Nhazi kemịkalụ na onye nrụpụta cellulose ethers

Cellulose ethers bụ klaasị nke ogige a na-ejikarị eme ihe na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ na nlekọta onwe onye. A na-enweta ogige ndị a site na cellulose, polymer eke dị na osisi, ma na-emepụta ya site na usoro mgbanwe kemịkalụ. N'isiokwu a, anyị ga-atụle usoro kemịkalụ nke cellulose ethers na ụfọdụ ndị isi na-emepụta ogige ndị a.

Ọdịdị kemịkalụ nke cellulose ethers:

A na-enweta ethers cellulose site na cellulose, polymer linear nke mejupụtara nkeji glucose jikọtara ya na njikọ beta-1,4 glycosidic. A na-egosiputa nkeji cellulose ugboro ugboro n'okpuru:

Mgbanwe kemịkalụ nke cellulose iji mepụta ethers cellulose gụnyere ngbanwe nke otu hydroxyl na agbụ cellulose na otu ndị ọzọ na-arụ ọrụ. Otu ndị na-arụ ọrụ nke a na-ejikarị eme ihe maka nzube a bụ methyl, ethyl, hydroxyethyl, hydroxypropyl, na carboxymethyl.

Methyl cellulose (MC):

Methyl cellulose (MC) bụ cellulose ether nke a na-emepụta site na nnọchi nke otu hydroxyl na agbụ cellulose na otu methyl. Ogo nke nnọchi (DS) nke MC nwere ike ịdị iche site na 0.3 ruo 2.5, dabere na ngwa ahụ. Arọ molikula nke MC na-adịkarị n'ogo nke 10,000 ruo 1,000,000 Da.

MC bụ ọcha na-acha ọcha, enweghị isi, na ntụ ntụ na-enweghị ụtọ nke na-agbaze na mmiri yana ọtụtụ ihe mgbaze organic. A na-ejikarị ya eme ihe dị ka onye na-ebu ibu, ihe nkedo, na emulsifier na ụlọ ọrụ dị iche iche, gụnyere nri, ọgwụ na nlekọta onwe onye. N'ime ụlọ ọrụ ihe owuwu, a na-eji MC mee ihe dị ka ihe mgbakwunye na ngwaahịa ndị sitere na ciment iji meziwanye ọrụ, njide mmiri, na ike nrapado.

Ethyl cellulose (EC):

Ethyl cellulose (EC) bụ cellulose ether nke a na-emepụta site na nnọchi nke otu hydroxyl na agbụ cellulose na otu ethyl. Ogo nke nnọchi (DS) nke EC nwere ike ịdị iche site na 1.5 ruo 3.0, dabere na ngwa ahụ. Arọ molikula nke EC na-adịkarị n'ogo nke 50,000 ruo 1,000,000 Da.

EC bụ ọcha na-acha ọcha, enweghị isi, na ntụ ntụ na-enweghị ụtọ bụ nke a na-esighị ike n'ime mmiri mana sobere ya n'ọtụtụ ihe mgbaze organic. A na-ejikarị ya eme ihe dị ka onye na-ekekọta ihe, onye na-eme ihe nkiri, na onye na-ewepụta oge na ụlọ ọrụ ọgwụ. Ọzọkwa, enwere ike iji EC dị ka ihe mkpuchi maka nri na ngwaahịa ọgwụ iji meziwanye nkwụsi ike na ọdịdị ha.

Hydroxyethyl cellulose (HEC):

Hydroxyethyl cellulose (HEC) bụ cellulose ether nke a na-emepụta site na nnọchi nke hydroxyl dị iche iche na cellulose yinye na hydroxyethyl otu. Ogo nke nnọchi (DS) nke HEC nwere ike ịdị iche site na 1.5 ruo 2.5, dabere na ngwa ahụ. Arọ molekụla nke HEC na-adịkarị n'etiti 50,000 ruo 1,000,000 Da.

HEC bụ ọcha na-acha ọcha, enweghị isi, na ntụ ntụ na-enweghị ụtọ nke na-agbaze na mmiri na ọtụtụ ihe mgbaze organic. A na-ejikarị ya eme ihe dị ka onye na-agba agba, emulsifier, na stabilizer na ụlọ ọrụ dị iche iche, gụnyere nri, ọgwụ na nlekọta onwe onye. N'ime ụlọ ọrụ mmepụta ihe, a na-eji HEC eme ihe dị ka ihe mgbakwunye na ngwaahịa ndị dabeere na ciment iji meziwanye ọrụ, njide mmiri, na ike nrapado.

Hydroxypropyl methyl cellulose (HPMC) bụ cellulose ether nke a na-emepụta site na nnọchi nke hydroxyl otu na cellulose yinye na hydroxypropyl na methyl otu. Ogo nke nnọchi (DS) nke HPMC nwere ike ịdị iche site na 0.1 ruo 0.5 maka nnọchi hydroxypropyl yana 1.2 ruo 2.5 maka nnọchi methyl, dabere na ngwa ahụ. Arọ molikula nke HPMC na-adịkarị n'ogo nke 10,000 ruo 1,000,000 Da.

HPMC bụ ọcha na-acha ọcha, enweghị isi, na ntụ ntụ na-enweghị ụtọ nke na-agbaze na mmiri na ọtụtụ ihe mgbaze organic. A na-ejikarị ya eme ihe dị ka onye na-ebu ibu, ihe nkedo, na emulsifier na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ na nlekọta onwe onye. N'ime ụlọ ọrụ ihe owuwu, a na-eji HPMC eme ihe dị ka ihe mgbakwunye na ngwaahịa ndị sitere na ciment iji kwalite ịrụ ọrụ, njide mmiri, na ike nrapado.

Ndị na-emepụta Cellulose Ethers ná mba ọzọ:

Enwere ọtụtụ ndị na-emepụta cellulose ethers, gụnyere Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, na Daicel Corporation.

Ụlọ ọrụ Dow Chemical bụ otu n'ime ndị na-emepụta cellulose ethers, gụnyere HPMC, MC, na EC. Ụlọ ọrụ ahụ na-enye ọkwa dị iche iche na nkọwa maka ngwaahịa ndị a, dabere na ngwa ahụ. A na-eji ethers cellulose Dow na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ, na nlekọta onwe onye.

Ashland Inc. bụ isi ihe ọzọ na-emepụta cellulose ethers, gụnyere HEC, HPMC, na EC. Ụlọ ọrụ ahụ na-enye ọkwa dị iche iche na nkọwapụta maka ngwaahịa ndị a, dabere na ngwa ahụ. A na-eji ether cellulose nke Ashland na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ, na nlekọta onwe onye.

Shin-Etsu Chemical Co., Ltd bụ ụlọ ọrụ kemịkalụ Japan nke na-emepụta ethers cellulose, gụnyere HEC, HPMC, na EC. Ụlọ ọrụ ahụ na-enye ọkwa dị iche iche na nkọwa maka ngwaahịa ndị a, dabere na ngwa ahụ. A na-eji ethers cellulose nke Shin-Etsu eme ihe n'ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ, na nlekọta onwe onye.

AkzoNobel NV bụ ụlọ ọrụ mba dị iche iche nke Dutch na-emepụta cellulose ethers, gụnyere HEC, HPMC, na MC. Ụlọ ọrụ ahụ na-enye ọkwa dị iche iche na nkọwapụta maka ngwaahịa ndị a, dabere na ngwa ahụ. A na-eji ethers cellulose nke AkzoNobel na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ na nlekọta onwe onye.

Daicel Corporation bụ ụlọ ọrụ kemịkalụ Japan na-emepụta ethers cellulose, gụnyere HPMC na MC. Ụlọ ọrụ ahụ na-enye ọkwa dị iche iche na nkọwa maka ngwaahịa ndị a, dabere na ngwa ahụ. A na-eji ethers cellulose nke Daicel na-arụ ọrụ dị iche iche, gụnyere ihe owuwu, nri, ọgwụ na nlekọta onwe onye.

Mmechi:

Cellulose ethers bụ klas nke ogige sitere na cellulose ma na-ejikarị eme ihe na ụlọ ọrụ dị iche iche. Usoro kemịkalụ nke cellulose ethers gụnyere ngbanwe nke otu hydroxyl na agbụ cellulose na otu ndị ọzọ na-arụ ọrụ, dị ka methyl, ethyl, hydroxyethyl, hydroxypropyl, na carboxymethyl. Enwere ọtụtụ ndị na-emepụta cellulose ethers, gụnyere Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, na Daicel Corporation. Ụlọ ọrụ ndị a na-enye ọkwa dị iche iche na nkọwa maka cellulose ethers, dabere na ngwa ahụ.