Mushonga Wemakemikari uye Mugadziri weCellulose Ethers

Cellulose ethers ikirasi yemakomponi ayo anoshandiswa zvakanyanya mumaindasitiri akasiyana, anosanganisira kuvaka, chikafu, mishonga yemishonga, uye kutarisira wega. Aya makomisheni anotorwa kubva ku cellulose, yakasikwa polymer inowanikwa muzvirimwa, uye inogadzirwa kuburikidza nemakemikari ekuchinja maitiro. Muchikamu chino, tichakurukura chimiro chemakemikari e-cellulose ethers uye mamwe evagadziri vakuru vezvisanganiswa izvi.

Kemikari Kuumbwa kweCellulose Ethers:

Cellulose ethers inotorwa kubva ku cellulose, mutsara wepolymer inoumbwa neglucose mayuniti akabatanidzwa ne beta-1,4 glycosidic bond. Iyo inodzokorora unit ye ​​cellulose inoratidzwa pazasi:

Kugadziriswa kwekemikari ye cellulose kugadzira cellulose ethers kunosanganisira kutsiviwa kwemapoka ehydroxyl pacheni ye cellulose nemamwe mapoka anoshanda. Mapoka anonyanya kushandiswa anoshanda echinangwa ichi ndeemethyl, ethyl, hydroxyethyl, hydroxypropyl, uye carboxymethyl.

Methyl Cellulose (MC):

Methyl cellulose (MC) is cellulose ether inogadzirwa nekutsiviwa kwemapoka ehydroxyl pane cellulose cheni nemapoka emethyl. Dhigirii rekutsiva (DS) yeMC inogona kusiyana kubva pa0.3 kusvika 2.5, zvichienderana nekushandiswa. Huremu hwemamorekuru hweMC hunowanzo muhuwandu hwe10,000 kusvika 1,000,000 Da.

MC ihupfu huchena kusvika kuchena, husina hwema, uye husina kunaka hunonyungudika mumvura uye nezvinonyungudutsa zvinonyungudutsa. Inowanzoshandiswa seyakakora, binder, uye emulsifier mumaindasitiri akasiyana siyana, anosanganisira chikafu, mishonga yemishonga, uye kuzvitarisira wega. Muindasitiri yekuvaka, MC inoshandiswa sekuwedzera mune zvigadzirwa-samende kuvandudza kushanda, kuchengetedza mvura, uye kusimba kwekunamatira.

Ethyl Cellulose (EC):

Ethyl cellulose (EC) is a cellulose ether inogadzirwa nekutsiviwa kwemapoka ehydroxyl pane cellulose cheni nemapoka ethyl. Iyo dhigirii yekutsiva (DS) yeEC inogona kusiyana kubva pa1.5 kusvika 3.0, zvichienderana nekushandiswa. Huremu hwemamorekuru hweEC hunowanzo muhuwandu hwe50,000 kusvika 1,000,000 Da.

EC ihupfu huchena kusvika kuchena, husina hwema, uye husina kunaka husinganyungudike mumvura asi hunonyungudika mune zvakawanda zvinonyungudutsa. Inowanzoshandiswa sebhainda, firimu-mugadziri, uye inosimudzira-kuburitswa muindasitiri yemishonga. Pamusoro pezvo, EC inogona kushandiswa sechinhu chekuputira chikafu uye zvigadzirwa zvemishonga kuvandudza kugadzikana kwavo uye kutaridzika.

Hydroxyethyl Cellulose (HEC):

Hydroxyethyl cellulose (HEC) is a cellulose ether inogadzirwa nekutsiviwa kwemapoka ehydroxyl pane cellulose cheni nemapoka ehydroxyethyl. Dhigirii rekutsinhanisa (DS) yeHEC inogona kusiyana kubva ku1.5 kusvika ku2.5, zvichienderana nekushandiswa. Huremu hwemamorekuru hweHEC hunowanzo muhuwandu hwe50,000 kusvika ku1,000,000 Da.

HEC ivhu chena kusvika kuchena, risinganhuhwi, uye risingaravi hupfu hunonyungudika mumvura uye nezvinonyungudutsa zvinonyungudutsa. Inowanzoshandiswa seyakakora, emulsifier, uye stabilizer mumaindasitiri akasiyana siyana, kusanganisira chikafu, mishonga yemishonga, uye kutarisira wega. Muindasitiri yekuvaka, HEC inoshandiswa sekuwedzera mune simende-yakavakirwa zvigadzirwa kuvandudza kushanda, kuchengetwa kwemvura, uye simba rekunamatira.

Hydroxypropyl methyl cellulose (HPMC) is cellulose ether iyo inogadzirwa nekutsiva mapoka ehydroxyl pacheni ye cellulose nehydroxypropyl uye methyl mapoka. Iyo dhigirii yekutsiva (DS) yeHPMC inogona kusiyana kubva pa0.1 kusvika 0.5 yekutsiva hydroxypropyl uye 1.2 kusvika 2.5 yekutsiva methyl, zvichienderana nekushandiswa. Huremu hwemamorekuru hweHPMC hunowanzo muhuwandu hwe10,000 kusvika 1,000,000 Da.

HPMC ivhu chena kusvika kuchena, risinganhuhwi, uye risingaravi hupfu inonyungudika mumvura uye yakawanda organic solvents. Inowanzoshandiswa seyakakora, binder, uye emulsifier mumaindasitiri akasiyana siyana, anosanganisira kuvaka, chikafu, mishonga, uye kutarisira wega. Muindasitiri yekuvaka, HPMC inoshandiswa sekuwedzera mune zvigadzirwa-simende kuvandudza kushanda, kuchengetedza mvura, uye kusimba kwekunamira.

Vagadziri veCellulose Ethers kunze kwenyika:

Kune akati wandei makuru vagadziri ve cellulose ethers, kusanganisira Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, uye Daicel Corporation.

Dow Chemical Company ndeimwe yevanotungamira kugadzira cellulose ethers, kusanganisira HPMC, MC, uye EC. Iyo kambani inopa huwandu hwakasiyana hwemagiredhi uye zvirevo zvezvigadzirwa izvi, zvichienderana nekushandiswa. Dow's cellulose ethers inoshandiswa mumaindasitiri akasiyana siyana, anosanganisira kuvaka, chikafu, mishonga yemishonga, uye kuchengetwa kwemunhu.

Ashland Inc. ndeimwe huru inogadzira cellulose ethers, kusanganisira HEC, HPMC, uye EC. Iyo kambani inopa huwandu hwakawanda hwemagiredhi uye maratidziro ezvigadzirwa izvi, zvichienderana nekushandiswa. Ashland's cellulose ethers inoshandiswa mumaindasitiri akasiyana siyana, anosanganisira kuvaka, chikafu, mishonga yemishonga, nekuchengeta munhu.

Shin-Etsu Chemical Co., Ltd. ikambani yemakemikari yekuJapan inogadzira cellulose ethers, kusanganisira HEC, HPMC, uye EC. Iyo kambani inopa huwandu hwakasiyana hwemagiredhi uye zvirevo zvezvigadzirwa izvi, zvichienderana nekushandiswa. Shin-Etsu's cellulose ethers inoshandiswa mumaindasitiri akasiyana siyana, anosanganisira kuvaka, chikafu, mishonga, uye kutarisira munhu.

AkzoNobel NV ikambani yeDutch yenyika dzakawanda inogadzira cellulose ethers, kusanganisira HEC, HPMC, uye MC. Iyo kambani inopa huwandu hwakawanda hwemagiredhi uye maratidziro ezvigadzirwa izvi, zvichienderana nekushandiswa. AkzoNobel's cellulose ethers inoshandiswa mumaindasitiri akasiyana siyana, anosanganisira kuvaka, chikafu, mishonga yemishonga, uye kutarisira wega.

Daicel Corporation ikambani yemakemikari yekuJapan inogadzira cellulose ethers, kusanganisira HPMC neMC. Iyo kambani inopa huwandu hwakasiyana hwemagiredhi uye zvirevo zvezvigadzirwa izvi, zvichienderana nekushandiswa. Daicel's cellulose ethers inoshandiswa mumaindasitiri akasiyana siyana, anosanganisira ekuvaka, chikafu, mishonga, uye kutarisira wega.

Mhedziso:

Cellulose ethers ikirasi yemakomponi anobva ku cellulose uye anoshandiswa zvakanyanya mumaindasitiri akasiyana. Chimiro chemakemikari ye cellulose ethers chinosanganisira kutsiviwa kwemapoka ehydroxyl pacheni ye cellulose nemamwe mapoka anoshanda, akadai semethyl, ethyl, hydroxyethyl, hydroxypropyl, uye carboxymethyl. Kune akati wandei makuru vagadziri ve cellulose ethers, kusanganisira Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, uye Daicel Corporation. Aya makambani anopa huwandu hwakawanda hwemagiredhi uye zvakatemwa zve cellulose ethers, zvichienderana nekushandiswa.