Methylhydroxyethylcellulose (MHEC) bụ akụkụ dị mkpa na ụlọ ọrụ dị iche iche, ọkachasị n'ihe owuwu, ọgwụ na ngwaahịa nlekọta onwe onye. Ọrụ ya bụ isi dị ka onye na-ejigide mmiri na-eme ka ọ dị mkpa na ngwa ndị dị ka ihe cimenti, usoro ọgwụ na ihe ịchọ mma.
1. Ọdịdị Molecular nke MHEC:
MHEC bụ nke cellulose ethers ezinụlọ, nke bụ ihe ndị sitere na cellulose-polima na-emekarị nke a na-achọta na mgbidi cell nke osisi. A na-emepụta MHEC site na etherification nke cellulose, ebe a na-ewebata ma methyl na hydroxyethyl otu n'ime ọkpụkpụ cellulose. Ogo nke nnọchi (DS) nke otu ndị a dịgasị iche iche, na-emetụta njirimara nke MHEC dị ka ihe nhụsianya, viscosity, na ike njide mmiri.
2. Solubility na mgbasa:
MHEC na-egosipụta ezigbo solubility na mmiri n'ihi ọnụnọ nke hydrophilic hydroxyethyl otu. Mgbe a gbasasịrị n'ime mmiri, ụmụ irighiri ihe MHEC na-enweta hydration, na ụmụ irighiri mmiri na-eme njikọ hydrogen na otu hydroxyl dị n'akụkụ ọkpụkpụ azụ cellulose. Usoro hydration a na-ebute ọzịza nke ụmụ irighiri ihe MHEC na nhazi nke ngwọta viscous ma ọ bụ mgbasa.
3. Usoro eji ejide mmiri:
Usoro njide mmiri nke MHEC nwere ọtụtụ ihe ma tinye ọtụtụ ihe:
a. Njikọta hydrogen: MHEC molecules nwere ọtụtụ hydroxyl dị iche iche nwere ike ịmepụta njikọ hydrogen na ụmụ irighiri mmiri. Mkpakọrịta a na-eme ka njide mmiri dịkwuo mma site na ọnyà mmiri n'ime matrix polymer site na njikọ hydrogen.
b. Ikike Ọzịza: Ọnụnọ nke ma hydrophilic na hydrophobic dị na MHEC na-enye ohere ka ọ zaa nke ukwuu mgbe ekpughere ya na mmiri. Ka ụmụ irighiri mmiri na-abanye na netwọk polymer, ụdọ MHEC na-aza, na-emepụta ihe dị ka gel nke na-ejigide mmiri n'ime matriks ya.
c. Capillary Action: N'ime ngwa ihe owuwu, a na-agbakwunye MHEC na ihe cimenti dị ka ngwa agha ma ọ bụ kọmpat iji meziwanye arụmọrụ ma belata mmiri na-efu. MHEC na-arụ ọrụ n'ime oghere capillary nke ihe ndị a, na-egbochi ikpochapụ mmiri ngwa ngwa na ịnọgide na-enwe otu mmiri mmiri. Omume capillary a na-eme ka hydration na usoro ọgwụgwọ dị mma, na-eduga n'ịkwalite ike na ịdịte aka nke ngwaahịa ikpeazụ.
d. Ngwongwo Ihe Nkiri: Na mgbakwunye na ikike idobe mmiri ya na ngwọta dị ukwuu, MHEC nwekwara ike ịmepụta ihe nkiri dị mkpa mgbe etinyere ya n'elu. Ihe nkiri ndị a na-eme dị ka ihe mgbochi, na-ebelata mmiri na-efu site na evaporation na inye nchebe megide mgbanwe mmiri.
4. Mmetụta nke ogo nnọchi anya (DS):
Ogo nke nnọchi nke methyl na hydroxyethyl dị n'ọkpụkpụ azụ cellulose na-emetụta ihe njide mmiri nke MHEC. Ụkpụrụ DS dị elu na-ebutekarị ikike njigide mmiri n'ihi ụbara hydrophilicity na mgbanwe yinye. Agbanyeghị, ụkpụrụ DS dị oke elu nwere ike iduga viscosity ma ọ bụ gelation gabigara ókè, na-emetụta nhazi na arụmọrụ nke MHEC na ngwa dị iche iche.
5. Mmekọrịta ya na akụrụngwa ndị ọzọ:
Na usoro mgbagwoju anya dị ka ọgwụ ọgwụ ma ọ bụ ngwaahịa nlekọta onwe onye, MHEC na-emekọrịta ihe na ihe ndị ọzọ, gụnyere ogige na-arụ ọrụ, surfactants, na thickeners. Mmekọrịta ndị a nwere ike imetụta nkwụsi ike zuru oke, viscosity, na ịdị irè nke nhazi ahụ. Dịka ọmụmaatụ, na nkwusioru ọgwụ, MHEC nwere ike inye aka kwụsịtụ ihe ndị na-arụ ọrụ nke ọma n'oge oge mmiri mmiri, na-egbochi sedimentation ma ọ bụ nchịkọta.
6. Ihe gbasara gburugburu ebe obibi:
Ọ bụ ezie na MHEC bụ ihe na-emebi emebi ma na-ewerekarị ya dị ka enyi na enyi gburugburu ebe obibi, mmepụta ya nwere ike ịgụnye usoro kemịkalụ na-emepụta ihe mkpofu ma ọ bụ site na ngwaahịa. Ndị na-emepụta ihe na-enyochawanye usoro mmepụta ihe na-adigide yana na-enweta cellulose site na isi mmalite biomass ọhụrụ iji belata mmetụta gburugburu ebe obibi.
7. Nkwubi okwu:
Methylhydroxyethylcellulose (MHEC) bụ onye na-ejigide mmiri dị iche iche nwere ngwa dị iche iche n'ofe ụlọ ọrụ dị iche iche. Ọdịdị molekụla ya, solubility, na mmekọrịta ya na mmiri na-enyere ya aka ijigide mmiri nke ọma, melite ọrụ ọrụ, na ịkwalite arụmọrụ nke nhazi. Ịghọta usoro ọrụ nke MHEC dị mkpa maka ịkwalite ojiji ya na ngwa dị iche iche mgbe ị na-atụle ihe ndị dị ka ogo nke nnọchi, ndakọrịta na ihe ndị ọzọ, na ihe gbasara gburugburu ebe obibi.
Oge nzipu: Mar-19-2024