1. Hydroxypropyl methyl cellulose
Hydroxypropyl methylcelluloseimhando ye cellulose ine kubuda kwayo uye kushandiswa kwayo kuri kuwedzera nekukurumidza. I non-ionic cellulose mixed ether yakagadzirwa nedonje rakacheneswa mushure mekugadziriswa kwe alkali, ichishandisa propylene oxide ne methyl chloride se etherification agent, kuburikidza nematanho akasiyana-siyana. Dhigirii rekutsiva rinowanzova 1.2 ~ 2.0. Hunhu hwayo hunosiyana zvichienderana nehuwandu hwe methoxyl content kune hydroxypropyl content.
(1) Hydroxypropyl methylcellulose inonyungudika nyore nyore mumvura inotonhora, uye inosangana nematambudziko pakunyungudika mumvura inopisa. Asi tembiricha yayo ye gelation mumvura inopisa yakakwira zvakanyanya kupfuura yemethyl cellulose. Kunyungudika mumvura inotonhora kwakawedzerawo zvikuru kana tichienzanisa nemethyl cellulose.
(2) (2) Kuwanda kwehydroxypropyl methylcellulose kwakabatana nehuremu hwayo hwemamorekuru, uye kana huremu hwemamorekuru hwakakura, kukwira kwesimba. Tembiricha inokanganisawo kusimba kwayo, sezvo tembiricha ichiwedzera, kusimba kwayo kunoderera. Zvisinei, simba rekuwedzera kusimba kwayo uye tembiricha yakaderera pane yemethyl cellulose. Mhinduro yayo inogara yakagadzikana kana yakachengetwa patembiricha yemumba.
(3) Kuchengetwa kwemvura kwehydroxypropyl methylcellulose kunoenderana nehuwandu hwayo hwekuwedzera, viscosity, nezvimwewo, uye mwero wayo wekuchengetedza mvura pasi pehuwandu hwayo hwekuwedzera hwakakwira kupfuura hwemethyl cellulose.
(4) Hydroxypropyl methylcellulose inogara yakasimba kune acid nealkali, uye mvura yayo inogadzikana zvakanyanya muhuwandu hwe pH = 2 ~ 12. Caustic soda nemvura ye lime hazvina zvazvinobatsira pakushanda kwayo, asi alkali inogona kukurumidzisa kunyungudika kwayo uye kuwedzera zvishoma viscosity yayo. Hydroxypropyl methylcellulose inogara yakasimba kune common salts, asi kana huwandu hwemunyu hwakakwira, viscosity ye hydroxypropyl methylcellulose solution inowanzo kuwedzera.
(5) Hydroxypropyl methylcellulose inogona kusanganiswa nemapolymer anonyungudika mumvura kuti igadzire mhinduro yakafanana uye ine viscosity yakakwirira. Zvakadai sepolyvinyl alcohol, starch ether, vegetable gum, nezvimwewo.
(6) Hydroxypropyl methylcellulose ine simba riri nani rekudzivirira ma enzymes kupfuura methylcellulose, uye mhinduro yayo hainyanyi kukanganiswa nema enzymes kupfuura methylcellulose.
(7) Kubatana kwehydroxypropyl methylcellulose mukugadzirwa kwemortar kwakakwirira kupfuura kwemethylcellulose.
2. Hydroxyethyl cellulose
Yakagadzirwa nedonje rakanatswa rakarungwa nealkali, uye inosanganiswa ne ethylene oxide se etherification agent kana paine isopropanol. Dhigirii rayo rekutsiva rinowanzova 1.5 ~ 2.0. Ine hydration yakasimba uye iri nyore kunyudza hunyoro.
(1) Hydroxyethyl cellulose inonyungudika mumvura inotonhora, asi inonetsa kunyungudika mumvura inopisa. Mhinduro yayo inogara yakasimba pakupisa kwakanyanya pasina gelling. Inogona kushandiswa kwenguva yakareba pasi pekupisa kwakanyanya mumortar, asi kuchengetedza kwayo mvura kwakaderera pane kwemethyl cellulose.
(2)Hydroxyethyl celluloseYakasimba kune acid nealkali, uye alkali inogona kukurumidzisa kunyungudika kwayo uye kuwedzera viscosity yayo zvishoma. Kupararira kwayo mumvura kwakaipa zvishoma pane kwemethyl cellulose nehydroxypropyl methyl cellulose.
(3) Hydroxyethyl cellulose ine simba rakanaka rekudzivirira kudonha kwesimbi, asi simende inononoka kwenguva yakareba.
(4) Kushanda kwehydroxyethyl cellulose inogadzirwa nemamwe mabhizinesi emuno kuri pachena kuti kwakaderera pane kwemethyl cellulose nekuda kwehuwandu hwayo hwemvura yakawanda uye huwandu hwakawanda hwemadota.
(5) Kuora kwemvura yehydroxyethyl cellulose kwakakomba. Pakupisa kweinenge 40°C, kuora kunogona kuitika mukati memazuva matatu kusvika mashanu, izvo zvinokanganisa mashandiro ayo.
Nguva yekutumira: Kubvumbi-28-2024