{"id":118414,"date":"2022-08-17T10:30:55","date_gmt":"2022-08-17T02:30:55","guid":{"rendered":"https:\/\/www.alpapowder.com\/118414\/"},"modified":"2022-08-16T14:37:21","modified_gmt":"2022-08-16T06:37:21","slug":"anh-huong-cua-kich-thuoc-hat-cua-canxi-cacbonat-bien-tinh-axit-stearic-den-tinh-chat-cua-mang-tong-hop-pbat","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/118414\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat bi\u1ebfn t\u00ednh axit stearic \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a m\u00e0ng t\u1ed5ng h\u1ee3p PBAT"},"content":{"rendered":"

\"\"<\/p>\n

Polybutylen adipate \/ terephthalate (PBAT) l\u00e0 ch\u1ea5t \u0111\u1ed3ng tr\u00f9ng h\u1ee3p c\u1ee7a butylene adipate v\u00e0 butylene terephthalate, kh\u00f4ng ch\u1ec9 c\u00f3 \u0111\u1ed9 d\u1ebbo dai v\u00e0 \u1ed5n \u0111\u1ecbnh t\u1ed1t m\u00e0 c\u00f2n c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n h\u1ee7y sinh h\u1ecdc tuy\u1ec7t v\u1eddi, l\u00e0 v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i m\u00e0ng b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng xanh l\u00fd t\u01b0\u1edfng v\u00e0 n\u00f3 c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u nhi\u1ec1u nh\u1ea5t ch\u1ea5t d\u1ebbo ph\u00e2n h\u1ee7y sinh h\u1ecdc.<\/p>\n

Tuy nhi\u00ean, b\u1ea3n th\u00e2n \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a PBAT th\u1ea5p, t\u1ed1c \u0111\u1ed9 ph\u00e2n h\u1ee7y ch\u1eadm, gi\u00e1 th\u00e0nh g\u1ea5p 5 \u0111\u1ebfn 6 l\u1ea7n polypropylene th\u00f4ng th\u01b0\u1eddng n\u00ean c\u00f2n h\u1ea1n ch\u1ebf trong vi\u1ec7c \u1ee9ng d\u1ee5ng v\u00e0 qu\u1ea3ng b\u00e1. Nghi\u00ean c\u1ee9u hi\u1ec7n t\u1ea1i t\u1eadp trung v\u00e0o vi\u1ec7c l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u ph\u00e2n h\u1ee7y sinh h\u1ecdc v\u1edbi hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i v\u00e0 chi ph\u00ed th\u1ea5p. H\u1ea7u h\u1ebft c\u00e1c nghi\u00ean c\u1ee9u l\u00e0 \u0111i\u1ec1u ch\u1ebf v\u1eadt li\u1ec7u composite xanh b\u1eb1ng c\u00e1ch tr\u1ed9n c\u00e1c ch\u1ea5t \u0111\u1ed9n t\u01b0\u01a1ng \u0111\u1ed1i r\u1ebb v\u1edbi PBAT, \u0111\u1ea3m b\u1ea3o \u0111\u1ed3ng th\u1eddi c\u00e1c \u0111\u1eb7c t\u00ednh ph\u00e2n h\u1ee7y c\u1ee7a n\u00f3. Ki\u1ec3m so\u00e1t chi ph\u00ed v\u00e0 m\u1edf r\u1ed9ng gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng.<\/p>\n

Do gi\u00e1 th\u00e0nh r\u1ebb v\u00e0 t\u00e1c d\u1ee5ng d\u1ebbo dai nh\u1ea5t \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi polyme, canxi cacbonat l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t \u0111\u1ed9n polyme \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t. S\u1eed d\u1ee5ng canxi cacbonat l\u00e0m b\u1ed9t tr\u00e1m \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p PBAT \/ canxi cacbonat \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00e1ch kh\u1ea3 thi \u0111\u1ec3 gi\u1ea3m chi ph\u00ed c\u1ee7a PBAT. B\u1eb1ng c\u00e1ch nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p b\u1eadc ba PLA \/ PBAT \/ nano canxi cacbonat, c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 v\u1eadt l\u00fd c\u1ee7a v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 sau khi th\u00eam nano canxi cacbonat. PBAT \u0111\u01b0\u1ee3c l\u00e0m \u0111\u1ea7y b\u1eb1ng canxi cacbonat, v\u00e0 ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng canxi cacbonat l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed trong khi c\u1ea3i thi\u1ec7n c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a composite. PBAT bi\u1ebfn t\u00ednh b\u1eb1ng canxi cacbonat si\u00eau m\u1ecbn, khi th\u00eam 20% canxi cacbonat, v\u1eadt li\u1ec7u composite v\u1eabn c\u00f3 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd t\u1ed1t.<\/p>\n

Vi\u1ec7c s\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t c\u1ee7a ba lo\u1ea1i canxi cacbonat v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc h\u1ea1t kh\u00e1c nhau \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi axit stearic, v\u00e0 m\u00e0ng composite PBAT \/ canxi cacbonat bi\u1ebfn t\u00ednh \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p tr\u1ed9n n\u00f3ng ch\u1ea3y. \u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0111\u1eb7c t\u00ednh c\u01a1 v\u00e0 t\u00ednh ch\u1ea5t truy\u1ec1n h\u01a1i n\u01b0\u1edbc ch\u1ee9ng t\u1ecf:<\/p>\n

(1) Qua ph\u00e2n t\u00edch k\u00edch th\u01b0\u1edbc h\u1ea1t, ph\u1ea1m vi ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat ho\u1ea1t t\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i r\u1ed9ng, ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu trong 1 ~ 20\u03bcm, k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh th\u1ec3 t\u00edch l\u00e0 7,6\u03bcm; k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat si\u00eau m\u1ecbn ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu trong 0,2 ~ 5\u03bcm, k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh v\u1ec1 th\u1ec3 t\u00edch. \u0110\u01b0\u1eddng k\u00ednh l\u00e0 1,5 \u03bcm; s\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a nano canxi cacbonat t\u01b0\u01a1ng \u0111\u1ed1i t\u1eadp trung, ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu trong 0,2-0,5 \u03bcm v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh v\u1ec1 th\u1ec3 t\u00edch l\u00e0 0,34 \u03bcm. Th\u00f4ng qua ph\u00e2n t\u00edch FTIR, ng\u01b0\u1eddi ta x\u00e1c nh\u1eadn r\u1eb1ng axit stearic \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u1ee7 th\u00e0nh c\u00f4ng tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a canxi cacbonat, v\u00e0 canxi cacbonat bi\u1ebfn t\u00ednh \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n trong ch\u1ea5t n\u1ec1n PBAT.<\/p>\n

(2) Sau khi th\u00eam canxi cacbonat bi\u1ebfn t\u00ednh, nhi\u1ec7t \u0111\u1ed9 k\u1ebft tinh, \u0111\u1ed9 k\u1ebft tinh v\u00e0 nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y c\u1ee7a PBAT \u0111\u01b0\u1ee3c t\u0103ng l\u00ean. Khi canxi cacbonat ho\u1ea1t h\u00f3a v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh th\u1ec3 t\u00edch l\u00e0 7,6 \u03bcm \u0111\u01b0\u1ee3c th\u00eam v\u00e0o, nhi\u1ec7t \u0111\u1ed9 k\u1ebft tinh \u0111\u1ea1t gi\u00e1 tr\u1ecb t\u1ed1i \u0111a l\u00e0 84,12 \u00b0 C, cao h\u01a1n 13,07 \u00b0 C so v\u1edbi PBAT tinh khi\u1ebft; \u0111\u1ed9 k\u1ebft tinh c\u0169ng \u0111\u1ea1t m\u1ee9c t\u1ed1i \u0111a, t\u1eeb 10,4% PBAT tinh khi\u1ebft \u0111\u1ebfn 11,48%. Khi b\u1ed5 sung canxi cacbonat nano bi\u1ebfn t\u00ednh, nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y \u0111\u1ea1t gi\u00e1 tr\u1ecb t\u1ed1i \u0111a l\u00e0 124,99 \u00b0 C.<\/p>\n

(3) C\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a m\u00e0ng t\u1ed5ng h\u1ee3p PBAT \/ canxi cacbonat bi\u1ebfn t\u00ednh \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3, v\u00e0 v\u1edbi vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat bi\u1ebfn t\u00ednh, c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc d\u1ea7n d\u1ea7n t\u0103ng l\u00ean. Khi b\u1ed5 sung canxi cacbonat nano bi\u1ebfn t\u00ednh v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh th\u1ec3 t\u00edch l\u00e0 0,34 \u03bcm, \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a m\u00e0ng composite \u0111\u1ea1t gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t l\u00e0 19,9 MPa, cao h\u01a1n 10,07 MPa so v\u1edbi PBAT tinh khi\u1ebft v\u00e0 bi\u1ebfn d\u1ea1ng \u0111\u1ee9t g\u00e3y danh ngh\u0129a \u0111\u1ea1t 551,8%, cao h\u01a1n PBAT thu\u1ea7n t\u00fay. N\u00f3 \u0111\u01b0\u1ee3c t\u0103ng th\u00eam 54% v\u00e0 \u0111\u1ed9 b\u1ec1n x\u00e9 g\u00f3c ph\u1ea3i t\u0103ng t\u1eeb 72,5kN \/ m c\u1ee7a PBAT nguy\u00ean ch\u1ea5t l\u00ean 139,3kN \/ m.<\/p>\n

(4) T\u00ednh ch\u1ea5t ng\u0103n c\u1ea3n h\u01a1i n\u01b0\u1edbc c\u1ee7a m\u00e0ng \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng sau khi th\u00eam canxi cacbonat bi\u1ebfn t\u00ednh. T\u1ed1c \u0111\u1ed9 truy\u1ec1n h\u01a1i n\u01b0\u1edbc c\u1ee7a m\u00e0ng composite b\u1ed5 sung canxi cacbonat ho\u1ea1t t\u00ednh l\u00e0 th\u1ea5p nh\u1ea5t, l\u00e0 232,3g \/ (m2 \u00b7 24h), th\u1ea5p h\u01a1n 28,06 so v\u1edbi m\u00e0ng PBAT nguy\u00ean ch\u1ea5t. %, h\u1ec7 s\u1ed1 th\u1ea5m h\u01a1i n\u01b0\u1edbc t\u01b0\u01a1ng \u1ee9ng gi\u1ea3m 66,09%.<\/p>\n","protected":false},"excerpt":{"rendered":"

Polybutylen adipate \/ terephthalate (PBAT) l\u00e0 ch\u1ea5t \u0111\u1ed3ng tr\u00f9ng h\u1ee3p c\u1ee7a butylene adipate v\u00e0 butylene terephthalate, kh\u00f4ng ch\u1ec9 c\u00f3 \u0111\u1ed9 d\u1ebbo dai v\u00e0 \u1ed5n \u0111\u1ecbnh t\u1ed1t m\u00e0 c\u00f2n c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n h\u1ee7y sinh h\u1ecdc tuy\u1ec7t v\u1eddi, l\u00e0 v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i m\u00e0ng b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng xanh l\u00fd t\u01b0\u1edfng v\u00e0 n\u00f3 c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u nhi\u1ec1u nh\u1ea5t ch\u1ea5t d\u1ebbo ph\u00e2n h\u1ee7y sinh h\u1ecdc.<\/p>\n","protected":false},"author":7,"featured_media":118390,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-118414","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/118414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=118414"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/118414\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/118390"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=118414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=118414"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=118414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}