Chii chinonzi pH kugadzikana kwehydroxyethylcellulose?

Hydroxyethylcellulose (HEC) ipolymer inonyungudika nemvura inoshandiswa zvakanyanya mumashandisirwo akasiyana siyana seanonamira, machira, uye zvigadzirwa zvekuchengeta munhu. Iyo pH kugadzikana kweHEC inotsamira pazvinhu zvakati wandei, kusanganisira iyo chaiyo giredhi yeHEC, iyo pH yemhando yekushandisa, uye nguva yekuratidzwa kune pH nharaunda.

HEC inowanzogadzikana mukati me pH ye 2-12, iyo inovhara huwandu hwakawanda hweasidhi kune alkaline mamiriro. Zvisinei, kuratidzwa kwenguva refu kune yakanyanyisa pH mamiriro ezvinhu kunogona kukonzera HEC kuderedza, zvichiita kuti kurasikirwa kwayo kuwedzere uye kugadzikana kwezvinhu.

Pa acidic pH values, pasi pe pH ye2, HEC inogona kuita hydrolysis, zvichiita kuti kuderera kwema molecular weight uye kuderedza viscosity. Payakanyanya alkaline pH kukosha, pamusoro pepH 12, HEC inogona kuita alkaline hydrolysis, zvichiita kuti irasikirwe nekukora uye kudzikamisa zvivakwa.

Iyo pH kugadzikana kweHEC inogonawo kukanganiswa nekuvapo kwemamwe makemikari mukugadzira, semunyu kana ma surfactants, ayo anogona kukanganisa pH uye ionic simba remhinduro. Mune zvimwe zviitiko, kuwedzera asidi kana chigadziko chingave chakakosha kugadzirisa pH uye kuchengetedza kugadzikana kweHEC mhinduro.

Kakawanda, HEC inowanzogadzikana mukati mehupamhi hwepH, asi zvakakosha kufunga nezvekushandiswa kwakananga uye maitiro ekugadzirisa kuti ave nechokwadi chokuti HEC inochengetedza zvinhu zvayo zvinoda munguva.