukuthuthukisa uketshezi, ukusebenza kwezokwakha kanye nezindawo zokulwa nama-anti-sagging ezimbozo.

Ukwakha

Ezintweni zokwakha, i-HEC isetshenziswa olimini osuselwa kuso usimende kanye no-putty powder ukwenza ngcono ukusebenza kokwakha nokugcinwa kwamanzi.

Amakhemikhali nsuku zonke

Ku-detegents, ama-shampoos, kanye namazinyo, i-hec isetshenziswa njenge-sikhulu ne-stabilizer ukuthuthukisa umuzwa nokuqina komkhiqizo. 

Ama-oilfields

Ekuvuthweni kwamafutha kanye nokuphupha uketshezi, i-HEC isetshenziselwa ukulungisa i-Rheology kanye nokumiswa kwezindawo zoketshezi lokumba futhi kuthuthukise ukusebenza kahle nokuphepha.

Ukuphanga

Enqubweni yokuphambana, i-HEC isetshenziselwa ukulawula uketshezi lwe-pulp futhi ithuthukise ukufana kanye nezindawo zephepha.

IHydroxYethyl Cellulose (I-HEC) isetshenziswe kabanzi emasimini amaningi ezimboni ngenxa ye-solubity yayo enhle kakhulu yamanzi, ukuqina, izakhiwo ze-rheologing, ama-emulsadiation kanye nokumiswa kwe-biodegracatiobility. Inqubo yayo yokukhiqiza ivuthiwe. Ngezinyathelo ze-cellulose ukusheshisa, ukugeza, ukomisa emzimbeni, ukomisa nokugaya, imikhiqizo ye-HEC ngokusebenza okuzinzile futhi ikhwalithi enhle ingalungiswa. Ngokuzayo, ngokuthuthukiswa kwezidingo zokuvikelwa kwemvelo kanye nentuthuko yezobuchwepheshe, amathemba wesicelo se-HEC azoba abanzi.