HEC muindasitiri yekuputira

Hydroxyethyl cellulose (HEC)ipolymer inokosha isinganyunguduke mumvura, inogadzirwa nekushandisa alkali uye inosanganiswa ne ethylene oxide mu cellulose yechisikigo. Semushonga unoshanda zvakawanda, unosimbisa, unosimbisa uye unogadzira firimu, HEC yave ichishandiswa zvakanyanya muindasitiri yekupenda. Hunhu hwayo hwakanaka hwe rheological, kugona kwayo kutakura zvinhu zvakanaka uye hunhu hwayo hwemakemikari hwakagadzikana zvinoita kuti ive chinhu chakakosha mukugadzira ma coating emazuva ano.

1. Hunhu hwepakutanga hweHEC

HEC ine mvura inonyungudika zvakanaka uye inogona kunyungudika nekukurumidza mumvura inotonhora kana inopisa kuti igadzire colloidal solution yakajeka uye yakagadzikana. Kusviba kwemvura yayo kunokanganiswa zvakanyanya nezvinhu zvakaita sekuwanda kwemvura, tembiricha, uye mwero wekuchekwa kwemvura, uye inoratidza maitiro akajairika ekuyerera kwemvura (kureva, hunhu hwekuchekwa kwemvura). Pamusoro pezvo, HEC ine kugadzikana kwakanaka muhuwandu hwakakura hwepH (2–12), inoshivirira zvakanyanya ma electrolytes, uye haikurumidzi kusvibiswa netupukanana (zvinochengetedza zvinowanzowedzerwa kuti zviwedzere kugadzikana kwenzvimbo yekuchengetera).

Mabhenefiti makuru ekushanda kweHEC anosanganisira:

Kukora kweganda: Wedzera kusimba kwechimiro chekuputira uye kuvandudza mashandiro ekugadzira kwejira rekuputira.

Kudzora tsinga dzeropa: gadzirisa hunhu hwekudonha nekudzikamisa kwejira.

Kuchengeta mvura: kudzivirira mvura kuti isapwanyike nekukurumidza panguva yekuvaka uye kuvandudza kunaka kwefirimu.

Kugadzikana: chengetedza kugadzikana kwefomula mumamiriro akasiyana ezvakatipoteredza.

Kupararira: zvinobatsira kuti pigments ne fillers zvipararire zvakaenzana uye kudzivirira kunaya kwemvura uye kudonha kwemvura.

2. Kushandiswa kwehydroxyethyl cellulose muindasitiri yekuputira

Muindasitiri yekuputira, kunyanya mumunda wezviputiro zvinobva mumvura, HEC inoshandiswa zvakanyanya, kunyanya mune zvinotevera:

(1) Sechinhu chinokodza

HEC inogona kuwedzera kusimba kwese kwemuchina wekudzivirira mvura uye kupa thixotropy yakanaka yekudzivirira. Huwandu hwakakodzera hweHEC hunogona kudzivirira kusimba kwekudzivirira panguva yekukwesha, kukwesha kana kupfapfaidza, uye kubatsira kuvandudza kuzara uye kufanana kwefirimu rekudzivirira. Pamusoro pezvo, hunhu hweHEC hwekuchekerera hunowedzera kusimba kwekudzivirira kana simba rekunze rishandiswa (senge kukwesha, kupfapfaidza), uye kusimba kunodzoserwa kana kwakamira kudzivirira kusimba.

(2) Kugadziriswa kwehunhu hweRheological

Rheology chimwe chezviratidzo zvakakosha zvekushanda kwependi inogadzirwa nemvura. HEC inogadzirisa kushushikana kwegoho uye kutenderera kwependi inogadzirwa kuti iwane kuyerera kwakanakisa uye hunhu hwekupararira pasi penzira dzakasiyana dzekuvaka. Kunyanya mumhando dzakasimba uye dzakasimba, HEC inogona kupa kunzwa kwakanaka kwekuvaka uye kuenzana, kuvandudza kushanda zvakanaka kwekuvaka uye kunaka kwependi inogadzirwa.

(3) Basa rekusimbisa uye rekuparadzira

Mukugadzirwa kwependi, kupararira kwakasimba kwepigments nefillers kwakakosha pakuchengetedza uye kunaka kwependiments. HEC inogona kugadzira layer inodzivirira pamusoro pezvikamu kuti idzivirire kuungana uye kusvibiswa kwezvikamu zvepigments. Panguva imwe chete, nekuwedzera viscosity yesystem, inowedzera kunonoka kwe sedimentation rate yezvikamu, nokudaro ichivandudza kugadzikana kwekuchengetedza uye kufanana kwemavara ependiments.

(4) Kugadzirisa hunhu hwekuchengetedza mvura uye kugadzira firimu

HEC ine kugona kwakanaka kwekuchengetedza mvura. Inogona kudzivirira kupwa kwemvura nekukurumidza panguva yekuvaka, izvo zvinobatsira pakupararira kwemavara, kuramba uchigadzira firimu uye kuvandudza mashandiro ekupedzisira ekuputira. Kunyanya kana ikashandiswa pakupisa kwakanyanya, kwakaoma kana kuti kune maburi, HEC inogona kuvandudza zvakanyanya chitarisiko uye kutsetseka kwepende.

3. Zvinhu zvikuru zvinokanganisa mashandiro eHEC

Mune mamwe mashandisirwo, mashandiro eHEC anokanganiswa nezvinhu zvinotevera:

Dhigirii rekutsiva (DS) uye molar substitution (MS): DS inomiririra huwandu hwema hydroxyl groups anotsiviwa pa glucose unit yega yega, uye MS inomiririra huwandu hweavhareji hwema hydroxyethyl groups anounzwa pa glucose unit yega yega. Kazhinji, kana DS value yakakwira, kunyungudika kweHEC kuri nani; kana MS value yakakwira, kuramba munyu uye kupisa kuri nani.

Kurema kwemamorekuru: Kana huremu hwemamorekuru hwakakwira, kusimba kweHEC kunowedzerawo, asi nguva yekunyungudika inowedzerawo nguva. Mamiriro akasiyana ekushandiswa (akadai sekuputira pamadziro, kuputira kwemaindasitiri) ane zvinodiwa zvakasiyana zvehuremu hwemamorekuru.

Kurapa pamusoro: Kuti HEC ipararire nekukurumidza mumvura inotonhora, zvimwe zvigadzirwa zveHEC zvinogadziriswa pamusoro kuitira kuti zvikwanise kunyungudutswa nekukurumidza mumvura inotonhora uye kuderedza kusangana kwemasero kunovapo panguva yekunyungudutswa.

4. Mienzaniso yekushandisa

Mumachira ekuvaka akadai sependi yelatex yemadziro emukati uye pendi yekunze yekudzivirira madziro, HEC inoshandiswa sechinhu chikuru chekudzora kukora uye rheology, izvo zvisingangogadzirisi chete kutsetseka kwekuvaka, asiwo zvinowedzera kudzivirira kudonha uye mhedzisiro yekushongedza kwejira. Muminda yemachira eindasitiri, machira ehuni, inki dzekudhinda, nezvimwewo, HEC inoshandiswawo zvakanyanya nekuda kwekugadzikana kwayo uye kuenderana kwayo.

Hydroxyethyl cellulose yave chinhu chakakosha uye chakakosha mukugadzira machira emvura nekuda kwehunhu hwayo hwakanaka hwakaita sekukora, kudzora rheology, kuchengetedza mvura uye kugadzikana kwekupararira. Nekuda kwemitemo yezvakatipoteredza iri kuramba ichioma uye kudiwa kuri kuwedzera kwemavara emvura, mikana yekushandisa machira emvura iri kuwedzera.HEC muindasitiri yekuputirazvichave zvakakura. Mune ramangwana, kugadzirwa kwezvigadzirwa zveHEC zvine kunyunguduka kuri nani, kuramba mamiriro ekunze kuri nani uye kushanda kwakasimba kuchava imwe yenzira dzakakosha dzekuvandudza tekinoroji muindasitiri yekupenda.