kumenyekanisha
Ethers ya selulose ni anionic water-soluble polymers ikomoka kuri selile. Izi polymers zifite porogaramu nyinshi mubikorwa bitandukanye nkibiryo, imiti, amavuta yo kwisiga, nubwubatsi bitewe nimiterere yabyo nko kubyimba, gusya, gukora firime, no kwigana. Imwe mu miterere yingenzi ya selile ya selile nubushyuhe bwumuriro wa Tg (Tg), ubushyuhe polymer ikoramo icyiciro cyavuye kuri sol ikajya muri gel. Uyu mutungo ningirakamaro muguhitamo imikorere ya selulose ethers mubikorwa bitandukanye. Muri iki kiganiro, turaganira ku bushyuhe bw’ubushyuhe bwa hydroxypropyl methylcellulose (HPMC), imwe muri ethers ikoreshwa cyane mu nganda.
Ubushyuhe bwo gutwika ubushyuhe bwa HPMC
HPMC nigice cya sintetike ya selulose ether ikoreshwa cyane mubikorwa bitandukanye kubera imiterere yihariye. HPMC irashonga cyane mumazi, ikora ibisubizo bisobanutse neza yibitekerezo bito. Iyo yibanze cyane, HPMC ikora geles ihindurwa no gushyushya no gukonja. Ubushyuhe bwa Thermal HPMC ni intambwe ebyiri zirimo gukora micelles ikurikirwa no kwegeranya micelles kugirango ibe umuyoboro wa gel (Ishusho 1).
Ubushyuhe bwo gukwirakwiza ubushyuhe bwa HPMC buterwa nimpamvu nyinshi nkurwego rwo gusimbuza (DS), uburemere bwa molekile, kwibanda, hamwe na pH yumuti. Muri rusange, hejuru ya DS nuburemere bwa HPMC, nubushyuhe bwo hejuru bwumuriro. Kwishyira hamwe kwa HPMC mubisubizo nabyo bigira ingaruka kuri Tg, uko kwibanda cyane, niko Tg. PH yumuti nayo igira ingaruka kuri Tg, hamwe nibisubizo bya acide bivamo Tg yo hepfo.
Ubushyuhe bwa HPMC burahinduka kandi burashobora guterwa nibintu bitandukanye byo hanze nkimbaraga zogosha, ubushyuhe, hamwe nubunyu bwumunyu. Shear isenya imiterere ya gel ikanagabanya Tg, mugihe ubushyuhe bwiyongera butera gel gushonga kandi bikagabanya Tg. Kongera umunyu mubisubizo nabyo bigira ingaruka kuri Tg, kandi kuba hari cations nka calcium na magnesium byongera Tg.
Gukoresha Tg HPMC itandukanye
Imyitwarire ya thermogelling ya HPMC irashobora guhuzwa na porogaramu zitandukanye. Hasi ya Tg HPMCs ikoreshwa mubisabwa bisaba kwihuta byihuse, nka dessert ako kanya, isosi hamwe nisupu. HPMC ifite Tg ndende ikoreshwa mubisabwa bisaba gutinda cyangwa igihe kirekire, nko gushyiraho uburyo bwo gutanga ibiyobyabwenge, ibinini bisohora, hamwe no kwambara ibikomere.
Mu nganda zibiribwa, HPMC ikoreshwa nkibintu byongera umubyimba, stabilisateur na gelling. Hasi ya Tg HPMC ikoreshwa muburyo bwa dessert isaba gelation yihuse kugirango itange ibyifuzwa hamwe numunwa. HPMC hamwe na Tg ndende ikoreshwa muburyo bwo gukwirakwiza amavuta make aho gutinda cyangwa kumara igihe kirekire bifuza gukumira syneresi no gukomeza imiterere.
Mu nganda zimiti, HPMC ikoreshwa nkumuntu uhuza, udasebanya kandi uhoraho wo kurekura. HPMC ifite Tg ndende ikoreshwa mugutegura ibinini byongerewe-gusohora, aho bisabwa gutinda cyangwa igihe kirekire gusohora ibiyobyabwenge mugihe kinini. Hafi ya Tg HPMC ikoreshwa mugutegura ibinini bisenya umunwa, aho bisabwa gusenyuka byihuse hamwe na gelation kugirango bitange umunwa wifuzwa kandi byoroshye kumira.
mu gusoza
Ubushyuhe bwa ubushyuhe bwa HPMC numutungo wingenzi ugena imyitwarire mubikorwa bitandukanye. HPMC irashobora guhindura Tg yayo murwego rwo gusimbuza, uburemere bwa molekile, kwibanda hamwe na pH agaciro k'igisubizo kugirango uhuze nibisabwa bitandukanye. HPMC hamwe na Tg ntoya ikoreshwa mubisabwa bisaba kwihuta, mugihe HPMC hamwe na Tg ndende ikoreshwa mubisabwa bisaba gutinda cyangwa igihe kirekire. HPMC ni selile itandukanye kandi ihindagurika kandi ifite byinshi ishobora gukoreshwa mubikorwa bitandukanye.
Igihe cyo kohereza: Kanama-24-2023