Qhov txawv ntawm HEC thiab HPMC

HEC (Hydroxyethyl Cellulose) thiab HPMC (Hydroxypropyl Methylcellulose) yog ob qho tib si dav siv hauv kev lag luam pleev xim ua cov thickeners thiab rheology modifiers. Thaum lawv qhia qee qhov zoo sib xws, kuj tseem muaj qhov sib txawv tseem ceeb hauv lawv cov khoom thiab kev siv.

Ib qho ntawm qhov sib txawv tseem ceeb ntawm HEC thiab HPMC nyob hauv lawv cov qauv tshuaj. HEC yog muab los ntawm cellulose los ntawm kev sib ntxiv ntawm ethylene oxide pawg, thaum HPMC yog synthesized los ntawm cellulose los ntawm kev sib ntxiv ntawm propylene oxide thiab methyl pawg. Qhov kev sib txawv ntawm cov qauv no ua rau muaj qhov sib txawv ntawm lawv qhov kev ua tau zoo hauv cov xim pleev xim.

Nyob rau hauv cov nqe lus ntawm daim ntawv thov, HEC yog lub npe hu rau nws zoo heev dej tuav thiab thickening zog, ua rau nws haum rau siv nyob rau hauv cov xim raws li dej. Nws pab txhim kho cov viscosity thiab stability ntawm cov xim, tso cai rau kom zoo dua daim ntawv thov thiab kev pab them nqi. Ntawm qhov tod tes, HPMC muaj qhov zoo sib xws ntawm thickening thiab dej tuav lub peev xwm, tab sis nws kuj muab kev txhim kho sag tsis kam thiab zoo dua qhib lub sij hawm nyob rau hauv cov xim formulations. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv cov txheej txheem ua haujlwm siab thiab cov xim latex.

Lwm qhov sib txawv tseem ceeb ntawm HEC thiab HPMC yog lawv qhov sib xws nrog lwm cov xim ntxiv. HEC yog rhiab heev rau pH thiab electrolytes, uas tuaj yeem txwv nws txoj kev sib raug zoo nrog qee yam tshuaj ntxiv thiab cov qauv. Hauv qhov sib piv, HPMC nthuav tawm kev sib raug zoo nrog ntau yam khoom ntxiv, ua rau nws xaiv ntau yam rau ntau lub tshuab xim.

Tsis tas li ntawd, HPMC paub txog nws cov khoom ua yeeb yaj kiab, uas tuaj yeem ua rau tag nrho cov kav ntev thiab kev ua haujlwm ntawm cov xim xim. Qhov no ua rau nws muaj txiaj ntsig zoo hauv cov xim sab nrauv thiab txheej txheej uas huab cua tsis kam thiab kev tiv thaiv mus ntev yog qhov tseem ceeb.

Hauv kev xaus, thaum ob qho tib si HEC thiab HPMC muab cov txiaj ntsig zoo thiab cov txiaj ntsig zoo hauv cov xim pleev xim, lawv qhov sib txawv ntawm cov qauv tshuaj, kev ua tau zoo, thiab kev sib raug zoo ua rau lawv haum rau ntau hom xim thiab txheej. Kev nkag siab txog cov kev sib txawv no yog qhov tseem ceeb rau cov neeg tsim qauv los xaiv cov khoom tsim nyog tshaj plaws rau kev ua tiav cov xim uas xav tau thiab kev ua haujlwm.