ẢNH HƯỞNG CỦA CHIẾU XẠ GAMMA TỚI MỨC ĐỘ KHÂU MẠCH CỦA MÀNG POLYME PHÂN HỦY SINH HỌC TPS/PBAT TỪ TINH BỘT NHỰA NHIỆT DẺO (TPS) VÀ POLYBUTYLENE ADIPATE TEREPHTHALATE (PBAT)

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Tác giả: Thị Tâm Đàm, Đức Minh Mai, Văn Vinh Mai, Duy Dưỡng Phạm, Mạnh Thắng Trần, Minh Quỳnh Trần, Xuân An Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2023

Mô tả vật lý: tr.109

Bộ sưu tập: Metadata

ID: 337879

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Tapioca starch is an available and rich source of material in Viet Nam, low-cost and biodegradable.However, it is necessary to modify the starch into thermoplastic starch before blending it with otherbiodegradable polymers. In this research, thermoplastic starch was synthesized from Tapioca starch withGlycerol and Ethylene Glycol
TWEEN 80. The FT-IR spectrum shows that Glycerol and Ethylene Glycolplasticizers mix well with starch and don’t change the structure of the starch. The TGA spectrum of starchand thermoplastic starch shows that thermoplastic starch synthesized is a homogeneous plastic. TPS hasbeen blended with biodegradable polymer Polybutylene adipate terephthalate (PBAT) to make TPS/PBATpolymer films. The films were irradiated with doses of 10, 20, 40, 50, 60 and 100 kGy. Gel fractionmeasurements of the TPS/PBAT film before and after irradiation showed that the degree of crosslinking inthe TPS with PBAT increased with the increased irradiation doses. The highest gel fraction of the film was80.2% when irradiated with a dose of 100 kGy. The degradation test with the alpha-amalyse enzymeshowed the TPS/PBAT polymer film lost approximately 54% of its weight after 14 days.Tinh bột sắn là nguồn nguyên liệu sẵn có tại Việt Nam có giá thành rẻ và có khả năng phân hủy sinhhọc. Tuy nhiên cần phải biến tính tinh bột thành tinh bột nhựa nhiệt dẻo (TPS) trước khi phối trộn vớipolyme phân hủy sinh học khác. Trong nghiên cứu này, Tinh bột sắn phối trộn với Glyxerin và EthyleneGlycol
TWEEN 80 tạo thành TPS. Phổ FT-IR của TPS cho thấy Glyxerin và Ethylene Glycol phối trộn tốt vàkhông làm thay đổi cấu trúc của tinh bột. So sánh phổ TGA của tinh bột và TPS cho thấy TPS được tạo ra làchất đồng nhất. Sau đó, TPS đã được phối trộn với polyme phân hủy sinh học Polybutylene adipateterephthalate (PBAT) để tạo màng polyme TPS/PBAT. Màng được chiếu xạ gamma ở các liều chiếu 10, 20,40, 50, 60, 100 kGy. Đo phần Gel của màng TPS/PBAT trước và sau chiếu xạ cho thấy mức độ khâu mạch củaTPS với PBAT tăng dần theo các liều chiếu xạ. Hàm lượng Gel của màng cao nhất ở liều chiếu xạ 100 kGy đạt80,2%. Thử nghiệm phân hủy bởi enzyme alpha-amalyse cho thấy màng polyme TPS/PBAT bị mất khoảng54% khối lượng của màng sau 14 ngày.

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