Methylcellulose (MC) ose mea fa'amea fa'amea fa'akomepiuta masani, o se ether cellulose ua suia e maua mai i le methylating cellulose natura. Ona o lona faʻapitoa faʻapitoa ma vailaʻau faʻapitoa, e faʻaaogaina lautele i le fausiaina, meaʻai, vailaʻau, mea teuteu, pepa ma paʻu.
1. Fa'avasegaina i le tikeri o le suitulaga
O le tikeri o le suitulaga (DS) e faasino i le tau averesi o vaega hydroxyl e suitulaga i vaega methyl i iunite kulukose taitasi i le methylcellulose. E 3 vaega hydroxyl i luga o mama kulukose taitasi o le mole mole o le cellulose e mafai ona suia i vaega methyl. O le mea lea, o le tikeri o le suitulaga o le methylcellulose e mafai ona fesuisuiai mai le 0 i le 3. E tusa ai ma le tikeri o le suitulaga, e mafai ona vaevaeina le methylcellulose i ni vaega se lua: maualuga maualuga o le sui ma le maualalo o le tulaga.
Tulaga maualuga o le suitulaga methylcellulose (DS> 1.5): O lenei ituaiga o oloa e maualuga lona tulaga o le methyl substitution, o lea e sili atu le hydrophobic, e maualalo le solubility ma le lelei o le vai. E masani ona faʻaaogaina i mea faufale, paʻu ma isi taimi e manaʻomia ai se tikeri o le hydrophobicity.
Tulaga maualalo o le suitulaga methylcellulose (DS <1.5): Ona o le itiiti ifo o le methyl substitution, o lenei ituaiga oloa e sili atu le hydrophilic, e sili atu le solubility ma e mafai ona faʻamavaeina i le vai malulu. O le methylcellulose maualalo maualalo e faʻaaogaina lautele i meaʻai ma falemaʻi vailaʻau e pei o se mafiafia, emulsifier ma stabilizer.
2. Fa'avasegaga ile fa'aoga
E tusa ai ma le faʻaaogaina o le methylcellulose i vaega eseese, e mafai ona vaevaeina i ni vaega se lua: methylcellulose alamanuia ma meaʻai ma vailaʻau methylcellulose.
Alamanuia methylcellulose: E masani ona faʻaaogaina i le fausiaina, faʻapipiʻi, pepa, ceramics ma isi pisinisi e pei o se mafiafia, faʻapipiʻi, ata tifaga muamua, vai faʻamauina sui, ma isi. tumau; i le alamanuia coatings, methylcellulose e mafai ona faateleina le mautu ma dispersibility o coatings.
Meaʻai ma vailaʻau methylcellulose: Ona o ona mea e le oona ma le afaina, o le methylcellulose e faʻaaogaina e fai ma faʻaopoopoga i meaʻai ma vailaʻau. I meaai, methylcellulose o se mafiafia masani ma emulsifier e mafai ona faʻamautu le fausaga o meaʻai ma puipuia ai le stratification poʻo le vavaeeseina; i totonu o vailaʻau, methylcellulose e mafai ona faʻaaogaina e avea o se atigi pusa, o se vailaʻau faʻasaina, ma o loʻo i ai foi le gaioiga o vailaʻau faʻamalolo. O lona fa'aogaina ma le saogalemu e ta'uta'ua ai le methylcellulose i nei vaega e lua.
3. Fa'avasegaina i solubility
Methylcellulose e masani ona vaevaeina i ni vaega se lua i tulaga o solubility: vai malulu soluble ituaiga ma organic solvent soluble ituaiga.
Suavai malulu soluble methylcellulose: O lenei ituaiga methylcellulose e mafai ona solo i le vai malulu e fausia ai se vaifofo manino, viscous pe a uma ona faʻamavae. E masani ona faʻaaogaina i meaʻai ma falemaʻi falemaʻi e pei o se mafiafia poʻo se ata tifaga muamua. O le solubility o lenei ituaiga o methylcellulose e faʻaitiitia i le faʻateleina o le vevela, o lea e mafai ai ona faʻaogaina lenei vaega mo le faʻatonutonuina o le fausiaina pe a faʻaaogaina i fale faufale.
methylcellulose soluble solu fa'aletino: O lenei ituaiga methylcellulose e mafai ona fa'amavaeina i so'o so'o ma e masani ona fa'aaogaina i vali, fa'alavalava ma isi matā'upu tau alamanuia e mana'omia ai fa'asalalauga vaega fa'aola. Ona o le lelei o mea e fai ata tifaga ma le faʻamaʻiina o vailaʻau, e talafeagai mo le faʻaaogaina i lalo o tulaga faigata tau pisinisi.
4. Fa'avasegaga ile mamafa mole (viscosity)
O le mamafa mole mole o le methylcellulose ei ai sona aafiaga taua i luga o ona meatotino, aemaise lava le viscosity faatinoga i le fofo. E tusa ai ma le mamafa o le mole, e mafai ona vaevaeina le methylcellulose i le maualalo o le viscosity type ma le maualuga o le viscosity type.
Ole viscosity maualalo ole methylcellulose: O le mamafa mole mole e la'ititi ma e maualalo le viscosity fofo. E masani ona faʻaaogaina i meaʻai, vailaʻau ma mea faʻalelei, aemaise lava mo le emulsification, faʻamalolo ma mafiafia. O le methylcellulose maualalo maualalo e mafai ona tausia lelei le suavai ma le tutusa, ma e talafeagai mo talosaga e manaʻomia ai fofo maualalo.
High-viscosity methylcellulose: O loʻo i ai se mamafa mole mole tele ma fausia ai se vaifofo maualuga-viscosity pe a uma ona faʻaumatia. E masani ona faʻaaogaina i mea faufale, paʻu ma faʻapipiʻi fale gaosi oloa. Ole maualuga-viscosity methylcellulose e mafai ona faʻaleleia lelei le malosi faʻainisinia, faʻaogaina le faʻaogaina ma le faʻapipiʻiina o le vaifofo, o lea e faʻaaogaina lautele i mea e manaʻomia ai le malosi maualuga ma le maualuga o le ofuina.
5. Fa'avasegaga ile tikeri ole suiga ole vaila'au
Methylcellulose ose mea e maua mai i kemikolo cellulose. E tusa ai ma le fesuiaiga o metotia ma tikeri, e mafai ona vaevaeina i se tasi methyl cellulose ma composite suia cellulose.
Metil cellulose tasi: e faasino i ethers cellulose e na'o le methyl-sui. O lenei ituaiga o oloa o loʻo i ai tulaga mautu faʻaletino ma vailaʻau, ma o lona solubility, mafiafia ma ata-fausia mea e fai si lelei.
Cellulose suiga fa'afefiloi: I le fa'aopoopoina i le methylation, e fa'amanino atili, e pei o le hydroxypropylation, ethylation, ma isi, e fausia ai se oloa fa'aopoopo fa'aopoopo. Mo se faʻataʻitaʻiga, hydroxypropyl methylcellulose (HPMC) ma carboxymethyl cellulose (CMC). O nei celluloses fa'afefiloi e masani ona sili atu le solubility i le vai, tete'e o le vevela ma le mautu, ma e mafai ona fa'afetaui i le tele o mana'oga tau alamanuia.
6. Fa'avasegaina e ala ile alamanuia talosaga
O le lautele o le faʻaogaina o le methylcellulose e mafai ai ona faʻavasegaina e tusa ai ma ona uiga faʻaoga i pisinisi eseese.
Alamanuia faufale methylcellulose: E masani ona faʻaaogaina i mea faʻavae sima ma gypsum-faʻavae e fai ma vai faʻamau ma mafiafia. E mafai ona faʻaleleia le faʻaogaina o mea faufale, puipuia vave vai gau, ma faʻateleina le malosi faʻainisinia o oloa maeʻa.
Alamanuia taumafa methylcellulose: I le avea o se emulsifier, mafiafia ma stabilizer i le gaosiga o meaai. E mafai ona puipuia ai le gau o le vai, faʻaleleia le tofo ma le fausaga o meaʻai, ma faʻateleina le ola o meaʻai.
Alamanuia tau vailaau methylcellulose: E fai ma fusi papa po'o se mea e fa'asa'olotoina mo vaila'au. Methylcellulose e mafai foi ona faʻaaogaina i le sauniuniga o vailaʻau faʻamaʻi e avea o se vailaʻau saogalemu ma aoga.
Alamanuia methylcellulose: I oloa tausiga o le paʻu ma mea teuteu, methylcellulose e faʻaaogaina e avea o se mafiafia, emulsifier ma moisturizer e fesoasoani ai i oloa e fausia se mea maaleale ma lamolemole aʻo faʻaumiina le aafiaga susu.
I se aotelega, e tele auala e faʻavasegaina ai le methylcellulose, lea e mafai ona faʻavasegaina e tusa ai ma ona uiga faʻasolosolo vailaʻau, poʻo e tusa ai ma lona faʻaoga fanua ma meatotino solubility. O nei metotia faʻavasegaga eseese e fesoasoani ia i tatou e malamalama atili ai i uiga ma galuega a le methylcellulose, ma tuʻuina atu foʻi se faʻavae faʻavae mo lona faʻaogaina i vaega eseese.
Taimi meli: Oke-23-2024