Qhia txog cellulose ethers

01. Lub ntsiab daim ntawv thov ntawm cellulose ether HPMC?

HPMC yog dav siv nyob rau hauv kev tsim mortar, dej-raws li xim, hluavtaws cob, ceramics, tshuaj, zaub mov, textile, tshuaj pleev ib ce, luam yeeb, thiab lwm yam lag luam. Nws muab faib ua qib kev tsim kho, qib zaub mov, qib tshuaj, qib PVC qib thiab qib tshuaj txhua hnub.

02. Kev faib tawm ntawm cellulose yog dab tsi?

Feem ntau cov celluloses yog MC, HPMC, MHEC, CMC, HEC, EC
Ntawm lawv, HEC thiab CMC feem ntau yog siv rau hauv cov txheej txheem dej,
CMC kuj tuaj yeem siv rau hauv ceramics, roj teb, zaub mov thiab lwm yam
EC feem ntau yog siv rau hauv cov tshuaj, hluav taws xob nyiaj paste thiab lwm yam kev lag luam
HPMC tau muab faib ua ntau yam tshwj xeeb rau mortar, tshuaj, zaub mov, PVC kev lag luam, cov khoom siv tshuaj txhua hnub thiab lwm yam kev lag luam.

03. Qhov txawv ntawm HPMC thiab MHEC hauv daim ntawv thov yog dab tsi?

Cov khoom ntawm ob hom cellulose yog qhov zoo ib yam, tab sis qhov kub siab ruaj khov ntawm MHEC zoo dua, tshwj xeeb tshaj yog nyob rau lub caij ntuj sov thaum cov phab ntsa kub siab, thiab cov dej tuav ntawm MHEC zoo dua li ntawm HPMC nyob rau hauv qhov kub thiab txias. .

04. Yuav ua li cas txiav txim siab qhov zoo ntawm HPMC?

1) Txawm hais tias qhov dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias cov tshuaj ntxuav hniav dawb ntxiv rau hauv cov txheej txheem tsim khoom, qhov zoo yuav raug cuam tshuam, tab sis feem ntau ntawm cov khoom zoo muaj cov xim dawb, uas tuaj yeem txiav txim siab los ntawm cov tsos.
2) Lub teeb xa hluav taws xob: Tom qab dissolving HPMC hauv dej los tsim cov pob tshab colloid, saib nws lub teeb transmittance. Qhov zoo dua ntawm lub teeb xa hluav taws xob, qhov tsis muaj teeb meem tsawg dua, thiab qhov zoo yog qhov zoo.
Yog tias koj xav kom txiav txim siab qhov zoo ntawm cellulose, txoj kev txhim khu kev qha tshaj plaws yog siv cov cuab yeej tshaj lij hauv chav kuaj kev tshaj lij rau kev sim. Cov ntsuas ntsuas tseem ceeb suav nrog viscosity, dej tuav tus nqi, thiab cov hmoov tshauv.

05. Yuav ntsuas li casviscosity ntawm cellulose ether?

Cov viscometer feem ntau hauv kev lag luam hauv cellulose yog NDJ, tab sis nyob rau hauv kev ua lag luam thoob ntiaj teb, cov tuam txhab sib txawv feem ntau siv cov kev ntsuas viscosity sib txawv. Cov feem ntau yog Brookfeild RV, Hoppler, thiab tseem muaj cov kev daws teeb meem sib txawv, uas tau muab faib ua 1% tov thiab 2% tov. Cov viscometers sib txawv thiab ntau txoj kev tshawb nrhiav feem ntau ua rau muaj qhov sib txawv ntawm ob peb zaug lossis txawm tias kaum ob zaug hauv cov txiaj ntsig viscosity.

06. Qhov txawv ntawm HPMC hom instant thiab kub yaj hom yog dab tsi?

HPMC cov khoom tam sim no xa mus rau cov khoom uas tawg sai sai hauv dej txias, tab sis nws yuav tsum tau muab sau tseg tias dispersion tsis txhais hais tias dissolution. Cov khoom lag luam tam sim raug kho nrog glyoxal ntawm qhov chaw thiab dispersed hauv dej txias, tab sis lawv tsis pib yaj tam sim ntawd. , yog li cov viscosity tsis tsim tam sim tom qab dispersion. Qhov ntau dua qhov kev kho glyoxal saum npoo, qhov tawg sai dua, tab sis qhov viscosity qeeb qeeb, qhov me me ntawm glyoxal, thiab vice versa.

07. Compound cellulose thiab hloov cellulose
Tam sim no muaj ntau yam hloov kho cellulose thiab compound cellulose nyob rau hauv kev ua lag luam, yog li dab tsi yog kev hloov kho thiab compound?

Hom cellulose no feem ntau muaj cov khoom uas cov thawj cellulose tsis muaj los yog txhim kho qee yam ntawm nws cov khoom, xws li: kev tiv thaiv plam, txhim kho lub sij hawm qhib, nce scraping cheeb tsam los txhim kho kev tsim kho, thiab lwm yam. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias ntau lub tuam txhab. kuj siv Tus nqi pheej yig cellulose uas nws deev luag poj luag txiv thiaj li yuav txo tau tus nqi hu ua compound cellulose los yog hloov cellulose