Hydroxyethyl Cellulose Dissolution Method

Hydroxyethyl Cellulose (HEC) yog cov dej-soluble polymer feem ntau siv los ua cov thickener, emulsifier, stabilizer, thiab lwm yam.

Hydroxyethyl Cellulose Dissolution Cov kauj ruam

Npaj cov khoom siv thiab khoom siv:
Hydroxyethyl Cellulose hmoov
Solvent (feem ntau yog dej)
Cov khoom siv stirring (xws li mechanical stirrer)
Cov cuab yeej ntsuas ( ntsuas lub tog raj kheej, sib npaug, thiab lwm yam)
Thawv

Cua sov cov kuab tshuaj:
Txhawm rau kom ceev cov txheej txheem kev sib cais, cov kuab tshuaj tuaj yeem ua kom sov kom tsim nyog, tab sis feem ntau yuav tsum tsis txhob siab tshaj 50 ° C kom tsis txhob muaj qhov ua kom muaj thermal degradation. Dej kub ntawm 30 ° C thiab 50 ° C yog qhov zoo tagnrho.

Maj mam ntxiv HEC hmoov:
Maj mam sprinkle HEC hmoov rau hauv dej kub. Kom tsis txhob agglomeration, ntxiv nws los ntawm ib tug sieve los yog maj mam sprinkle nws. Nco ntsoov tias HEC hmoov yog sib npaug sib npaug thaum lub sijhawm nplawm.

Txuas ntxiv mus do:
Thaum lub sijhawm nplawm, txuas ntxiv maj mam ntxiv HEC hmoov kom ntseeg tau tias cov hmoov sib npaug hauv dej. Lub stirring ceev yuav tsum tsis txhob ceev heev los tiv thaiv npuas thiab agglomeration. Nruab nrab ceev stirring feem ntau pom zoo.

Standing dissolution: Tom qab ua tiav dispersion, nws yog feem ntau yuav tsum tau sawv ntsug rau ib lub sij hawm ntawm lub sij hawm (feem ntau ob peb teev los yog ntev dua) tso cai rau HEC kom yaj tag thiab tsim ib qho kev daws teeb meem. Lub sijhawm sawv ntsug yog nyob ntawm qhov hnyav molecular ntawm HEC thiab qhov concentration ntawm cov tshuaj.

Kho viscosity: Yog tias qhov viscosity yuav tsum tau kho, tus nqi ntawm HEC tuaj yeem tsim nyog nce lossis txo. Tsis tas li ntawd, nws kuj tuaj yeem hloov kho los ntawm kev ntxiv electrolytes, hloov pH tus nqi, thiab lwm yam.

Kev ceev faj hauv kev tawg

Tsis txhob agglomeration: Hydroxyethyl cellulose yog ib qho yooj yim rau agglomerate, yog li thaum ntxiv hmoov, them nyiaj tshwj xeeb rau tusyees sprinkle nws. Ib lub sieve lossis lwm yam khoom siv dispersing tuaj yeem siv los pab kom sib cais sib npaug.

Kev tswj qhov kub thiab txias: Qhov ntsuas kub hnyav yuav tsum tsis txhob siab dhau, txwv tsis pub nws yuav ua rau thermal degradation ntawm HEC thiab cuam tshuam rau kev ua haujlwm ntawm cov tshuaj. Nws yog feem ntau tsim nyog los tswj nws ntawm 30 ° C thiab 50 ° C.

Tiv thaiv kom tsis txhob muaj huab cua nkag mus: Tsis txhob nplawm nrawm heev kom tsis txhob muaj cua nkag mus rau hauv cov tshuaj los ua npuas. Cov npuas yuav cuam tshuam rau qhov sib xws thiab pob tshab ntawm cov tshuaj.

Xaiv cov khoom stirring txoj cai: Xaiv cov khoom stirring txoj cai raws li viscosity ntawm cov tshuaj. Rau cov kev daws teeb meem tsawg-viscosity, cov stirrers zoo tib yam tuaj yeem siv tau; Rau cov kev daws teeb meem siab viscosity, yuav tsum muaj lub zog stirrer.

Cia thiab khaws cia:
Cov tshuaj HEC yaj yuav tsum tau muab cia rau hauv lub thawv kaw kom tsis txhob ya raws los yog kis kab mob. Thaum khaws cia rau lub sijhawm ntev, tsis txhob tshav ntuj ncaj qha thiab qhov kub thiab txias ib puag ncig kom ntseeg tau tias muaj kev ruaj ntseg ntawm cov tshuaj.

Tej teeb meem thiab kev daws teeb meem
Kev tsis sib haum xeeb:
Yog tias tsis sib npaug tshwm sim, nws yuav yog vim tias cov hmoov yog nplawm sai dhau los yog nplawm tsis txaus. Cov tshuaj yog los txhim kho lub uniformity ntawm stirring, nce lub sij hawm stirring, los yog kho qhov ceev ntawm hmoov ntxiv thaum stirring.

Bubble tiam:
Yog hais tias muaj coob tus npuas tshwm nyob rau hauv cov tshuaj, cov npuas yuav txo tau los ntawm kev ua kom qeeb ntawm stirring ceev los yog cia nws sawv ntsug ntev. Rau cov npuas uas twb tau tsim lawm, tus neeg sawv cev degassing tuaj yeem siv los yog kev kho ultrasonic tuaj yeem siv los tshem tawm lawv.

Kev daws viscosity siab dhau lossis qis dhau:
Thaum cov tshuaj viscosity tsis ua raws li qhov yuav tsum tau ua, nws tuaj yeem tswj tau los ntawm kev kho tus nqi ntawm HEC. Tsis tas li ntawd, kev kho tus nqi pH thiab lub zog ionic ntawm cov tshuaj tuaj yeem cuam tshuam rau viscosity.

Koj tuaj yeem yaj hydroxyethyl cellulose zoo thiab tau txais cov tshuaj zoo ib yam thiab ruaj khov. Mastering cov kauj ruam ua haujlwm kom raug thiab ceev faj tuaj yeem ua rau muaj txiaj ntsig zoo ntawm hydroxyethyl cellulose hauv ntau daim ntawv thov.