Dej khaws cia ntawm hydroxypropyl methylcellulose ether
Cov dej ua kom tiav ntawm qhuav alp collhip hais txog kev muaj peev xwm ntawm collel los tuav thiab xauv dej. Lub viscosity ntau dua ntawm hydroxypropyl methylculose ether, qhov zoo dua cov dej khaws cia. Vim tias cov qauv cellulose muaj cov pab pawg hydroxyles los tsim cov dej lwg hydrogen ntawm cov dej hauv hydroxules, yog li cov dej dawb ua ke, yog li ua lub luag haujlwm hauv dej tuav cia.
Solubility ntawm hydroxypropy methyl cellulose ether
1. Cov coarsle cellulose ether yog yooj yim rau tawg hauv dej yam tsis muaj agglomeration, tab sis kev sib cais yog qeeb heev. Cellulose ether hauv qab no 60 mesh yog yaj hauv dej li 60 feeb.
2. Zoo cellulose cellulose ether yog yooj yim rau tawg hauv dej yam tsis muaj agglomeration, thiab kev sib cais yog qhov sib cais. Cellulose ether saum toj saud 80 mesh yog yaj hauv dej li 3 feeb.
3. Ultra-nplua cov cellulose cellulose ether disperses sai sai hauv dej, yaj tawm sai sai, thiab ua viscosity sai heev. Cellulose ether saum toj no 120 mesh yaj nyob rau hauv dej rau txog 10-30 vib nas this.
Tus finer cov lus ntawm hydroxypropyl methylculose ether, qhov zoo dua cov dej khaws cia. Qhov saum npoo ntawm coarse-grained cellulose ether dissolves tam sim ntawd tom qab kev hu rau dej thiab ua cov kua kab gel. Cov kua nplaum qhwv cov khoom kom tiv thaiv cov lwg roj los ntawm kev nkag mus rau qhov nkag mus. Qee lub sij hawm nws tsis tuaj yeem sib txawv dispersed thiab yaj txawm tias tom qab lub sij hawm ntev plhaw, sib sau cov huab nrog cov huab lossis agglomeration. Cov khoom zoo txawv txav thiab yaj sai sai tom qab hu rau dej los ua cov viscosity tsis zoo.
PH tus nqi ntawm hydroxypropyl methylcellulose ether (retarding los yog thaum ntxov muaj zog)
Tus lej pH ntawm hydroxypropyl ntawm etherers ether cov neeg nyob hauv tsev thiab txawv teb chaws yog nyob rau hauv ib lub xeev acidic. Vim tias tseem muaj ntau tus ntawm cov qauv hluav taws xob ntau ntawm cov qauv molecular ntawm cov nplhaib molecular ntawm lub nplhaib ether, lub pob zeb anhydruced yog cov pab pawg tseem ceeb uas ua kom lub ce sait. Lub cim anhydoglucose tuaj yeem ua cov calcium i ion concecation lub sij hawm casas hydroxide thiab calcium ntsev muaju, thiab ncua kev hydration ntawm cement. txheej txheem. Yog tias tus nqi PH yog nyob rau hauv lub xeev Alkaline, lub tshuaj khib yuav tshwm sim thaum ntxov lub xeev. Tam sim no feem ntau cov khoom siv siv sodium carbonate los kho tus nqi PH. Sodium carbonate yog ib hom neeg sawv cev nrawm. Sodium carbonate txhim kho cov kev ua tau zoo ntawm cov xis mas hais tawm ntawm cov cohesion, thiab ntxiv txhim kho cov viscosity ntawm cug. Nyob rau tib lub sijhawm, sodium carbonate sai sai ua ke nrog calcium sai sai sai sai sai sai no los txhawb kev tsim ntawm ettringite, thiab cov xis mas coagulates sai. Yog li ntawd, tus nqi PH yuav tsum tau hloov kho raws li cov neeg siv sib txawv hauv cov txheej txheem ntau lawm.
Huab cua Entraining cov khoom ntawm hydroxypropyl methyl cellulose ether
Cov huab cua-nkag tau cov nyhuv ntawm hydroxypropyl metylcellulose ether tsuas yog vim cellulose ether kuj yog hom ntawm surfactant. Qhov kev cuam tshuam interfacial ntawm cellulose ether feem ntau tshwm sim ntawm cov kua roj-cov khoom sib tshuam. Ua ntej, kev qhia ntawm huab cua npuas, ua raws los ntawm kev tawg thiab ntub dej. Cellulose ether muaj cov pab pawg alkyl, uas muaj ntau pawg ntawm cov dej sib xyaw, ua kom muaj ntau lub zog kaw me me thaum lub sijhawm daws teeb meem.
Gel cov khoom ntawm hydroxypropyl methyl cellulose ether
Tom qab hydroxypropyl minylcellulose ether yog yaj nyob rau hauv cov kab hlau yuav tshwm sim nrog cov nplais me me los ua tus pleev xim ua kom zoo nkauj thiab sau rau hauv curse cug veg. , txhim kho lub compactness ntawm cug tshuaj tua, ua si lub luag haujlwm ntawm kev hloov pauv tau thiab ntxiv lub zog. Txawm li cas los xij, thaum lub composite matrix yog qhov kev nyuaj siab, lub zog polymer tsis tuaj yeem ua rau lub luag haujlwm tsis sib xws, yog li lub zog thiab folding piv ntawm cov tshuaj khib qis dua.
Zaj duab xis tsim ntawm Hydroxypropyl Methyl cellulose ether
Tom qab HydroxyPropy cellulose cellulose cellulose cellulose yog ntxiv rau kev haus dej, ib qho nyias nyias daim duab zaj duab xis yog tsim ntawm cov movas hais. Zaj duab xis no muaj cov nyhuv sib khi thiab txhim kho lub npoo dryness ntawm lub cug. Vim tias cov dej zoo khaws cia ntawm hydroxypropylulphulcellulose ete lub zog, txhim kho lub zog ntawm lub tshuaj khib, thiab tib lub sijhawm nws Txhim kho cov cohesion ntawm lub tshuaj khib, ua rau lub tshuaj khib nyiab muaj zoo thiab yoog tau zoo, thiab txo cov shrinkage thiab deformation ntawm lub cug.
Lub Sijhawm Post: Lub Tsib Hlis-23-2023