Hydroxyethyl Cellulose (HEC) yog non-ionic dej-soluble polymer dav siv nyob rau hauv coatings, tshuaj pleev ib ce, tshuaj, zaub mov, papermaking, roj drilling thiab lwm yam kev lag luam teb. Nws yog cellulose ether compound tau los ntawm etherification ntawm cellulose, nyob rau hauv uas hydroxyethyl hloov ib feem ntawm hydroxyl pawg ntawm cellulose. Lub cev thiab tshuaj lom neeg cov khoom ntawm hydroxyethyl cellulose ua rau nws yog ib qho tseem ceeb ntawm cov thickeners, gelling agents, emulsifiers thiab stabilizers.
Boiling point ntawm hydroxyethyl cellulose
Hydroxyethyl cellulose yog lub siab molecular polymer nrog qhov hnyav molecular, thiab nws cov ntsiab lus kub kub tsis yooj yim los txiav txim siab raws li cov khoom me me molecular. Hauv kev siv cov tswv yim, cov khoom siv molecular siab xws li hydroxyethyl cellulose tsis muaj qhov dej ntshiab. Yog vim li cas yog tias cov tshuaj no yuav decompose thaum lub sij hawm cua sov, es tsis yog ncaj qha transforming ntawm cov kua rau roj los ntawm theem hloov zoo li cov khoom me me molecular. Yog li ntawd, lub tswv yim ntawm "boiling point" ntawm hydroxyethyl cellulose tsis siv tau.
Feem ntau, thaum hydroxyethyl cellulose rhuab ntawm qhov kub siab, nws yuav xub yaj hauv dej los yog cov kuab tshuaj organic los tsim cov tshuaj colloidal, thiab tom qab ntawd ntawm qhov kub siab dua, cov saw hlau polymer yuav pib tawg thiab nws thiaj li thermally decompose, tso me me molecules xws li dej, carbon dioxide thiab lwm yam volatile yam tsis tau mus rau ib tug raug boiling txheej txheem. Yog li ntawd, hydroxyethyl cellulose tsis muaj qhov kub hnyiab, tab sis qhov kub thiab txias decomposition, uas txawv nrog nws qhov hnyav molecular thiab qib ntawm kev hloov pauv. Feem ntau hais lus, lub thermal decomposition kub ntawm hydroxyethyl cellulose feem ntau yog siab dua 200 ° C.
Thermal stability ntawm hydroxyethyl cellulose
Hydroxyethyl cellulose muaj tshuaj lom neeg ruaj khov nyob rau hauv chav tsev kub, tuaj yeem tiv taus qee yam ntawm cov kua qaub thiab alkali ib puag ncig, thiab muaj qee qhov kub tsis kam. Txawm li cas los xij, thaum qhov kub thiab txias heev, tshwj xeeb tshaj yog thaum tsis muaj cov kuab tshuaj lossis lwm yam stabilizers, cov saw hlau polymer yuav pib tawg vim qhov kev ua ntawm tshav kub. Cov txheej txheem thermal decomposition no tsis yog nrog rau qhov ua kom pom tseeb, tab sis yog cov saw hlau tawg zuj zus thiab lub cev qhuav dej, tso cov khoom tsis zoo thiab thaum kawg tawm hauv cov khoom carbonized.
Hauv cov ntawv thov kev lag luam, txhawm rau kom tsis txhob decomposition tshwm sim los ntawm qhov kub siab, hydroxyethyl cellulose feem ntau tsis raug rau ib puag ncig tshaj nws qhov kub decomposition. Txawm tias nyob rau hauv cov ntawv thov kub (xws li kev siv cov roj av drilling kua), hydroxyethyl cellulose feem ntau yog siv ua ke nrog lwm cov ntaub ntawv los txhim kho nws cov thermal stability.
Kev siv ntawm hydroxyethyl cellulose
Txawm hais tias hydroxyethyl cellulose tsis muaj qhov kub hnyiab, nws cov solubility thiab thickening zog ua rau nws siv dav hauv ntau lub lag luam. Piv txwv li:
Txheej kev lag luam: hydroxyethyl cellulose tuaj yeem siv los ua cov thickener los pab kho rheology ntawm txheej txheej, tiv thaiv nag lossis daus thiab txhim kho qib thiab ruaj khov ntawm txheej.
Tshuaj pleev ib ce thiab tshuaj txhua hnub: Nws yog ib qho tseem ceeb muaj nyob rau hauv ntau cov tshuaj ntxuav tes, cov khoom tu tawv nqaij, tshuaj zawv plaub hau thiab tshuaj txhuam hniav, uas tuaj yeem muab cov khoom zoo viscosity, moisturizing thiab stability.
Kev lag luam kws tshuaj: Hauv kev npaj tshuaj, hydroxyethyl cellulose feem ntau yog siv los tsim cov ntsiav tshuaj thiab cov txheej txheem los tswj cov tshuaj tso tawm.
Khoom noj khoom haus kev lag luam: Raws li ib tug thickener, stabilizer thiab emulsifier, hydroxyethyl cellulose kuj siv nyob rau hauv cov zaub mov, tshwj xeeb tshaj yog nyob rau hauv ice cream, jelly thiab sauces.
Cov roj drilling: Hauv cov roj av drilling, hydroxyethyl cellulose yog ib qho tseem ceeb ntawm cov kua dej drilling, uas tuaj yeem ua rau cov kua viscosity nce ntxiv, txhim kho cov phab ntsa zoo thiab txo cov av nkos.
Raws li cov khoom siv polymer, hydroxyethyl cellulose tsis muaj qhov kub hnyiab vim nws decomposes ntawm qhov kub thiab txias es tsis txhob muaj qhov tshwm sim ntawm qhov kub. Nws cov thermal decomposition kub feem ntau yog siab dua 200 ° C, nyob ntawm nws qhov hnyav molecular thiab qib hloov pauv. Txawm li cas los xij, hydroxyethyl cellulose yog siv dav hauv txheej txheej, tshuaj pleev ib ce, tshuaj, khoom noj thiab roj av vim nws cov thickening zoo heev, gelling, emulsifying thiab stabilizing zog. Hauv cov ntawv thov no, nws feem ntau zam kom tsis txhob raug kub hnyiab ntau dhau los ua kom nws qhov kev ua tau zoo thiab ruaj khov.
Post lub sij hawm: Oct-23-2024