01 Thickener
tuab:Tom qab yaj los yog dispersed hauv dej, nws tuaj yeem ua rau kom cov viscosity ntawm cov kua thiab ua kom muaj qhov ruaj khov hydrophilic polymer compound hauv lub cev. Cov qauv molecular muaj ntau pawg hydrophilic, xws li -0H, -NH2, -C00H, -COO, thiab lwm yam, uas muaj peev xwm hydrate nrog dej molecules los tsim ib tug high-viscosity macromolecular kua. Thickeners ua lub luag haujlwm tseem ceeb hauv cov tshuaj pleev ib ce, nrog thickening, emulsifying, suspending, stabilizing thiab lwm yam haujlwm.
02 Thickener action txoj cai
Txij li thaum cov pab pawg ua haujlwm ntawm cov saw hlau polymer feem ntau tsis yog ib leeg, cov txheej txheem thickening feem ntau yog tias ib qho thickener muaj ob peb lub tshuab thickening.
Chain winding thickening： Tom qab cov polymer muab tso rau hauv cov kuab tshuaj, cov saw hlau polymer yog curled thiab entangled nrog ib leeg. Lub sijhawm no, viscosity ntawm cov tshuaj nce ntxiv. Tom qab neutralization nrog alkali lossis organic amine, tus nqi tsis zoo muaj cov dej solubility muaj zog, uas ua rau cov saw hlau polymer yooj yim nthuav dav, yog li ua tiav qhov nce hauv viscosity. .
Covalently cross-linked thickening： Covalent crosslinking yog lub sij hawm embedding ntawm bifunctional monomers uas tuaj yeem hnov mob nrog ob lub polymer chains, txuas ob lub polymers ua ke, hloov pauv cov khoom ntawm cov polymer, thiab muaj peev xwm tshem tawm qee yam tom qab yaj hauv dej.
Association thickening： Nws yog ib hom hydrophobic dej-soluble polymer, uas muaj cov yam ntxwv ntawm ib hom surfactant. Lub concentration ntawm cov polymer nyob rau hauv dej tsub kom lub koom haum ntawm molecules, thiab interacts nrog cov hydrophobic pab pawg neeg ntawm cov polymer nyob rau hauv lub xub ntiag ntawm surfactant, yog li tsim ib tug nto active Mixed micelles ntawm tus neeg sawv cev thiab polymer hydrophobic pawg, yog li ua kom cov tshuaj viscosity.
03 Classification ntawm thickeners
Raws li dej solubility, nws tuaj yeem muab faib ua: dej-soluble thickener thiab micropowder thickener. Raws li lub thickener qhov chaw yuav muab faib ua: natural thickener, hluavtaws thickener. Raws li daim ntawv thov, nws tuaj yeem muab faib ua: dej-raws li thickener, roj-raws li thickener, acidic thickener, alkaline thickener.
| Kev faib tawm | qeb | raw khoom npe |
| dej soluble thickener | Organic Natural Thickener | Hyaluronic Acid, Polyglutamic Acid, Xanthan Gum, Starch, Guar Gum, Agar, Sclerotinia Gum, Sodium Alginate, Acacia Gum, Crumpled Carrageen Powder, Gellan Gum. |
| Organic semi-synthetic thickener | Sodium Carboxymethyl Cellulose, Propylene Glycol Alginate, Hydroxyethyl Cellulose, Sodium Carboxymethyl Starch, Hydroxypropyl Starch Ether, Sodium Starch Phosphate, Acetyl Distarch Phosphate, Phosphorylated Distarch Phosphate, Hydroxylated Distarch Phosphate Prosphate | |
| Organic Synthetic Thickener | Carbopol, polyethylene glycol, polyvinyl cawv | |
| micronized thickener | Inorganic Micropowder Thickener | Magnesium aluminium silicate, silica, bentonite |
| Hloov kho Inorganic Micropowder Thickener | Hloov kho fumed silica, stear ammonium chloride bentonite | |
| Organic Micro Thickener | microcrystalline cellulose |
04 Common thickeners
1. Ntuj dej-soluble thickener
hmoov nplej:Gel tuaj yeem tsim hauv dej kub, hydrolyzed los ntawm enzymes ua ntej rau hauv dextrin, ces mus rau hauv maltose, thiab thaum kawg tag nrho hydrolyzed rau hauv qabzib. Hauv tshuaj pleev ib ce, nws tuaj yeem siv los ua ib feemntawm hmoov rawcov ntaub ntawv nyob rau hauv tshuaj pleev ib ce hmoov khoom thiab adhesives nyob rau hauv rouge. thiab thickeners.
xanthan cov pos:Nws yooj yim soluble hauv dej txias thiab dej kub, muaj ion tsis kam, thiab muaj pseudoplasticity. Lub viscosity yog txo, tab sis rov qab los ntawm shearing. Nws yog feem ntau siv los ua cov thickener nyob rau hauv lub ntsej muag lub ntsej muag, essences, toners thiab lwm yam dej. Cov tawv nqaij zoo li du thiab tsis txhob seasoning. Ammonium preservatives yog siv ua ke.
Sclerotin:100% ntuj gel, kev daws ntawm scleroglucan muaj kev ruaj ntseg tshwj xeeb ntawm qhov kub thiab txias, muaj kev siv tau zoo nyob rau hauv ntau yam ntawm pH qhov tseem ceeb, thiab muaj kev ua siab ntev rau ntau yam electrolytes hauv cov tshuaj. Nws muaj qib siab ntawm pseudoplasticity, thiab viscosity ntawm cov tshuaj tsis hloov ntau nrog qhov kub thiab txias. Nws muaj cov nyhuv moisturizing thiab zoo ntawm daim tawv nqaij, thiab feem ntau yog siv nyob rau hauv lub ntsej muag qhov ncauj qhov ntswg thiab essences.
Guar Gum:Nws yog soluble tag nrho hauv dej txias thiab kub, tab sis insoluble hauv roj, roj, hydrocarbons, ketones thiab esters. Nws tuaj yeem muab faib rau hauv dej kub lossis dej txias los tsim cov kua nplaum, viscosity ntawm 1% aqueous tov yog 3 ~ 5Pa·s, thiab cov tshuaj feem ntau impermeable.
sodium alginate:Thaum pH = 6-9, viscosity ruaj khov, thiab alginic acid tuaj yeem tsim cov nag lossis daus nrog calcium ions, thiab alginic acid gel tuaj yeem ua rau hauv cov kua qaub ib puag ncig.
carrageenan:Carrageenan muaj qhov zoo ion tsis kam thiab tsis cuam tshuam rau enzymatic degradation li cellulose derivatives.
2. Semi-synthetic dej-soluble thickener
Methylcellulose:MC, dej swells mus rau hauv ib tug ntshiab los yog me ntsis turbid colloidal tov. Txhawm rau yaj methylcellulose, thawj zaug tawg nws hauv ib qho dej thaum nws qis dua qhov kub ntawm gel, thiab tom qab ntawd ntxiv dej txias.
Hydroxypropylmethylcellulose:HPMC yog ib qho uas tsis yog-ionic thickener, uas swells mus rau hauv ib tug ntshiab los yog me ntsis turbid colloidal tov nyob rau hauv dej txias. Nws muaj cov ua npuas ncauj zoo-nce thiab ruaj khov hauv cov kua ntxhua khaub ncaws, txhim kho qhov sib xws ntawm lub cev, thiab muaj kev sib koom ua ke nrog cov cationic txias, ua kom zoo dua ntub combing kev ua tau zoo, alkali tuaj yeem ua kom nws qhov kev sib cais, thiab nce me ntsis ntxiv. viscosity, hydroxypropyl methylcellulose yog qhov ruaj khov rau cov ntsev dav dav, tab sis thaum lub concentration ntawm cov ntsev ntsev yog siab, cov viscosity ntawm hydroxypropyl methylcellulose daws yuav txo qis kev xav nce.
Sodium carboxymethyl hmoov txhuv nplej siab： CMC-Na, thaum qhov kev hloov pauv ntau dua 0.5, yooj yim soluble hauv dej los tsim cov pob tshab colloid; CMC nrog rau qib ntawm kev hloov qis dua 0.5 yog insoluble hauv dej, tab sis tuaj yeem yaj hauv alkaline aqueous tov. CMC feem ntau muaj nyob rau hauv daim ntawv ntawm ntau molecular aggregates nyob rau hauv dej, thiab viscosity siab heev. Raws li qhov kub thiab txias, viscosity txo. Thaum pH yog 5-9, viscosity ntawm cov tshuaj yog ruaj khov; thaum pH tsawg dua 3, hydrolysis tshwm sim thaum nag lossis daus tshwm sim; Thaum pH ntau dua 10, viscosity txo me ntsis. Lub viscosity ntawm CMC daws kuj yuav txo qis raws li kev ua ntawm cov kab mob. Kev taw qhia ntawm calcium ions rau hauv CMC aqueous tov yuav ua rau turbidity, thiab qhov sib ntxiv ntawm high-valent hlau ions xws li Fe3+ thiab Al3+ tuaj yeem ua rau CMC los nag lossis tsim cov gel. Feem ntau, qhov muab tshuaj txhuam yog qhov ntxhib heev.
Hydroxyethyl cellulose:HEC, thickener, suspending agent. Nws muaj peev xwm muab tau zoo rheology, film-forming thiab moisturizing zog. Kev ruaj ntseg siab, cov tawv nqaij tawv heev, zoo heev ion kuj, nws yog feem ntau pom zoo kom disperse nyob rau hauv dej txias thiab ces tshav kub thiab do kom dissolve homogeneously.
PEG-120 Methyl Glucose Dioleate:Nws yog tshwj xeeb tshaj yog siv los ua cov tshuaj zawv plaub hau, tshuaj zawv plaub hau, da dej gel, tshuaj ntxuav lub ntsej muag, tshuaj ntxuav tes, tshuaj ntxuav menyuam yaus, thiab tshuaj zawv plaub hau tsis muaj kua muag. Nws muaj txiaj ntsig zoo dua rau qee cov surfactants uas nyuaj rau tuab, thiab PEG-120 methyl qabzib dioleate tsis ua rau lub qhov muag. Nws yog qhov zoo tagnrho rau cov tshuaj zawv plaub hau me nyuam thiab cov khoom ntxuav. Nws yog siv rau hauv cov tshuaj zawv plaub hau, tshuaj ntxuav lub ntsej muag, AOS, AES sodium ntsev, sulfosuccinate ntsev thiab amphoteric surfactants siv nyob rau hauv da dej gel muaj zoo compounding thiab thickening teebmeem,
Post lub sij hawm: Feb-06-2023