Hydroxypropyl cellulose (L-HPC) inotorwa kubva ku cellulose, polymer yechisikigo inowanikwa mumadziro emasero emiti. L-HPC yakagadziriswa kuti iwedzere kunyungudika kwayo nezvimwe zvinhu, zvichiita kuti ive chinhu chinoshandiswa zvakasiyana-siyana uye chinoshandiswa kakawanda muindasitiri yemishonga, chikafu, uye cosmetic.
Hydroxypropylcellulose (L-HPC) imhando ye cellulose inotsiva zvishoma yakagadziriswa zvakanyanya kuti ivandudze kunyungudika kwayo mumvura nezvimwe zvinonyungudutsa. Cellulose ipolysaccharide yakaumbwa nemayuniti eglucose akawanda uye inhengo yemadziro emasero emiti. L-HPC inogadzirwa nekushandisa makemikari kugadzirisa cellulose, ichiunza mapoka ehydroxypropyl kuti iwedzere kunyungudika kwayo uku ichichengetedza zvimwe zvezvinhu zvinodiwa zve cellulose.
Maumbirwo emakemikari ehydroxypropyl cellulose isingatsiviwe zvakanyanya
Maumbirwo emakemikari eL-HPC ane muzongoza we cellulose neboka re hydroxypropyl rakabatana neboka re hydroxyl (OH) re glucose unit. Dhigirii rekutsiva (DS) rinoreva huwandu hweavhareji yemapoka e hydroxypropyl pa glucose unit mu cellulose chain. MuL-HPC, DS inochengetwa yakaderera nemaune kuti ienzanise kunyungudika kwakavandudzwa nekuchengetedza hunhu hwemukati hwe cellulose.
Kugadzirwa kwehydroxypropyl cellulose ine substituted low-substituted
Kugadzirwa kweL-HPC kunosanganisira kuita kwe cellulose ne propylene oxide kana paine alkaline catalyst. Kuita uku kunoguma nekuiswa kwe hydroxypropyl groups mumaketani e cellulose. Kudzora mamiriro e reaction nekungwarira, kusanganisira tembiricha, nguva ye reaction, uye catalyst concentration, zvakakosha kuti uwane mwero waunoda wekutsiva.
Zvinhu zvinokanganisa kunyungudika
1. Dhigirii rekutsiva (DS):
Kunyungudika kweL-HPC kunokanganiswa neDS yayo. Sezvo DS ichiwedzera, hydrophilicity yeboka rehydroxypropyl inowedzera kuoneka, nokudaro zvichivandudza kunyungudika mumvura uye muzvinhu zvinonyungudutsa pasi pemvura.
2. Kurema kwemamorekuru:
Huremu hwemamorekuru eL-HPC chimwe chinhu chakakosha. Huremu hwakawanda hwemamorekuru L-HPC hunogona kuratidza kudzikira kwekunyungudika nekuda kwekuwedzera kwekudyidzana pakati pemamorekuru uye kupindirana kwemaketani.
3. Kupisa:
Kunyunguduka kunowanzowedzera nekupisa nekuti tembiricha yakakwira inopa simba rakawanda rekuputsa masimba epakati pemamorekuru uye kukurudzira kudyidzana kwepolymer-solvent.
4. pH kukosha kwemushonga:
pH yemushonga inokanganisa ionization yemapoka ehydroxypropyl. Mune zvimwe zviitiko, kugadzirisa pH kunogona kuwedzera kunyungudika kweL-HPC.
5. Rudzi rwechinonyungudutsa:
L-HPC ine kunyungudika kwakanaka mumvura uye mune zvakasiyana-siyana zvinonyungudutsa polar. Sarudzo yechinhu chinonyungudutsa inoenderana nekushandiswa kwacho uye hunhu hwaunoda hwechigadzirwa chekupedzisira.
Kushandiswa kwehydroxypropyl cellulose isingatsiviwi zvakanyanya
1. Mishonga:
L-HPC inoshandiswa zvakanyanya muindasitiri yemishonga semushonga wekubatanidza, kubvisa mishonga uye unodzorwa mukugadzirwa kwemapiritsi. Kunyungudika kwayo mumvura dzemudumbu kunoita kuti ikodzere kushandiswa mukutumira mishonga.
2. Indasitiri yezvekudya:
Muindasitiri yechikafu, L-HPC inoshandiswa sechinhu chinosimbisa uye chinosimbisa muzvigadzirwa zvakasiyana-siyana. Kukwanisa kwayo kugadzira gel yakajeka pasina kukanganisa kunaka kana ruvara rwezvigadzirwa zvekudya kunoita kuti ive yakakosha mumafomura echikafu.
3. Zvizoro:
L-HPC inoshandiswa mukugadzira zvishongo nekuda kwehunhu hwayo hwekugadzira firimu nekukora. Inobatsira kuvandudza kugadzikana uye magadzirirwo ezvigadzirwa zvezvizoro zvakaita semakirimu, mafuta ekuisa mafuta uye majeli.
4. Kushandiswa kwekuputira:
L-HPC inogona kushandiswa sechinhu chinofukidza ganda mumaindasitiri emishonga nezvekudya kuti ipe chidziviriro chemapiritsi kana zvigadzirwa zvemaswiti.
Hydroxypropyl cellulose isingatsiviwe zvakanyanya ipolymer inoshanda zvakawanda ine kunyungudika kwakawedzerwa kunobva mu cellulose yechisikigo inowanikwa mumiti. Hunhu hwayo hwakasiyana hunoita kuti ive yakakosha mumaindasitiri akasiyana-siyana anosanganisira mishonga, chikafu uye zvizoro. Kunzwisisa zvinhu zvinopesvedzera kunyungudika kwayo kwakakosha pakuvandudza kushandiswa kwayo mumashandisirwo akasiyana. Sezvo tsvakiridzo nekuvandudzwa kwesainzi yepolymer zvichienderera mberi, L-HPC nezvimwe zvakafanana zve cellulose zvinogona kuwana mashandisirwo matsva uye matsva munzvimbo dzakasiyana-siyana.
Nguva yekutumira: Zvita-26-2023