Kukonzekera ndi thupi katundu wa hydroxypropyl wowuma ether

Hydroxypropyl starch ether (HPStE) imakonzedwa kudzera mu njira yosinthira mankhwala yomwe imaphatikizapo kuyambitsa magulu a hydroxypropyl pa molekyulu ya wowuma. Njira yokonzekera imakhala ndi izi:

1. Kusankha Wowuma: Wowuma wapamwamba kwambiri, womwe umachokera ku magwero monga chimanga, tirigu, mbatata, kapena tapioca, umasankhidwa ngati zoyambira. Kusankhidwa kwa gwero la wowuma kungakhudze katundu wa chomaliza cha HPStE.
2. Kukonzekera kwa Wowuma Paste: Wowuma wosankhidwayo amamwaza m'madzi kuti apange phala lowuma. Phala ndi usavutike mtima kwa enieni kutentha kwa gelatinize ndi wowuma granules, kulola bwino reactivity ndi malowedwe a reagents mu wotsatira kusinthidwa masitepe.
3. Etherification Rection: The gelatinized wowuma phala kenako anachita ndi propylene okusayidi (PO) pamaso pa chothandizira pansi olamuliridwa zinthu. Propylene oxide imakhudzidwa ndi magulu a hydroxyl (-OH) pa molekyulu ya wowuma, zomwe zimapangitsa kuti magulu a hydroxypropyl (-OCH2CH(OH) CH3) agwirizane ndi nsana wa wowuma.
4. Neutralization ndi Chiyeretso: Pambuyo anachita etherification, zimene osakaniza ndi neutralized kuchotsa reagents owonjezera kapena catalysts. Chotsatira cha hydroxypropyl starch ether chimayeretsedwa kudzera m'njira monga kusefera, kutsuka, ndi kuyanika kuchotsa zonyansa ndi mankhwala otsalira.
5. Kusintha Kukula kwa Particle: The katundu wakuthupi wa HPStE, monga kukula kwa tinthu ndi kugawa, akhoza kusinthidwa kupyolera mu mphero kapena kugaya kuti mukwaniritse zomwe mukufuna kuti mugwiritse ntchito.

Maonekedwe a hydroxypropyl starch ether amatha kusiyanasiyana kutengera kuchuluka kwa m'malo (DS), kulemera kwa maselo, kukula kwa tinthu, ndi momwe zimapangidwira. Zina zodziwika bwino za HPStE ndi izi:

1. Maonekedwe: HPStE nthawi zambiri imakhala yoyera mpaka yoyera yokhala ndi magawo abwino a tinthu tating'onoting'ono. The tinthu morphology angasiyane ozungulira kuti osakhazikika akalumikidzidwa malinga ndi kupanga ndondomeko.
2. Tinthu Kukula: The tinthu kukula kwa HPStE akhoza osiyanasiyana micrometers angapo ma micrometers, ndi zimakhudza kwambiri dispersibility, solubility, ndi magwiridwe ntchito zosiyanasiyana ntchito.
3. Kuchulukirachulukira: Kuchulukirachulukira kwa HPStE kumakhudza kuyenda kwake, mawonekedwe ake, ndi zofunikira pakuyika. Nthawi zambiri amayezedwa mu magalamu pa kiyubiki centimita (g/cm³) kapena ma kilogalamu pa lita (kg/L).
4. Kusungunuka: HPStE sisungunuka m'madzi ozizira koma imatha kumwazikana ndi kutupa m'madzi otentha, kupanga ma viscous solutions kapena gels. The solubility ndi hydration katundu wa HPStE akhoza kusiyana kutengera zinthu monga DS, molecular kulemera, ndi kutentha.
5. Viscosity: HPStE imawonetsa kukhuthala ndi kuwongolera kwamphamvu m'makina amadzi, kukopa kukhuthala, machitidwe oyenda, komanso kukhazikika kwa mapangidwe. Kukhuthala kwa mayankho a HPStE kumadalira zinthu monga ndende, kutentha, ndi kumeta ubweya.
6. Mtengo wa Hydration: Mlingo wa hydration wa HPStE umatanthawuza kuchuluka komwe imayamwa madzi ndikufufuma kuti ipange ma viscous solutions kapena gels. Katunduyu ndi wofunikira pakugwiritsa ntchito komwe hydration mwachangu ndi thickening zimafunikira.

Kukonzekera ndi mawonekedwe akuthupi a hydroxypropyl starch ether amapangidwa kuti akwaniritse zofunikira zenizeni zogwiritsira ntchito ndi njira zogwirira ntchito, zomwe zimapangitsa kuti zikhale zowonjezereka komanso zofunikira zowonjezera m'mafakitale osiyanasiyana ndi mapangidwe.