Iyo cellulose ether zvigadzirwa HPMC uye HEMC ine ese ari maviri hydrophobic uye hydrophilic mapoka. Iro methoxy boka ihydrophobic, uye boka re hydroxypropoxy rakasiyana zvichienderana nenzvimbo yekutsiva. Mamwe ari hydrophilic uye mamwe ari hydrophobic. Hydroxyethoxy inonzi hydrophilic. Iyo inonzi hydrophilicity zvinoreva kuti ine pfuma yekuve pedyo nemvura; iyo hydrophobicity zvinoreva kuti ine pfuma yekudzinga mvura. Sezvo chigadzirwa chiri zvese hydrophilic uye hydrophobic, iyo cellulose ether chigadzirwa chine basa repamusoro, iro rinogadzira mabhuru emhepo. Kana chimwe chete chezviviri izvi chiri hydrophilic kana hydrophobic, hapana mabhubhu anozogadzirwa. Zvisinei, HEC inongova neboka re hydrophilic reboka re hydroxyethoxy uye harina boka re hydrophobic, saka haizogadziri mabhubhu.
Iyo bubble phenomenon zvakare yakanangana neiyo dissolution rate yechigadzirwa. Kana chigadzirwa chacho chikanyunguduka pamwero usingaenderani, mabhuru anoumba. Kazhinji, iyo yakaderera viscosity, iyo inokurumidza kukurumidza kupera. Iyo yakakwirira viscosity, inononoka kuparara kwehuwandu. Chimwe chikonzero idambudziko regranulation, iyo granulation haina kuenzana (iyo particle size haina yunifomu, pane yakakura uye diki). Inokonzeresa kuti nguva yekupera ive yakasiyana, inoburitsa mhepo inoputika.
Zvakanakira mabhuru emhepo zvinogona kuwedzera nzvimbo ye batch scraping, chivako chekuvaka chinovandudzwa zvakare, iyo slurry yakareruka, uye batch scraping iri nyore. Izvo zvakashata ndezvekuti kuvepo kwemabhuru kunoderedza kuwanda kwechigadzirwa, kuderedza simba, uye kukanganisa kupikisa kwemamiriro ekunze kwezvinhu.
Nguva yekutumira: Feb-27-2023