Lub luag haujlwm ntawm cov viscosity sib txawv hydroxyethyl cellulose (HEC) hauv cov xim latex

Hydroxyethyl Cellulose (HEC)yog ib qho cellulose ether uas tsis yog ionic feem ntau siv rau hauv cov xim pleev xim uas siv dej. Ua ib qho tseem ceeb uas ua rau tuab, tus neeg sawv cev khaws dej thiab tus neeg sawv cev ncua, HEC ua lub luag haujlwm tseem ceeb hauv kev tsim thiab siv cov xim latex. Cov yam ntxwv viscosity ntawm HEC cuam tshuam ncaj qha rau kev ua haujlwm ntawm kev tsim kho, kev ua haujlwm ntawm txheej thiab cov xim pleev xim zoo ntawm cov xim latex.

1. Cov haujlwm tseem ceeb ntawm hydroxyethyl cellulose

HEC muaj cov haujlwm hauv qab no hauv cov xim latex:

Cov nyhuv ua kom tuab: Los ntawm kev ua kom lub cev viscosity ntawm cov xim latex nce ntxiv, qhov rheology ntawm cov xim tau txhim kho, ua rau nws yooj yim dua los tswj thaum lub sijhawm tsim kho.

Tiv thaiv kev sagging: Ua kom cov xim pleev xim thixotropy ntau dua kom tiv thaiv kev sag thiab sagging.

Txhim kho kev tsim kho: Txhim kho qhov du ntawm kev txhuam, dov lossis txau.

Txhim kho kev ruaj khov: Txhim kho qhov kev ncua ntawm cov xim thiab cov khoom sau kom tiv thaiv kev tso dej thiab kev faib ua pawg.

Kev ncua kev ziab: Pab txhim kho qhov tsim ntawm zaj duab xis, qhov ceev thiab qhov tiaj tus ntawm zaj duab xis xim.

2. Kev faib tawm ntawm HEC nrog ntau yam viscosities

HEC muab faib ua peb pawg raws li qhov viscosity ntawm nws cov kua dej ntawm qhov concentration tshwj xeeb: viscosity qis, viscosity nruab nrab thiab viscosity siab. Nws feem ntau yog qhov sib txawv los ntawm viscosity ntawm 2% aqueous kua (mPa · s):

HEC viscosity qis: 100-5,000 mPa·s

Qhov nruab nrab viscosity HEC: 5,000-30,000 mPa·s

HEC viscosity siab: 30,000-100,000 mPa·s lossis siab dua

3. Kev sib piv ntawm cov teebmeem ntawm daim ntawv thov ntawm HEC nrog cov viscosities sib txawv hauv cov xim latex

3.1. Cov yam ntxwv ntawm daim ntawv thov ntawm HEC viscosity qis

Qhov zoo: kev sib kis zoo, kev yaj sai, thiab kev pom tseeb ntawm lub kaw lus.

Cov xwm txheej siv tau: Haum rau cov chaw tsim kho uas xav tau viscosity qis thiab qib zoo, xws li cov xim latex hom tsuag.

Cov Kev Txwv: Lub peev xwm ua kom tuab tsis muaj zog, tej zaum yuav poob thaum lub sijhawm tsim kho, thiab kev pab tsawg hauv kev tiv thaiv kom tsis txhob muaj nag los.

3.2. Cov yam ntxwv ntawm daim ntawv thov ntawm HEC viscosity nruab nrab

Qhov Zoo: Xav txog ob qho tib si thickening thiab fluidity, nruab nrab thixotropy, thiab tuaj yeem ua tau raws li qhov xav tau ntawm ntau txoj kev tsim kho.

Cov xwm txheej siv tau: Siv dav hauv cov xim pleev xim rau phab ntsa, tsim nyog rau txhuam thiab dov.

Kev Ua Tau Zoo: Muaj peev xwm tswj tau qhov sagging, thaum ua kom cov xim pleev xim tiaj tus thiab sib xws.

3.3. Cov yam ntxwv ntawm daim ntawv thov ntawm cov viscosity siab HEC

Cov Zoo: Muaj peev xwm ua kom tuab zoo heev, ua rau cov xim zoo tiv thaiv kev poob qis thiab ruaj khov.

Cov xwm txheej siv tau: Haum rau cov xim tuab, xim pleev xim latex sab nraud ntawm phab ntsa lossis cov sijhawm uas muaj cov kev xav tau siab rau kev tiv thaiv kev qaug zog.

Lus Cim: HEC uas muaj viscosity siab muaj lub sijhawm yaj ntev thiab yooj yim los ua cov pob. Yuav tsum tau them sai sai rau kev tswj hwm ua ntej kev tawg thiab kev tawg ceev; tib lub sijhawm, viscosity siab yuav cuam tshuam me ntsis rau kev tsim kho.

4. Cov lus qhia xaiv thiab kev ua kom zoo dua ntawm cov mis

Hauv kev tsim cov mis xim latex, qhov kev xaiv viscosity ntawm HEC yuav tsum xav txog cov hauv qab no:

Txoj kev tsim kho: Kev txau muab qhov tseem ceeb rau cov khoom uas muaj viscosity tsawg, thiab kev txhuam thiab dov tuaj yeem siv cov viscosity nruab nrab thiab siab.

Hom xim: Qhov nruab nrab viscosity tuaj yeem siv rau xim phab ntsa sab hauv; viscosity siab yuav tsum tau xaiv rau xim phab ntsa sab nraud thiab xim tuab.

Kev ruaj khov ntawm kev khaws cia: HEC viscosity siab zoo dua rau kev tiv thaiv kev tawg thiab kev tawg.

Huab cua ib puag ncig: Hauv qhov chaw qhuav, HEC viscosity siab tuaj yeem muab dej zoo dua.

Qee zaum kev sib npaug ntawm kev ua tau zoo tuaj yeem ua tiav los ntawm kev sib xyaw ua ke HECs ntawm ntau yam viscosities. Piv txwv li, ib feem me me ntawm cov viscosity qis thiab feem ntau ntawm cov khoom viscosity nruab nrab raug ntxiv rau cov xim latex kom txhim kho kev tsim kho thiab thixotropy.

Cov teebmeem ntawm daim ntawv thovhydroxyethyl cellulose ntawm ntau yam viscosities hauv latex mobt muaj ntau lub hom phiaj sib txawv. Kev xaiv thiab kev tsim qauv tshawb fawb tsis tsuas yog txhim kho kev ua tau zoo ntawm cov xim pleev xwb, tab sis kuj ua kom zoo dua qhov kev paub ntawm tus neeg siv thiab kev ua tau zoo ntawm cov khoom. Cov chaw tsim xim pleev yuav tsum muab cov xwm txheej thov tshwj xeeb nrog kev thov ua lag luam thiab ua qhov kev xaiv tsim nyog kom ua tiav qhov zoo tshaj plaws ntawm HEC.