Chiyambi cha Hydroxyethyl Methyl Cellulose HEMC

Chidziwitso Choyambira chaHydroxyethyl Methyl cellulose

Dzina lachi China: hydroxyethyl methyl cellulose
Dzina la Chingerezi: Hymetellose328
Dzina lina lachi China: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Dzina lina la Chingerezi: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Mankhwala: Hydroymethylmethylecellulose; Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.

Mamolekyulu: C2H6O2 xCH4O x PhEur 2002 amafotokoza hydroxyethylmethylcellulose ngati cellulose yokhala ndi O-methyl pang'ono, yokhala ndi O-hydroxymethyl pang'ono. Mafotokozedwe osiyanasiyana amafotokozedwa malinga ndi kukhuthala koonekera mu mPas ya yankho lamadzi la 2% w/v pa 20°C.
Kulemera kwa mamolekyulu: PhEur 2002 imatanthauzira hydroxyethylmethylcellulose ngati cellulose yokhala ndi O-methyl pang'ono, yokhala ndi O-hydroxymethyl pang'ono. Mafotokozedwe osiyanasiyana amafotokozedwa malinga ndi kukhuthala koonekera mu mPas ya yankho lamadzi la 2% w/v pa 20°C.

Makhalidwe akuluakulu a hydroxyethyl methyl cellulose (HEMC) ndi awa:

1. Kusungunuka: Kusungunuka m'madzi ndi zinthu zina zachilengedwe, HEMC imatha kusungunuka m'madzi ozizira, kuchuluka kwake kwakukulu kumangotsimikiziridwa ndi kukhuthala, kusungunuka kumasiyana malinga ndi kukhuthala, kukhuthala kutsika, kusungunuka kumakulirakulira.

2. Kukana Mchere: Zopangidwa ndi HEMC ndi ma ether a cellulose omwe si a ionic ndipo si ma polyelectrolyte, kotero pakakhala mchere wachitsulo kapena ma electrolyte achilengedwe, zimakhala zokhazikika m'madzi amadzi, koma kuwonjezera ma electrolyte kwambiri kungayambitse kufalikira kwa madzi ndi mvula.

3. Ntchito ya pamwamba: Popeza madzi amadzi ali ndi ntchito ya pamwamba, angagwiritsidwe ntchito ngati choteteza cha colloid, emulsifier ndi dispersant.

4. Gel wotentha: Pamene yankho lamadzi la HEMC litenthedwa kufika kutentha kwinakwake, limakhala losawoneka bwino, ma gel, ndipo limapanga mpweya wozizira, koma likazizira nthawi zonse, limabwerera ku momwe yankho limakhalira poyamba, ndipo gel ndi mvula zimachitika. Kutentha kumadalira makamaka mafuta awo, zothandizira zopachika, ma colloid oteteza, ma emulsifiers, ndi zina zotero.

5. Kusagwira bwino ntchito kwa kagayidwe kachakudya komanso fungo lochepa: HEMC imagwiritsidwa ntchito kwambiri mu chakudya ndi mankhwala chifukwa siigwiritsidwa ntchito mopitirira muyeso ndipo ili ndi fungo lochepa komanso fungo lochepa.

6. Woletsa bowa: HEMC ili ndi mphamvu yabwino yolimbana ndi bowa komanso kulimba bwino kwa mabakiteriya akasungidwa kwa nthawi yayitali.

7. Kukhazikika kwa PH: Kukhuthala kwaHEMCMadzi a mankhwala sakhudzidwa kwambiri ndi asidi kapena alkali, ndipo pH ndi yokhazikika pakati pa 3.0-11.0.

Kugwiritsa Ntchito: Hydroxyethyl methyl cellulose ingagwiritsidwe ntchito ngati choteteza cha colloid, emulsifier ndi dispersant chifukwa cha ntchito yogwira ntchito pamwamba pa yankho lamadzi. Chitsanzo cha momwe imagwiritsidwira ntchito ndi ichi: Mphamvu ya hydroxyethyl methyl cellulose pa makhalidwe a simenti. Hydroxyethyl methylcellulose ndi ufa woyera wopanda fungo, wopanda kukoma, wopanda poizoni womwe umasungunuka m'madzi ozizira kuti upange yankho lomveka bwino komanso lokhuthala. Ili ndi makhalidwe a kukhuthala, kumangirira, kufalitsa, kusakaniza, kupanga filimu, kuyimitsa, kusakaniza, gelling, kugwira ntchito pamwamba, kusunga chinyezi ndi kuteteza ma colloid. Chifukwa cha ntchito yogwira ntchito pamwamba pa yankho lamadzi, ingagwiritsidwe ntchito ngati choteteza cha colloid, emulsifier ndi dispersant. Hydroxyethyl methyl cellulose aqueous solution ili ndi hydrophilicity yabwino ndipo ndi yothandiza kwambiri kusunga madzi.