Hydroxypropyl methylcellulose (HPMC) tau dhau los ua cov khoom xyaw siv ntau hauv cov tshuaj ntxhua khaub ncaws vim nws cov khoom zoo heev uas ua rau tuab, khaws dej thiab emulsifying. HPMC yog cov khoom siv hluavtaws ntawm cellulose, ib qho polymer ntuj pom hauv cov nroj tsuag. HPMC yog cov polymer yaj hauv dej nrog ntau yam kev siv hauv kev lag luam thiab kev tsim khoom. Hauv cov tshuaj ntxhua khaub ncaws, HPMC yog siv los txhim kho kev ua haujlwm ntxuav tag nrho ntawm cov khoom.
HPMC yog ib yam khoom uas yaj tau zoo heev. Qhov solubility ntawm HPMC nyob ntawm ntau yam, suav nrog nws qhov hnyav molecular, qib kev hloov pauv, thiab kub. Feem ntau, HPMC qhia tau tias muaj kev solubility siab hauv dej thiab cov kuab tshuaj polar. HPMC muaj qhov hnyav molecular ntawm 10,000 txog 1,000,000 Da thiab feem ntau muaj kev solubility hauv dej ntawm 1% txog 5%, nyob ntawm qib thiab concentration. Qhov solubility ntawm HPMC hauv dej yog cuam tshuam los ntawm ntau yam xws li pH, kub thiab concentration.
Hauv cov tshuaj ntxhua khaub ncaws, HPMC uas muaj qhov yuav tsum tau yaj ntau yuav tsum tau siv los xyuas kom meej tias cov tshuaj ntxhua khaub ncaws yaj hauv dej kom zoo. Qhov yaj ntawm HPMC hauv cov tshuaj ntxhua khaub ncaws raug cuam tshuam los ntawm ntau yam, suav nrog qhov muaj lwm cov khoom xyaw, qhov kub ntawm lub voj voog ntxuav thiab qhov tawv ntawm dej. Qhov tawv ntawm dej cuam tshuam rau qhov yaj ntawm HPMC vim tias cov ntsiab lus ntau dua ntawm cov zaub mov yaj, xws li calcium thiab magnesium, cuam tshuam rau qhov yaj ntawm HPMC hauv dej.
Nws yog ib qho tseem ceeb heev uas yuav tsum xaiv qib HPMC uas tsim nyog nrog cov kev xav tau solubility siab thiab muaj peev xwm tiv taus cov xwm txheej ntxuav hnyav. Cov qib HPMC uas muaj kev xav tau solubility siab raug pom zoo rau cov tshuaj ntxhua khaub ncaws kom ntseeg tau tias cov khoom yaj tau yooj yim hauv dej thiab muab kev ua haujlwm ntxuav tas li. Kev siv HPMC nrog cov kev xav tau solubility qis dua yuav ua rau cov tshuaj ntxhua khaub ncaws sib sau ua ke thiab poob rau hauv dej, txo qhov ua tau zoo ntawm cov khoom.
Qhov solubility ntawm HPMC yog qhov tseem ceeb rau nws siv rau ntau yam kev siv, suav nrog cov tshuaj ntxhua khaub ncaws. Qhov solubility ntawm HPMC hauv dej yog cuam tshuam los ntawm ntau yam, suav nrog pH, kub, thiab concentration. Hauv cov tshuaj ntxhua khaub ncaws, HPMC nrog cov kev xav tau solubility siab yuav tsum tau siv los xyuas kom meej tias cov khoom yaj hauv dej kom zoo. Kev siv HPMC nrog cov kev xav tau solubility qis dua yuav ua rau cov tshuaj ntxhua khaub ncaws sib sau ua ke thiab ua rau cov khoom tsis zoo. Yog li ntawd, nws yog qhov tsim nyog los xaiv cov qib HPMC tsim nyog nrog cov kev xav tau solubility siab rau cov tshuaj ntxhua khaub ncaws kom ntseeg tau tias muaj kev ua haujlwm tu tas li.
Lub sijhawm tshaj tawm: Cuaj hlis-18-2023