Kugadzirira kwehydroxytHyl cellulose

HydroxytHyl Cellulose (HEC) is is is is is-ionic, yakadzika-mvura polymer yakatorwa kubva kuCellulose, polymer yakasikwa inowanikwa mumasero emaruva ezvirimwa. Inoshandiswa zvakanyanya mumaindasitiri akasiyana, kusanganisira mishonga, cosmetics, pendi, uye zvinonamatira, nekuda kwekunakirwa kwayo kwakanaka, firimu-fomu, uye zvimiro zvetsiva. Kugadzirira kwehydroxytHyl cellulose kunosanganisira eriraifitizenti yemheremalose ine ethylyone oxide pasi pealkaline mamiriro. Kuita uku kunogona kuputswa mumatanho akati wandei ekuverenga: kucheneswa cellulose, kushomeka, kutsvaga, kusarerekera, kushambidza, uye kugeza, uye kugeza.

1. Cellulose kucheneswa
Nhanho yekutanga mukugadzirira kwehydroxytHyl cellulose ndeye kucheneswa kwemheremello Raw Cellulose ine zvisikwa zvakadai sekuruva, hemicellulose, uye mamwe anodzingwa anofanirwa kubviswa kuti awane kukwira-kwakadzika mheremalose akakodzera kugadzirisa kwemakemikari.

Nhanho DZINOGONESWA:

Maitiro ekugadzirisa: Iyo Raw Cellulose inogadziriswa kuderedza kuderedza saizi yayo uye kuwedzera nzvimbo yayo yemukati, inofambisa inotevera makemikari kurapwa.
Kurapa kwemakemikari: Iyo cellulose inobatwa nemakemikari akadai seSodium Hydroxide (Naoh) uye Sodiic Sulfite (Na2So3) Kushambidza uye Kujekesa Kusvibiswa Kwese uye kuwana chena, fibul cellow cellow.

2. Alkalization
Iyo Cellified Cellulose inobva yasarudzika kuti iite kuti ive iyo yekutsvaira maitiro. Izvi zvinosanganisira kurapa cellulose nemhedzisiro mhinduro ye sodium hydroxide.

Reaction:
Cellulose + nao → Alkali cellulose

Maitiro:

Iyo cellulose yakamiswa mumvura, uye sodium hydroxide mhinduro inowedzerwa. Iko kusungwa kweNaoh kazhinji kunobva ku10-30%, uye maitiro anoitwa pakupisa pakati pe20-40 ° c.
Musanganiswa wacho unomutswa kuti uve nechokwadi chekunyora kwunifomu yeAlkali, zvichitungamira kune kuumbwa kweAlkali cellulose. Iyi yepakati inonyanya kuitisa yakananga kuEndlyne oxide, inofambisa maitiro ekutsva.

3. Kuwedzera
Nhanho yakakosha mukugadzirira kwehydroxytHyl cellulose ndeye kuwedzerwa kweAlkali cellulose neEtralene oxide. Kuita uku kunounza hydroxythyl mapoka (-ch2ch2oh) mu cellulose backbone, ichiita kuti ive mhou dzemvura.

Reaction:
Alkali cellulose + ethylene oxide → HydroxytHyl Cellulose + naoh

Maitiro:

Etleyle oxide inowedzerwa kune alkali cellalose, ingave iri batch kana kuenderera mberi maitiro. Maitiro anoitwa anoitwa mune autoclave kana yekumanikidza.
Mamiriro ezvinhu ekuita, kusanganisira tembiricha (50-100 ° C) uye kumanikidzwa (1-5 denm), anodzorwa nekuchenjera kuti ave nechokwadi chekutsiva kwehydroxyl. Dhigirii rekutsiva

4. Kusarerekera
Mushure mekuita kwekuchinja, musanganiswa une hydroxylyl cellulose uye yakasara sodium hydroxide. Nhanho inotevera inosemesa, uko iyo yakawandisa Alkali isingarereke uchishandisa acid, kazhinji acetic acid (ch3cooh) kana hydrochlor acid (HCL).

Reaction: Naoh + HCL → Nacl + H2O

Maitiro:

Iyo acid inowedzerwa zvishoma nezvishoma kumusanganiswa wekushanda pasi pekudzorwa kuti udzivise kupisa zvakanyanya uye kudzivirira kusvibiswa kwehydroxythl cellulose.
Musanganiswa wezvevakarerekera zvinobva zvaiswa pasi peP hwokugadzirisa kuti zviite kuti zvive mukati meiyo yaunoda huwandu, kazhinji dzakatenderedza PH (6-8).
5. Kugeza
Kutevera kusarerekera, chigadzirwa chinofanira kusukwa kuti ubvise munyu uye zvimwe zvigadzirwa. Iyi nhanho yakakosha yekuwana yakachena hydroxytl cellulose.

Maitiro:

Musanganiswa wacho unonyimwa nemvura, uye hydroxytl cellulose inoparadzaniswa neyekupedzisira kana centrifugation.
Iyo yakaparadzaniswa hydroxytl cellulose inodzokororwa yakadzokororwa nemvura inodhonzwa kuti ibvise munyu wakasara uye kusachena. Maitiro ekushambidza anoenderera mberi kusvikira mvura yekushambidza inosvika padanho rakatsanangurwa, zvichiratidza kubviswa kwekusvibiswa kwakasimba.
6. Kuomesa
Nhanho yekupedzisira mukugadzirira kwehydroxytHyl cellulose iri kuoma. Iyi nhanho inobvisa mvura yakawandisa, ichipa chigadzirwa chakaoma, chakasununguka chakakodzera kushandiswa kwakasiyana siyana.

Maitiro:

Iyo yakashambwa hydroxyll cellulose inopararira pane yakaoma trays kana kuburitswa kuburikidza neyekuomesa tunaki. Iko kupisa kupisa kwakanyatso kudzorwa kuti udzivise kupisa kusvibiswa, kazhinji kubva ku50-80 ° c.
Nenzira imwe, spray kuoma inogona kushandiswa kukurumidza uye kushanda zvakanaka. Mukupedza kuomesa, iyo yemukati hydroxytHlosel Celloxal solution yakagadzirirwa madonhwe akanaka uye akaomeswa mune inopisa mhepo rwizi, zvichikonzera hupfu hwakatsetseka.
Chigadzirwa chakaomeswa chinobva chakanyonganiswa kune chinodiwa chidimbu chemukuru uye chakarongedzwa kuti chengetedzo uye kugovera.
Hunhu hwekudzora uye zvikumbiro
Mugadziriro yegadziriro yegadziriro, yakaoma yemhando yekudzora inoitwa kuti ive nechokwadi chekuenderana uye mhando yeiyo hydroxyetlyl cellulose. Key paramita senge viscosity, degree rekutsiva, zvinyoro-zvemukati, uye size saizi inogara ichitariswa.

Zvishandiso:

Mishonga: Inoshandiswa seMumiriri Akakora, Binder, uye Stabilizer mune mafomu kunge mahwendefa, kumiswa, uye mafuta.
Cosmetics: Inopa viscosity uye kuumbwa kune zvigadzirwa semakirimu, lotions, uye shampoos.
Pendi uye Mabhonzo: zviito seanoti uye rheology modifier, kuvandudza zvigadzirwa zvekushandisa uye kugadzikana kwemapendi.
Indasitiri yeChikafu: Mabasa senge akakomberedza, stabilizer, uye emulsifier mune akasiyana zvigadzirwa zvekudya.

Kugadziriswa kwehydroxytHyl cellulose kunosanganisira nhevedzano yenhare dzinotsanangurwa nemakemikari akanyatsotaurwa uye maitiro akaomeswa pakugadzirisa mapoka ekuisa mapoka ehydroxethyl. Nhanho yega yega, kubva kuchinetso cellulose yekuomesa, inokosha pakufunga kunaka uye kushanda kwechigadzirwa chekupedzisira. Hydroxethyl midziyo yemasekisiyi inoita kuti ive chinhu chakakosha muindasitiri akawanda, zvichiratidza kukosha kwehunyanzvi hwekugadzira zviito zvekuita zvakananga zvinodiwa zvekushandisa zvakasiyana siyana.