Qhov huv ntawm hydroxypropyl methylcellulose hauv cov hmoov av rwb thaiv tsev thiab cov hmoov putty cuam tshuam ncaj qha rau qhov zoo ntawm kev tsim kho vaj tse, yog li dab tsi yog cov yam ntxwv uas cuam tshuam rau qhov huv ntawm hydroxypropyl methylcellulose? Cia kuv teb cov lus nug no rau koj.
Hauv cov txheej txheem tsim khoom ntawm hydroxypropyl methylcellulose, cov pa oxygen seem hauv lub reactor yuav ua rau qhov kev puas tsuaj ntawm hydroxypropyl methylcellulose thiab txo qhov hnyav molecular, tab sis cov pa oxygen seem yog txwv, tsuav yog nws tsis nyuaj heev rau rov txuas cov molecules tawg. Qhov tseem ceeb tshaj plaws ntawm cov dej saturation muaj ntau yam ua nrog cov ntsiab lus ntawm hydroxypropyl. Qee lub Hoobkas tsuas yog xav txo tus nqi thiab tus nqi, tab sis tsis xav kom nce cov ntsiab lus ntawm hydroxypropyl, yog li qhov zoo tsis tuaj yeem ncav cuag qib ntawm cov khoom txawv teb chaws zoo sib xws.
Tus nqi khaws dej ntawm hydroxypropyl methylcellulose kuj muaj kev sib raug zoo nrog hydroxypropyl, thiab rau tag nrho cov txheej txheem tshuaj tiv thaiv, hydroxypropyl kuj txiav txim siab tus nqi khaws dej ntawm hydroxypropyl methylcellulose. Cov nyhuv ntawm alkalization, qhov piv ntawm methyl chloride thiab propylene oxide, qhov concentration ntawm alkali thiab qhov piv ntawm dej rau paj rwb refined tag nrho txiav txim siab qhov kev ua tau zoo ntawm cov khoom.
Qhov zoo ntawm cov khoom siv raw, qhov cuam tshuam ntawm alkalization, qhov sib piv ntawm cov txheej txheem, qhov sib piv ntawm cov kuab tshuaj thiab qhov cuam tshuam ntawm neutralization txhua yam txiav txim siab qhov zoo ntawm hydroxypropyl methylcellulose, thiab qee qhov hydroxypropyl methylcellulose yog ua kom yaj Tom qab ntawd, nws yog cloudy zoo li ntxiv mis nyuj, qee qhov yog milky dawb, qee qhov yog daj, thiab qee qhov yog pob tshab thiab pob tshab. Yog tias koj xav daws nws, kho los ntawm cov ntsiab lus saum toj no. Qee zaum acetic acid tuaj yeem cuam tshuam loj heev rau lub teeb transmittance. Nws yog qhov zoo tshaj plaws los siv acetic acid tom qab dilution. Qhov cuam tshuam loj tshaj plaws yog seb qhov tshuaj tiv thaiv puas tau do sib npaug thiab seb qhov sib piv ntawm lub kaw lus puas ruaj khov (qee cov ntaub ntawv muaj dej noo thiab cov ntsiab lus tsis ruaj khov, xws li rov ua dua cov kuab tshuaj). Qhov tseeb, Muaj ntau yam tseem ceeb ua si. Nrog rau kev ruaj khov ntawm cov khoom siv thiab kev ua haujlwm ntawm cov neeg ua haujlwm tau kawm zoo, cov khoom tsim tawm yuav tsum ruaj khov heev. Lub teeb transmittance yuav tsis tshaj qhov ntau ntawm ± 2%, thiab qhov sib npaug ntawm cov pab pawg hloov pauv yuav tsum tau tswj hwm zoo. Hloov chaw ntawm kev sib npaug, lub teeb transmittance yuav zoo heev.
Lub sijhawm tshaj tawm: Tsib Hlis-30-2023