1. Abubuwan asali na HPMC
Hydroxypropyl methylcellulose (HPMC)ne nonionic cellulose ether da aka yi amfani da ko'ina a cikin kayan gini, magani, abinci, kayan shafawa da sauran masana'antu. Kaddarorinsa na musamman na physicochemical, irin su solubility, thickening, samar da fim da kaddarorin thermal gelation, sun sanya shi muhimmin sashi a aikace-aikacen masana'antu da yawa. Zazzabi yana daya daga cikin manyan abubuwan da ke shafar aikin HPMC, musamman ma dangane da solubility, danko, thermal gelation da thermal kwanciyar hankali.
2. Sakamakon zafin jiki akan solubility na HPMC
HPMC shine polymer mai narkewa mai saurin juyewa, kuma narkewar sa yana canzawa tare da zafin jiki:
Yanayin ƙananan zafin jiki (ruwa mai sanyi): HPMC yana da sauƙin narkewa a cikin ruwan sanyi, amma zai sha ruwa kuma ya kumbura lokacin da ya fara tuntuɓar ruwa don samar da ƙwayoyin gel. Idan motsawa bai isa ba, lumps na iya yin kullu. Sabili da haka, yawanci ana ba da shawarar ƙara HPMC a hankali yayin motsawa don haɓaka watsawa iri ɗaya.
Matsakaici zazzabi (20-40 ℃): A cikin wannan zafin jiki kewayon, HPMC yana da kyau solubility da high danko, kuma ya dace da daban-daban tsarin da bukatar thickening ko stabilization.
Babban zafin jiki (sama da 60 ° C): HPMC yana da wuyar samar da gel mai zafi a babban zafin jiki. Lokacin da yawan zafin jiki ya kai takamaiman zazzabi na gel, maganin zai zama mara kyau ko ma coagulate, yana shafar tasirin aikace-aikacen. Misali, a cikin kayan gini kamar turmi ko foda, idan zafin ruwa ya yi yawa, HPMC ba za a iya narkar da shi yadda ya kamata ba, don haka yana shafar ingancin ginin.
3. Tasirin zafin jiki akan danko na HPMC
Zazzaɓi yana shafar danko na HPMC sosai:
Ƙara yawan zafin jiki, raguwar danko: Dankin maganin HPMC yawanci yana raguwa tare da ƙara yawan zafin jiki. Misali, dankowar wani bayani na HPMC na iya zama babba a 20°C, yayin da a 50°C, danko zai ragu sosai.
Zazzabi yana raguwa, danko yana farfadowa: Idan an sanyaya maganin HPMC bayan dumama, dankowar sa zai iya farfadowa a wani bangare, amma maiyuwa ba zai iya komawa gaba daya zuwa yanayin farko ba.
HPMC na maki daban-daban danko suna nuna hali daban: babban danko HPMC ya fi kula da canje-canjen zafin jiki, yayin da HPMC mai ƙarancin danko yana da ƙarancin ɗanƙoƙi lokacin da zafin jiki ya canza. Don haka, yana da mahimmanci musamman don zaɓar HPMC tare da ɗanko mai kyau a cikin yanayin aikace-aikacen daban-daban.
4. Sakamakon zafin jiki akan thermal gelation na HPMC
Wani muhimmin sifa na HPMC shine gelation thermal, wato, lokacin da zafin jiki ya tashi zuwa wani matakin, maganinsa zai juya zuwa gel. Yawanci ana kiran wannan zafin jiki da zafin jiki. Daban-daban na HPMC suna da yanayin zafi daban-daban, gabaɗaya tsakanin 50-80 ℃.
A cikin masana'antun abinci da magunguna, ana amfani da wannan sifa ta HPMC don shirya magunguna masu ɗorewa ko kayan abinci.
A cikin aikace-aikacen gine-gine, irin su ciminti turmi da kuma sa foda, thermal gelation na HPMC na iya ba da ajiyar ruwa, amma idan yanayin yanayin gini ya yi yawa, gelation na iya rinjayar aikin ginin.
5. Sakamakon zafin jiki akan kwanciyar hankali na thermal na HPMC
Tsarin sinadarai na HPMC yana da ɗan kwanciyar hankali a cikin kewayon zafin da ya dace, amma ɗaukar dogon lokaci zuwa babban zafin jiki na iya haifar da lalacewa.
Babban zafin jiki na ɗan gajeren lokaci (kamar dumama nan take zuwa sama da 100 ℃): maiyuwa ba zai shafi kaddarorin sinadarai na HPMC ba sosai, amma yana iya haifar da canje-canje a kaddarorin jiki, kamar raguwar danko.
Babban zafin jiki na dogon lokaci (kamar ci gaba da dumama sama da 90 ℃): na iya haifar da sarkar kwayar halitta ta HPMC ta karye, wanda ke haifar da raguwar da ba za a iya jurewa ba a cikin danko, yana shafar kauri da kaddarorin fim.
Matsanancin zafin jiki (fiye da 200 ℃): HPMC na iya fuskantar bazuwar thermal, sakin abubuwa marasa ƙarfi kamar methanol da propanol, kuma yana haifar da kayan don canza launin ko ma carbonize.
6. Shawarwari na aikace-aikacen don HPMC a cikin yanayin zafi daban-daban
Domin ba da cikakken wasa ga aikin HPMC, yakamata a ɗauki matakan da suka dace bisa ga yanayin yanayin zafi daban-daban:
A cikin ƙananan yanayin zafi (0-10 ℃): HPMC narke sannu a hankali, kuma ana bada shawara don narkar da shi a cikin ruwan dumi (20-40 ℃) kafin amfani.
A cikin yanayin zafin jiki na al'ada (10-40 ℃): HPMC yana da ingantaccen aiki kuma ya dace da yawancin aikace-aikacen, kamar su sutura, turmi, abinci da abubuwan haɓaka magunguna.
A cikin yanayin zafi mai girma (sama da 40 ℃): Ka guji ƙara HPMC kai tsaye zuwa ruwa mai zafin jiki. Ana ba da shawarar a narkar da shi a cikin ruwan sanyi kafin dumama shi, ko zaɓi HPMC mai tsananin zafin jiki don rage tasirin thermal gelation akan aikace-aikacen.
Zazzabi yana da tasiri mai mahimmanci akan solubility, danko, thermal gelation da thermal kwanciyar hankali naHPMC. A yayin aiwatar da aikace-aikacen, ya zama dole a zaɓi samfuri da hanyar amfani da HPMC bisa ga ƙayyadaddun yanayin zafin jiki don tabbatar da ingantaccen aikin sa. Fahimtar yanayin zafin jiki na HPMC ba zai iya haɓaka ingancin samfur kawai ba, har ma da guje wa asarar da ba dole ba ta haifar da canjin zafin jiki da haɓaka haɓakar samarwa da fa'idodin tattalin arziki.
Lokacin aikawa: Maris 28-2025