Hydroxypropylcellulose (HPC) inogadzirwa kubva kune cellulose, yakasikwa polymer inowanikwa muchirimwa sero madziro. Kugadzirwa kwehydroxypropylcellulose kunosanganisira kugadziridzwa kwekemikari ye cellulose kuburikidza neakateedzana maitiro. Uku kugadziridzwa kunopa cellulose chaiyo zvivakwa zvinoita kuti zvive zvakakosha mumhando dzakasiyana dzeindasitiri nemishonga.
Chimiro che hydroxypropylcellulose:
Hydroxypropylcellulose ndeye hydroxyalkyl kubva kune cellulose umo iyo hydroxypropyl boka inosungirirwa kune cellulose musana. Iyo cellulose musana pachayo iketani yakatsetseka yemayuniti eglucose akabatanidzwa ne β-1,4-glycosidic bond. Mapoka eHydroxypropyl anounzwa nekuita cellulose nepropylene oxide pamberi pe alkaline catalyst.
Iyo dhigirii yekutsiva (DS) ndiyo yakakosha parameter inotsanangura chimiro chehydroxypropylcellulose. Inomiririra avhareji yenhamba yemapoka ehydroxypropyl paglucose unit mune cellulose cheni. DS inogona kudzorwa panguva yekugadzira, ichibvumira kugadzirwa kwehydroxypropylcellulose ine madhigirii akasiyana ekutsiva kusangana nezvinodiwa zvekushandisa.
Synthesis ye hydroxypropylcellulose:
Iyo synthesis yehydroxypropylcellulose inosanganisira kuita pakati peselulosi uye propylene oxide. Kuita uku kunowanzoitwa pamberi peiyo yakakosha catalyst senge sodium hydroxide. Alkaline catalysts inosimudzira kuvhurwa kwemhete epoxy mupropylene oxide, zvichikonzera kuwedzera kwemapoka ehydroxypropyl kune ketani ye cellulose.
Mhedzisiro yacho inowanzoitwa musolvent uye tembiricha uye nguva yekuita zvinonyatsodzorwa kuti uwane iyo inodiwa dhigirii yekutsiva. Mushure mekuita, chigadzirwa chinowanzocheneswa kuburikidza nemaitiro akadai sekugeza uye kusefa kubvisa chero asina kupindurwa reagents kana ne-zvigadzirwa.
Hunhu hweHydroxypropyl Cellulose:
Solubility: Hydroxypropylcellulose inonyungudika mune zvakasiyana siyana zvinonyungudutsa, kusanganisira mvura, ethanol, uye akawanda organic solvents. Iyi solubility pfuma inoita kuti ive yakakodzera kune akasiyana maapplication.
Viscosity: Kuwedzera hydroxypropyl mapoka kune cellulose kunowedzera kunyungudika uye kuchinja viscosity zvimiro zvepolymer. Izvi zvinoita kuti hydroxypropylcellulose ive yakakosha mukugadzirwa kwemishonga, kazhinji seyakakora kana gelling agent.
Firimu Magadzirirwo: Hydroxypropylcellulose inogona kuumba anochinjika uye akajeka mafirimu, ichiita kuti ive yakakodzera kune mabhanhire, mafirimu uye seanosungira mukugadzirwa kwehwendefa.
Thermal Kugadzikana: Hydroxypropylcellulose ine yakanaka kugadzikana kwekushisa, ichibvumira kuti ishandiswe mumhando dzakasiyana dzemaindasitiri pasina kuderera kwakanyanya.
Kugarisana: Inoenderana nemamwe akasiyana mapolymers uye anobatsira, inowedzera kukosha kwayo mukugadzirwa kwemishonga uye zvizorwa.
Kushandiswa kweHydroxypropyl Cellulose:
Pharmaceuticals: Hydroxypropylcellulose inoshandiswa zvakanyanya muindasitiri yemishonga sechinhu chinosungirwa mukugadzirwa kwemapiritsi, viscosity modifier mumafomu emuyero wemvura, uye firimu-inogadzira ajenti mune coatings yemuromo dosage mafomu.
Personal Care Zvigadzirwa: Muzvizoro uye zvigadzirwa zvekuchengeta munhu, hydroxypropylcellulose inoshandiswa seyakakora, stabilizer uye firimu-inogadzira mumiriri mune zvigadzirwa senge makirimu, lotions uye bvudzi rekuchengetedza maumbirwo.
Zvishandiso zveIndasitiri: Nekuda kweiyo firimu-inogadzira uye inonamira zvivakwa, hydroxypropylcellulose inogona kushandiswa mumhando dzakasiyana dzemaindasitiri ekushandisa, kusanganisira machira, anonamira uye seanosungira mukugadzirwa kwezvinyorwa zvakaumbwa.
Indasitiri yeChikafu: Muindasitiri yechikafu, hydroxypropylcellulose inogona kushandiswa seyakakora uye inodzikamisa mune mamwe magadzirirwo echikafu.
Indasitiri yemachira: Hydroxypropyl cellulose inogona kushandiswa muindasitiri yemachira neayo ekugadzira firimu uye anonamira zvivakwa kubatsira nekupedza machira.
Hydroxypropyl cellulose ndeye yakagadziridzwa cellulose derivative iyo inoshandiswa zvakanyanya mumishonga, zvigadzirwa zvekuchengeta munhu, uye akasiyana maindasitiri ekushandisa nekuda kwekunyungudika kwayo, viscosity-inogadzirisa zvivakwa, firimu-kugadzira kugona, uye kuenderana nezvimwe zvekushandisa. Kuita kwayo kwakasiyana-siyana uye inodzorwa synthesis inoita kuti ive yakakosha polymer mumhando dzakasiyana dzekushandisa.
Nguva yekutumira: Zvita-26-2023