Kugadzirira uye zvinhu zvemuviri zvehydroxypropyl starch ether

Hydroxypropyl starch ether (HPStE) inogadzirwa kuburikidza nekugadzirisa makemikari maitiro anosanganisira kuunza mapoka ehydroxypropyl pamorekuru westarch. Nzira yekugadzirira inowanzobatanidza matanho anotevera:

1. Kusarudza Starch: Yemhando yepamusoro sitachi, kazhinji inotorwa kubva kunzvimbo dzakadai sechibage, gorosi, mbatatisi, kana tapioca, inosarudzwa sechinhu chekutanga. Sarudzo ye starch sosi inogona kukanganisa zvimiro zvekupedzisira HPStE chigadzirwa.
2. Kugadzirira kweStarch Paste: Iyo yakasarudzwa starch inoparadzirwa mumvura kuti iite starch paste. Iyo paste inopisa kune chaiyo tembiricha kuti gelatinize iyo starch granules, ichibvumira zvirinani reactivity uye kupinza kwema reagents mumatanho anotevera ekugadzirisa.
3. Etherification Reaction: Iyo gelatinized starch paste inobva yaitwa nepropylene oxide (PO) muhupo hwekugadzirisa pasi pemamiriro ezvinhu anodzorwa. Propylene oxide inopindirana nemapoka ehydroxyl (-OH) pamorekuru westarch, zvichikonzera kubatanidzwa kwemapoka ehydroxypropyl (-OCH2CH(OH)CH3) kumusana westarch.
4. Neutralization uye Kucheneswa: Mushure mekuita etherification, musanganiswa wekuita hausike kuti ubvise chero akawandisa reagents kana catalysts. Iyo hydroxypropyl starch ether inobuda inocheneswa kuburikidza nemaitiro akadai sekusefa, kuwacha, nekuomeswa kubvisa tsvina nemakemikari asara.
5. Particle Size Adjustment: Izvo zvemuviri zvimiro zveHPStE, senge particle size uye kugovera, inogona kugadziridzwa kuburikidza nekugaya kana kugaya maitiro kuti uwane inodiwa maitiro kune chaiwo maapplication.

Zvimiro zve hydroxypropyl starch ether zvinogona kusiyana zvichienderana nezvinhu zvakaita sedhigirii rekutsiva (DS), uremu hwemamorekuru, saizi yechidimbu, uye mamiriro ekugadzirisa. Zvimwe zvakajairika zvemuviri zveHPStE zvinosanganisira:

1. Kuonekwa: HPStE inowanzoita chena kusvika kune-chena poda ine yakanaka particle size distribution. Iyo particle morphology inogona kusiana kubva kudenderedzwa kusvika kune isina kujairika maumbirwo zvichienderana nemagadzirirwo ekugadzira.
2. Particle Size: Iyo particle size yeHPStE inogona kubva padiki mamicrometer kusvika kumakumi emamicrometer, ine mhedzisiro yakakosha pakupararira kwayo, kunyungudika, uye kushanda kwayo mumashandisirwo akasiyana siyana.
3. Bulk Density: Iyo yakawanda density yeHPStE inokanganisa kuyerera kwayo, maitiro ekubata, uye kurongedza zvinodiwa. Inowanzo kuyerwa mumagiramu pa cubic centimita (g/cm³) kana makirogiramu parita (kg/L).
4. Solubility: HPStE hainyunguriki mumvura inotonhora asi inogona kupararira nekuzvimba mumvura inopisa, ichiita zvigadziriso zve viscous kana gels. Iyo solubility uye hydration zvimiro zveHPStE zvinogona kusiyana zvichienderana nezvinhu zvakaita seDS, uremu hwemamorekuru, uye tembiricha.
5. Viscosity: HPStE inoratidza kukora uye rheological control zvivakwa mumasisitimu ane aqueous, zvichipesvedzera viscosity, mafambiro ekuyerera, uye kugadzikana kwekuumbwa. Iyo viscosity yeHPStE mhinduro inoenderana nezvinhu zvakaita sekutarisa, tembiricha, uye shear rate.
6. Hydration Rate: The hydration rate yeHPStE inoreva chiyero chainomwisa mvura nekuzvimba kuti iumbe zvigadziriso zve viscous kana gels. Ichi chivakwa chakakosha mumashandisirwo uko nekukurumidza hydration uye thickening zvinodiwa.

kugadzirira uye chimiro chemuviri we hydroxypropyl starch ether zvakagadzirirwa kusangana nezvinodiwa zvekushandisa uye maitiro ekuita, zvichiita kuti zvive zvakasiyana-siyana uye zvakakosha zvinowedzera mumaindasitiri akasiyana-siyana uye magadzirirwo.