Putty hmoov feem ntau yog tsim los ntawm cov khoom siv ua yeeb yaj kiab (cov ntaub ntawv sib txuas), cov khoom ntim, cov dej khaws cia, cov thickeners, defoamers, thiab lwm yam. Cov organic chemical raw cov ntaub ntawv hauv putty hmoov feem ntau muaj xws li: cellulose, pregelatinized starch, starch ether, polyvinyl cawv, dispersible latex hmoov, thiab lwm yam. Hauv qab no, Polycat ntawm raw cov ntaub ntawv siv rau ntau yam kev siv.
Fiber ntau:
Fiber (Asmeskas: Fiber; Lus Askiv: Fiber) yog hais txog ib yam khoom uas tsim los ntawm cov filaments tsis tu ncua. Xws li cog fiber ntau, tsiaj plaub hau, silk fiber, hluavtaws fiber, thiab lwm yam.
Cellulose:
Cellulose yog macromolecular polysaccharide uas tsim los ntawm cov piam thaj thiab yog cov khoom tseem ceeb ntawm cov phab ntsa ntawm cov nroj tsuag. Nyob rau hauv chav tsev kub, cellulose tsis soluble nyob rau hauv dej los yog nyob rau hauv cov organic solvents. Cov ntsiab lus cellulose ntawm paj rwb yog ze rau 100%, ua rau nws yog qhov ntshiab tshaj plaws ntawm cellulose. Hauv cov ntoo, cellulose suav txog 40-50%, thiab muaj 10-30% hemicellulose thiab 20-30% lignin.
Qhov txawv ntawm cellulose (txoj cai) thiab starch (sab laug):
Feem ntau hais lus, ob qho tib si hmoov txhuv nplej siab thiab cellulose yog macromolecular polysaccharides, thiab cov mis molecular tuaj yeem qhia tau tias yog (C6H10O5) n. Qhov hnyav molecular ntawm cellulose loj dua cov hmoov txhuv nplej siab, thiab cellulose tuaj yeem decomposed los tsim cov hmoov txhuv nplej siab. Cellulose yog D-glucose thiab β-1,4 glycoside Macromolecular polysaccharides tsim los ntawm cov ntawv cog lus, thaum cov hmoov txhuv nplej siab yog tsim los ntawm α-1,4 glycosidic bonds. Cellulose feem ntau tsis muaj ceg, tab sis cov hmoov txhuv nplej siab yog branched los ntawm 1,6 glycosidic bonds. Cellulose tsis zoo soluble hauv dej, thaum starch yog soluble hauv dej kub. Cellulose yog insensitive rau amylase thiab tsis tig xiav thaum raug iodine.
Cellulose Ether:
Lub npe Askiv ntawmcellulose etheryog cellulose ether, uas yog ib tug polymer compound nrog ether qauv ua los ntawm cellulose. Nws yog cov khoom ntawm cov tshuaj tiv thaiv ntawm cellulose (cog) nrog etherification tus neeg sawv cev. Raws li cov qauv tshuaj cais tawm ntawm cov khoom hloov tom qab etherification, nws tuaj yeem muab faib ua anionic, cationic thiab nonionic ethers. Raws li tus neeg sawv cev etherification siv, muaj methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cyanoethyl cellulose, benzyl cyanoethyl cellulose, carboxymethyl cellulose thiab carboxymethyl cellulose, thiab lwm yam. Hauv kev tsim kho, cellulose ether tseem hu ua cellulose, uas yog lub npe tsis raug, thiab nws yog hu ua cellulose (los yog ether) kom raug.
Thickening Mechanism ntawm Cellulose Ether Thickener:
Cellulose ether thickeners yog non-ionic thickeners uas thicken tsuas yog los ntawm hydration thiab entanglement ntawm molecules.
Lub polymer saw ntawm cellulose ether yog ib qho yooj yim los tsim hydrogen daim ntawv cog lus nrog dej nyob rau hauv dej, thiab cov hydrogen daim ntawv cog lus ua rau nws muaj siab hydration thiab inter-molecular entanglement.
Thaum lubcellulose etherthickener yog ntxiv rau cov xim latex, nws absorbs dej ntau, ua rau nws tus kheej ntim kom nthuav dav, txo qhov chaw dawb rau cov xim, cov fillers thiab cov khoom latex;
Nyob rau tib lub sijhawm, cov cellulose ether molecular chains yog intertwined los tsim ib tug peb-dimensional network qauv, thiab cov pigments, fillers thiab latex hais nyob ib ncig ntawm nyob rau hauv nruab nrab ntawm lub mesh thiab tsis tuaj yeem ntws dawb do.
Raws li ob qho kev cuam tshuam no, viscosity ntawm lub kaw lus tau txhim kho! Ua tiav cov nyhuv thickening peb xav tau!
Lub sij hawm xa tuaj: Plaub Hlis-28-2024