Kuyamba kwa Mankhwala a Hydroxyethyl Methyl Cellulose HEMC

Zambiri za hydroxyethyl methylcellulose

Dzina lachi China: Hydroxyethyl methylcellulose
Dzina la Chingerezi: Hymetellose328
Chinese alias: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
zilembo za Chingerezi: Methylhydroxyethylcellulose; Ma cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Chemistry: Hydroymethylmethylcellulose; Hydroxyethyl methylcellulose; Hydroxymethylethyl cellulose.

Molekyulu: C2H6O2 xCH4O x PhEur 2002 imatanthauzira hydroxyethyl methylcellulose ngati gawo la O-methylated, pang'ono O-hydroxymethylated cellulose. Mafotokozedwe osiyanasiyana amasonyezedwa ndi mtengo wa viscosity wowoneka wa 2% w / v yankho lamadzimadzi pa 20 ° C, ndipo unit ndi mPa s.
Kulemera kwa molekyulu: PhEur 2002 imatanthauzira hydroxyethyl methylcellulose ngati gawo la O-methylated, pang'ono O-hydroxymethylated cellulose. Mafotokozedwe osiyanasiyana amasonyezedwa ndi mtengo wa viscosity wowoneka wa 2% w / v yankho lamadzimadzi pa 20 ° C, ndipo unit ndi mPa s.

Makhalidwe akuluakulu a hydroxyethyl methylcellulose (HEMC) ndi awa:

1. Kusungunuka: Kusungunuka m'madzi ndi zosungunulira za organic. HEMC ikhoza kusungunuka m'madzi ozizira. Kuchuluka kwake kwapamwamba kumangotsimikiziridwa ndi mamasukidwe akayendedwe. Kusungunuka kumasiyanasiyana ndi kukhuthala. M'munsi mamasukidwe akayendedwe, kwambiri solubility.

2. Kukana kwa mchere: Mankhwala a HEMC ndi osakhala a ionic cellulose ethers ndipo si polyelectrolytes, choncho amakhala okhazikika muzitsulo zamadzimadzi pamene mchere wachitsulo kapena organic electrolytes ulipo, koma kuwonjezera kwambiri kwa electrolytes kungayambitse gelation ndi mpweya.

3. Ntchito yapamwamba: Chifukwa cha ntchito yogwira ntchito yamadzimadzi, imatha kugwiritsidwa ntchito ngati colloidal protective agent, emulsifier ndi dispersant.

4. Thermal gel: Pamene mankhwala a HEMC amadzimadzi amadzimadzi amatenthedwa kutentha kwina, amakhala opaque, gels, ndi precipitates, koma atakhazikika mosalekeza, amabwerera ku chikhalidwe choyambirira, ndipo gel ndi mpweya zimachitika. Kutentha makamaka kumadalira mafuta awo, kuyimitsa zothandizira, zoteteza colloids, emulsifiers, etc.

5. Metabolic inertness ndi fungo lochepa ndi fungo labwino: HEMC imagwiritsidwa ntchito kwambiri muzakudya ndi mankhwala chifukwa sichidzapangidwa ndi metabolic ndipo imakhala ndi fungo lochepa komanso fungo labwino.

6. Kulimbana ndi mildew: HEMC ili ndi kukana kwabwino kwa mildew komanso kukhazikika kwa viscosity panthawi yosungidwa kwa nthawi yaitali.

7. Kukhazikika kwa PH: Kuthamanga kwa njira yamadzimadzi ya mankhwala a HEMC sikukhudzidwa kwambiri ndi asidi kapena alkali, ndipo pH mtengo ndi wosasunthika pakati pa 3.0-11.0.

Ntchito: Hydroxyethyl methylcellulose angagwiritsidwe ntchito ngati colloidal zoteteza wothandizila, emulsifier ndi dispersant chifukwa pamwamba yogwira ntchito mu amadzimadzi njira. Chitsanzo cha ntchito yake ndi ichi: mphamvu ya hydroxyethyl methylcellulose pa ntchito ya simenti. Hydroxyethyl methylcellulose ndi ufa woyera wopanda fungo, wosakoma, wopanda poizoni womwe ukhoza kusungunuka m'madzi ozizira kuti upange njira yowonekera yowonekera. Lili ndi makhalidwe a thickening, kumanga, kubalalika, emulsifying, filimu kupanga, suspending, adsorbing, gelling, pamwamba yogwira, kusunga chinyezi ndi kuteteza colloid. Popeza njira yamadzimadzi imakhala ndi ntchito yogwira pamwamba, imatha kugwiritsidwa ntchito ngati colloidal protective agent, emulsifier ndi dispersant. Hydroxyethyl methylcellulose yankho lamadzimadzi lili ndi hydrophilicity yabwino ndipo ndi yothandiza posungira madzi.