Tus nqi qis hec hydroxyethyl cellulose

Hydroxyethyl cellulose (HEC) yog cov khoom siv hluav taws xob ntau yam siv dav hauv ntau lub lag luam, suav nrog txheej txheej, nplaum, cov khoom tu tus kheej, thiab tshuaj. Raws li qhov kev thov rau HEC loj hlob hauv cov kev lag luam no, cov tuam ntxhab tab tom nrhiav txoj hauv kev los muab cov nqi qis dua kom tau raws li kev lag luam xav tau. Hauv tsab xov xwm no, peb yuav tham txog qee txoj hauv kev uas cov tuam txhab lag luam tuaj yeem muab cov khoom lag luam HEC qis.

Ib txoj hauv kev los muab cov nqi qis HEC yog tsim los siv cov khoom siv pheej yig dua. HEC yog muab los ntawm cellulose, uas feem ntau tau los ntawm cov ntoo pulp, paj rwb linters, los yog lwm yam nroj tsuag. Txawm li cas los xij, tus nqi ntawm cellulose tuaj yeem sib txawv nyob ntawm qhov chaw thiab qhov zoo. Cov neeg tsim khoom siv tau cov qib qis lossis rov ua dua cellulose los tsim HEC, uas tuaj yeem pab txo cov nqi tsim khoom.

Lwm txoj hauv kev los muab cov nqi qis HEC yog txhawm rau txhim kho cov txheej txheem ntau lawm. HEC feem ntau yog tsim los ntawm reacting cellulose nrog ethylene oxide, ua raws li etherification nrog monochloroacetic acid los yog lwm yam tshuaj. Cov txheej txheem ntau lawm tuaj yeem ua kom zoo dua los ntawm kev siv cov tshuaj tiv thaiv zoo dua, xws li qhov kub thiab txias siab dua, lossis los ntawm kev siv cov tshuaj tiv thaiv sib txawv. Kev ua kom zoo ntawm cov txheej txheem tsim khoom tuaj yeem txo cov nqi tsim khoom thiab ua rau cov khoom siv HEC qis dua.

Ib txoj hauv kev thib peb los muab HEC tus nqi qis yog tsom rau kev tsim HEC nrog cov qib qis qis dua. HEC muaj nyob rau hauv ntau qib viscosity, xws li qis mus rau siab. Cov qib viscosity siab dua feem ntau muaj cov khoom thickening zoo dua thiab kim dua. Los ntawm kev tsim cov qib viscosity qis dua ntawm HEC, cov tuam ntxhab tuaj yeem muab cov khoom lag luam qis dua uas tseem ua tau raws li kev lag luam xav tau.

Thaum kawg, cov tuam txhab lag luam tuaj yeem muab cov nqi qis HEC los ntawm kev tsom mus rau cov txheej txheem tsim khoom raug nqi. Piv txwv li, qee cov tuam ntxhab tau tsim cov txheej txheem tsim khoom tshiab uas siv lub zog tsawg lossis cov tshuaj tsawg dua, ua rau cov nqi tsim khoom qis dua. Lwm cov tuam txhab lag luam yuav tsom mus rau kev ua kom zoo dua lawv cov saw hlau lossis kev faib khoom sib txuas kom txo tau cov nqi thauj mus los thiab khaws cia.

Thaum tab tom nrhiav HEC cov khoom lag luam qis, cov neeg yuav khoom yuav tsum paub txog cov khoom lag luam zoo. Cov khoom lag luam HEC qis dua tuaj yeem muaj qhov purity qis dua, qis dua viscosity, lossis lwm yam teeb meem zoo uas tuaj yeem cuam tshuam rau lawv cov kev ua tau zoo hauv ntau daim ntawv thov. Cov neeg yuav khoom yuav tsum tau ceev faj txog cov khoom lag luam uas tus nqi qis dua li qhov nruab nrab ntawm kev ua lag luam, vim tias lawv yuav yog cov khoom tsis zoo lossis los ntawm cov khoom tsis muaj kev ntseeg siab.

Hauv cov ntsiab lus, cov tuam txhab lag luam tuaj yeem muab cov khoom lag luam HEC uas tsis tshua muaj nqi los ntawm kev siv cov khoom siv pheej yig dua, txhim kho cov txheej txheem tsim khoom, tsom mus rau qib qis viscosity, thiab siv cov txheej txheem tsim khoom kom zoo. Txawm li cas los xij, cov neeg yuav khoom yuav tsum paub txog cov khoom lag luam zoo thiab yuav tsum xaiv cov khoom uas ua tau raws li lawv cov kev xav tau tshwj xeeb thiab cov kev xav tau zoo.