Hydroxyethylulose (HEC) yog qhov tseem ceeb Polymer dav siv nyob rau hauv ntau yam kev lag luam, tshwj xeeb yog cov xim tsev, cov khoom siv pleev xim, cov khoom lag luam nplaum thiab cov khoom tu tus kheej. Ib qho ntawm nws cov peev txheej yog nws muaj peev xwm txhim kho cov qauv ua kom tsis kam sag, ua kom tiav thiab txawm siv.
Hydroxyethylulose (HEC) yog dej-soluble polymer muab tau los ntawm cellulose, lub ntuj polysaccharide pom nyob hauv cov phab ntsa cell. Nws cov qauv tshuaj tshwj xeeb cov qauv thiab cov khoom xyaw ntau yam hauv ntau daim ntawv thov kev lag luam. Ib qho tseem ceeb ntawm HEC yog nws lub peev xwm los txhim kho cov sag tiv thaiv ntau yam, uas yog lub luag haujlwm tseem ceeb hauv kev ua kom zoo thiab ua tau zoo ntawm cov khoom kawg. Hauv tsab xov xwm no, peb ua ib qhov tob tob ntawm cov khoom ntawm HEC, nws lub luag haujlwm tsim khoom, thiab nws lub luag haujlwm hauv txhim kho sag tsis kam nyob hauv ntau hom kev lag luam.
1. Cov qauv siv tshuaj lom neeg thiab cov khoom ntawm HEC:
HEC tau synthesized los ntawm etherified cellulose nrog ethylene oxide thiab kho nws nrog alkali. Tus txheej txheem no qhia txog cov pab pawg hydroxyethyl mus rau hauv lub cellulose cellebone, muab nws dej solubility thiab txhim kho nws cov tshuab nqus uas muaj aqueous. Cov qib ntawm kev hloov pauv (DS) txiav txim siab txog kev ua haujlwm ntawm cov solubule, yog li cuam tshuam rau cov solubility, yog li lwm yam khoom ntawm cov polymer. Tsis tas li ntawd, HC cov khoom ua pov thawj pseudopastic tus cwj pwm thiab nws viscosity txo qis nyob rau hauv shear kev nyuaj siab, yog li kev thov thiab sib xyaw ua ke.
2.Qhov txheej txheem tsim khoom:
The production process of HEC involves several steps such as cellulose source selection, ethylene oxide etherification, alkalization, purification and drying. Ntau yam tsis xws li cov tshuaj tiv thaiv kub, lub hauv paus lub sij hawm tau ua tib zoo tswj kom ua tiav cov qib xav tau kev hloov kho thiab hnyav. Lub resulting hec cov khoom yog ces ua kom huv si kom tshem tawm cov impurities thiab kom nws cov khoom zoo thiab ua tau zoo hauv cov ntawv thov.
3. Daim Ntawv Thov ntawm HEC:
Vim tias nws cov khoom muaj ntau zog thiab sib xyaw nrog cov tshuab dej-raws li, HEC tau dav siv hauv kev lag luam ntau yam. Nyob rau hauv cov xim thiab pleev xim kev lag luam, HEC yog siv los ua kev hloov kho rheology los txhim kho vaccosity tswj, theem siab thiab sag tiv taus cov qauv. Nws tseem siv nyob rau cov nplaum los ua kom tiav txoj hlua khi ua kom muaj zog, tawv thiab noo noo khaws cia. Tsis tas li ntawd, HEC yog ib qho khoom siv sib xyaw hauv cov khoom lag luam saib xyuas ntawm tus kheej xws li cov tshuaj zawv plaub hau, tshuaj pleev, thiab cov cream thiab ua kom ruaj khov, thiab zaj duab xis-ua cov khoom.
4. Qhov tseem ceeb ntawm kev tiv thaiv: Sag:
Sag kuj yog cov khoom tseem ceeb hauv cov qauv, tshwj xeeb tshaj yog hauv cov ntawv thov uas yog qhov chaw ruaj khov thiab kev sib txuam ntawm cov txheej txheem yog qhov tseem ceeb. Sagging tshwm sim thaum tus qauv tsis yog viscous txaus los txhawb nws qhov hnyav, ua rau kev faib khoom tsis sib xws thiab qhov tsis sib xws ntawm qhov chaw ntsug. Qhov kev tshwm sim no tuaj yeem ua rau cov khoom pov tseg, rov ua haujlwm thiab xiam qhov tseem ceeb ntawm sag tsis kam ua tiav thiab txheej txheej.
5.Txhob tus txheej txheem rau kev txhim kho Sag Kuj:
Lub txhim kho sag kam tiv taus HEC tuaj yeem yog ntaus nqi rau ntau lub tshuab. Ua ntej, HEC ua raws li cov tuab dua, nce viscosity ntawm cov qauv thiab muab kev txhawb nqa qauv kom tiv thaiv sagging. Thib ob, nws cov pseudo-yas tus cwj pwm ua rau nws yooj yim thov thiab theem thaum tswj cov viscosity txaus los tiv thaiv kev lom tom qab daim ntawv thov. Ib qho ntxiv, HEC ua cov qauv network nyob rau hauv cov qauv tsim, kho kom ruaj khov thiab tiv thaiv kev sib nqus. Ua ke, cov txheej txheem no pab txhim kho SAG RANSANCE, txhawm rau txheej thiab kev ua tau zoo ntawm cov khoom kawg.
Hydroxyethylulose (HEC) ua si lub luag haujlwm tseem ceeb hauv kev txhim kho sag kam rau ntau yam kev lag luam vim nws cov qauv tshuaj lom thiab cov khoom lag luam tshwj xeeb. Los ntawm nws lub peev xwm los ua pa viscosity, muab cov qauv kev txhawb nqa thiab tsim cov ntawv sau ruaj khov thiab qhov kawg hloov kho qhov zoo thiab ua haujlwm ntawm cov khoom kawg. Raws li kev lag luam txuas ntxiv thov cov txheej txheem kev ua tau zoo, cov khoom lag luam cov khoom lag luam thiab cov khoom lag luam zoo, qhov tseem ceeb tshaj plaws hauv cov qauv.
Lub Sijhawm Post: Feb-19-2025