Iyini inqubo yokukhiqiza nokwakhiwa kwe-cellulose ether?

I-Cellulose Ether iyindawo eyi-polymer enesakhiwo se-ether eyenziwe nge-cellulose. I-Glucosyl Ring ngayinye ku-CelLose Macromolecule iqukethe amaqembu amathathu e-hydroxyl, iqembu eliyisisekelo le-hydroxyl eqenjini lesithupha le-carbon, futhi i-hydrogen eqenjini le-hydroxbon lithathelwa indawo yi-veldrocarbon group ukukhiqiza izinto ezivela komoya.

Ukusetshenziswa kwe-cellulose ether

1. Ukwakha Ibanga le-Cellulose Ether

I-Cellulose Ether yaziwa ngokuthi "i-monosodium yezimboni i-glutamate". Ngenxa yokuqina kwayo okuhle kakhulu, ukugcinwa kwamanzi kanye nokubuyisa izakhiwo, kusetshenziswa kabanzi ukuthuthukisa nokwandisa udaka olulodwa olumiswe ngodaka, ukukhiqizwa kwe-PVC resin, i-latex paint, i-putty point ukusebenza komkhiqizo wokwakha. Ngenxa yokuthuthukiswa kweleveli yezwe lasekuqaleni izwe, ukuthuthukiswa okusheshayo kwemikhakha yokwakha, kanye nokuthuthuka okwandayo kwemvelo kwabathengi bezimali zokwakha kuqhubelwe isidingo se-Nonic Cellulose Afers.

2. Ibanga le-cellulose ether

I-Cellulose Afers isetshenziswa kabanzi embonweni wefilimu, anamathela, amafilimu amakhamisha, ama-ointrements, ama-dispersants, ama-caplule yemifino, amalungiselelo okukhishwa alawulwa kanye neminye imikhakha yemithi yemithi. Njenge-Skeleton Ether, i-Celsulose Ether inemisebenzi yokwandisa isikhathi somsebenzi wezidakamizwa futhi sithuthukise ukuhlakazeka kwezidakamizwa kanye nokuchithwa; Njenge-capsule kanye ne-coating, kungakugwema ukucekelwa phansi nokuxhumanisa nokuxhumanisa nokuvuselela ukuphendula, futhi kungukusebenza okubalulekile okungafani kokukhiqizwa kwe-excipieticals. Ubuchwepheshe bohlelo lokusebenza lwebanga le-celsulose ether buvuthiwe emazweni athuthukile.

3. Ibanga le-cellulose ether

I-ether ye-cellulose yebanga lokudla yisengezo sokudla esiphephile. Ingasetshenziswa njengokudla okuphakathi, i-stabilizer kanye ne-moisturizer ukuqina, ukugcina amanzi, futhi kuthuthukise ukunambitheka. Kusetshenziswa kabanzi emazweni athuthukile, ikakhulukazi ekudleni kokudla, ama-collagen ama-casings, ukhilimu ongewona ubisi, amajusi wezithelo, amasoso, inyama neminye imikhiqizo yamaprotheni, ukudla okuthosiwe, njll.

Inqubo Yokukhiqiza I-Cellulose Ether

1. I-Hydroxyyethyl methylcellulose

Indlela yokulungiselela ye-hydroxyyethyl methylcellulose, indlela ukusebenzisa ukotini okucwengiwe njengento eluhlaza kanye ne-ethylene oxide njenge-ejenti yokuthezeka ukuze alungiselele i-hydroxyethyll methylcellulose. Izingxenye zesisindo zezinto zokusetshenziswa zokulungiselela i-hydroxyethyllllllls zimi ngalendlela elandelayo: Izingxenye ezingama-700-800 ze-soluium hydroxide, izingxenye ezingama-80-8-90 ze-solvent, ama-cling ama-chlodia, ama-80-90 wezingxenye ze-methyl, 16-19 izingxenye ze-glacial i-acetic acid; Izinyathelo ezithile yilezi:

Isinyathelo sokuqala, eKettele yokuphendula, engeza ingxube ye-toluene ne-isopropanol, amanzi, ne-sodium hydroxide, ukushisa kuze kube ngu-60-80 ° C, gcina ukufudumala imizuzu engama-20 ukuya kwengama-40;

Isinyathelo sesibili, i-alkalization: pholisa izinto ezingenhla ziye ku-30-50 ° C, engeza ukotini ocwengekile, fafaza i-nitrogen ne-gcwalisa i-nitrogen ukuze ungene esikhundleni se-3, bese ugcwalisa i-alkali ngemuva kokubuyiselwa. I-Alkalinization, izimo ze-alkalization yilezi: Isikhathi soku-Alkalization singamahora ama-2, izinga lokushisa le-alkalization lingu-30 ℃ 50 ℃;

Isinyathelo sesithathu, ukuphuma kwe-alkalization sekuphothuliwe, i-reactorization ikhishwe ku-0.05-0.07MPA, ne-ethylele oxide kanye ne-methyl chloride yengezwa imizuzu engama-30-50; Isigaba sokuqala sokuthezeka: 40-60 ° C, 1.0-2.0 amahora, ingcindezi ilawulwa phakathi kuka-0.150.3MPA; isigaba sesibili sokuthezeka: 60 ~ 90 ℃, amahora angama-2.0 ~ ama-2,5, ingcindezi ilawulwa phakathi kuka-0.40.8MPA;

Isinyathelo sesine, ukungathathi hlangothi: engeza i-glacial acetic acetic acid kusengaphambili i-kettle yezulu, cindezela okushisa kuya ku-75-80 ° C ukuthola i-102 ° C, nenani le-PH defolventization liphothuliwe; Ithangi le-decolventization ligcwele amanzi angama-90 ℃ ~ 100 ℃ Thinta amanzi ephethwe yidivaysi yokubuyisela emuva kwe-Osmosis;

Isinyathelo sesihlanu, ukugeza izingxenye: Izinto ezisetshenziselwa isinyathelo sesine zifakwe kwi-centrifuge centrug

Isinyathelo sesithupha, ukomisa okwenziwe nge-centrifugal: okokugeza okuhlanjiwe kudluliselwa esomisi ngesikulufo esivundlile se-centrifuge, futhi impahla yomiswa ngo-150-170 ° C, futhi impahla eyomile ichobozekile futhi ihlanganiswe.

Uma kuqhathaniswa nobuchwepheshe obukhona be-cellulose ether ether etherger, ukusungulwa kwamanje kusebenzisa i-ethylene oxide njenge-ejenti yokuthezeka ukulungiselela i-hydroxyethyll methyl cellulose, enomqondo omuhle mbamba ngenxa yamaqembu ama-hydroxyethyl. Inokuqina okuhle kokuzikhekisa kanye nokuphikiswa kombumba ngesikhathi sokugcina isikhathi eside. Ingasetshenziswa esikhundleni sezinye izithambiso ze-cellulose.

2. I-Hydroxypropyll methylcellulose

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