Cov zaub mov ntawm cov zaub mov muaj pes tsawg ntawm cellulose ether?

DESCRIBE:

Cov khoom noj khoom haus muaj cov khoom noj muaj cov neeg ua haujlwm ntawm cellulose

TECHNICAL FARD:

Tam sim no kev tsim muaj cuam tshuam rau cov khoom noj muaj cov khoom noj muaj cov neeg ua haujlwm cellulose.

Cov txheej txheem keeb kwm yav dhau los:

Nws tau paub ntev tau los koom tes ua cov khoom noj khoom haus, tshwj xeeb tshaj yog cov khoom noj khoom haus xws li ua kom khov kho thaum tsim khoom, lossis ua tiav kev sib cais lossis ua tiav. British patent Thov GB 2 444 020 qhia tawm cov zaub mov tsis muaj zaub mov xws li methylcellulose, hydroxyprropyl cellulose, lossis hydroxypropylulose. Methylcellulose thiab hydroxypropyf methylcellose muaj "Thermos reversible gelling cov khoom". Nws yog tshwj xeeb tau piav qhia tias thaum muaj methylcellulose lossis hydroxypropylulose pawg nyob hauv cov molecule undergoes lub cev qhuav dej, thiab nws dhau los ua ib qho gel aqueous. Ntawm qhov tod tes, thaum lub txiaj ntsig tau txias txias, cov pab pawg hydrophobic methhoxy pawg yog cov gel rov qab rau cov kev daws teeb meem qub.

Patent Equay European Pen I 111 471 Kev qhia tawm methylcelloses uas yog qhov muaj txiaj ntsig zoo ntawm cov khoom noj khoom haus, nqaij, thiab taum pauv ua rau nws muaj zog ntxiv. Lub methylcellulose muab kev txhim kho cov zaub mov ruaj khov, yog li muab cov khoom noj zoo rau cov neeg siv khoom noj cov zaub mov tiav. Thaum yaj nyob rau hauv dej txias (piv txwv li, 5 ° C lossis qis dua) ua ntej muaj cov khoom xyaw ua ntej, cov khoom xyaw me me los muab cov zaub mov muaj zog nrog cov khoom noj zoo thiab sib xyaw. muaj peev xwm.

Txawm li cas los xij, qee kis, siv cov dej txias yog qhov tsis yooj yim rau cov neeg tsim khoom ntawm cov zaub mov muaj pes tsawg leeg. Raws li, nws yuav tsim nyog los muab cov khoom siv hauv cellulose uas muab cov khoom noj muaj zog nrog cov khoom siv zoo thiab cohesion txawm tias cov neeg muaj kev hais ua ke tau yaj nyob rau hauv chav tsev.

Hydroxylal methylcellose xws li hydroxypropyl methylulose (uas tseem muaj txiaj ntsig zoo hauv cov khoom noj khoom haus sib piv piv rau methylcellulose. Hydroxylal methylcelluloses nthuav qhia cov khoom siv qis qis cia modulus tsis tsim cov gels muaj zog. Cov kev muaj zog loj yog qhov yuav tsum tau ua rau muaj txiaj ntsig tsis muaj zog (Haque, A; MJ thiab Morris, A thiab Morris, Er1Carbohydrate polymers22 (1993) P.161).

Thaum hydroxyalkyl methylcelluloses xws li hydroxypropylulose (uas nthuav tawm cov zaub mov qis dua (lawv lub hardness thiab cohesion tsis txaus rau qee cov ntawv thov.

Nws yog ib qho khoom ntawm tam sim no tsim los muab HydroxyPlcellulose, xws li hydroxyprcellulose, uas yog muab cov zaub mov hydroxelluloses, uas yog muab cov khoom noj muaj txiaj ntsig zoo nkauj thiab / lossis cohesion.

Ib qho khoom uas nyiam tshaj plaws ntawm kev tsim muaj tam sim no yog muab HydroxyPalchlulose, tshwj xeeb yog cov khoom noj khoom haus zoo ib yam yog qhov tseeb thaum yaj hauv dej sov.

Kuj ceeb tias, nws tau pom tias hydroxyalkyl methylcellulose, tshwj xeeb yog hydroxypropylulose, paub cov zaub mov muaj zog muaj ntau dua thiab / lossis cohesion.

Kuj tseem ceeb, nws tau pom tias qee yam hydroxyflcelluloses, tsis tas yuav yaj hauv dej txias kom muab cov zaub mov txias nrog cov khoom noj muaj zog thiab / lossis cohesion.