Ukulungiselela kanye nezinto ezibonakalayo ze-hydroxypropylylylyl starch ether

I-Hydroxypropyly starch ether (HPSTE) ilungiselelwe ngenqubo yokuguqulwa kwamakhemikhali ehilela ukwethula amaqembu we-hydroxypropyl ku-molecule yesitashi. Indlela yokulungiselela imvamisa ifaka lezi zinyathelo ezilandelayo:

1. Ukukhetha isitaki: isitashi esezingeni eliphakeme, okuvame ukuthathwa emithonjeni efana nommbila, ukolweni, amazambane, noma i-tapioca, kukhethwe njengezinto zokuqala. Ukukhethwa komthombo wesitashi kungathinta izakhiwo zomkhiqizo wokugcina we-HPSTE.
2. Ukulungiswa kwesitashi sokunamathisela: Isitashi esikhethiwe sihlakazeka emanzini ukwakha i-starch paste. I-paste ifudunyezwa emazingeni okushisa athile ukuze i-gelatiinize ama-granule wesitashi, avumela ukusebenziseka kangcono kanye nokungena kwama-reagents ngezinyathelo ezilandelayo zokuguqulwa.
3. Ukusabela kwe-Etherification: I-gelatinised starch paste iphinde yasabela nge-propelllene oxide (PO) phambi kwe-catalyst ngaphansi kwezimo ezilawulwayo. I-Phylene Oxide iphendula ngamaqembu we-hydroxyl (-OH) ku-molecule yesitashi, okuholela ekunamathiselwe kwamaqembu ama-hydroxypropyl (-Hoch2ch (oh) CH3) kwi-Starch Backbone.
4. Ukungathathi hlangothi nokuhlanzwa: Ngemuva kokuphendula ukusheshisa, ingxube yokusabela ayithathi hlangothi ukuze ususe noma yimiphi ama-reagents angejwayelekile noma ama-catalysts. Isitashi se-hydroxyproppropyllopylyl esenziwe ngenhlanziswa ngezinqubo ezinjengokuhlunga, ukugeza, nokusoma ukususa ukungcola namakhemikhali asele.
5. Ukulungiswa kobukhulu bezinhlayiyana: Izakhiwo ezibonakalayo ze-HPSTE, njengosayizi wezinhlayiyana nokusatshalaliswa, zingashintshwa ngokusebenzisa izinqubo zokugaya noma zokugaya ukufeza izici ozifunayo zohlelo oluthile lwezicelo ezithile.

Izakhiwo ezibonakalayo ze-hydroxypropylylylyl ether zingahluka ngokuya ngezinto ezifana nezinga lokufaka esikhundleni (DS), isisindo se-molecular, usayizi wezinhlayiyana, kanye nezimo zokucubungula. Ezinye izakhiwo ezijwayelekile ze-HPSTE zifaka:

1. Ukubukeka: I-HPSTE imvamisa imhlophe ku-powder emhlophe ngokusatshalaliswa kosayizi obuhle. I-corticlrphology eyizinhlayiyana ingahlukahluka kusuka endaweni eyindilinga kuya kubunjwa abangajwayelekile ngokuya ngenqubo yokukhiqiza.
2. Ubukhulu bezinhlayiyana: Ubukhulu bezinhlayiyana ze-HPSTE bungasukela kuma-micrometers ambalwa kuya kumashumi ama-micrometers ama-micrometers, ngokuba nomthelela omkhulu ekuhlakazekeni kwawo, ukulekelela, nokusebenza kwezicelo ezahlukahlukene.
3. Ubuningi be-Bulk: Ubuningi obuningi be-HPSTE lithonya ukugeleza kwalo, ukuphatha izici, nezidingo zokupakisha. Ngokuvamile kulinganiswa ngamagremu nge-cubic centimeter ngayinye (G / CM³) noma amakhilogremu ngelitha (kg / l).
4. I-Solubinity: I-HPSTE iyi-insoluble emanzini abandayo kepha ingahlakazeka futhi ivuvukale emanzini ashisayo, yakha izixazululo ezi-viscous noma ama-gels. I-solubity kanye nezakhiwo ze-hydration ze-HPSTE zingahluka ngokuya ngezinto ezinjenge-DS, isisindo se-molecular, kanye nokushisa.
5. I-Viscosity: I-HPSTE Ebonisa ukuqina kanye nezakhiwo zokulawula ama-bheji ezinhlelweni asheshe, kuthonya ukubonwa, ukugeleza kokuziphatha kanye nokuqina kokwakheka. I-viscosity yezixazululo ze-HPSTE incike ezintweni ezifana nokuhlushwa, izinga lokushisa kanye nezinga le-shear.
6. Izinga le-Hydration: Izinga le-Hydrate le-HPSTE libhekisela ezingeni lapho lithola khona amanzi futhi livuvukala ukuze lithole izixazululo ze-viscous noma ama-gels. Le mpahla ibalulekile kuzinhlelo zokusebenza lapho kudingeka khona i-hydration nokuqina.

Ukulungiswa kanye nezinto ezibonakalayo ze-hydroxypropylylylyl ether zihambisana nokuhlangabezana nezidingo ezithile zohlelo lokusebenza kanye nenqubo yokusebenza, okwenza kube yisengezo esiguquguqukayo futhi esibalulekile ezimbonini ezahlukahlukene kanye nokwakheka.