I-low-substituted hydroxypropyl cellulose (L-HPC) iphuma ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo. I-L-HPC ishintshiwe ukuze ithuthukise ukunyibilika kwayo nezinye izakhiwo, iyenze ibe yinto eguquguqukayo enezicelo eziningi ezimbonini zemithi, zokudla, nezimonyo.
I-Low-substituted hydroxypropylcellulose (L-HPC) iphuma endaweni ephansi ye-cellulose eshintshiwe ngokuyinhloko ukuze kuthuthukiswe ukunyibilika kwayo emanzini nakwezinye izincibilikisi. I-Cellulose iyi-polysaccharide ewumugqa eyakhiwe amayunithi e-glucose eningi ngokwemvelo futhi iyingxenye yesakhiwo sezindonga zamaseli ezitshalo. I-L-HPC ihlanganiswa nge-cellulose eshintsha amakhemikhali, yethula amaqembu e-hydroxypropyl ukuze ithuthukise ukunyibilika kwayo kuyilapho igcina ezinye zezinto ezifiselekayo ze-cellulose.
Isakhiwo samakhemikhali se-low-substituted hydroxypropyl cellulose
Isakhiwo samakhemikhali se-L-HPC siqukethe umgogodla we-cellulose kanye neqembu le-hydroxypropyl elixhunywe eqenjini le-hydroxyl (OH) leyunithi ye-glucose. I-degree of substitution (DS) ibhekisela enanini eliyisilinganiso lamaqembu e-hydroxypropyl ngeyunithi ngayinye ye-glucose ochungechungeni lwe-cellulose. Ku-L-HPC, i-DS igcinwa iphansi ngamabomu ukuze kulinganiswe ukunyibilika okuthuthukisiwe nokugcina izakhiwo ze-cellulose.
Ukwenziwa kwe-low-substituted hydroxypropyl cellulose
Ukuhlanganiswa kwe-L-HPC kuhilela ukusabela kwe-cellulose nge-propylene oxide phambi kwe-catalyst ye-alkali. Lokhu kusabela kuholela ekwethulweni kwamaqembu e-hydroxypropyl kumaketango e-cellulose. Ukulawula ngokucophelela izimo zokusabela, okuhlanganisa izinga lokushisa, isikhathi sokusabela, nokugxilisa ingqondo kwe-catalyst, kubalulekile ukuze kuzuzwe izinga elifiswayo lokushintsha.
Izinto ezithinta ukuncibilika
1. Iziqu zokushintsha (DS):
I-solubility ye-L-HPC ithintwa i-DS yayo. Njengoba i-DS ikhula, i-hydrophilicity yeqembu le-hydroxypropyl iba sobala kakhulu, ngaleyo ndlela ithuthukise ukuncibilika emanzini kanye nezincibilikisi ze-polar.
2. Isisindo samangqamuzana:
Isisindo samangqamuzana e-L-HPC singesinye isici esibalulekile. Isisindo samangqamuzana aphezulu i-L-HPC ingase ibonise ukuncibilika okuncishisiwe ngenxa yokwanda kokuxhumana kwama-intermolecular kanye nokuthandelwa kweketango.
3. Izinga lokushisa:
Ukuncibilika ngokuvamile kukhuphuka ngezinga lokushisa ngenxa yokuthi amazinga okushisa aphezulu anikeza amandla engeziwe ukuze aphule amandla e-intermolecular futhi akhuthaze ukusebenzisana kwe-polymer-solvent.
4. Inani le-pH lesisombululo:
I-pH yesisombululo ithinta i-ionization yamaqembu e-hydroxypropyl. Kwezinye izimo, ukulungisa i-pH kungase kwenyuse ukunyibilika kwe-L-HPC.
5. Uhlobo lwe-solvent:
I-L-HPC ikhombisa ukuncibilika okuhle emanzini nasezincibilikisini ezihlukahlukene ze-polar. Ukukhethwa kwe-solvent kuncike ekusetshenzisweni okuqondile kanye nezakhiwo ezifunwayo zomkhiqizo wokugcina.
Ukusetshenziswa kwe-cellulose ephansi efakwe esikhundleni se-hydroxypropyl
1. Izidakamizwa:
I-L-HPC isetshenziswa kakhulu embonini yezemithi njenge-binder, i-disintegrant kanye ne-ejenti yokukhululwa elawulwayo ekwakhiweni kwethebhulethi. Ukuncibilika kwayo oketshezini lwamathumbu kuyenza ifaneleke izicelo zokulethwa kwezidakamizwa.
2. Imboni yokudla:
Embonini yokudla, i-L-HPC isetshenziswa njenge-thickener kanye ne-stabilizer emikhiqizweni ehlukahlukene. Ikhono layo lokwenza ijeli elicacile ngaphandle kokuthinta ukunambitheka noma umbala wemikhiqizo yokudla kwenza kube yigugu ekwakhiweni kokudla.
3. Izimonyo:
I-L-HPC isetshenziswa ekwenziweni kwezimonyo ngenxa yezakhiwo zayo zokwakheka kwefilimu nokujiya. Isiza ukuthuthukisa ukuzinza kanye nokuthungwa kwezimonyo ezifana nokhilimu, izinto zokugcoba namajeli.
4. Isicelo sokumboza:
I-L-HPC ingasetshenziswa njengento yokumboza ifilimu ezimbonini zemithi nezokudla ukuze kuhlinzekwe isendlalelo sokuvikela amaphilisi noma imikhiqizo ye-confectionery.
I-low-substituted hydroxypropyl cellulose iyi-polymer esebenza ngezindlela eziningi enokuncibilika okuthuthukisiwe etholakala ku-cellulose yemvelo etholakala ezitshalweni. Izakhiwo zayo eziyingqayizivele ziyenza ibe yigugu ezimbonini ezihlukahlukene ezihlanganisa ezemithi, ukudla nezimonyo. Ukuqonda izici ezithonya ukunyibilika kwayo kubalulekile ekuthuthukiseni ukusetshenziswa kwayo ezinhlelweni ezihlukene. Njengoba ucwaningo nentuthuko yesayensi ye-polymer iqhubeka, i-L-HPC nokunye okuphuma ku-cellulose okufanayo kungathola izinhlelo zokusebenza ezintsha nezintsha emikhakheni eminingi.
Isikhathi sokuthumela: Dec-26-2023