Ka hoʻohana ʻana a me ka hoʻomākaukau ʻana o ka hydroxyethyl methyl cellulose HEMC

ʻO ka Hydroxyethyl methyl cellulose HEMChiki ke hoʻohana ʻia ma ke ʻano he mea pale colloid, emulsifier a me ka dispersant ma muli o kāna hana hana ma luna o ka ʻili i loko o ka hopena wai. ʻO kahi laʻana o kāna noi penei: ʻO ka hopena o ka hydroxyethyl methyl cellulose ma nā waiwai o ka sima. ʻO ka Hydroxyethyl methylcellulose kahi pauka keʻokeʻo ʻala ʻole, ʻono ʻole, ʻaʻohe mea ʻawahia e hoʻoheheʻe ʻia i ka wai anuanu e hana i kahi hopena maopopo a viscous. Loaʻa iā ia nā waiwai o ka hoʻomānoanoa, ka nakinaki ʻana, ka hoʻopuehu ʻana, ka emulsifying, ka hana ʻana i nā kiʻiʻoniʻoni, ka hoʻokuʻu ʻana, ka adsorbing, ka gelling, ka hana ma luna, ka mālama ʻana i ka makū a me ka pale ʻana i nā colloids. Ma muli o ka hana hana ma luna o ka hopena wai, hiki ke hoʻohana ʻia ma ke ʻano he mea pale colloid, he emulsifier a me kahi dispersant. Loaʻa i ka hopena wai Hydroxyethyl methyl cellulose ka hydrophilicity maikaʻi a he mea mālama wai kiʻekiʻe.
hoʻomākaukau
ʻO ke ʻano hana no ka hoʻomākaukau ʻana i ka hydroxyethyl methyl cellulose, ʻo ke ʻano hana e hoʻohana ana i ka pulupulu i hoʻomaʻemaʻe ʻia ma ke ʻano he mea maka a me ka ethylene oxide ma ke ʻano he etherifying agent e hoʻomākaukau ai.hydroxyethyl methyl cellulose. Hoʻomākaukau ʻia nā mea maka no ka hoʻomākaukau ʻana i ka hydroxyethyl methyl cellulose ma nā ʻāpana ma ke kaupaona: 700-800 mau ʻāpana o ka hui ʻana o toluene a me isopropanol ma ke ʻano he mea hoʻoheheʻe, 30-40 mau ʻāpana o ka wai, 70-80 mau ʻāpana o ka sodium hydroxide, 80-85 mau ʻāpana o ka pulupulu i hoʻomaʻemaʻe ʻia, 20-28 mau ʻāpana o ka oxyethane, 80-90 mau ʻāpana o ka methyl chloride, a me 16-19 mau ʻāpana o ka waikawa acetic glacial; ʻo nā ʻanuʻu kikoʻī:

ʻO ka hana mua, i loko o ka reactor, e hoʻohui i ka toluene a me ka hui isopropanol, ka wai, a me ka sodium hydroxide, e hoʻomehana a hiki i 60 ~ 80 ℃, e hoʻomoʻa ʻia no 20 ~ 40 mau minuke;

ʻO ka lua o ka hana, ka alkaliization: e hoʻomaʻalili i nā mea i luna a hiki i 30 ~ 50 ℃, e hoʻohui i ka pulupulu i hoʻomaʻemaʻe ʻia, e pīpī i ka hui ʻana o toluene a me isopropanol me ka solvent, e hoʻoneʻe i 0.006Mpa, e hoʻopiha me ka nitrogen no 3 mau pani, a hoʻokō i ka alkali ma hope o ke pani ʻana. ʻO nā kūlana alkalization penei: ʻo ka manawa alkalization he 2 mau hola, a ʻo ka mahana alkalization he 30°C a 50°C;

ʻO ke kolu o ka hana, etherification: ua pau ka alkaliization, ua hoʻoneʻe ʻia ka reactor i 0.05 ~ 0.07MPa, ua hoʻohui ʻia ka ethylene oxide a me ka methyl chloride, a mālama ʻia no 30 ~ 50 mau minuke; ke kahua mua o ka etherification: 40 ~ 60 ℃, 1.0 ~ 2.0 hola, ua kāohi ʻia ke kaomi ma waena o 0.150.3Mpa; ke kahua ʻelua o ka etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 hola, ua kāohi ʻia ke kaomi ma waena o 0.40.8Mpa;

ʻO ka hana 4, neutralization: e hoʻohui i ka waikawa acetic glacial i ana ʻia ma mua i ka ipu hao, e kaomi i loko o ka mea etherified no ka neutralization, e hoʻomehana i 75 ~ 80 ℃ e hoʻokō i ka ua, piʻi ka mahana i 102 ℃, a ʻo ka waiwai pH ʻike he 68. Ke pau ka ua, ua hoʻopiha ʻia ka pahu ua me ka wai piula i mālama ʻia e ka hāmeʻa osmosis hoʻohuli ma 90 ℃ ~ 100 ℃;

ʻO ka hana ʻelima, ka holoi centrifugal: ua centrifuged ʻia ka mea ma ka hana ʻehā e kahi centrifuge wili ākea, a ua hoʻoili ʻia ka mea i hoʻokaʻawale ʻia i kahi ipu holoi i piha i ka wai wela ma mua, a ua holoi ʻia ka mea;

ʻO ke ono o ka hana, ka hoʻomaloʻo centrifugal: lawe ʻia ka mea i holoi ʻia i loko o ka mea maloʻo ma o ka centrifuge wili ākea, hoʻomaloʻo ʻia ka mea ma 150-170°C, a ua wili ʻia a hoʻopaʻa ʻia ka mea maloʻo.

Ke hoʻohālikelike ʻia me nā mea e kū neiʻEtera celluloseʻenehana hana, hoʻohana ka mea i hana ʻia i kēia manawa i ka ethylene oxide ma ke ʻano he etherifying agent e hoʻomākaukau ai i ka hydroxyethyl methyl cellulose, a he hiki ke kūʻē i ka mildew maikaʻi no ka mea aia i loko o ka hui hydroxyethyl, kūpaʻa maikaʻi ka viscosity a me ke kūpaʻa ʻana i ka mildew i ka wā mālama lōʻihi. Hiki ke hoʻohana ʻia ma kahi o nā cellulose ethers ʻē aʻe.