1.Hydroxypropyl methyl cellulose
Hydroxypropyl methylcellulosendeye cellulose siyana iyo inobuda uye kushandiswa kuri kuwedzera nekukurumidza. Iyo isiri-ionic cellulose yakasanganiswa ether yakagadzirwa kubva kudonje rakanatswa mushure me alkalization, uchishandisa propylene oxide uye methyl chloride se etherification agent, kuburikidza neakatevedzana maitiro. Dhigirii rekutsiva kazhinji 1.2 ~ 2.0. Zvimiro zvayo zvinosiyana zvichienderana nereshiyo yemethoxyl yemukati kune hydroxypropyl yemukati.
(1) Hydroxypropyl methylcellulose inonyungudika nyore nyore mumvura inotonhora, uye ichasangana nematambudziko mukunyungudika mumvura inopisa. Asi tembiricha yayo yegelation mumvura inopisa yakanyanya kukwirira kupfuura yemethyl cellulose. Iyo solubility mumvura inotonhora zvakare yakagadziridzwa zvakanyanya kana ichienzaniswa nemethyl cellulose.
(2) (2) Iyo viscosity yehydroxypropyl methylcellulose inoenderana nehuremu hwayo hwema molecular, uye iyo yakakura iyo molecular uremu, iyo yakakwirira viscosity. Kupisa kunokanganisawo viscosity yayo, sezvo tembiricha inowedzera, viscosity inoderera. Nekudaro, pesvedzero yeayo yakakwirira viscosity uye tembiricha yakaderera pane iyo yemethyl cellulose. Mushonga waro wakagadzikana kana wakachengetwa pakushambidzika kwekamuri.
(3) Kuchengetwa kwemvura kwehydroxypropyl methylcellulose kunoenderana nehuwandu hwayo hwekuwedzera, viscosity, nezvimwewo, uye chiyero chekuchengetedza mvura pasi peiyo imwechete yekuwedzera yakakwira kupfuura iyo yemethyl cellulose.
(4) Hydroxypropyl methylcellulose yakagadzikana kune asidhi uye alkali, uye mhinduro yayo yemvura yakanyatsogadzikana muhuwandu hwepH = 2 ~ 12. Caustic soda uye mvura yeraimu haina mhedzisiro pakuita kwayo, asi alkali inogona kukurumidza kunyungudika kwayo uye kuwedzera zvishoma viscosity yayo. Hydroxypropyl methylcellulose yakagadzikana kune yakajairwa munyu, asi kana kusanganiswa kwemunyu munyu kwakakwira, viscosity yehydroxypropyl methylcellulose mhinduro inowedzera kuwedzera.
(5) Hydroxypropyl methylcellulose inogona kusanganiswa nemvura-inonyungudika polima kuti iite homogeneous, yakakwirira-viscosity mhinduro. Zvakadai se polyvinyl doro, starch ether, muriwo gum, nezvimwe.
(6) Hydroxypropyl methylcellulose ine nani enzyme kuramba kupfuura methylcellulose, uye mhinduro yayo haigone kuderedzwa nema enzymes kupfuura methylcellulose.
(7) Iko kunamatira kwehydroxypropyl methylcellulose kukuvaka kwedhaka kwakakwira kupfuura iyo yemethylcellulose.
2. Hydroxyethyl cellulose
Inogadzirwa kubva mukotoni yakanatswa yakabatwa nealkali, uye yakaitwa ne ethylene oxide se etherification agent pamberi pe isopropanol. Dhigirii rayo rekutsiva kazhinji 1.5 ~ 2.0. Iyo ine yakasimba hydrophilicity uye iri nyore kutora unyoro.
(1) Hydroxyethyl cellulose inonyungudika mumvura inotonhora, asi yakaoma kunyungudika mumvura inopisa. Mhinduro yaro yakagadzikana pakupisa kwepamusoro pasina gelling. Inogona kushandiswa kwenguva yakareba pasi pekushisa kwepamusoro mumatope, asi kuchengetedza kwayo mvura kwakaderera pane iyo yemethyl cellulose.
(2)Hydroxyethyl celluloseyakagadzikana kune yakawanda asidhi uye alkali, uye alkali inogona kukurumidza kuparara kwayo uye zvishoma kuwedzera viscosity yayo. Kupararira kwayo mumvura kwakashata zvishoma kupfuura iyo yemethyl cellulose uye hydroxypropyl methyl cellulose.
(3) Hydroxyethyl cellulose ine yakanaka anti-sag performance yedhaka, asi ine nguva yakareba yekudzosa simende.
(4) Kuita kwehydroxyethyl cellulose inogadzirwa nemamwe mabhizinesi epamba zviri pachena kuti yakaderera pane iyo yemethyl cellulose nekuda kwehuwandu hwemvura uye yakakwira madota.
(5) Hunyoro hwemushonga wemvura wehydroxyethyl cellulose wakakomba. Pakupisa kweanenge 40 ° C, mildew inogona kuitika mukati memazuva matatu kusvika ku5, izvo zvichakanganisa kushanda kwayo.
Nguva yekutumira: Kubvumbi-28-2024