Polyanionic cellulose (PAC) ikemikari yakagadziridzwa kubva kune cellulose, inova polysaccharide inowanzoitika inowanikwa mumadziro emiti.PAC inowanzo shandiswa mumaindasitiri akasiyana siyana, anosanganisira kuchera mafuta, kugadzira chikafu, mishonga yemishonga, uye zvekuzora, nekuda kwekusiyana kwemakemikari.Kuumbwa kwayo kwemakemikari, chimiro, uye zvivakwa zvinoita kuti ive yekuwedzera yakakosha mumashandisirwo mazhinji.
Cellulose chimiro:
Cellulose is linear polysaccharide inoumbwa nekudzokorora zvikamu zve β-D-glucose mamorekuru akabatanidzwa ne β (1 → 4) glycosidic bonds.Yega yega glucose unit ine matatu hydroxyl (-OH) mapoka, ayo akakosha pakugadzirisa kemikari.
Kemikari Kugadziriswa:
Polyanionic cellulose inogadzirwa kuburikidza nekemikari shanduko ye cellulose.Iyo yekugadziridza maitiro inosanganisira kuiswa kweanionic mapoka pane cellulose musana, achiigovera iyo chaiyo midziyo.Nzira dzakajairika dzekugadzirisa cellulose dzinosanganisira etherification uye esterification maitiro.
Anionic Groups:
Iwo anionic mapoka akawedzerwa kune cellulose panguva yekugadziriswa anopa polyanionic zvimiro kune inoguma polymer.Aya mapoka anogona kusanganisira carboxylate (-COO⁻), sulfate (-OSO₃⁻), kana phosphate (-OPO₃⁻) mapoka.Sarudzo yeboka reanionic inotsamira pane inodiwa zvivakwa uye chinangwa chekushandiswa kwe polyanionic cellulose.
Kemikari Kuumbwa kwePAC:
Iyo kemikari ye polyanionic cellulose inosiyana zvichienderana neiyo chaiyo synthesis nzira uye chinangwa chekushandisa.Nekudaro, kazhinji, PAC inonyanyo sanganisira cellulose musana nemapoka eanionic akabatanidzwa pairi.Iyo dhigirii yekutsiva (DS), iyo inoreva avhareji yenhamba yeanionic mapoka paglucose unit, inogona kusiyanisa uye inopesvedzera zvakanyanya zvimiro zvePAC.
Muenzaniso Kuumbwa Kwemakemikari:
Muenzaniso wechimiro chemakemikari ye polyanionic cellulose ine carboxylate mapoka ndeaya anotevera:
Polyanionic Cellulose Chimiro
Muchigadziro ichi, denderedzwa rebhuruu rinomiririra mayuniti eglucose emusana we cellulose, uye madenderedzwa matsvuku anomiririra mapoka e-carboxylate anionic (-COO⁻) akabatanidzwa kune mamwe mayuniti eglucose.
Properties:
Polyanionic cellulose inoratidza akati wandei anodiwa zvivakwa, kusanganisira:
Rheology gadziriso: Inogona kudzora viscosity uye kurasikirwa kwemvura mumashandisirwo akasiyana siyana, akadai sekuchera zvinwiwa muindasitiri yeoiri.
Kuchengeta mvura: PAC inogona kutora uye kuchengetedza mvura, ichiita kuti ive yakakosha muzvigadzirwa zvinoda kudzora hunyoro, senge zvigadzirwa zvekudya kana kugadzirwa kwemishonga.
Kugadzikana: Kunowedzera kugadzikana uye kushanda mumhando dzakasiyana-siyana nekudzivirira kuparadzaniswa kwechikamu kana kuunganidza.
Biocompatibility: Mumashandisirwo mazhinji, PAC inowirirana uye isina chepfu, ichiita kuti ive yakakodzera kushandiswa mumishonga uye zvigadzirwa zvekudya.
Applications:
Polyanionic cellulose inowana maapplication mumaindasitiri akasiyana:
Mafuta ekuchera zvinwiwa: PAC ndiyo yakakosha yekuwedzera mukuchera madhaka kudzora viscosity, kurasikirwa kwemvura, uye shale inhibition.
Kugadziriswa kwechikafu: Inoshandiswa seyakakora, inosimbisa, kana kuchengetedza mvura muzvigadzirwa zvekudya senge sosi, madhirezi, uye zvinwiwa.
Pharmaceuticals: PAC inoshanda sebhainda, disintegrant, kana viscosity modifier mukugadzira piritsi, kumiswa, uye topical creams.
Cosmetics: Inoshandiswa muzvigadzirwa zvekuchengetedza munhu zvakadai semafuta, lotions, uye shampoos kupa viscosity control uye kugadzikana.
Kugadzira:
Iyo nzira yekugadzira ye polyanionic cellulose inosanganisira akati wandei matanho:
Cellulose sourcing: Cellulose inowanzotorwa kubva muhuni pulp kana machira ekotoni.
Chemical modification: Cellulose inopinda etherification kana esterification reactions kuti iunze mapoka eanionic pamayuniti eglucose.
Kucheneswa: Iyo yakagadziridzwa cellulose inonatswa kubvisa tsvina uye ne-zvigadzirwa.
Kuomesa uye kurongedza: Iyo yakacheneswa polyanionic cellulose yakaomeswa uye yakarongedzwa kuti igovere kune akasiyana maindasitiri.
polyanionic cellulose ikemikari yakagadziridzwa kubva kune cellulose ine anionic mapoka akasungirirwa kumusana we cellulose.Kuumbwa kwemakemikari ayo, kusanganisira rudzi uye kuwanda kwemapoka eanionic, inotaridza zvimiro zvayo uye kukodzera kwekushandisa kwakasiyana mumaindasitiri akadai sekuchera oiri, kugadzira chikafu, mishonga, uye zvizorwa.Kuburikidza nekunyatso kudzora kweiyo synthesis uye kugadzirwa kwayo, polyanionic cellulose inoramba iri chinhu chinodiwa chekuwedzera mune akawanda zvigadzirwa uye maitiro pasi rese.
Nguva yekutumira: Kubvumbi-11-2024