Hydroxyethyl Cellulose Yemuviri uye Chemical Properties
Chimiro chechimiro Ichi chigadzirwa chichena kusvika kuchiedza chero fibrous kana powdery yakasimba, isiri-chepfu uye isina kunaka
Kunyungudika 288-290 °C (Zvita.)
Density 0.75 g/mL pa25 °C(lit.)
Solubility Solubility mumvura. Insoluble mune zvakajairika organic solvents. Inonyungudika mumvura inotonhora uye mumvura inopisa, uye kazhinji isinganyunguriki mune yakawanda organic solvents. Iyo viscosity inoshanduka zvishoma muhuwandu hwePH kukosha 2-12, asi viscosity inoderera kupfuura iyi chiyero. Iine mabasa ekukora, kumisa, kusunga, emulsifying, kuparadzira, uye kuchengetedza mwando. Mhinduro mumhando dzakasiyana dze viscosity dzinogona kugadzirirwa. Iine yakasarudzika yakanaka munyu solubility kune electrolytes.
Senge isiri-ionic surfactant, hydroxyethyl cellulose ine zvinotevera zvimiro mukuwedzera mukukora, kumisa, kusunga, kuyangarara, kuumba firimu, kuparadzira, kuchengetedza mvura nekupa inodzivirira colloids:
1. HEC inonyungudika mumvura inopisa kana mvura inotonhora, kupisa kwepamusoro kana kubikira pasina kunaya, kuitira kuti ive nemhando dzakasiyana-siyana dzekunyungudika uye viscosity maitiro, uye kwete-thermal gelation;
2. Haisi-ionic uye inogona kugarisana nemamwe akawanda-anonyungudika emvura mapolymers, surfactants, uye munyu. Iyo yakanakisa colloidal thickener ye-high-concentration electrolyte mhinduro;
3. Kukwanisa kwekuchengetedza mvura kwakapetwa kaviri kune iyo yemethyl cellulose, uye ine zviri nani kuyerera kwemutemo.
4. Kuenzaniswa neyakazivikanwa methyl cellulose uye hydroxypropyl methyl cellulose, kukwanisa kuparadzira kweHEC ndiyo yakaipisisa, asi kukwanisa kwekudzivirira kwecolloid ndiyo yakasimba.
Zvido zvehunyanzvi uye zviyero zvemhando yehydroxyethyl cellulose
Zvinhu: Index molar substitution (MS) 2.0-2.5 Unyoro (%) ≤5 Mvura isingagadziriswi (%) ≤0.5 PH inokosha 6.0-8.5 Heavy metal (ug / g) ≤20 Ash (%) ≤5 Viscosity (mpa. s) 2% 20 ℃ mhinduro ine mvura 5-60000 lead (%) ≤0.001
Kushandiswa kwehydroxyethyl cellulose
【Shandisa 1】 Inoshandiswa se surfactant, latex thickener, colloidal inodzivirira, mafuta ekuongorora fracturing fluid, polystyrene uye polyvinyl chloride dispersant, nezvimwe.
[Shandisa 2] Inoshandiswa sechinhu chakakora uye chinodzikisira kurasikirwa kwemvura kune mvura-yakavakirwa mvura yekuchera uye inopedza zvinwiwa, uye ine inooneka kukora mhedzisiro mune brine yekuchera zvinwiwa. Inogona zvakare kushandiswa semvura kurasikirwa inoderedza yemafuta tsime simende. Inogona kuchinjika-yakabatana ne polyvalent simbi ions kugadzira gel.
[Shandisa 3] Ichi chigadzirwa chinoshandiswa sepolymeric dispersant yemvura-based gel fracturing fluid, polystyrene uye polyvinyl chloride mukuchera migodhi. Inogona zvakare kushandiswa semulsion thickener muindasitiri yependi, hygrostat muindasitiri yemagetsi, simende anticoagulant uye mumiriri wekuchengetedza mwando muindasitiri yekuvaka. Ceramic industry glazing uye mazino binder. Inoshandiswawo zvakanyanya mukudhinda nekudhaya, machira, kugadzira mapepa, mushonga, hutsanana, chikafu, fodya, mishonga yezvipembenene uye zvinodzima moto.
[Shandisa 4] Inoshandiswa se surfactant, colloidal protective agent, emulsification stabilizer yevinyl chloride, vinyl acetate uye mamwe emulsions, pamwe chete ne viscosifier, dispersant, uye dispersion stabilizer ye latex. Inoshandiswa zvakanyanya mukunamira, mafiibhi, kudhaya, kugadzira mapepa, zvizorwa, mishonga, mishonga yezvipembenene, nezvimwewo. Inoshandisawo zvakawanda mukuongorora oiri neindasitiri yemichina.
【Shandisa 5】 Hydroxyethyl cellulose ine mabasa epamusoro pekuita, kukora, kumisa, kusunga, emulsifying, kugadzira firimu, kuparadzira, kuchengetedza mvura uye kupa dziviriro mumishonga yakasimba uye gadziriro yemvura.
Kushandiswa kwehydroxyethyl cellulose
Inoshandiswa mukugadzira machira, zvizorwa, mushonga wemazino, surfactants, latex thickeners, colloidal protective agents, mafuta fracturing fluid, polystyrene uye polyvinyl chloride dispersants, nezvimwe.
Hydroxyethyl Cellulose Material Safety Data Sheet (MSDS)
1. Chigadzirwa chacho chine njodzi yekuputika kweguruva. Paunenge uchibata huwandu hukuru kana huwandu, chenjerera kudzivirira kuisa huruva uye kuturika mumhepo, uye chengetedza kure nekupisa, sparks, marimi uye static magetsi. 2. Dzivisa methylcellulose poda kubva pakupinda uye kubata maziso, uye pfeka masiki yemasefa uye magirazi ekuchengetedza panguva yekushanda. 3. Chigadzirwa chacho chinotsvedza zvikuru kana chakanyorova, uye yakadururwa methylcellulose powder inofanira kucheneswa munguva uye anti-slip treatment inofanira kuitwa.
Kuchengetedza uye maitiro ekufambisa ehydroxyethyl cellulose
Kurongedza: mabhegi maviri-layer, bhegi rekunze rinoumbwa pepa, yemukati polyethylene firimu bhegi, net uremu 20kg kana 25kg pabhegi.
Kuchengeta uye zvekufambisa: Chengeta munzvimbo ine mhepo uye yakaoma mumba, uye teerera kune mwando. Mvura uye kudzivirira kwezuva panguva yekufambisa.
Kugadzirira nzira ye hydroxyethyl cellulose
Method 1: Nyura mapeji edonje mbishi kana pulp yakanatswa mu30% lye, ibudise mushure mehafu yeawa, wodzvanya. Dzvanya kusvika chiyero che alkali-mvura yemukati yasvika 1: 2.8, uye enda kune inopwanya mudziyo wekupwanya. Isa yakapwanyika alkali fiber mu kettle yekuita. Yakavharwa uye yakabviswa, yakazadzwa nenitrogen. Mushure mekutsiva mhepo muketero nenitrogen, dzvanya mune precooled ethylene oxide liquid. React pasi pekutonhodzwa pa25°C kwemaawa maviri kuti uwane crude hydroxyethyl cellulose. Geza chigadzirwa chisina kuchena nedoro uye gadzirisa pH kukosha kusvika 4-6 nekuwedzera acetic acid. Wedzera glyoxal yekubatanidza uye kuchembera, geza nekukurumidza nemvura, uye pakupedzisira centrifuge, yakaoma, uye kugaya kuti uwane yakaderera-munyu hydroxyethyl cellulose.
Method 2: Alkali cellulose ipolymer yakasikwa, imwe neimwe fiber base ring ine mapoka matatu ehydroxyl, boka rinonyanya kushanda rehydroxyl rinoita kuti rigadzire hydroxyethyl cellulose. Soak mapeji edonje mbishi kana yakacheneswa pulp mu30% fluid caustic soda, ibudise uye wodzvanya mushure mehafu yeawa. Svina kusvikira chiyero chemvura yealkali inosvika 1: 2.8, wobva wapwanya. Isa iyo pulverized alkali cellulose mu kettle yekuita, kuisunga, kupukuta, kuizadza nenitrogen, uye dzokorora vacuumization uye nitrogen kuzadza kutsiva zvachose mweya muketero. Dzvanya mu pre-cooled ethylene oxide liquid, isa mvura inotonhorera mubhachi re reaction kettle, uye dzora maitikiro angaita 25°C kwemaawa maviri kuti uwane crude hydroxyethyl cellulose. Chigadzirwa chisina kuchena chinoshambidzwa nedoro, chakanyungudika kusvika pH 4-6 nekuwedzera acetic acid, uye muchinjiko-yakabatana ne glyoxal yekuchembera. Zvadaro inoshambidzwa nemvura, yakasvibiswa ne centrifugation, yakaomeswa uye yakapwanyika kuti iwane hydroxyethyl cellulose. Raw material kushandiswa (kg/t) donje linters kana yakaderera pulp 730-780 liquid caustic soda (30%) 2400 ethylene oxide 900 doro (95%) 4500 acetic acid 240 glyoxal (40%) 100-300
Hydroxyethyl cellulose ichena kana yero isinganhuhwi, isinganakidze uye iri nyore kuyerera, inonyungudika mumvura inotonhora nemvura inopisa, kazhinji isinganyungudike mumazhinji organic solvents.
Hydroxyethyl cellulose (HEC) ichena kana yakareruka yero, isina kunhuhwirira, isina-chepfu fibrous kana powdery solid, iyo inogadzirwa ne etherification reaction yealkaline cellulose uye ethylene oxide (kana chlorohydrin). Nonionic soluble cellulose ethers. Nekuti HEC ine zvinhu zvakanaka zvekukora, kumisa, kuparadzira, emulsifying, kubatana, kugadzira firimu, kuchengetedza unyoro nekupa inodzivirira colloid, yakashandiswa zvakanyanya mukuongorora kwemafuta, machira, kuvaka, mishonga, chikafu, machira, mapepa uye polymerization. nemimwe minda. 40 mesh sieving rate ≥ 99%; kunyorovesa tembiricha: 135-140 ° C; kujeka kwehuwandu: 0.35-0.61g / ml; kuora kwekushisa: 205-210 ° C; kunonoka kupisa kukurumidza; kuenzana tembiricha: 23°C; 50% 6% paRh, 29% pa84% rh.
Maitiro ekushandisa hydroxyethyl cellulose
yakawedzerwa zvakananga panguva yekugadzira
1. Wedzera mvura yakachena kubhaketi guru rine musanganiswa weshear wakakwirira. the
Hydroxyethyl cellulose
2. Tanga kubvongodza uchienderera mberi nekumhanya kwakaderera uye zvishoma nezvishoma sieve hydroxyethyl cellulose mumushonga wakaenzana. the
3. Ramba uchikurudzira kusvikira zvikamu zvose zvanyorova. the
4. Wobva wawedzera mheni kudzivirira mumiririri, zvakakosha additives senge pigments, dispersion aids, ammonia water. the
5. Shingairira kusvikira yose hydroxyethyl cellulose yakanyungudutswa zvachose (viscosity yemhinduro inowedzera zvakanyanya) isati yawedzera zvimwe zvikamu muhutano, uye kugaya kusvikira chigadzirwa chapera.
Akashongedzerwa nedoro ramai
Iyi nzira ndeyekugadzira doro raamai nepamusoro pekutanga, uyezve kuwedzera kune latex pendi. Kubatsira kweiyi nzira ndeyokuti ine hukuru hunochinja uye inogona kuwedzerwa zvakananga kupende yakapedzwa, asi inofanira kuchengetwa zvakanaka. Matanho acho akafanana neMatanho 1-4 muMethod 1, mutsauko ndewekuti hapana chikonzero chekubvongodza kusvika yanyungudika zvachose kuita viscous solution.
Porridge ye phenology
Sezvo organic zvinonyungudutsa zvisingaite zvinonyungudutsa zvehydroxyethyl cellulose, izvi organic solvents zvinogona kushandiswa kugadzira porridge. Iyo inonyanya kushandiswa organic solvents ndeye organic liquids yakadai se ethylene glycol, propylene glycol uye mafirimu ekare (akadai se ethylene glycol kana diethylene glycol butyl acetate) mukugadzirwa kwependi. Mvura yeaizi zvakare inonyungudutsa isina kunaka, saka mvura yechando inowanzoshandiswa pamwe chete nezvinonwiwa kugadzirwa porridge. Iyo hydroxyethyl cellulose yeporridge inogona kuwedzerwa zvakananga kupende, uye hydroxyethyl cellulose yakakamurwa uye yakaputika muporridge. Kana yawedzerwa pendi, inonyungudika pakarepo uye inoita seyakakora. Mushure mekuwedzera, ramba uchikurudzira kusvikira hydroxyethyl cellulose yanyungudutswa zvachose uye yakafanana. Kazhinji, porridge inogadzirwa nekusanganisa zvikamu zvitanhatu zveorganic solvent kana ice water nechikamu chimwe chehydroxyethyl cellulose. Mushure memaminitsi matanhatu kusvika makumi matatu, iyo hydroxyethyl cellulose ichave ine hydrolyzed uye kuzvimba zviri pachena. Muzhizha, tembiricha yemvura inowanzokwira zvakanyanya, saka haina kukodzera kushandisa porridge.
Chengetedzo yehydroxyethyl cellulose
Sezvo iyo yepamusoro-yakagadziriswa hydroxyethyl cellulose ipfu kana selulosi yakasimba, zviri nyore kubata nekuinyungudutsa mumvura chero bedzi zvinhu zvinotevera zvichiteererwa. the
1. Pamberi uye mushure mekuwedzera hydroxyethyl cellulose, inofanira kukurudzirwa nguva dzose kusvikira mhinduro yacho yakanyatsojeka uye yakajeka. the
2. Inofanira kuiswa zvishoma nezvishoma mumusanganiswa wetangi, usawedzera zvakananga huwandu hwakawanda hwehydroxyethyl cellulose kana hydroxyethyl cellulose iyo yakagadzira mapundu nemabhora musanganisi tangi. 3. Tembiricha yemvura uye kukosha kwePH mumvura zvine hukama huri pachena nekuparara kwehydroxyethyl cellulose, saka kutarisisa kunofanirwa kubhadharwa. the
4. Usawedzera mamwe alkaline musanganiswa musati hydroxyethyl cellulose poda ichidziya kuburikidza nemvura. Kusimudza iyo pH kukosha mushure mekudziya kunobatsira kunyungudika. the
5. Sezvinobvira, wedzera anti-fungal agent nekukurumidza sezvinobvira. the
6. Paunenge uchishandisa high-viscosity hydroxyethyl cellulose, kusanganiswa kwedoro raamai hakufaniri kunge kwakakwirira kudarika 2.5-3%, kana zvisina kudaro doro raamai richava rakaoma kubata. Iyo post-yakarapwa hydroxyethyl cellulose kazhinji haisi nyore kugadzira mapundu kana mativi, uye haizogadziri insoluble spherical colloids mushure mekuwedzera mvura.
Iyo inowanzoshandiswa seyakakura, inodzivirira, inonamira, inosimbisa uye inowedzera yekugadzirira emulsion, jelly, mafuta, lotion, kuchenesa maziso, suppository uye piritsi, uye inoshandiswawo se hydrophilic gel uye skeleton zvinhu 1. Kugadzirira kweskeleton- mhando inoenderera-kusunungurwa gadziriro. Inogonawo kushandiswa seyakagadzikana mukudya.
Nguva yekutumira: Feb-02-2023