Hydroxyethyl cellulose (HEC) isiri-ionic mvura-inonyungudika polymer zvinhu zvinoshandiswa zvakanyanya mukuzora, mishonga yemishonga, pendi, machira, kuvaka nemimwe minda. Iyo ine yakanakisa thickening, kumiswa, kupararira, emulsification, firimu-kugadzira, kuchengetedza mvura uye zvimwe zvivakwa, saka yave yakakosha mubatsiri mumiriri mumaindasitiri mazhinji. Nekudaro, hydroxyethyl cellulose haiwanikwe zvakananga kubva kune zvakasikwa zvinhu, asi inowanikwa nekemikari kushandura yakasikwa cellulose. Kuti tinzwisise kwainobva hydroxyethyl cellulose, isu tinofanirwa kutanga tanzwisisa kwakabva uye chimiro che cellulose.
Natural source ye cellulose
Cellulose ndeimwe yeakawanda organic polymers pasi pano uye inowanikwa zvakanyanya musero madziro emiti, kunyanya mumiti yehuni, donje, flax uye mamwe mafibhi ezvirimwa. Icho chinhu chinokosha mukugadzirwa kwemiti uye inopa simba remagetsi uye kugadzikana. Iyo yakakosha unit ye cellulose ishuga molecule, iyo inobatanidzwa ne β-1,4-glycosidic bonds kuti iite refu cheni chimiro. Sechisikigo chepolymer zvinhu, cellulose ine yakanakisa yemuviri uye makemikari zvimiro, zvichiita kuti ive yakakosha mbishi yezvinhu zvakasiyana-siyana.
Kugadzirira nzira ye hydroxyethyl cellulose
Kunyangwe cellulose pachayo iine akawanda akanakisa zvivakwa, ayo ekushandisa renji anogumira kune imwe nhanho. Chikonzero chikuru ndechekuti cellulose haina kunyungudika kwakashata, kunyanya kushomeka kunyungudika mumvura. Kuti uvandudze ichi chivakwa, masayendisiti anoshandura makemikari cellulose kuti agadzirire akasiyana cellulose zvinobva. Hydroxyethyl cellulose is water-soluble cellulose ether inowanikwa ne ethoxylating natural cellulose kuburikidza nemakemikari anoita.
Mune chaiyo gadziriro yekugadzirira, natural cellulose inotanga kunyungudutswa mualkali solution, uye ipapo ethylene oxide inowedzerwa kune reaction system. Ethoxylation reaction ye ethylene oxide uye hydroxyl mapoka mu cellulose inoitika kugadzira hydroxyethyl cellulose. Iyi shanduko inowedzera hydrophilicity yemaketani e cellulose, nekudaro ichivandudza kunyungudika kwayo uye viscosity zvivakwa mumvura.
Main raw material sources
Iwo musimboti wezvakagadzirwa zvinhu zvekugadzirira hydroxyethyl cellulose i cellulose, uye masosi masosi e cellulose anosanganisira:
Huni: Iyo cellulose yemukati muhuni yakakwira, kunyanya mu coniferous uye yakafara-mashizha huni, uko cellulose inogona kusvika 40% -50%. Wood ndeimwe yeakanyanya kukosha masosi e cellulose muindasitiri, kunyanya mukugadzira mapepa uye kugadzirwa kweselulosi zvinobva.
Cotton: Cotton fiber inenge yakaumbwa ne pure cellulose, uye cellulose yemukati mukotoni yakakwira zvekudarika 90%. Nekuda kwekuchena kwayo kwakanyanya, fiber yekotoni inowanzoshandiswa kugadzirira emhando yepamusoro cellulose derivatives.
Mafayibha ekudyara akadai seflakisi uye hemp: Aya mafibisi ezvirimwa akapfumawo muselulosi, uye nekuti aya mafibisi ezvirimwa anowanzo aine simba remuchina, ane zvimwe zvakanakira mukubvisa cellulose.
Tsvina yekurima: inosanganisira mashanga, mashanga egorosi, mashanga ezviyo, nezvimwewo. Zvinhu izvi zvine huwandu hweselulosi, uye cellulose inogona kutorwa kubva mazviri kuburikidza nemaitiro akakodzera ekurapa, ichipa yakachipa uye inogona kudzokororwa sosi yezvakagadzirwa zvekugadzirwa kweselulosi. .
Nzvimbo dzekushandisa dzehydroxyethyl cellulose
Nekuda kweiyo yakakosha zvivakwa zvehydroxyethyl cellulose, inoshandiswa zvakanyanya muminda yakawanda. Aya anotevera akawanda makuru ekushandisa nzvimbo:
Indasitiri yekuvaka: Hydroxyethyl cellulose inoshandiswa zvakanyanya mukuvaka seyakakora uye inochengetedza mvura mumiriri, kunyanya mune simende dhaka, gypsum, putty poda uye zvimwe zvinhu, izvo zvinogona kunyatso kuvandudza kuvaka uye kuchengetedza mvura zvivakwa.
Indasitiri yemakemikari yemazuva ese: Muzvicherwa, zvigadzirwa zvekuchengetedza ganda, mashamposi uye zvimwe zvigadzirwa zvemazuva ese zvemakemikari, hydroxyethyl cellulose inoshandiswa seyakakora uye inosimbisa kugadzirisa kunzwa uye kugadzikana kwechigadzirwa.
Pendi uye machira: Muindasitiri yekupfekedza, hydroxyethyl cellulose inoshandiswa seyakakora uye rheology control agent kuvandudza kushanda kwejasi uye kudzivirira kudonha.
Pharmaceutical field: Mukugadzirira kwemishonga, hydroxyethyl cellulose inogona kushandiswa sebhainda, thickener uye inomisa mumiririri wemapiritsi kuti ivandudze hunhu hwekuburitsa uye kugadzikana kwemishonga.
Kunyangwe hydroxyethyl cellulose isiri chinhu chinongoitika chega, iyo yekutanga mbishi, cellulose, inowanikwa zvakanyanya muzvirimwa mumasikirwo. Kuburikidza nekuchinja kwekemikari, yakasikwa cellulose inogona kushandurwa kuita hydroxyethyl cellulose nekuita kwakanaka uye kushandiswa mumaindasitiri akasiyana. Zvisikwa zvechisikigo zvakaita sehuni, donje, furakisi, nezvimwewo zvinopa hupfumi hwezvigadzirwa zvekugadzira hydroxyethyl cellulose. Nekufambira mberi kwesainzi uye tekinoroji uye nekuwedzera kwekudiwa kwemaindasitiri, nzira yekugadzira yehydroxyethyl cellulose iri kuramba ichigadziriswa, uye inotarisirwa kuratidza kukosha kwayo kwakasiyana mune mamwe minda mune ramangwana.
Nguva yekutumira: Oct-23-2024