Methylcellose (mc)
Iyo molecular formula ye methylcellose (mc) ndeye:
[C6h7o2 (oh) 3-h (och3) n \] x
Maitiro ekugadzira ndewekuita kuti maleulose ether kuburikidza neyekutevedzana kwekuita mushure mekunge machira akanatswa anobatwa neAlkali, uye methyl chloride anoshandiswa mumiririri. Kazhinji, iyo degree rekutsiva ndeye 1.6 ~ 2.0, uye iyo solubility yakasiyana nemadhigirii akasiyana ekutsiva. Izvo ndezvevasina-ionic cellulose ether.
Methylcellose inonyudza mumvura inotonhora, uye zvichave zvakaoma kunyungudika mumvura inopisa. Mhinduro yaro yemvura yakagadzikana kwazvo mune huwandu hwePH = 3 ~ 12.
Iyo ine kuwirirana kwakanaka ne starch, guar gum, nezvimwewo uye vazhinji surfachan. Kana tembiricha ichisvika kumhepo tembiricha, gelation inoitika.
Kuchengetwa kwemvura kweMethylcellose kunoenderana nehuwandu hwayo hwekuwedzera, viscosity, tenga pubeness uye kupaza mwero.
Kazhinji, kana huwandu hwehuwandu hwakakura, hushoma hushoma, uye visikoka yakakura, iyo mwero wekuchengetwa kwemvura wakakwira. Pakati pavo, huwandu hwekuwedzera hunonyanya kuitwa pane iyo yekuchengetwa kwemvura, uye mwero weViscosity haina kuenzana zvakananga kusvika padanho rekuchengetera mvura. Iyo yekunyungudika chiyero inonyanya kuenderana neiyo degree rekushandurwa kwepasi kweCellulose zvimedu uye tangi.
Pakati peiyo metherulose methelose erinculose uye methyl cellulose uye hydroxyprusll
Carboxymethylcellose (cmc)
CarboxyMethyl Cellose, zvakare anozivikanwa seSodium Carbolosel Cellerose, Cmc, etc., sodium munyu weCellulose Carloylate, uye inovandudzwa uye isingachinjiki. Makemikari zvishandiso zvemakemikari.
Iyo inonyanya kushandiswa muInternational indasitiri, indasitiri yechikafu uye yemunda weoiri anodhiraya mvura, uye huwandu hunoshandiswa mune cosmetics chete maakaundi e1%.
Ionic cellulose ether inogadzirwa kubva kune yakasikwa fibles (machira, etc.) mushure mekurapwa kweAlkali, vachishandisa sodium monochloroacetate seEdhitation mumiriri, uye vachitevera kutevedzana kwekuita.
Dhigirii rekutsiva kazhinji kazhinji 0.4 ~ 1.4, uye kuita kwayo kwakanganiswa zvakanyanya neiyo degree rekutsiva.
CMC ine kugona kusunga kwakanakisa, uye mhinduro kwayo kwemvura ine kugona kusimira, asi hapana kukosha kwepurasitiki chaiyo.
Kana iyo CMC ichipinda, depilymerization chaizvo inoitika. Iyo viscosity inotanga kusimuka panguva yekupararira, inopfuura kuburikidza nehukuru, uye inobva yadonha kuPlateau. Iyo yasolated yiscosity ine hukama ne depilymerization.
Iyo degree re depolymerization inoenderana zvakanyanya nehuwandu hwesimba remarara (mvura) mukuumbwa. Mune isina hurombo solvent system, senge mazino ane glycerin nemvura, cmc haazopfeki zvachose uye ichasvika kune yakaenzana pfungwa.
Panyaya yemvura yakapihwa mvura, iyo hydrophilic yakanyanya kutsiviwa cmc iri nyore kujekesa pane yakaderera cmc.
Hydroxythuslcellose (Hec)
HEC inogadzirwa nekubata yakanatswa machira ane Alkali, uye ozoita neEndylyone oxide seexification mumiririri pamberi peacetone. Iyo degree rekutsiva kazhinji 1.5 ~ 2.0. Iyo ine hydrophilikuti yakasimba uye iri nyore kutora unyoro.
HydroxyTHETL Cellelose inonyudza mumvura inotonhora, asi zvakaoma kunyungudika mumvura inopisa. Kugadziriswa kwayo kwakasimba pakupisa kwakanyanya pasina gomba.
Iyo yakagadzikana kune yakajairika acids uye zvigadziko. Alkalis inogona kukurudzira kupazwa kwayo uye zvishoma kuwedzera zvavakaita viscosity. Kupararira kwayo mumvura kuri kuipa zvishoma pane iyo ye methyl cellulose uye hydroxypruppropyl methyl cellulose.
Hydroxypruppyl methyl cellulose (HPMC)
Iyo molecular formula yeHPMC ndeye:
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Hydroxyprusyl methylcellose ndeye cellulose akasiyana-siyana ndeayo yekubuda uye kushandiswa kuri kuwedzera nekukurumidza.
Icho chisiri-ionic cellulose yakasanganiswa ether yakagadzirwa kubva kukotoni yakanatswa mushure mekunge alkalization, kushandisa profyl Iyo degree rekutsiva kazhinji 1.2 ~ 2.0.
Zvivakwa zvaro zvakasiyana nekuda kweiyo dzakasiyana ratios ye metroxls zvemukati uye hydroxypruppropyl zvemukati.
Hydroxyprusyl methylcellose inonyudza mumvura inotonhora, asi ichasangana nekunetseka mukunyungudika mumvura inopisa. Asi tembiricha yayo yegungwa mumvura inopisa yakakwirira zvakanyanya kupfuura iyo ye methyl cellulose. Iyo solubility mumvura inotonhora inovandudzwa zvakare yakaenzaniswa ne methyl cellulose.
Iyo viscosity ye hydroxyprusyl methylcellose ine hukama nehurume hwayo hunorema, uye yakakura huremu, yakakwira viscosity. Tembiricha inokanganisawo zvavakaita, sekuwedzera kwekuwedzera, viscosity inoderera. Nekudaro, viscosity yakakwira ine yakaderera tembiricha mari pane methyl cellelose. Kugadziriswa kwayo kwakasimba kana kuchengetwa pamhepo tembiricha.
Kuchengetwa kwemvura kwehydroxypropyl methylcellose kunoenderana nehuwandu hwayo hwekuwedzera, viscosity, etc.
HydroxyPropyl methylcellose yakagadzikana kuAcid naAlkali, uye mhinduro kwayo kwemvura yakadzika kwazvo mune huwandu hwePH = 2 ~ 12. Caustic soda uye lime mvura ine zvishoma kushanda pane zvayo kuita, asi Alkali inogona kukurumidza kukurumidza kupaza uye kuwedzera zvavakaita.
Hydroxyprupyl methylcellose yakachengetwa kune zvakajairika kumaronda, asi kana kusungwa kwemhinduro kwakakwirira, iyo visikopa yehydroxyproslose mhinduro inowanzowedzera kuwedzera.
HydroxyPropyl methylcellose inogona kusanganiswa nemvura-yakadzika polymer commer yekuumba yunifomu uye yepamusoro viscosity solution. Senge polyvinyl doro, starch ether, miriwo gamu, nezvimwe.
HydroxyPropyl methylcellose ine zvirinani enzyme kuramba kupfuura methylcellose, uye mhinduro kwayo isingakwanisi kuve yakasvibiswa yakashata kupfuura methylcellose
Kutumira Nguva: Kukadzi-14-2023