Munyika yemakemikari, kune akawanda makomboni ane zvimiro zvakafanana asi anosiyana mumashandisirwo awo. Mumwe muenzaniso ndeye hydroxypropyl methylcellulose (HPMC) uye hydroxyethyl cellulose (HEC). Aya maviri anobva ku cellulose anoshandiswa zvakanyanya mumaindasitiri akasiyana, asi kunzwisisa kwavo kwakasarudzika kwakakosha pakusarudza yakafanira kubva kune chaiyo application.
Hydroxypropyl methylcellulose, inowanzozivikanwa seHPMC, inogadzirwa kubva kune cellulose. Inowanikwa nekurapa natural cellulose nepropylene oxide uye methyl chloride, uye kuunza hydroxypropyl uye methyl mapoka zvichiteerana. Iyi shanduko inosimudzira kunyungudika kwemvura ye cellulose uye inovandudza hunhu hwayo hwese. Kune rimwe divi, hydroxyethyl cellulose (HEC) zvakare inotorwa selulosi inowanikwa nekuita kwechisikigo cellulose uye ethylene oxide. Kuiswa kwemapoka e-hydroxyethyl kunoguma nekuwedzera kunyungudika kwemvura uye kukora zvivakwa.
Imwe yemisiyano mikuru pakati peHPMC neHEC inzvimbo dzekushandisa. HPMC ine dzakasiyana siyana dzekushandisa muindasitiri yekuvaka. Iyo inoshandiswa zvakanyanya seyakakora mune simende-yakavakirwa zvigadzirwa senge mataira adhesives, yakaoma musanganiswa dhaka uye self-leveling makomisheni. Nekuda kwemaitiro ayo ekuchengetedza mvura, HPMC inovandudza kushanda, kunamatira uye kusimba kwezvivakwa izvi zvekuvaka. Pamusoro pezvo, HPMC inoshandiswa semugadziri wemufirimu-mugadziri mune coating uye pendi, ichipa yakanakisa kudzivirira kwemvura uye kupenya.
HEC, kune rumwe rutivi, inonyanya kushandiswa mukutarisira kwevanhu uye zvizoro. Inoshandiswa seyakakora, emulsifier uye stabilizer mumakirimu, lotions, shampoos uye zvimwe zvigadzirwa zvekunaka. HEC inokwidziridza viscosity yemafomula aya, zvichiita kuti zvive nani kuumbwa, kupararira uye kuita kwese kwechigadzirwa. Kugona kwayo kwekugadzira firimu kunoitawo kuti ive chinhu chakanakira gel dzebvudzi uye mousses, ichipa kwenguva refu kubata pasina kunamira.
Mumwe mutsauko wakakosha ndeye viscosity renji yeaya makomisheni. HPMC kazhinji ine viscosity yakakwirira kupfuura HEC. Uyu mutsauko we viscosity unoita kuti HEC ive yakakodzera kune maapplication anoda yakaderera kusvika pakati nepakati thickening kuita. HEC inopa yakanakisa kugadzikana uye kuyerera kwekutonga mune yemvura magadzirirwo, kuve nechokwadi kunyangwe kugoverwa kwezvinhu zvinoshanda. HPMC's high viscosity, kune rumwe rutivi, inoita kuti ive yakakodzera kune zvikumbiro zvinoda pakati nepamusoro kukora, senge zvekuvaka.
Pamusoro pezvo, HPMC neHEC zvinosiyana mukuenderana kwavo nemamwe makemikari zvinongedzo. HPMC ine kugarisana kwakanaka neyakasiyana-siyana yekuwedzera uye kushivirira kwakanaka kune munyu uye surfactants, zvichiita kuti ishande mumhando dzakasiyana siyana. HEC, nepo ichiwanzoenderana nezvakawanda zvinongedzo, inogona kunge iine nyaya dzekuenderana nemamwe mamunyu, acids, uye surfactants. Naizvozvo, pakusarudza pakati peHPMC neHEC, zvakakosha kufunga nezvekuenderana kwezvinodiwa zveimwe gadziriso.
Muchidimbu, HPMC neHEC, sezvinobva muselulosi, vane zvimiro zvavo zvakasiyana uye mashandisirwo. Kunzwisisa mutsauko pakati pemakomponi aya kwakakosha pakusarudza komisheni yakakodzera kune imwe application. HPMC inoshandiswa zvakanyanya muindasitiri yekuvaka seyakakora uye yekugadzira firimu, nepo HEC ichinyanya kushandiswa muzvigadzirwa zvekuchengetedza munhu seyakakora uye inodzikamisa. Nekutarisa viscosity zvinodiwa uye kuenderana nezvimwe zvinongedzo, iyo yakanyatsokodzera cellulose derivative inogona kusarudzwa, kuve nechokwadi chekuita kwakakwana uye mhedzisiro inodiwa muchigadzirwa chekupedzisira.
Ndatenda nekubatana kwenyu neJINJI CHEMICAL.
Nguva yekutumira: Nov-14-2023