Phenomonon ye viscosity inodonha panguva yekuchengetedza pendi idambudziko rakajairika, kunyanya mushure mekuchengetedza kwenguva refu, iyo viscosity yePendi inoderedza zvakanyanya, ichikanganisa maitiro ekuvaka uye mhando yechigadzirwa. Kuderera kweVascosity kunoenderana nezvinhu zvakawanda zvine chekuita nezvinhu zvakawanda, zvakadai sekushisa, solvent kusvibiswa, etcer degration, asi kutaurirana nehana cellulose ther inonyanya kutsoropodza.
1. Basa rekutanga re cellulose ether
Cellulose ether ibasa rakajairika rakashandiswa zvakanyanya mumvura-yakavakirwa mvura pendi. Mabasa avo makuru anosanganisira:
Kuita kwakasimba: cellulose ether kunogona kuumba termit matatu-dimensional network network network network network, nekudaro achiwedzera iyo visikopo yehurongwa uye nekuvandudza iyo yeiyo thisxotropy basa rekuvaka.
Kumiswa kweSimba
Firimu-kuumba midziyo: cellulose ether inogona zvakare kukanganisa iyo firimu-yekuumba nzvimbo yependi, ichiita kuti kuunganidza kuve neyakaoma uye kusimba.
Kune marudzi mazhinji emaserylose ana methyl cellelose (hydroxytlosel cellulose (HPMC), etc. Izvi zvigadzirwa zvine simba salubility, kugona kwakasiyana uye kuchengetedza kudzikisira kwemakonzo.
2. Zvikonzero zvikuru zve viscosity kuderedzwa
Munguva yekuchengetedza yejasi, kuderedzwa kwe viscosity kunonyanya kukonzerwa nezvikonzero zvinotevera:
(1) Kusvibiswa kwe cellulose ana
Iko kukonzeresa mhedzisiro ye cellulose ana vana mumatanho zvinoenderana nehukuru hwehukuru hwavo huremu uye kutendeka kwemanyorerwo avo molecular. Munguva yekuchengetedza, zvinhu zvakadai sekupisa, acidity uye alkalinity, uye hutachiona hunogona kukonzera kusvibiswa kwemheremaloose. Semuenzaniso, panguva yekuchengetera kwenguva refu, iyo acidic kana alkaline zvinhu mukuvhara inogona hydrarlar cheni ye cellulose ether, kudzikisa huremu hwayo, uye nekukonzera kuderera kwemasangano.
(2) solvent kulatlilization uye kuseka kutama
Solvent kulatlization kana kuseka kutama muCoating kunogona kukanganisa iyo Solubility State of Cellulose Ether. Munguva yekuchengetedza, chikamu chemvura chinogona kuputika kana kutama kusvika pamusoro pekuvhara, kuita kuti kugoverwa kwemvura muCoating degree yeCellulose Erther uye kukonzera kuderera kwemisangano munzvimbo dzemuno.
(3) microbial kurwiswa
Kukura kwezviyo kunogona kuitika mukubatanidza kana kwachengetedzwa zvisina kufanira kana kuti mishonga inochengetedza isingabatsiri. Mikanaorganisms inogona kuora ma cellulose vaither uye mamwe organic manhara, achineta maitiro avo akashata uye achikonzera iyo yekuvhara yekuvhara kuderera kuderera. Mvura yakavakirwa mvura, kunyanya, inzvimbo yakanaka yekukura kwe microbial nekuti ine huwandu hwakawanda hwemvura.
(4) kupisa kwakanyanya
Pasi pemamiriro ekunze ekuimba ekuchengetedza, chimiro chemuviri kana chemakemikari e cellulose ether molecular cheni inogona kuchinja. Semuenzaniso, cellalose etana inowanzoitika kune oxidation kana pyrolysis pypuricha yakakwirira tembiricha, zvichikonzera kushaya simba kwekushomeka kwemhedzisiro. Tembiricha yakakwirira inowedzerawo solatlization uye mvura yekubuda kwemvura, inoenderera mberi ichikanganisa kugadzikana kwe viscossity.
3. Nzira dzekuvandudza kugadzikana kwekuchengetedza kwejasi
Kuti uderedze kuderera kweVascosity panguva yekuchengetedza uye kuwedzera hupenyu hwekuchengetedza hwekuchera, matanho anotevera anogona kutorwa:
(1) kusarudza iyo chaiyo cellulose ether
Mhando dzakasiyana dze cellulose ethers dzine zviitiko zvakasiyana maererano nekuchengetedza kugadzikana. Cellulose ana ana vana nehuremu hwakanyanya hukuru, asi kugadzikana kwavo kwekuchengetera kwakaringana, asi cellulose ana vana nehuremu hwakaderera hunogona kunge huve hwekuchengetedza kuita. Naizvozvo, pavanenge vachirongedza formula, cellalose ana vana nekuchengetedzeka kwakanaka kwekuchengetedza vanofanirwa kusarudzwa, kana cellulose ana ana ana vana vanofanirwa kuve nedzimwe mitezo yekuvandudza kurwisa kwavo kwekuchengetedza.
(2) dzora iyo pH yekubatanidza
Iyo acidity neayo yeajaya yeiyo inovhara system ine yakakosha pesvedzero pakugadzikana kwemaserulose. Mukugadzira magadzirirwo ekugadzira, iyo pfi kukosha kwekuvhara kunofanirwa kudzorwa kuti udzivise nharaunda yekunyora kana kuti kuderedza kusvibiswa kwe cellulose. Panguva imwecheteyo, kuwedzera huwandu hwakakodzera hwe ph adjuster kana buffer inogona kubatsira kudzikisira iyo pH yeiyo system.
(3) wedzera kushandiswa kweanodzivirira
Kuti udzivise microbial kurongeka, huwandu hwakakodzera hwezvivakwa zvinofanirwa kuwedzerwa kune coating. Vanochengetedza vanokwanisa kundivhiringidza kukura kwehutachiona hwehutachiona, nekudaro kudzivirira zvinhu zvechigungano senge cellulose ether kubva pakuvezwa uye kuchengeta kugadzikana kwekuchengetwa. Zvakakodzera Zvivakwa zvinofanirwa kusarudzwa zvinoenderana neyekubatanidza uye kuchengetedza nharaunda, uye kushanda kwavo kunofanira kuongororwa nguva dzose.
(4) Dzora nharaunda yekuchengetedza
Iyo yekuchengetedza tembiricha uye humidity yekubatanidza ine zvakananga kukanganisa pakugadzikana kwe viscosity. Iyo yekuvhara inofanirwa kuchengetwa munzvimbo yakaoma uye inotonhorera, ichidzivisa kupisa kwakanyanya uye yakakwirira humidity mamiriro ekudzikisa solatlization uye cellulose ther degradation. Mukuwedzera, kurongedza kwakasarudzika kwakasarudzika kunogona kuderedza zvinobudirira kutama uye kubuda kwemvura uye kunonoka kuderera kweViscosity.
4. Zvimwe zvinhu zvinokanganisa viscosity
Kuwedzera kune cellulose ana vanayo, zvimwe zvinhu zviri muhurongwa hwekubatanidza hunogona zvakare kukanganisa shanduko muViscosity. Semuenzaniso, iyo mhando yemifananidzo, iyo mwero wekusimbisa yemhando, uye kuwirirana kwemamwe manhamba kana kuvaparadzira kunogona kukanganisa kutarisisa kwe viscossity yekuvhara. Naizvozvo, kugadzirwa kwakawanda kweiyo coating formula uye kudyidzana pakati pezvikamu zviri zvakare zvakakosha pfungwa dzinoda kutariswa.
Kuderera kweVascosity panguva yekuchengetwa kwekuchengetwa kwakanyatsoenderana nezvinhu zvakadai sekusvibiswa kwemasolose ana manyorerwo, uye solatlization, uye kutama kwemvura. Kuti vandivandudze kugadzikana kwekuchengetedzeka kwekuchengetera, cellucose mherether mhando dzinofanira kusarudzwa, iyo pH yekubatira inofanirwa kudzorwa, matanho ezvipenga anofanirwa kusimbiswa, uye nharaunda yekuchengetedza inofanira kugadzirwa. Kuburikidza nekuremekedza Fomu Dhizaini uye yakanaka yekuchengetedza manejimendi, dambudziko reViscosity kuderera kwekuchengetwa kwekuchengetwa kunogona kuderedzwa nenzira yakakodzera, uye kuitwa kwechigadzirwa uye kukwikwidza kwemusika kunogona kuvandudzwa.
Kutumira Nguva: Sep-27-2024