Umehluko Phakathi kwe-CMC ne-HEMC

I-Carboxymethylcellulose (CMC) kanye ne-Hydroxyethyl methylcellulose (HEMC) yizinhlobo ezimbili zokuphuma kwe-cellulose ezivame ukusetshenziswa ezimbonini ezihlukahlukene, okuhlanganisa izimboni zokudla nezamakhemisi. Kokubili i-CMC kanye ne-HEMC ama-polymers ancibilika emanzini atholakala ku-cellulose, kodwa anezakhiwo ezihlukene futhi asetshenziselwa izinhlelo zokusebenza ezahlukene. Kulesi sihloko, sizohlola umehluko phakathi kwe-CMC ne-HEMC.

Isakhiwo Samakhemikhali
Isakhiwo samakhemikhali se-CMC ne-HEMC siyefana, njengoba zombili ziphuma ku-cellulose. I-CMC yenziwa ngokuphendula i-cellulose ne-chloroacetic acid ukukhiqiza amaqembu e-carboxymethyl, kuyilapho i-HEMC yenziwa ngokusabela i-cellulose nge-ethylene oxide ne-methyl chloride ukukhiqiza i-hydroxyethyl namaqembu e-methyl.

Ukuncibilika
Omunye umehluko omkhulu phakathi kwe-CMC ne-HEMC ukuncibilika kwawo emanzini. I-CMC incibilika kakhulu emanzini futhi ingakha isisombululo esicacile, esibonakalayo ngisho nasezindaweni eziphansi. Ngokuphambene, i-HEMC ayincibiliki kancane emanzini kune-CMC futhi ngokuvamile idinga ukusetshenziswa kwe-solvent, njenge-ethanol noma i-isopropyl alcohol, ukuze incibilike ngokuphelele.

I-Viscosity
Omunye umehluko obalulekile phakathi kwe-CMC ne-HEMC yi-viscosity yabo. I-CMC ine-viscous ephezulu futhi ingakha isisombululo esifana nejeli uma sincibilika emanzini. Lokhu kwenza i-CMC ilungele ukusetshenziswa ezinhlelweni lapho kudingeka khona ukujiya noma ukugaywa, njengasembonini yokudla yokwenza amasoso nezingubo zokugqoka. Ngokuphambene, i-HEMC ine-viscosity ephansi kune-CMC futhi ngokuvamile isetshenziswa njenge-thickener noma i-rheology modifier kuzinhlelo zokusebenza lapho isixazululo se-viscous esincane sidingeka.

Ukuqina kwe-pH
I-CMC ngokuvamile izinzile ngaphezu kwebanga elibanzi lamanani e-pH kune-HEMC. I-CMC izinzile kuzo zombili izindawo ezine-acidic kanye ne-alkaline, okuyenza ilungele ukusetshenziswa embonini yokudla, lapho amanani e-pH angahluka kakhulu. Ngokuphambene, i-HEMC izinze kakhulu endaweni ene-acidic kancane ukuya endaweni engathathi hlangothi ye-pH futhi ingehla ngamavelu e-pH aphezulu.

Ukuqina Kwezinga Lokushisa
Kokubili i-CMC ne-HEMC zizinzile phezu kwebanga elibanzi lokushisa, kodwa kunomehluko ekuzinzeni kwazo okushisayo. I-CMC izinzile ngokwe-thermal kune-HEMC futhi ingagcina izakhiwo zayo kumazinga okushisa aphezulu. Lokhu kwenza i-CMC ilungele ukusetshenziswa ezinhlelweni lapho amazinga okushisa aphezulu ebandakanyeka, njengasekukhiqizweni kwezinto ezibhakwayo. I-HEMC, ngakolunye uhlangothi, inokuqina okushisayo okuphansi kune-CMC futhi ingadiliza emazingeni okushisa aphezulu.

Izinhlelo zokusebenza
Kokubili i-CMC ne-HEMC isetshenziswa ezinhlelweni ezahlukahlukene ezimbonini ezahlukahlukene. I-CMC ivamise ukusetshenziswa njenge-thickener, stabilizer, kanye ne-emulsifier embonini yokudla emikhiqizweni efana no-ayisikhilimu, amasoso, nezingubo zokugqoka. Ibuye isetshenziswe embonini yezemithi njenge-binder, disintegrant, kanye ne-ejenti yokumisa. I-HEMC ivamise ukusetshenziswa njenge-thickener, binder, kanye ne-rheology modifier embonini yezokwakha emikhiqizweni efana nopende, okokunamathelayo, nezinamatheliso. Iphinde isetshenziswe embonini yezemithi njenge-binder, i-disintegrant, kanye ne-ejenti yokukhishwa okuqhubekayo.