1. Zvinhu zvakakosha zveHPMC
Hydroxypropyl methylcellulose (HPMC)is nonionic cellulose ether inoshandiswa zvakanyanya mukuvaka, mishonga, chikafu, cosmetics uye mamwe maindasitiri. Yayo yakasarudzika physicochemical zvimiro, senge solubility, thickening, film-forming uye thermal gelation properties, inoita kuti ive chinhu chakakosha mukushandiswa kwemaindasitiri mazhinji. Tembiricha ndechimwe chezvinhu zvikuru zvinokanganisa mashandiro eHPMC, kunyanya maererano nesolubility, viscosity, thermal gelation uye thermal kugadzikana.
2. Mhedzisiro yekushisa pane solubility yeHPMC
HPMC inonzi thermoreversibly soluble polymer, uye kunyungudika kwayo kunochinja nekupisa:
Yakadzika tembiricha mamiriro (mvura inotonhora): HPMC inonyungudika zviri nyore mumvura inotonhora, asi inotora mvura nekuzvimba kana yatanga kusangana nemvura kuti igadzire gel zvidimbu. Kana kubvongodza kusina kukwana, mapundu anogona kuumba. Naizvozvo, inowanzokurudzirwa kuwedzera HPMC zvishoma nezvishoma uchikurudzira kukurudzira kupararira kweyunifomu.
Tembiricha yepakati (20-40 ℃): Mune ino tembiricha renji, HPMC ine yakanaka solubility uye yakakwirira viscosity, uye inokodzera akasiyana masisitimu anoda kukobvu kana kudzikamiswa.
Tembiricha yepamusoro (inopfuura 60°C): HPMC inokwanisa kugadzira gel rinopisa pakupisa kwepamusoro. Kana tembiricha yasvika kune chaiyo gel tembiricha, mhinduro yacho ichava opaque kana kutoita coagulate, ichikanganisa mashandisiro ekushandisa. Semuenzaniso, muzvigadzirwa zvekuvaka sedhaka kana putty poda, kana tembiricha yemvura yakanyanya kukwira, HPMC inogona kunge isinganyatso kunyungudika, zvichikanganisa kunaka kwekuvaka.
3. Mhedzisiro yekushisa paHPMC viscosity
Iyo viscosity yeHPMC inokanganiswa zvakanyanya nekushisa:
Kuwedzera tembiricha, kudzikira viscosity: Iyo viscosity yeHPMC mhinduro inowanzodzikira nekuwedzera tembiricha. Semuenzaniso, viscosity yeimwe HPMC mhinduro inogona kunge yakakwira pa20 ° C, nepo pa50 ° C, viscosity yayo ichadonha zvakanyanya.
Tembiricha inodzikira, viscosity inopora: Kana iyo HPMC mhinduro yakatonhodzwa mushure mekupisa, viscosity yayo inozopora zvishoma, asi inogona kusakwanisa kudzoka zvachose kune yekutanga mamiriro.
HPMC yemagiredhi akasiyana e-viscosity anoita zvakasiyana: yakakwirira-viscosity HPMC inonyanya kunzwisiswa nekuchinja kwekushisa, nepo yakaderera-viscosity HPMC ine zvishoma viscosity kushanduka kana tembiricha ichichinja. Naizvozvo, zvinonyanya kukosha kusarudza HPMC ine viscosity chaiyo mumamiriro akasiyana ekushandisa.
4. Mhedzisiro yekushisa pane thermal gelation yeHPMC
Hunhu hwakakosha hweHPMC ndeye thermal gelation, ndiko kuti, kana kutonhora kuchikwira kune imwe nhanho, mhinduro yayo inoshanduka kuita gel. Iyi tembiricha inowanzonzi tembiricha yegelation. Mhando dzakasiyana dzeHPMC dzine tembiricha dzakasiyana dzegelation, kazhinji dziri pakati pe50-80 ℃.
Mumaindasitiri ezvekudya nemishonga, hunhu uhu hweHPMC hunoshandiswa kugadzira zvinodhaka zvinoburitswa kana colloids yechikafu.
Mukuvaka zvikumbiro, senge simende dhaka uye putty poda, iyo thermal gelation yeHPMC inogona kupa kuchengetedza kwemvura, asi kana tembiricha yenzvimbo yekuvaka yakakwira zvakanyanya, gelation inogona kukanganisa basa rekuvaka.
5. Mhedzisiro yekushisa pane kugadzikana kwekupisa kweHPMC
Iyo kemikari chimiro cheHPMC yakagadzikana mukati meiyo tembiricha yakafanira, asi kuratidzwa kwenguva refu kune tembiricha yepamusoro kunogona kukonzera kuderera.
Tembiricha yenguva pfupi (yakadai sekudziya kwepakarepo kusvika pamusoro pe100 ℃): inogona kusanyanya kukanganisa kemikari yeHPMC, asi inogona kukonzera shanduko mune zvemuviri, sekudzikira viscosity.
Tembiricha yenguva refu (sekuenderera mberi kupisa pamusoro pe90 ℃): inogona kukonzera kuti molecular cheni yeHPMC iparare, zvichikonzera kudzikira kusingadzoreki kweviscosity, zvichikanganisa kukora uye kugadzira firimu.
Kunyanya kupisa kwepamusoro (kupfuura 200 ℃): HPMC inogona kuora nekupisa, kuburitsa zvinhu zvisingaite senge methanol uye propanol, uye zvichiita kuti zvinhu zvipere kana kunyange carbonize.
6. Kurudziro yekushandisa yeHPMC munzvimbo dzakasiyana dzetembiricha
Kuti upe kutamba kwakazara kuita kweHPMC, matanho akakodzera anofanirwa kutorwa zvinoenderana neyakasiyana tembiricha nharaunda:
Munzvimbo yakadzika tembiricha (0-10 ℃): HPMC inonyungudika zvishoma nezvishoma, uye inokurudzirwa kufanoinyungudutsa mumvura inodziya (20-40 ℃) isati yashandiswa.
Munzvimbo yakajairwa tembiricha (10-40 ℃): HPMC ine mashandiro akagadzikana uye akakodzera kune akawanda maapplication, senge machira, madhaka, chikafu uye zvemishonga.
Munzvimbo yekupisa yepamusoro (pamusoro pe40 ℃): Dzivisa kuwedzera HPMC zvakananga kune yakanyanya tembiricha mvura. Inokurudzirwa kuinyungudutsa mumvura inotonhora isati yaipisa, kana kusarudza yakakwira tembiricha inodzivirira HPMC kudzikisa kukanganiswa kwemafuta gelation pachishandiswa.
Tembiricha ine mhedzisiro yakakosha pakunyungudika, viscosity, thermal gelation uye kugadzikana kwekupisa kwe.HPMC. Munguva yemaitiro ekunyorera, zvinodikanwa kusarudza zvine musoro modhi uye nzira yekushandiswa kweHPMC zvinoenderana nemamiriro ekushisa chaiwo kuti ive nechokwadi chekuita kwayo. Kunzwisisa tembiricha senitivity yeHPMC haingonatsiridze mhando yechigadzirwa, asi zvakare kudzivirira kurasikirwa kusingakoshi kunokonzerwa nekushanduka kwekushisa uye kunatsiridza kugadzirwa kwekugadzira uye mabhenefiti ehupfumi.
Nguva yekutumira: Mar-28-2025