Hydroxypropylcellulose (HPC) ndi chochokera ku cellulose, polima wachilengedwe wopezeka m'makoma a cellulose. Kupanga kwa hydroxypropylcellulose kumaphatikizapo kusintha kwa mankhwala a cellulose kudzera muzochita zingapo. Kusintha uku kumapereka zinthu za cellulose zomwe zimapangitsa kuti zikhale zothandiza m'mafakitale ndi mankhwala osiyanasiyana.
Kapangidwe ka hydroxypropylcellulose:
Hydroxypropylcellulose ndi hydroxyalkyl yochokera ku cellulose momwe gulu la hydroxypropyl limamangiriridwa ku msana wa cellulose. Msana wa cellulose womwewo ndi mzere wozungulira wa mayunitsi a glucose olumikizidwa ndi ma β-1,4-glycosidic bond. Magulu a Hydroxypropyl amayambitsidwa ndikuchitapo kanthu pa cellulose ndi propylene oxide pamaso pa chothandizira zamchere.
Mlingo wa m'malo (DS) ndi gawo lofunikira lomwe limatanthawuza kapangidwe ka hydroxypropylcellulose. Imayimira kuchuluka kwamagulu a hydroxypropyl pagawo la shuga mu unyolo wa cellulose. DS ikhoza kulamulidwa panthawi ya kaphatikizidwe, kulola kupanga hydroxypropylcellulose ndi magawo osiyanasiyana olowa m'malo kuti akwaniritse zofunikira za ntchito.
Kaphatikizidwe wa hydroxypropylcellulose:
Kaphatikizidwe ka hydroxypropylcellulose kumakhudza zomwe zimachitika pakati pa cellulose ndi propylene oxide. Izi nthawi zambiri zimachitika pamaso pa chothandizira chofunikira monga sodium hydroxide. Zothandizira zamchere zimalimbikitsa kutsegula kwa mphete ya epoxy mu propylene oxide, zomwe zimapangitsa kuti magulu a hydroxypropyl awonjezere ku unyolo wa cellulose.
Zimene zimachitika kawirikawiri ikuchitika mu zosungunulira ndi kutentha ndi anachita nthawi mosamala ankalamulira kukwaniritsa kufunika digiri ya m'malo. Pambuyo anachita, mankhwala amayeretsedwa mwa njira monga kutsuka ndi kusefera kuchotsa reagents unreacted kapena mankhwala.
Makhalidwe a Hydroxypropyl Cellulose:
Kusungunuka: Hydroxypropylcellulose imasungunuka mu zosungunulira zosiyanasiyana, kuphatikizapo madzi, ethanol, ndi zosungunulira zambiri za organic. Izi solubility katundu zimapangitsa kukhala oyenera ntchito zosiyanasiyana.
Viscosity: Kuwonjezera magulu a hydroxypropyl ku cellulose kumawonjezera kusungunuka ndikusintha mawonekedwe a viscosity wa polima. Izi zimapangitsa kuti hydroxypropylcellulose ikhale yofunikira pamapangidwe amankhwala, nthawi zambiri ngati thickening kapena gelling agent.
Kupanga Mafilimu: Hydroxypropylcellulose imatha kupanga mafilimu osinthika komanso owonekera, kuwapangitsa kukhala oyenera zokutira, mafilimu komanso ngati chomangira pamapangidwe a piritsi.
Kukhazikika kwamafuta: Hydroxypropylcellulose imakhala ndi kukhazikika kwamafuta abwino, kulola kuti igwiritsidwe ntchito m'njira zosiyanasiyana zamafakitale popanda kuwonongeka kwakukulu.
Kugwirizana: Imagwirizana ndi ma polima ena osiyanasiyana ndi othandizira, kukulitsa kufunikira kwake pakupanga mankhwala ndi zodzikongoletsera.
Ntchito ya Hydroxypropyl Cellulose:
Mankhwala: Hydroxypropylcellulose amagwiritsidwa ntchito kwambiri m'makampani opanga mankhwala monga chomangira pamapiritsi, chosinthira mamasukidwe amtundu wamtundu wamadzimadzi, komanso chopangira filimu pakupaka pamitundu yamtundu wapakamwa.
Zopangira Zosamalira Munthu: Muzodzoladzola ndi zinthu zosamalira anthu, hydroxypropylcellulose imagwiritsidwa ntchito ngati thickener, stabilizer ndi mafilimu opanga mafilimu muzinthu monga zonona, mafuta odzola ndi tsitsi.
Kugwiritsa Ntchito Mafakitale: Chifukwa cha mawonekedwe ake opanga mafilimu ndi zomatira, hydroxypropylcellulose ingagwiritsidwe ntchito m'mafakitale osiyanasiyana, kuphatikizapo zokutira, zomatira komanso ngati zomangira popanga zolemba zopangidwa.
Makampani a Chakudya: M'makampani azakudya, hydroxypropylcellulose angagwiritsidwe ntchito ngati thickener ndi stabilizer muzakudya zina.
Makampani opanga nsalu: Ma cellulose a Hydroxypropyl atha kugwiritsidwa ntchito m'makampani opanga nsalu ndi mawonekedwe ake opanga mafilimu komanso zomatira kuti athandizire kumaliza kwa nsalu.
Hydroxypropyl cellulose ndi chochokera ku cellulose chosinthidwa chomwe chimagwiritsidwa ntchito kwambiri muzamankhwala, zinthu zosamalira anthu, ndi ntchito zosiyanasiyana zamafakitale chifukwa cha kusungunuka kwake, kusinthika kwa mawonekedwe a viscosity, kuthekera kopanga filimu, komanso kugwirizana ndi ntchito zina. Kusinthasintha kwake komanso kaphatikizidwe koyendetsedwa kumapangitsa kukhala polima wamtengo wapatali pamagwiritsidwe osiyanasiyana.
Nthawi yotumiza: Dec-26-2023