Hydroxypropylmethylcellulose (HPMC) sanannen polymer ne da ake amfani da shi a masana'antu kamar su magunguna, gini, abinci da kulawa na sirri. Wani nau'i ne na cellulose da aka gyara wanda aka samu ta hanyar amsa methylcellulose tare da propylene oxide. HPMC fari ne ko fari, mara wari, foda mara daɗi, mai sauƙin narkewa a cikin ruwa, ethanol da sauran kaushi na halitta. Wannan takarda ta tattauna manyan alamun fasaha na HPMC.
danko
Danko shine mafi mahimmancin ginshiƙi na fasaha na HPMC, wanda ke ƙayyade halayen kwarara da aikace-aikacen sa a cikin masana'antu daban-daban. HPMC yana da danko mai yawa, wanda ke nufin yana da kauri, irin nau'in zuma. Ana iya daidaita danko na HPMC ta canza matakin maye gurbin kungiyoyin hydroxyl. Mafi girman matsayi na maye gurbin, mafi girma da danko.
Digiri na canji
Matsayin maye gurbin (DS) wani muhimmin alamar fasaha ne na HPMC, wanda ke nufin adadin ƙungiyoyin hydroxyl da ƙungiyoyin hydroxypropyl da ƙungiyoyin methyl suka maye gurbinsu. DS na HPMC yawanci jeri daga 0.1 zuwa 1.7, tare da DS mafi girma yana nuna babban canji. DS na HPMC yana rinjayar solubility, danko da kaddarorin gel.
nauyin kwayoyin halitta
Nauyin kwayoyin halitta na HPMC kuma muhimmin ma'aunin fasaha ne wanda ke shafar kaddarorinsa na zahiri da na sinadarai kamar solubility, danko, da gelation. HPMC yawanci yana da nauyin kwayoyin halitta daga 10,000 zuwa 1,000,000 Daltons, tare da mafi girman nauyin kwayoyin halitta wanda ke nuna tsawon sarƙoƙi na polymer. The kwayoyin nauyi na HPMC rinjayar ta thickening yadda ya dace, fim kafa ikon da ruwa rike iya aiki.
PH darajar
Ƙimar pH na HPMC shine mahimman ƙididdiga na fasaha wanda ke shafar solubility da danko. HPMC yana narkewa a cikin maganin acidic da alkaline, amma dankonsa ya fi girma a ƙarƙashin yanayin acidic. Ana iya daidaita pH na HPMC ta ƙara acid ko tushe. HPMC yawanci yana da pH tsakanin 4 da 9.
abun ciki danshi
Abubuwan da ke cikin danshi na HPMC shine maƙasudin fasaha mai mahimmanci wanda ke shafar kwanciyar hankali da aikin sarrafawa. HPMC shine hygroscopic, wanda ke nufin yana ɗaukar danshi daga iska. Ya kamata a kiyaye danshi na HPMC ƙasa da 7% don tabbatar da kwanciyar hankali da ingancinsa. Babban abun ciki na danshi zai iya haifar da caking polymer, clumping da lalata.
Asha abun ciki
Abubuwan da ke cikin toka na HPMC shine maƙasudin fasaha mai mahimmanci wanda ke shafar tsabta da ingancin sa. Ash yana nufin ragowar inorganic da aka bari bayan an ƙone HPMC. Abubuwan da ke cikin toka na HPMC yakamata su kasance ƙasa da 7% don tabbatar da tsabta da ingancin sa. Babban abun ciki na toka na iya nuna kasancewar ƙazanta ko gurɓata a cikin polymer.
Gelation zafin jiki
The gel zafin jiki na HPMC ne mai muhimmanci fasaha index cewa rinjayar da gel yi. HPMC na iya yin gel a ƙarƙashin wasu yanayin zafin jiki da yanayi. Za'a iya daidaita yanayin zafin gelation na HPMC ta canza matakin maye gurbin da nauyin kwayoyin halitta. Yawan zafin jiki na HPMC shine 50 zuwa 90 ° C.
a karshe
Hydroxypropylmethylcellulose (HPMC) polymer ne multifunctional tare da kewayon bayani dalla-dalla. Babban alamun fasaha na HPMC sun haɗa da danko, digiri na maye gurbin, nauyin kwayoyin halitta, ƙimar pH, abun ciki na danshi, abun ciki ash, zafin jiki na gelation, da dai sauransu Wadannan alamun fasaha suna shafar kaddarorin jiki da sinadarai na HPMC kuma suna ƙayyade aikinsa a cikin masana'antu daban-daban. Ta hanyar sanin waɗannan ƙayyadaddun bayanai, za mu iya zaɓar nau'in HPMC daidai don takamaiman aikace-aikacen mu kuma tabbatar da ingancinsa da kwanciyar hankali.
Lokacin aikawa: Satumba-04-2023