Kodi pali kusiyana kotani pakati pa hydroxypropyl methylcellulose ndi carboxymethylcellulose?

Carboxymethyl cellulose CMC, sodium carboxymethyl starch (CMS), mtengo wake ndi wotsika mtengo (kuchokera pakupanga kwa chinthucho, CMC ndi giredi yotsika kuposa Fuying HPMC), carboxymethyl cellulose imagwiritsidwa ntchito ngati ufa wocheperako pamakoma amkati mwa iwo. , kusungirako madzi ndi kukhazikika kumakhala koipa kwambiri kuposa hydroxypropyl methylcellulose, kotero sikungagwiritsidwe ntchito mu putty yopanda madzi ndi kusakaniza kwakunja kwa kutentha kwa kutentha.

Anthu ambiri amaganiza kuti ma cellulosewa ndi amchere, ndipo ufa wa simenti ndi laimu wa laimu ulinso wamchere, ndipo amaganiza kuti angagwiritsidwe ntchito pophatikizana, koma carboxymethyl cellulose ndi sodium carboxymethyl starch sizinthu imodzi, ndipo chloroacetic acid yomwe imagwiritsidwa ntchito popanga. Ndi acidic, ndi zinthu zotsalira mu ndondomeko ya mapadi kupanga amachita ndi simenti ndi laimu kashiamu ufa, kotero iwo sangathe pamodzi. Opanga ambiri ataya kwambiri chifukwa cha izi, kotero chidwi chiyenera kulipidwa. Kugwiritsiridwa ntchito kwa carboxymethyl cellulose ndi hydroxypropyl methyl cellulose ndizofanana, koma ntchito zawo ndizosiyana kwambiri, ndipo zizindikiro zaumisiri ziwirizi ndizosiyana kwambiri. Zida zazikuluzikulu za awiriwa ndi thonje loyengedwa lomwelo, koma zida zawo zothandizira, zida zopangira, komanso kuyenda kwanjira ndizosiyana. Zida zopangira ndi njira ya hydroxypropyl methylcellulose ndizovuta kwambiri. Awiriwo si njira yopangira konse, ndipo zowonjezera zina ndizosiyana, choncho ntchito ndizosiyana. Sangasinthidwe, komanso sangaphatikizidwe wina ndi mnzake kuti achepetse ndalama.

Hydroxypropyl methylcellulose (hpmc) imakhala ndi mankhwala okhazikika, kukana kwa mildew, kusunga madzi abwino kwambiri komanso kukhuthala, ndipo sikukhudzidwa ndi kusintha kwa pH. Kukhuthala kwa 100,000 ndikoyenera ufa wa putty, ndipo kukhuthala kwa 150,000 mpaka 200,000 ndikoyenera pa putty powder. Mu matope, makamaka kumawonjezera kulinganiza katundu ndi constructability, ndipo akhoza kuchepetsa kuchuluka kwa simenti.

Ntchitoyi ndi yakuti matope a simenti ali ndi nthawi yolimba, ndipo amafunika kusungidwa panthawi yolimba, ndipo amafunika kuperekedwa ndi madzi kuti akhale onyowa. Chifukwa cha kusungirako madzi kwa cellulose, madzi ofunikira kuti akhazikitse matope a simenti amatsimikizika kuchokera kumadzi a cellulose, kotero mphamvu yolimba imatha kutheka popanda kukonza.