Cellulose jẹ polima adayeba lọpọlọpọ julọ ni iseda. O jẹ apopọ polima laini ti o ni asopọ nipasẹ D-glukosi nipasẹ β-- (1-4) awọn ifunmọ glycosidic. Iwọn polymerization ti cellulose le de ọdọ 18,000, ati iwuwo molikula le de ọdọ awọn miliọnu pupọ.
Cellulose le ṣee ṣe lati inu igi ti ko nira tabi owu, eyiti ara rẹ ko jẹ tiotuka ninu omi, ṣugbọn o ni agbara pẹlu alkali, etherified pẹlu methylene chloride ati propylene oxide, ti a fi omi wẹ, ti a si gbẹ lati gba methyl cellulose ti omi-tiotuka (MC) ati hydroxypropyl methylcellulose (HPMC), iyẹn ni, methoxy ati hydroxypropoxy ni a lo lati rọpo awọn ẹgbẹ hydroxyl lori awọn ipo C2, C3 ati C6 ti glukosi lati ṣe awọn ethers cellulose nonionic.
Methyl cellulose jẹ alainirun, funfun si ọra-wara funfun lulú ni irisi, ati pH ti ojutu jẹ laarin 5-8.
Akoonu methoxyl ti methylcellulose ti a lo bi aropo ounjẹ nigbagbogbo jẹ laarin 25% ati 33%, iwọn aropo ti o baamu jẹ 17-2.2, ati iwọn imọ-jinlẹ ti aropo wa laarin 0-3.
Gẹgẹbi afikun ounjẹ, akoonu methoxyl ti hydroxypropyl methylcellulose nigbagbogbo wa laarin 19% ati 30%, ati akoonu hydroxypropoxyl nigbagbogbo laarin 3% ati 12%.
Awọn abuda ilana
thermoreversible jeli
Methylcellulose/Hydroxypropylmethylcellulose ni awọn ohun-ini gelling thermoreversible.
Methyl cellulose/hydroxypropyl methyl cellulose gbọdọ wa ni tituka ninu omi tutu tabi omi otutu deede. Nigbati ojutu olomi ba gbona, iki yoo tẹsiwaju lati dinku, ati gelation yoo waye nigbati o ba de iwọn otutu kan. Ni akoko yii, methyl cellulose/hydroxypropyl methyl cellulose Ojutu sihin ti propyl methylcellulose bẹrẹ si yipada si funfun wara opaque, ati iki ti o han gbangba pọ si ni iyara.
Iwọn otutu yii ni a pe ni iwọn otutu ibẹrẹ gel gbona. Bi jeli ti n tutu, iki ti o han gbangba ṣubu silẹ ni iyara. Nikẹhin, igbọnwọ viscosity nigbati itutu agbaiye jẹ ibamu pẹlu ọna gbigbọn alapapo akọkọ, jeli yipada si ojutu kan, ojutu naa yipada si gel kan nigbati o ba gbona, ati ilana ti yi pada sinu ojutu kan lẹhin itutu agbaiye jẹ iyipada ati atunwi.
Hydroxypropyl methylcellulose ni iwọn otutu ibẹrẹ gelation ti o ga ju methylcellulose ati agbara gel kekere kan.
Pṣiṣe
1. Awọn ohun-ini iṣelọpọ fiimu
Awọn fiimu ti a ṣẹda nipasẹ methylcellulose/hydroxypropylmethylcellulose tabi awọn fiimu ti o ni awọn mejeeji le ṣe idiwọ iṣilọ epo ni imunadoko ati pipadanu omi, nitorinaa aridaju iduroṣinṣin ti eto ounjẹ.
2. Emulsifying-ini
Methylcellulose/Hydroxypropylmethylcellulose le dinku ẹdọfu oju ati dinku ikojọpọ ọra fun iduroṣinṣin emulsion to dara julọ.
3. Iṣakoso isonu omi
Methylcellulose/Hydroxypropylmethylcellulose le ṣakoso imunadoko gbigbe ọrinrin ounjẹ ti ounjẹ lati didi si iwọn otutu deede, ati pe o le dinku ibajẹ, crystallization yinyin ati awọn iyipada sojurigindin ti ounjẹ ti o ṣẹlẹ nipasẹ itutu agbaiye.
4. iṣẹ alemora
Methylcellulose/Hydroxypropylmethylcellulose ni a lo ni awọn oye to munadoko lati ṣe idagbasoke agbara mnu to dara julọ lakoko mimu ọrinrin ati iṣakoso itusilẹ adun.
5. Idaduro hydration iṣẹ
Lilo methylcellulose/hydroxypropylmethylcellulose le dinku iki fifa ti ounjẹ lakoko sisẹ igbona, nitorinaa ni ilọsiwaju iṣelọpọ iṣelọpọ ni pataki. Dinku igbomikana ati eefin ohun elo, yiyara awọn akoko ilana ilana, mu imudara igbona ṣiṣẹ, ati dinku iṣelọpọ idogo.
6. Thickinging išẹ
Methylcellulose/Hydroxypropylmethylcellulose le ṣee lo ni apapo pẹlu sitashi lati gbejade ipa amuṣiṣẹpọ, eyiti o le mu iki pọ si paapaa ni ipele afikun kekere pupọ.
7. Ojutu naa jẹ iduroṣinṣin labẹ ekikan ati awọn ipo ọti-lile
Awọn ojutu Methylcellulose/Hydroxypropylmethylcellulose jẹ iduroṣinṣin si pH 3 ati pe o ni iduroṣinṣin to dara ninu awọn ojutu ti o ni ọti.
Ohun elo ti methyl cellulose ninu ounje
Methyl cellulose jẹ iru ether cellulose ti kii ṣe ionic ti a ṣẹda nipasẹ lilo cellulose adayeba bi ohun elo aise ati rirọpo awọn ẹgbẹ hydroxyl lori ẹyọ glukosi anhydrous ni cellulose pẹlu awọn ẹgbẹ methoxy. O ni idaduro omi, sisanra, emulsification, dida fiimu, adaptability Wide pH ibiti o ati iṣẹ-ṣiṣe dada ati awọn iṣẹ miiran.
Ẹya pataki rẹ julọ jẹ gelation ti o yipada ni igbona, iyẹn ni, ojutu olomi rẹ ṣe jeli kan nigbati o gbona, o si yipada si ojutu nigbati o tutu. O ti wa ni lilo pupọ ni awọn ounjẹ ti a yan, awọn ounjẹ didin, awọn akara ajẹkẹyin ounjẹ, awọn obe, awọn ọbẹ, awọn ohun mimu, ati awọn nkan pataki. ati candy.
Geli Super ni methyl cellulose ni agbara jeli diẹ sii ju igba mẹta ti awọn gels igbona methyl cellulose ti aṣa, ati pe o ni awọn ohun-ini alemora ti o lagbara pupọ, idaduro omi ati awọn ohun-ini idaduro apẹrẹ.
O ngbanilaaye awọn ounjẹ ti a tunṣe lati da duro sojurigindin ti o fẹsẹmulẹ ati ẹnu sisanra ti mejeeji lakoko ati fun awọn akoko pipẹ lẹhin atuntutu. Awọn ohun elo ti o wọpọ jẹ awọn ounjẹ ti o tutu ni iyara, awọn ọja ajewewe, ẹran ti a tun ṣe, ẹja ati awọn ọja ẹja ati awọn soseji ọra kekere.
Akoko ifiweranṣẹ: Oṣu kejila-12-2022