Hydroxypropylcellulose (HPC) chinhu chakakosha cheselulosi chinobva kune chinoshandiswa zvakanyanya muminda yemishonga, chikafu uye zvizorwa. Kushandiswa kwayo mukumiswa kunonyanya kutaridzika, kunyanya kuburikidza nekukora kwayo, kudzikamisa uye kugadzirisa zvivakwa zvekusimudzira kugadzikana kwekumiswa.
Basic properties yehydroxypropylcellulose
Hydroxypropyl cellulose is nonionic cellulose ether inowanikwa nehydroxypropylation ye natural cellulose. A hydrophilic hydroxypropyl boka rinounzwa muchimiro chayo chemakemikari, ichichipa yakanaka solubility uye kukora zvivakwa mumvura. HPC ine zvinotevera maitiro:
Yakanaka solubility: HPC inogona kunyungudika mumvura inotonhora uye inopisa, ichigadzira mhinduro yakajeka uye ine viscous.
Yakakwira biocompatibility: HPC ine yakanaka biocompatibility uye yakaderera muchetura, saka inoshandiswa zvakanyanya mumaindasitiri emishonga uye ezvekudya.
Kugadzikana kwekushisa kwakasimba: HPC ine yakanyanya kugadzikana yekupisa uye inogona kuchengetedza kukora uye kudzikamisa zvivakwa mukati mehumwe tembiricha.
thickening effect
Rimwe remabasa makuru eHPC mukumisikidzwa kuri kukora. Nekuwedzera huwandu hwakakodzera hweHPC kune kumiswa, iyo viscosity yemvura inogona kuwedzera zvakanyanya, nekudaro ichidzikisa kukurumidza kwekugadzirisa kwezvimedu zvakasimba. Zvinoenderana nemutemo weStokes, kumhanya kwekugadzika kwezvimedu kunopesana kune viscosity yemvura. Nokudaro, nekuwedzera viscosity yekumiswa, kugadziriswa kwezvikamu zvinogona kunonoka kunonoka uye kugadzikana kwekumisa kunowedzera.
Iko kukora mhedzisiro yeHPC inonyanya kuuya kubva kune yakakwira molecular huremu uye entanglement mhedzisiro pakati pemacheni. Kana HPC yakanyungudutswa mumvura, mamorekuru marefu-maketani anovhurika uye anopindirana mumwe nemumwe mumhinduro, achigadzira yakaoma network chimiro. Ichi chimiro chetiweki chinogona kuwedzera zvakanyanya viscosity yemhinduro, zvichiita kuti zviome kuti zvimedu zvakasimba zvifambe mumvura, nokudaro zvichivandudza kugadzikana kwekumiswa.
Kudzikamisa mhedzisiro
Rimwe basa rakakosha reHPC nderekuvandudza kugadzikana kwekumiswa. Pamusoro pekuita kwayo kukora, HPC zvakare ine yakanakisa interfacial chiitiko uye kugona kuumba inodzivirira inonamira layer. HPC mamorekuru anogona kuve adsorbed pamusoro pezvakasimba zvimedu kuti zvigadzire inodzivirira glue layer kudzivirira zvimedu kubva mukuungana uye kugadzirisa.
Iyi inodzivirira inonamira layer inodzikamisa iyo kumiswa kuburikidza ne electrostatic repulsion uye steric hindrance mhedzisiro. Kutanga, boka re hydroxypropyl muHPC molecule rinogona kuumba hydrogen zvisungo nemamorekuru emvura, kuwedzera hydrophilicity yechikamu chepamusoro uye kuwedzera kupararira kwezvikamu mumvura. Kechipiri, kuvepo kweHPC mashetani emaketani kuchaita chipingamupinyi chemuviri pane chidimbu chepamusoro, kudzivirira kusangana kwakananga pakati pezvimedu, nekudaro kudzikisa chidimbu kuunganidzwa uye sedimentation.
Solubilization
Iyo solubilizing mhedzisiro yeHPC mukumiswa haigone kufuratirwa. Kune mamwe madhiragi asina kunyungudika kana zvinhu zvinoshanda, HPC inogona kuwedzera kunyungudika kwayo mumvura nekugadzira mamolecular inclusion complexes kana micelles. Boka rehydroxypropyl mumorekuru weHPC rinogona kuumba kudyidzana kusina kusimba (senge hydrogen bond kana van der Waals forces) nemamorekuru asinganyunguriki zvakanaka, zvichivandudza kunyungudika kwawo mumvura.
Kuburikidza neiyi solubilization mhedzisiro, HPC haingogone kuwedzera kunyungudika kwezvinhu zvisina kunyungudika mukumiswa, asi zvakare kuvandudza yavo yunifomu kugovera mumvura, ichiwedzera kugadzikana kwekumisa.
Applications
Muindasitiri yemishonga, HPC inowanzoshandiswa mumhando dzakasiyana dzemishonga yekugadzirira senge kumiswa kwemuromo, jekiseni, uye kugadzirira kwemaziso. Semuenzaniso, mumuromo kumiswa, HPC inogona kuvandudza kumiswa uye kugadzikana kwemushonga, kuve nechokwadi chekuti mushonga haugadzirike panguva yekuchengetedza, nekudaro uchivandudza kushanda uye kuchengetedzwa kwemushonga. Mumajekiseni, HPC inogona kuwedzera bioavailability yemishonga uye kuvandudza kushanda kwavo kuburikidza nesolubilization.
Muindasitiri yechikafu, HPC inowanzo shandiswa mumiti yekumisa senge majusi, zvigadzirwa zvemukaka uye condiments. HPC inogona kuvandudza viscosity uye kugadzikana kwekumiswa, kudzivirira kugadzirisa uye stratification yezvimedu zvakasimba, uye ive nechokwadi chekufanana uye kuravira kwechigadzirwa.
Hydroxypropylcellulose inoita basa rakakosha mukusimudzira kugadzikana kwekumisa. Kuburikidza nekukora kwayo, kudzikamisa uye solubilizing zvivakwa, HPC inogona kuwedzera zvakanyanya viscosity yekumisikidza, kuderedza kumhanya kwekugadzirisa kwezvimedu zvakasimba, kugadzira inodzivirira glue layer kudzivirira kuunganidzwa kwezvikamu, uye kuwedzera kunyungudika kwezvinhu zvisinganyunguriki. Izvi zvivakwa zvinoita kuti HPC ishandiswe zvakanyanya muminda yemishonga, chikafu uye zvizorwa, ichiva chinhu chakakosha chekuvandudza kugadzikana kwekumiswa.
Nguva yekutumira: Jul-21-2024