Gutegura nibintu bifatika bya hydroxypropyl krahisi ether

Hydroxypropyl starch ether (HPStE) itegurwa binyuze muburyo bwo guhindura imiti ikubiyemo kwinjiza amatsinda ya hydroxypropyl kuri molekile ya krahisi. Uburyo bwo kwitegura busanzwe bukubiyemo intambwe zikurikira:

1. Guhitamo ibinyamisogwe: Ibinyamisogwe byujuje ubuziranenge, mubisanzwe biva mu masoko nk'ibigori, ingano, ibirayi, cyangwa tapioca, byatoranijwe nk'ibikoresho byo gutangira. Guhitamo inkomoko yisoko irashobora guhindura imiterere yibicuruzwa bya nyuma bya HPStE.
2. Gutegura paste ya krahisi: Ikariso yatoranijwe ikwirakwizwa mumazi kugirango ikore paste. Iyi paste yashyutswe ku bushyuhe bwihariye kugirango gelatine ya granules, itume hashobora kubaho neza no kwinjira muri reagent mu ntambwe zikurikira zo guhindura.
3. Imyitwarire ya Etherification: Paste ya gelatinize ikarishye ihita ikorwa na oxyde ya propylene (PO) imbere ya catalizator mugihe cyagenwe. Okiside ya propylene ikora hamwe nitsinda rya hydroxyl (-OH) kuri molekile ya krahisi, bikaviramo guhuza amatsinda ya hydroxypropyl (-OCH2CH (OH) CH3) kumugongo wumugongo.
4. Kutabogama no kwezwa: Nyuma ya reaction ya etherification, imvange ya reaction itabangamiwe kugirango ikureho reagent zirenze urugero cyangwa catalizator. Hydroxypropyl ya krahisi ivamo noneho isukurwa hifashishijwe inzira nko kuyungurura, gukaraba, no gukama kugirango ikureho umwanda n’imiti isigaye.
5. Ingano yubunini bwahinduwe: Imiterere yumubiri ya HPStE, nkubunini bwingingo nogukwirakwiza, irashobora guhindurwa binyuze mu gusya cyangwa gusya kugirango ugere kubintu byifuzwa kubikorwa byihariye.

Imiterere yumubiri ya hydroxypropyl krahisi ether irashobora gutandukana bitewe nimpamvu nkurwego rwo gusimbuza (DS), uburemere bwa molekile, ingano yingingo, nuburyo bwo gutunganya. Bimwe mubintu bisanzwe bifatika bya HPStE harimo:

1. Kugaragara: HPStE mubisanzwe ni ifu yera kugeza yera yera hamwe nubunini bwiza bwo gukwirakwiza. Ibice bya morphologie birashobora gutandukana muburyo butandukanye bitewe nuburyo bwo gukora.
2. Ingano ya Particle: Ingano yubunini bwa HPStE irashobora kuva kuri micrometero nkeya kugeza kuri micrometero mirongo, hamwe ningaruka zikomeye kubitandukanya, gukemuka, nibikorwa mumikorere itandukanye.
3. Ubucucike bwinshi: Ubwinshi bwa HPStE bugira ingaruka ku kugenda kwayo, kubiranga, no kubipakira. Ubusanzwe bipimirwa muri garama kuri santimetero kibe (g / cm³) cyangwa kilo kuri litiro (kg / L).
4. Gukemura: HPStE ntishobora gushonga mumazi akonje ariko irashobora gutatana no kubyimba mumazi ashyushye, ikora ibisubizo byijimye cyangwa geles. Imiterere ya hydrata na hydration ya HPStE irashobora gutandukana bitewe nibintu nka DS, uburemere bwa molekile, nubushyuhe.
5. Viscosity: HPStE yerekana kubyimbye no kugenzura imiterere ya sisitemu yo mumazi, bigira ingaruka kumyumvire, imyitwarire itemba, hamwe no gutuza kwimikorere. Ubwiza bwibisubizo bya HPStE biterwa nibintu nko kwibanda, ubushyuhe, nigipimo cyogosha.
6. Igipimo cya Hydration: Igipimo cyamazi ya HPStE bivuga igipimo cyinjiza amazi ikabyimba kugirango kibe igisubizo kibisi cyangwa geles. Uyu mutungo ni ingenzi mubisabwa aho bisabwa kwihuta no kubyimba.

imyiteguro nibintu bifatika bya hydroxypropyl krahisi ether byateganijwe kugirango byuzuze ibisabwa byihariye nibisabwa, bityo bikongerwamo ibintu byinshi kandi bifite agaciro mubikorwa bitandukanye.