Yintoni indawo yokubilisa ye-hydroxyethyl cellulose?

I-Hydroxyethyl Cellulose (HEC) i-polymer engekho i-ionic yamanzi e-soluble esetyenziswa ngokubanzi kwiingubo, izithambiso, amayeza, ukutya, ukwenza iphepha, ukugrumba ioli kunye nezinye iindawo zoshishino. I-cellulose ether compound efunyenwe nge-etherification ye-cellulose, apho i-hydroxyethyl ithatha indawo yamaqela e-hydroxyl ye-cellulose. Iimpawu ezibonakalayo kunye neekhemikhali ze-hydroxyethyl cellulose zenza enye yezinto ezibalulekileyo ze-thickeners, i-gelling agents, i-emulsifiers kunye ne-stabilizers.

Indawo yokubilisa ye-hydroxyethyl cellulose
I-Hydroxyethyl cellulose yipolymer ephezulu yemolekyuli enobunzima obukhulu bemolekyuli, kwaye indawo yayo yokubilisa ayilula ukuyifumanisa njengaleyo yeekhompawundi ezincinci zemolekyuli. Kwizicelo ezisebenzayo, izixhobo eziphezulu zemolekyuli ezifana ne-hydroxyethyl cellulose azinayo indawo yokubilisa ecacileyo. Isizathu kukuba ezo zinto ziya kubola ngexesha lokufudumeza, kunokuba ziguquke ngokuthe ngqo ukusuka kulwelo ukuya kwirhasi ngotshintsho lwesigaba njengezinto eziqhelekileyo ezincinci zemolekyuli. Ngoko ke, ingcamango "yendawo yokubilisa" ye-hydroxyethyl cellulose ayisebenzi.

Ngokuqhelekileyo, xa i-cellulose ye-hydroxyethyl ishushu kwiqondo lokushisa eliphezulu, iya kuqala inyibilika emanzini okanye kwi-solvent ye-organic ukuze yenze isisombululo se-colloidal, kwaye emva koko kwiqondo lokushisa eliphezulu, ikhonkco le-polymer liza kuqala ukuphuka kwaye ekugqibeleni libole ngokushisa, likhupha iimolekyuli ezincinci ezifana namanzi, i-carbon dioxide kunye nezinye izinto eziguquguqukayo ngaphandle kokufumana inkqubo yokubilisa eqhelekileyo. Ngoko ke, i-hydroxyethyl cellulose ayinayo indawo yokubilisa ecacileyo, kodwa iqondo lokushisa lokubola, elihluka kunye nobunzima be-molecular kunye neqondo lokutshintshwa. Ngokuqhelekileyo, iqondo lobushushu lokubola kwe-hydroxyethyl cellulose lidla ngokuba ngaphezulu kwe-200°C.

Ukuzinza kwe-thermal ye-hydroxyethyl cellulose
Iselulosi yeHydroxyethyl inozinzo olululo lweekhemikhali kwiqondo lobushushu begumbi, inokumelana noluhlu oluthile lweendawo zeasidi kunye nealkali, kwaye inokumelana nobushushu obuthile. Nangona kunjalo, xa iqondo lokushisa liphezulu kakhulu, ngakumbi ngokungabikho kwe-solvents okanye ezinye i-stabilizers, amakhonkco e-polymer aya kuqala ukuphuka ngenxa yesenzo sokushisa. Le nkqubo yokubola kwe-thermal ayihambanga nokubilisa okucacileyo, kodwa kunokuba i-chain breakage ngokuthe ngcembe kunye nokusabela kokuphelelwa ngamanzi emzimbeni, ukukhulula izinto eziguqukayo kwaye ekugqibeleni zishiye iimveliso ze-carbonized.

Kwizicelo zamashishini, ukuze kuthintelwe ukubola okubangelwa ngubushushu obuphezulu, i-hydroxyethyl cellulose idla ngokungavezwa kwindawo edlula ubushushu bayo bokubola. Nakwizicelo zobushushu obuphezulu (ezifana nokusetyenziswa kwe-oilfield drilling fluids), i-hydroxyethyl cellulose isoloko isetyenziswa ngokudityaniswa nezinye izinto zokuphucula ukuzinza kwayo kwe-thermal.

Ukusetyenziswa kwe-hydroxyethyl cellulose
Nangona i-cellulose ye-hydroxyethyl ingenayo indawo ecacileyo yokubilisa, ukunyibilika kwayo kunye neempawu zokuqina zenza ukuba isetyenziswe ngokubanzi kumashishini amaninzi. Umzekelo:

Ishishini lokugquma: i-hydroxyethyl cellulose ingasetyenziswa njenge-thickener yokunceda ukulungelelanisa i-rheology yokwambathisa, ukuthintela imvula kunye nokuphucula umgangatho kunye nokuzinza kwengubo.

Izithambiso kunye neekhemikhali zemihla ngemihla: Yisithako esibalulekileyo kwii-detergents ezininzi, iimveliso zokunakekelwa kwesikhumba, i-shampoos kunye ne-toothpastes, ezinokunika imveliso i-viscosity efanelekileyo, i-moisturizing kunye nokuzinza.

Umzi-mveliso wamachiza: Kumalungiselelo amayeza, i-hydroxyethyl cellulose isoloko isetyenziswa ekuveliseni iipilisi ezikhutshwa ngokuqhubekayo kunye neengubo zokwaleka ukulawula izinga lokukhutshwa kwamachiza.

Ishishini lokutya: Njengento etyebisayo, i-stabilizer kunye ne-emulsifier, i-hydroxyethyl cellulose ikwasetyenziswa ekutyeni, ngakumbi kwi-ayisikrimu, ijeli kunye neesosi.

Ukugaya i-oyile: Kwi-oilfield drilling, i-hydroxyethyl cellulose yinxalenye ebalulekileyo ye-drilling fluid, enokunyusa i-viscosity yolwelo, ukuzinzisa udonga lomthombo kunye nokunciphisa ukulahleka kodaka.

Njengomathiriyeli wepolymer, i-hydroxyethyl cellulose ayinayo indawo yokubilisa ecacileyo kuba ibola kumaqondo obushushu aphezulu endaweni yento eqhelekileyo yokubilisa. Iqondo lokushisa lokubola kwe-thermal lidla ngokuba ngaphezu kwe-200 ° C, kuxhomekeke kubunzima bayo be-molecular kunye neqondo lokutshintshwa. Nangona kunjalo, i-hydroxyethyl cellulose isetyenziswa ngokubanzi kwiingubo, izithambiso, amayeza, ukutya kunye nepetroleum ngenxa yokuqina kwayo okugqwesileyo, i-gelling, i-emulsifying kunye nokuzinza kwayo. Kwezi zicelo, idla ngokuphetshwa ukuba ingavezwa kumaqondo obushushu aphezulu kakhulu ukuqinisekisa ukusebenza kwayo nokuzinza.