Shiri da kaddarorin jiki na hydroxypropyl sitaci ether

Hydroxypropyl starch ether (HPStE) an shirya shi ta hanyar tsarin gyara sinadarai wanda ya haɗa da gabatar da ƙungiyoyin hydroxypropyl akan kwayoyin sitaci. Hanyar shiri yawanci ta ƙunshi matakai masu zuwa:

1. Zaɓin sitaci: An zaɓi sitaci mai inganci, yawanci ana samo shi daga tushe kamar masara, alkama, dankalin turawa, ko tapioca, azaman kayan farawa. Zaɓin tushen sitaci na iya yin tasiri ga kaddarorin samfurin HPStE na ƙarshe.
2. Shiri Taurari Manna: Zaɓaɓɓen sitaci yana tarwatse a cikin ruwa don samar da man sitaci. Ana ƙona manna zuwa takamaiman zafin jiki don gelatinize granules sitaci, yana ba da damar mafi kyawun sake kunnawa da shigar da reagents a cikin matakan gyara na gaba.
3. Etherification Reaction: Gelatinized sitaci manna ana amsawa tare da propylene oxide (PO) a gaban mai kara kuzari a ƙarƙashin yanayin sarrafawa. Propylene oxide yana amsawa tare da ƙungiyoyin hydroxyl (-OH) akan ƙwayar sitaci, yana haifar da haɗewar ƙungiyoyin hydroxypropyl (-OCH2CH (OH) CH3) zuwa kashin bayan sitaci.
4. Neutralization da tsarkakewa: Bayan etherification dauki, da dauki cakuda ne neutralized don cire duk wani wuce haddi reagents ko kara kuzari. Sakamakon hydroxypropyl sitaci ether ana tsarkake shi ta hanyar matakai kamar tacewa, wankewa, da bushewa don cire ƙazanta da sauran sinadarai.
5. Daidaita Girman Barbashi: Kaddarorin jiki na HPStE, kamar girman barbashi da rarrabawa, ana iya daidaita su ta hanyar niƙa ko niƙa don cimma halayen da ake so don takamaiman aikace-aikace.

Kaddarorin jiki na hydroxypropyl sitaci ether na iya bambanta dangane da dalilai kamar matakin maye gurbin (DS), nauyin kwayoyin halitta, girman barbashi, da yanayin sarrafawa. Wasu gama-gari na zahiri na HPSTE sun haɗa da:

1. Bayyanar: HPStE yawanci fari ne zuwa fari-fari tare da rarraba girman barbashi mai kyau. Halin halittar barbashi na iya bambanta daga mai siffar zobe zuwa siffofi marasa tsari dangane da tsarin masana'anta.
2. Barbashi Girman: The barbashi Girman HPStE iya jeri daga 'yan micrometers zuwa dubun micrometers, tare da gagarumin tasiri a kan ta dispersibility, solubility, da kuma ayyuka a daban-daban aikace-aikace.
3. Girman Girma: Girman yawa na HPStE yana tasiri iyawar sa, halayen sarrafawa, da buƙatun marufi. Yawanci ana auna shi a cikin gram kowane centimita kubik (g/cm³) ko kilogiram a kowace lita (kg/L).
4. Solubility: HPStE ba shi da narkewa a cikin ruwan sanyi amma yana iya tarwatsawa da kumbura a cikin ruwan zafi, yana samar da mafita ko gels. Solubility da kaddarorin ruwa na HPStE na iya bambanta dangane da abubuwa kamar DS, nauyin kwayoyin halitta, da zafin jiki.
5. Dankowa: HPStE yana nuna kauri da kaddarorin sarrafa rheological a cikin tsarin ruwa, yana tasiri danko, dabi'ar kwarara, da kwanciyar hankali na tsari. Dankowar hanyoyin HPStE ya dogara da dalilai kamar su maida hankali, zafin jiki, da ƙimar ƙarfi.
6. Yawan Ruwa: Matsakaicin hydration na HPStE yana nufin adadin da yake sha ruwa da kumbura don samar da mafita ko gels. Wannan kadarar tana da mahimmanci a aikace-aikace inda ake buƙatar saurin ruwa da kauri.

shirye-shiryen da kaddarorin jiki na hydroxypropyl sitaci ether an kera su don saduwa da takamaiman buƙatun aikace-aikacen da ƙa'idodin aiki, yana mai da shi ƙari mai mahimmanci kuma mai mahimmanci a cikin masana'antu da ƙira.