Cellulose ndiyo yakanyanya kuwanda yemapolymer muzvisikwa. Iro mutsara wepolymer compound yakabatana neD-glucose kuburikidza ne-β-(1-4) glycosidic bonds. Dhigirii repolymerization ye cellulose inogona kusvika 18,000, uye huremu hwemamorekuru hunogona kusvika mamirioni akati wandei.
Cellulose inogona kugadzirwa kubva muhuni pulp kana donje, iyo pachayo isinganyungudika mumvura, asi inosimbiswa nealkali, etherified nemethylene chloride uye propylene oxide, yakashambidzwa nemvura, uye yakaomeswa kuwana mvura-soluble methyl cellulose (MC) uye hydroxypropyl methylcellulose (HPMC), kureva, methoxy uye hydroxypropoxy inoshandiswa kutsiva mapoka ehydroxyl paC2, C3 uye C6 nzvimbo dzeglucose kuti dzigadzire nonionic cellulose ethers.
Methyl cellulose inonhuhwirira, chena kusvika kuchena chena poda muchimiro, uye pH yemushonga iri pakati pe5-8.
Iyo methoxyl yemethoxyl yemethylcellulose inoshandiswa sechikafu chekuwedzera inowanzova pakati pe25% ne33%, inowirirana dhigirii yekutsiva ndeye 17-2.2, uye theoretical degree yekutsiva iri pakati pe0-3.
Sekuwedzera kwechikafu, methoxyl ye hydroxypropyl methylcellulose inowanzova pakati pe19% ne30%, uye iyo hydroxypropoxyl yemukati inowanzova pakati pe3% ne12%.
Maitiro ekugadzirisa
thermoreversible gel
Methylcellulose/Hydroxypropylmethylcellulose ine thermoreversible gelling properties.
Methyl cellulose/hydroxypropyl methyl cellulose inofanira kunyungudutswa mumvura inotonhora kana yakajairika tembiricha mvura. Kana iyo aqueous solution ichipisa, viscosity icharamba ichiderera, uye gelation ichaitika kana yasvika kune imwe tembiricha. Panguva ino, methyl cellulose/hydroxypropyl methyl cellulose Mushonga wakajeka wepropyl methylcellulose wakatanga kushanduka kuita opaque milky white, uye iyo inooneka viscosity yakawedzera nekukurumidza.
Tembiricha iyi inodaidzwa kuti thermal gel initiation temperature. Sezvo gel inotonhora, iyo inooneka viscosity inodonha nokukurumidza. Chekupedzisira, iyo viscosity curve kana kutonhora kunoenderana neyekutanga kupisa viscosity curve, iyo gel inoshanduka kuita mhinduro, mhinduro inoshanduka kuita gel kana yapiswa, uye maitiro ekudzoka kuita mhinduro mushure mekutonhora anodzorereka uye anodzokororwa.
Hydroxypropyl methylcellulose ine yakanyanya kupisa gelation yekutanga tembiricha kupfuura methylcellulose uye yakaderera gel simba.
Performance
1. Mafirimu ekugadzira zvinhu
Mafirimu akaumbwa nemethylcellulose/hydroxypropylmethylcellulose kana mafirimu ane ese ari maviri anogona kudzivirira zvinobudirira kutama kwemafuta uye kurasikirwa kwemvura, nokudaro kuve nechokwadi kugadzikana kwechikafu chimiro.
2. Emulsifying zvivakwa
Methylcellulose/Hydroxypropylmethylcellulose inogona kuderedza kushushikana kwepasi uye kuderedza kuunganidzwa kwemafuta kuitira kugadzikana kwemulsion.
3. Kudzora kurasikirwa kwemvura
Methylcellulose/Hydroxypropylmethylcellulose inogona kunyatso kudzora hunyoro hwekufamba kwechikafu kubva kuchando kusvika kune yakajairika tembiricha, uye inogona kuderedza kukuvadzwa, ice crystallization uye magadzirirwo echikafu anokonzerwa nefiriji.
4. Adhesive performance
Methylcellulose/Hydroxypropylmethylcellulose inoshandiswa muhuwandu hunoshanda kukudziridza yakaringana chisungo simba uchichengetedza hunyoro uye flavour kuburitsa kutonga.
5. Kunonoka hydration kuita
Kushandiswa kwemethylcellulose/hydroxypropylmethylcellulose kunogona kuderedza kupomba viscosity yechikafu panguva yekupisa, nekudaro ichivandudza zvakanyanya kugadzirwa. Inoderedza bhailer uye kusvibiswa kwemidziyo, inomhanyisa nguva yekutenderera, inovandudza kupisa kwemafuta, uye inoderedza kuumbwa kwedhipoziti.
6. Kukora kuita
Methylcellulose/Hydroxypropylmethylcellulose inogona kushandiswa pamwe chete nestarch kuburitsa synergistic effect, iyo inogona kuwedzera zvakanyanya viscosity kunyangwe padanho rekuwedzera rakaderera.
7. Mhinduro yacho yakagadzikana pasi pemamiriro e acidic uye doro
Methylcellulose/Hydroxypropylmethylcellulose mhinduro dzakadzikama kusvika pH 3 uye dzine kugadzikana kwakanaka mumhinduro dzine doro.
Kushandiswa kwemethyl cellulose muchikafu
Methyl cellulose imhando ye-non-ionic cellulose ether inoumbwa nekushandisa yakasikwa cellulose seyakagadzirwa uye kutsiva mapoka ehydroxyl paanhydrous glucose unit mu cellulose nemapoka methoxy. Iyo ine kuchengetwa kwemvura, kukora, emulsification, kuumbwa kwemafirimu, kuchinjika Wide pH renji uye chiitiko chepamusoro uye mamwe mabasa.
Chinhu chayo chinonyanya kukosha ndeye thermally reversible gelation, ndiko kuti, mhinduro yayo ine aqueous inoumba gel kana ichipisa, uye inodzokera kune mhinduro kana yatonhodzwa. Inoshandiswa zvakanyanya mukudya zvakabikwa, zvakakangwa, dhizeti, sosi, soups, zvinwiwa, uye essences. uye candy.
Iyo super gel mumethyl cellulose ine simba rejeri rakapetwa katatu iro reyakajairwa methyl cellulose thermal gels, uye ine yakanyanya kusimba yekunamatira zvimiro, kuchengetedza mvura uye chimiro chekuchengetedza zvimiro.
Inobvumira chikafu chakagadziridzwa kuchengetedza chavanoda chakasimba chimiro uye muto muromo unonzwa zvese panguva uye kwenguva refu yenguva mushure mekudziya zvakare. Mashandisirwo akajairika chikafu chinokurumidza-chando, zvigadzirwa zvemuriwo, nyama yakagadziridzwa, hove uye zvigadzirwa zvegungwa uye masoseji ane mafuta mashoma.
Nguva yekutumira: Zvita-12-2022