Le HPMC ati CMC illa
Methyl cellulose jẹ funfun tabi funfun bi fibrous tabi granular lulú;Alaini oorun, adun.Ọja yi ni omi wiwu sinu kan ko o tabi die-die turbid colloidal ojutu;Ailopin ninu ethanol pipe, chloroform tabi diethyl ether.O ti tuka ni kiakia ati wiwu ninu omi gbona ni 80-90 ℃, ati ni tituka ni kiakia lẹhin itutu agbaiye.Ojutu olomi jẹ iduroṣinṣin ni iwọn otutu yara, ati pe o le jeli ni iwọn otutu giga, ati jeli le yipada pẹlu ojutu pẹlu iwọn otutu.
O ni o dara wettability, pipinka, adhesion, thickening, emulsification, omi idaduro ati fiimu Ibiyi, bi daradara bi epo impermeability.Awọn fiimu ni o ni o tayọ toughness, ni irọrun ati akoyawo.Nitoripe kii ṣe ionic, o le ni ibamu pẹlu awọn emulsifiers miiran, ṣugbọn o rọrun lati yọ jade, ati pe ojutu jẹ iduroṣinṣin ni ibiti PH2 - 12. Sodium carboxymethyl cellulose Ọja yii jẹ iyọ iṣuu soda ti cellulose carboxymethyl ether, je ti anionic cellulose ether, jẹ funfun tabi wara funfun fibrous lulú tabi patiku, iwuwo 0.5-0.7 g / cubic centimeter, fere odorless, tasteless, hygroscopic.Rọrun lati tuka ninu omi sinu ojutu gelatinous sihin, insoluble ni ethanol ati awọn olomi Organic miiran.
Nigbati pH ti ojutu olomi jẹ 6.5 - 8.5, iki ti slurry dinku ni pataki nigbati pH jẹ> 10 tabi <5, ati pe iṣẹ naa dara julọ nigbati pH jẹ 7. Fun iduroṣinṣin igbona, viscosity nyara ni kiakia ni isalẹ. 20℃, ayipada laiyara ni 45 ℃, ati awọn colloid denaturation ati iki ati awọn ini dinku significantly nigbati kikan fun igba pipẹ loke 80 ℃.Ni irọrun tiotuka ninu omi, ojutu sihin;O jẹ iduroṣinṣin pupọ ni ojutu ipilẹ, ati rọrun lati hydrolyze ninu ọran acid.Nigbati iye pH jẹ 2-3, ojoriro yoo waye, ati ojoriro yoo tun waye ninu ọran ti awọn iyọ irin multivalent.Hydroxypropyl methyl cellulose, tun mo bi hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, ni yiyan ti gíga funfun owu cellulose bi aise ohun elo, labẹ ipilẹ awọn ipo nipa pataki etherification ati igbaradi.
Tiotuka ninu omi ati ọpọlọpọ awọn pola C ati ipin ti o yẹ ti ethanol / omi, propanol / omi, dichloroethane, ati bẹbẹ lọ, insoluble in diethyl ether, acetone, ethanol pipe, wiwu ni omi tutu sinu ko o tabi die-die turbidized colloidal ojutu.Ojutu olomi naa ni iṣẹ ṣiṣe dada, akoyawo giga ati iṣẹ iduroṣinṣin.HPMC ni o ni ohun ini ti gbona jeli.Lẹhin alapapo, ojutu olomi ọja naa jẹ ojoriro jeli, ati lẹhinna tu lẹhin itutu agbaiye.Awọn iwọn otutu jeli ti o yatọ si ni pato yatọ.
Akoko ifiweranṣẹ: Oṣu Kẹsan-09-2022