IHydroxypropylmethylcellulose (HPMC) yimveliso yecellulose esetyenziswa kakhulu kumashishini ahlukeneyo.Olona setyenziso luphambili lwe-HPMC zizinto ezityebisayo, zizinzisi kunye nezithambiso kumashishini okutya, amayeza kunye nezokuthambisa.I-HPMC ikwasetyenziswa kwicandelo lolwakhiwo njengesongezelelo sesamente, njengento yokugquma iipilisi neecapsules, nanjengesisombululo samehlo.Eyona mathiriyeli ekrwada ye-HPMC yi-cellulose kunye ne-reagents yeekhemikhali.
ISelulosi:
I-Cellulose yeyona nto iphambili kwimveliso ye-HPMC.I-Cellulose yipolymer yendalo efumaneka kwiindonga zeeseli zezityalo kwaye yeyona polymer yendalo ininzi emhlabeni.Iimpawu zeekhemikhali zeselulosi zifana ne-HPMC, eyenza ibe yinto efanelekileyo ekrwada kwimveliso ye-HPMC.I-cellulose ithathwa kwimithombo eyahlukeneyo, kuquka iinkuni, umqhaphu, kunye nezityalo ezahlukeneyo.
Owona mthombo uxhaphakileyo weselulosi osetyenziswa kwimveliso ye-HPMC yintlama yeenkuni.I-pulp yomthi ithathwe kwi-softwoods efana ne-spruce, ipine kunye ne-fir.Intlaka yeenkuni inyangwa ngokwekhemikhali ukuqhekeza i-lignin kunye ne-hemicellulose, ishiya i-cellulose ecocekileyo.I-cellulose ecocekileyo iye ifakwe ibleach kwaye ihlanjwe ukususa nakuphi na ukungcola.
Iselulosi esetyenziselwa ukuveliswa kwe-HPMC kufuneka ibe kumgangatho ophezulu kwaye amanyathelo okulawula umgangatho ongqongqo kufuneka alandelwe ukuqinisekisa ukucoceka kweselulosi.Ukucoceka kweselulosi kubalulekile njengoko ukungcola kunokuchaphazela iipropati zemveliso yokugqibela.
Iirejenti zeekhemikhali:
Ukuveliswa kwe-HPMC kufuna ukusetyenziswa kweerejenti zeekhemikhali ezahlukeneyo.Ii-reagents zeMichiza ezisetyenziselwa ukuveliswa kwe-HPMC ziquka i-propylene oxide, i-methyl chloride, i-sodium hydroxide, i-hydrochloric acid, njl.
Ipropylene oxide isetyenziselwa ukuvelisa i-hydroxypropyl cellulose (HPC), ethi emva koko isetyenziswe nge-methyl chloride ukuvelisa i-HPMC.I-HPC idibana ne-methyl chloride ukuze ithathe indawo yamanye amaqela e-hydroxyl kwikhonkco leselulosi ngamaqela e-methoxy kunye ne-hydroxypropyl, ngokwenza njalo yenze i-HPMC.
I-sodium hydroxide isetyenziselwa ukuveliswa kwe-HPMC ukunyusa ixabiso le-pH yesisombululo sokusabela ukunceda ukunyibilikisa i-cellulose.
Ngethuba lenkqubo yokuvelisa i-HPMC, i-hydrochloric acid isetyenziselwa ukunyenyisa ixabiso le-pH yesisombululo sokusabela.
I-reagents yeMichiza esetyenziswa kwimveliso ye-HPMC kufuneka ibe nobunyulu obuphezulu, kwaye iimeko zokusabela kufuneka zilawulwe ngononophelo ukuze kuqinisekiswe umgangatho wemveliso yokugqibela.
ukuququmbela:
Eyona mathiriyeli ekrwada ye-HPMC yi-cellulose kunye ne-reagents yeekhemikhali.I-Cellulose, ephuma kwimithombo eyahlukeneyo ebandakanya iinkuni, umqhaphu, kunye nezityalo ezahlukeneyo, yimathiriyeli ekrwada yokuqala yokuveliswa kwe-HPMC.Ii-reagents zeMichiza ezisetyenziswa kwimveliso ye-HPMC ziquka ipropylene oxide, i-methyl chloride, i-sodium hydroxide kunye ne-hydrochloric acid.Ukuveliswa kwe-HPMC kufuna amanyathelo angqongqo olawulo lomgangatho ukuqinisekisa ukucoceka kwezinto ezikrwada kunye nomgangatho wemveliso yokugqibela.I-HPMC isetyenziswa ngokubanzi kumashishini ahlukeneyo kwaye inoluhlu olubanzi lwezicelo ngenxa yeempawu zayo ezizodwa.
Ixesha lokuposa: Sep-06-2023